FARNESYL PROTEIN TRANSFERASE INHIBITOR COMBINATIONS WITH ANTI-TUMOR PODOPHYLLOTOXLN DERIVATIVES
The present invention is concerned with combinations of a farnesyl transferase inhibitor and an anti-tumor podophyllotoxin denvative for inhibiting the growth of tumor cells and useful in the treatment of cancer
Oncogenes frequently encode protein components of signal transduction pathways which lead to stimulation of cell growth and mitogenesis Oncogene expression in cultured cells leads to cellular transformation, charactenzed by the ability of cells to grow in soft agar and the growth of cells as dense foci lacking the contact inhibition exhibited by non-transformed cells Mutation and/or overexpression of certain oncogenes is frequently associated with human cancer A particular group of oncogenes is known as ras which have been identified in mammals, birds, insects, mollusks, plants, fungi and yeasts The family of mammalian ras oncogenes consists of three major members ("isoforms") H-ras, K-ras and N-ras oncogenes These ras oncogenes code for highly related proteins genencally known as p21ra5 Once attached to plasma membranes, the mutant or oncogenic forms of p21r< s will provide a signal for the transformation and uncontrolled growth of malignant tumor cells To acquire this transforming potential, the precursor of the p21ra,s oncoprotem must undergo an enzymatically catalyzed farnesylation of the cysteme residue located in a carboxyl- terminal tetrapeptide Therefore, inhibitors of the enzyme that catalyzes this modification, farnesyl protein transferase. will prevent the membrane attachment of p21raι and block the abenant growth of rαs-transformed tumors Hence, it is generally accepted in the art that farnesyl transferase inhibitors can be very useful as anticancer agents for tumors in which ras contnbutes to transformation
Since mutated, oncogenic forms of ras are frequently found in many human cancers, most notably in more than 50 % of colon and pancreatic carcinomas (Kohl et al , Science, vol 260, 1834 - 1837, 1993), it has been suggested that farnesyl tranferase inhibitors can be very useful against these types of cancer Following further investigations, it has been found that a farnesyl transferase inhibitor is capable of demonstrating antiprohferative effects ... vitro and antitumor effects in vivo in a vanety of human tumor cell lines with and without ras gene mutations
WO-97/21701 describes the preparation, formulation and pharmaceutical properties of farnesyl protein transferase inhibiting (imidazoly-5-yl)methyl-2-quinolinone derivatives of formulas (I), (II) and (III), as well as intermediates of formula (II) and (HI) that are metabolized in vivo to the compounds of formula (I). The compounds of formulas (I), (II) and (HI) are represented by
(I) (II)
(in) the pharmaceutically acceptable acid or base addition salts and the stereochemically isomeric forms thereof, wherein the dotted line represents an optional bond; X is oxygen or sulfur;
Rl is hydrogen, Ci -i2alkyl, Ar*, Ar^Ci-όalkyl, quinolinylCi-6alkyl, pyridylCi-6alkyl, hydroxyCi -6alkyl, Ci-6alkyloxyCi-6alkyl, mono- or di (C i -6alkyl)aminoC i -6alkyl, aminoC \ -όalkyl , or a radical of formula -Alk1-C(=O)-R9, -Alk!-S(O)-R9 or -Alk!-S(O)2-R9, wherein Alk* is Ci-6alkanediyl,
R9 is hydroxy, Cι_6alkyl, Cι_6alkyloxy, amino, Ci-8alkylamino or Cι_8alkylamino substituted with Ci -6alkyloxycarbonyl; R^, R3 and Rl°" each independently are hydrogen, hydroxy, halo, cyano, Cι_6alkyl, Ci -6alkyloxy, hydroxyCi -6alkyloxy, Ci-6alkyloxyCι_6alkyloxy, aminoCi-6alkyl-
oxy, mono- or di(Ci-6alkyl)aminoCi-6alkyloxy, Ar*, Ar^Ci-όalkyl, Arloxy, Ar^Ci- alkyloxy, hydroxycarbonyl, Cι_6alkyloxycarbonyl, trihalomethyl, trihalomethoxy, C2-6alkenyl, 4,4-dimethyloxazolyl; or when on adjacent positions R^ and R^ taken together may form a bivalent radical of formula
-O-CH2-O- (a-1),
-O-CH2-CH2-O- (a-2),
-O-CH=CH- (a-3),
-O-CH2-CH2- (a-4), -O-CH2-CH2-CH2- (a-5), or
-CH=CH-CH=CH- (a-6); R4 and R^ each independently are hydrogen, halo, Ar , Cι_6alkyl, hydroxyCι_6alkyl, Ci-όalkyloxyCi-galkyl, Ci-6alkyloxy, Ci-6alkylthio, amino, hydroxycarbonyl, Cι_6alkyloxycarbonyl, Ci-6alkylS(O)Ci-6alkyl or Ci-6alkylS(O)2Ci-6alkyl; R6 and R^ each independently are hydrogen, halo, cyano, Ci-6alkyl, Ci-βalkyloxy, Arloxy, trihalomethyl, Ci-6alkylthio, di(Cι_6alkyl)amino, or when on adjacent positions R^ and R^ taken together may form a bivalent radical of formula
-O-CH2-O- (c-1), or -CH=CH-CH=CH- (c-2);
R8 is hydrogen, Ci-βalkyl, cyano, hydroxycarbonyl, Ci-6alkyloxycarbonyl,
C 1 -6alkylcarbonylC 1 -6alkyl , cyanoC 1 -6alkyl, C 1 _6alkyloxycarbonylC 1 -6alkyl , carboxyCi-βalkyl, hydroxyCi -6alkyl, aminoCi-6alkyl, mono- or di(Cι_6alkyl)- aminoCi-6alkyl, imidazolyl, haloCi-6alkyl, Ci-6alkyloxyCi-6alkyl, aminocarbonylCi-βalkyl, or a radical of formula
-O-RlO (b-1),
-S-RlO (b-2),
-N-Rl lRl2 (b-3), wherein RlO is hydrogen, Cι_6alkyl, Ci-6alkylcarbonyl, Arl, Ar^Ci-όalkyl, Ci-6alkyloxycarbonylCι_6alkyl, or a radical or formula -Alk2-ORl3 or -Alk2-NR14R15; R11 is hydrogen, Ci-i2alkyl, Ar* or Ar^Ci-όalkyl; Rl2 is hydrogen, Cι_6alkyl, Ci-i6alkylcarbonyl, Ci-6alkyloxycarbonyl,
Ci-6alkylaminocarbonyl, Arl, Ar2Cι_6alkyl, Ci-βalkylcarbonyl- Cι_6alkyl, a natural amino acid, Arlcarbonyl, Ar^Ci-όalkylcarbonyl, aminocarbonylcarbonyl, Cι_6alkyloxyCι_6alkylcarbonyl, hydroxy,
Cι_6alkyloxy, aminocarbonyl, di(Ci-6alkyl)aminoCi-6alkylcarbonyl,
amino, Ci-6alkylamino, Ci-6alkylcarbonylamino, or a radical or formula -Alk2-OR13 or -Alk2-NR14R15; wherein Alk2 is Ci-6alkanediyl;
R!3 is hydrogen, Ci-6alkyl, Ci-βalkylcarbonyl, hydroxy-
Cι_6alkyl, Ar or Ar2Ci-6alkyl; Rl4 is hydrogen, Ci-6alkyl, Arl or Ar2Cι_6alkyl; Rl5 is hydrogen, Ci-6alkyl, Ci-βalkylcarbonyl, Ar or Ar2Ci-6alkyl; Rl7 is hydrogen, halo, cyano, Ci-6alkyl, Ci-6alkyloxycarbonyl, Arl ; R !8 is hydrogen, Cι_6alkyl, Ci-6alkyloxy or halo; Rl9 is hydrogen or Ci-6alkyl; Arl js phenyl or phenyl substituted with Ci-6alkyl, hydroxy, amino, Cι_6alkyloxy or halo; and Ar2 is phenyl or phenyl substituted with Ci-6alkyl, hydroxy, amino, Ci-6alkyloxy or halo.
WO-97/16443 concerns the preparation, formulation and pharmaceutical properties of farnesyl protein transferase inhibiting compounds of formula (IV), as well as intermediates of formula (V) and (VI) that are metabolized in vivo to the compounds of formula (IV). The compounds of formulas (IV), (V) and (VI) are represented by
(IV) (V)
(VI) the pharmaceutically acceptable acid or base addition salts and the stereochemically isomeric forms thereof, wherein the dotted line represents an optional bond; X is oxygen or sulfur;
Rl is hydrogen, Ci-I2alkyl, Arl, Ar2Ci-6alkyl, quinolinylCi-βalkyl, pyridyl- Cι_6alkyl, hydroxyCi -όalkyl, Cι_6alkyloxyCi-6alkyl, mono- or di(Cι_6alkyl)- aminoCi-6alkyl, aminoCι_6alkyl, or a radical of formula -Alkl-C(=O)-R9, -Alkl-S(O)-R9 or -Alkl-S(O)2-R9, wherein Alkl js Cι_6alkanediyl,
R9 is hydroxy, Ci-6alkyl, Ci-galkyloxy, amino, Ci-8alkylamino or Ci-8alkylamino substituted with Cι_6alkyloxycarbonyl; R2 and R3 each independently are hydrogen, hydroxy, halo, cyano, Ci-6alkyl, Cι_6alkyloxy, hydroxyCi -βalkyloxy, Ci-6alkyloxyCι_6alkyloxy, amino- Cι_6alkyloxy, mono- or di(Ci-6alkyl)aminoCi-6alkyloxy, Arl, Ar Ci-6alkyl,
Ar oxy, Ar2Ci-6alkyloxy, hydroxycarbonyl, Ci-6alkyloxycarbonyl, trihalomethyl, trihalomethoxy, C2-6alkenyl; or when on adjacent positions R2 and R3 taken together may form a bivalent radical of formula - -OO--CCHH72--OO-- (a-1), -O-CH2-CH2-O- (a-2),
-O-CH=CH- (a-3),
-O-CH2-CH2- (a-4),
-O-CH2-CH2-CH2- (a-5), or - -CCHH==CCHH--CCHH==CCHH-- (a-6);
R4 and R ,5 5 each independently are hydrogen, Ar1, Cι_6alkyl, Cι_6alkyloxyC].6alkyl,
Cι_6alkyloxy, C].6alkylthio, amino, hydroxycarbonyl, C].6alkyloxycarbonyl,
Cι.6alkylS(O)C].6alkyl or Cι_6alkylS(O)2C,.6alkyl;
R6 and R^ each independently are hydrogen, halo, cyano, Ci-6alkyl, Cι_6alkyloxy or Ar2oxy;
R8 IS hydrogen, Cι_6alkyl, cyano, hydroxycarbonyl, Ci-6alkyloxycarbonyl, Ci-βalkyl- carbonylCi-6alkyl, cyanoCi-6alkyl, Ci-6alkyloxycarbonylCi-6alkyl, hydroxy- carbonylCi-6alkyl, hydroxyCi -6alkyl, amιnoCι_6alkyl, mono- or dι(Ci-6alkyl)- amιnoCi-6alkyl, haloCi-6alkyl, Cι_6alkyloxyCi-6alkyl, ammocarbonylCi-6alkyl, Arl, Ar2Ci-6alkyloxyCi-6alkyl, Ci-6alkylthιoCi-6alkyl;
RIO IS hydrogen, Ci-6alkyl, Ci-βalkyloxy or halo;
Rl 1 is hydrogen or Cι_6alkyl,
Arl 1S phenyl or phenyl substituted with Ci-6alkyl, hydroxy, amino, Ci-6alkyloxy or halo; Ar2 is phenyl or phenyl substituted with Ci-galkyl, hydroxy, ammo, -galkyloxy or halo.
WO-98/40383 concerns the preparation, formulation and pharmaceutical properties of farnesyl protein transferase inhibiting compounds of formula (VII)
the pharmaceutically acceptable acid addition salts and the stereochemically isomenc forms thereof, wherein
the dotted line represents an optional bond;
X is oxygen or sulfur;
-A- is a bivalent radical of formula -CH=CH- (a-1), CH2-S- (a-6),
-CH2-CH2- (a-2), CH2-CH2-S- (a-7), -CH2-CH2-CH2- (a-3), CH=N- (a-8),
-CH2-O- (a-4), ■N=N- (a-9), or
-CH2-CH2-O- (a-5), CO-NH- (a-10); wherein optionally one hydrogen atom may be replaced by Ci-4alkyl or Arl; Rl and R2 each independently are hydrogen, hydroxy, halo, cyano, Ci-βalkyl, tnhalomethyl, tnhalomethoxy, C2-6alkenyl, Cι_6alkyloxy, hydroxyCι_6alkyloxy,
Ci-6alkyloxyCi-6alkyloxy, Ci-6alkyloxycarbonyl, ammoCi-6alkyloxy, mono- or
di(Ci-6alkyl)aminoCι_6alkyloxy, Ar2, Ar2-Cι_6alkyl, Ar2-oxy, Ar -Ci-6alkyloxy; or when on adjacent positions Rl and R2 taken together may form a bivalent radical of formula
-O-CH2-O- (b-1),
-O-CH2-CH2-O- (b-2),
-O-CH=CH- (b-3),
-O-CH2-CH2- (b-4),
-O-CH2-CH2-CH2- (b-5), or
-CH=CH-CH=CH- (b-6);
R3 and R4 each independently . ire hydrogen, halo, cyano, Cι_6alkyl, Ci-6alkyloxy,
Ar-^-oxy, Ci-βalkylthio, di(Cι_6alkyl)amino, trihalomethyl, trihalomethoxy, or when on adjacent positions R3 and R4 taken together may form a bivalent radical of formula
-O-CH2-O- (c-1),
-O-CH2-CH2-O- (c-2), or
-CH=CH-CH=CH- (c-3);
R^ is a radical of formula
~N (d-1), j{— R13 (d-2),
R13 R- wherein Rl3 is hydrogen, halo, Ar4, Ci-6alkyl, hydroxyCi -6alkyl, Ci-^alkyloxy- Cι_6alkyl, Cι_6alkyloxy, Cι_6alkylthio, amino, Ci-6alkyloxy- carbonyl, Ci-6alkylS(O)Ci-6alkyl or Ci-6alkylS(O)2Cι_6alkyl; Rl^is hydrogen, Ci-6alkyl or di(Ci-4alkyl)aminosulfonyl; R6 is hydrogen, hydroxy, halo, C -βalkyl, cyano, haloCi-6alkyl, hydroxyCi -όalkyl, cyanoCi-6alkyl, aminoCι_6alkyl, Ci-6alkyloxyCι_6alkyl, Ci-6alkylthioCi-6alkyl, aminocarbonylCi-6alkyl,
C 1 -6alkyloxycarbonylC i-6alkyl, C 1 -6alkylcarbonyl-C 1 _6alkyl, Ci-6alkyloxycarbonyl, mono- or di(Ci-6alkyl)aminoCi-6alkyl, Ar , Ar5-Ci-6alkyloxyCι_6alkyl; or a radical of formula -O-R7 (e-1), -S-R7 (e"2),
-N-RδR9 (e-3), wherein R7 is hydrogen, Ci-βalkyl, Cι_6alkylcarbonyl,
Ci-6alkyloxycarbonylCι_6alkyl, or a radical of formula -Alk-OR 0 or -Alk-NRllRl2; R8 is hydrogen, Cι_6alkyl, Ar7 or Ar"7-Cι_6alkyl;
R9 is hydrogen, Ci-6alkyl, Ci-ζalkylcarbonyl, Ci-6alkyloxycarbonyl, Ci-6alkylaminocarbonyl, Ar^, Ar^-Ci-βalkyl, Ci-βalkylcarbony]- Ci-6alkyl, Ar°-carbonyl, Ar°-Cι_6alkylcarbonyl, aminocarbonyl- carbonyl, Ci-βalkyloxyCi-βalkylcarbonyl, hydroxy, Ci-galkyloxy, aminocarbonyl, di(Ci-6alkyl)aminoCi-6alkylcarbonyl, amino,
Ci-βalkylamino, Ci-galkylcarbonylamino, or a radical or formula -Alk-OR10 or -Alk-NRURl2; wherein Alk is Ci-galkanediyl;
RIO is hydrogen, Ci-6alkyl, Ci-βalkylcarbonyl, hydroxyCi -6alkyl, Ar9 or Ar9-Ci-6alkyl;
RU is hydrogen, Ci-βalkyl, Ci-6alkylcarbonyl, ArlO or
Ar10-Cι_6alkyl;
Rl2 is hydrogen, Cι_6alkyl, ArH or Arl l-Ci-6alkyl; and
Arl t0 Aril are each independently selected from phenyl; or phenyl substituted with halo, Ci-6alkyl, Ci-βalkyloxy or trifluoromethyl.
WO-98/49157 concerns the preparation, formulation and pharmaceutical properties of farnesyl protein transferase inhibiting compounds of formula (VHI)
the pharmaceutically acceptable acid addition salts and the stereochemically isomeric forms thereof, wherein the dotted line represents an optional bond; X is oxygen or sulfur;
Rl and R2 each independently are hydrogen, hydroxy, halo, cyano, Ci-βalkyl, trihalomethyl, trihalomethoxy, C2-6alkenyl, Ci-6alkyloxy, hydroxyCi -6alkyloxy,
Cι_6alkyloxyCi-6alkyloxy, Ci-6alkyloxycarbonyl, aminoCi-6alkyloxy, mono- or di(Ci-6alkyl)aminoCi-6alkyloxy, Arl, ArlCi-6alkyl, Arloxy or ArlCi-6alkyloxy; R3 and R4 each independently are hydrogen, halo, cyano, Ci_6alkyl, Cι_6alkyloxy, Arloxy, Cι_6alkylthio, di(Ci-6alkyl)amino, trihalomethyl or trihalomethoxy;
R5 IS hydrogen, halo, Ci-βalkyl, cyano, haloCi-6alkyl, hydroxyCi -όalkyl, cyanoCi-6alkyl, ammoCi-βalkyl, Ci-6alkyloxyCι_6alkyl, C i -όalkyl thioC i -βalkyl, aminocarbonylC 1 -όalkyl , C i -όalkyloxycarbonylC i -βalkyl, C i -6alkylcarbonyl-C i -galkyl , Ci-6alkyloxycarbonyl, mono- or dι(Ci-6alkyl)ammoCi-6alkyl, Ar ,
ArlCi-6alkyloxyCι_6alkyl, or a radical of formula -O-RlO (a-1),
-S-RlO (a-2),
-N-Rl lRl2 (a-3), wherein Rl° IS hydrogen, Ci-6alkyl, Ci-6alkylcarbonyl, Ar , ArlCi-6alkyl,
Ci-6alkyloxycarbonylCi-6alkyl, or a radical of formula -Alk-ORl3 or -Alk-NRl4Rl5, RU IS hydrogen, Ci-6alkyl, Arl or ArlCi-6alkyl, Rl2 IS hydrogen, Ci-6alkyl, Ci-6alkylcarbonyl, Ci-6alkyloxycarbonyl, Ci-6alkylammocarbonyl, Arl, ArlCι_6alkyl, Ci-6alkylcarbonyl-
Ci-6alkyl, Arlcarbonyl, ArlCi-6alkylcarbonyl, aminocarbonyl- carbonyl, Ci-βalkyloxyCi-βalkylcarbonyl, hydroxy, Ci-6alkyloxy, aminocarbonyl, dι(Ci-6alkyl)amιnoCi-6alkylcarbonyl, amino, Ci_6alkylamino, Ci-6alkylcarbonylamιno, or a radical or formula -Alk-ORl3 or -Alk-NRl4Rl5, wherem Alk is Ci-6alkanedιyl,
Rl3 IS hydrogen, Ci-βalkyl, Ci-6alkylcarbonyl, hydroxy-
Ci-6alkyl, Arl or ArlCi-6 lkyl,
Rl4 ΪS hydrogen, Ci-6alkyl, Arl or ArlCi-β lkyl, Rl5 IS hydrogen, Ci-6alkyl, Ci-6alkylcarbonyl, Arl or
ArlCi-6alkyl,
R° ιs a radical of formula
— N \ J (b-1), { jj-R16 (b-2), \ R Λ N
R1 6 R I 1177 wherein Rl^s hydrogen, halo, Arl, Ci-βalkyl, hydroxyCi -βalkyl, Cι_6alkyloxy- Ci-6alkyl, Ci-ζalkyloxy, Ci-6alkylthιo, amino,
Ci-6alkyloxycarbonyl, Ci-6alkylthιoCi-6alkyl, Ci-6alkylS(O)Ci-6alkyl or Ci-6alkylS(O)2Ci-6alkyl, Rl ' IS hydrogen, Ci-6alkyl or dι(Ci-4alkyl)amιnosulfonyl, R7 is hydrogen or Cι_6alkyl provided that the dotted line does not represent a bond,
R8 is hydrogen, Ci-6alkyl or Ar CH2 or HetlCH2; R9 is hydrogen, Ci-βalkyl , Ci-6alkyloxy or halo; or
R8 and R9 taken together to form a bivalent radical of formula -CH=CH- (c-1),
-CH2-CH2- (c-2),
-CH2-CH2-CH2- (c-3), -CH2-O- (c-4), or
-CH2-CH2-O- (c-5);
Arl is phenyl; or phenyl substituted with 1 or 2 substituents each independently selected from halo, Cι_6alkyl, Cι_6alkyloxy or trifluoromethyl;
Ar2 is phenyl; or phenyl substituted with 1 or 2 substituents each independently selected from halo, Cι_6alkyl, Ci-6alkyloxy or trifluoromethyl; and
Hetl js pyridinyl; pyridinyl substituted with 1 or 2 substituents each independently selected from halo, Ci-6alkyl, Cι_6alkyloxy or trifluoromethyl.
WO-00/39082 concerns the preparation, formulation and pharmaceutical properties of farnesyl protein transferase inhibiting compounds of formula (IX)
or the pharmaceutically acceptable acid addition salts and the stereochemically isomeric forms thereof, wherein
=X!-X2-X3- is a trivalent radical of formula
=N-CR6=CR7- (x-1), =CR6-CR7=CR8- (x-6),
=N-N=CR6- (χ-2), =CR6-N=CR7- (x-7),
=N-NH-C(=O)- (x-3), =CR6-NH-C(=O)- (x-8), or
=N-N=N- (x-4), =CR6-N=N- (χ-9);
=N-CR6=N- (x-5), wherein each R , R and R are independently hydrogen, Cι. alkyl, hydroxy, C1- alkyloxy, aryloxy, Cι_ alkyloxycarbonyl, hydroxyCi.4alkyl, Cι_4alkyloxyCι_ alkyl, mono- or di(Cι.4alkyl)aminoCι.4alkyl, cyano, amino, thio, Cι_4alkylthio, arylthio or aryl;
1 7
>Y -Y - is a trivalent radical of formula
>CH-CHR9- (y-i),
>C=N- (y-2),
>CH-NR9- (y-3),or
>C=CR9- (y-4); wherein each R independently is hydrogen, halo, halocarbonyl, aminocarbonyl, hydroxyCi_4alkyl, cyano, carboxyl, Cι_ alkyl, Cι_ alkyloxy, C].4alkyloxyCι.4alkyl, Cι_4alkyloxycarbonyl, mono- or di(Cι_ alkyl)amino, mono- or di (C i . alkyl)aminoC i _4alkyl , aryl ; r and s are each independently 0, 1, 2, 3, 4 or 5; t is 0, 1, 2 or 3; each R1 and R2 are independently hydroxy, halo, cyano, Ci-galkyl, trihalomethyl, trihalomethoxy, C2.6alkenyl, Cι_6alkyloxy, hydroxyCι_ alkyloxy, Cι_6alkylthio, Cι_6alkyloxyCι_6alkyloxy, Cι_6alkyloxycarbonyl, aminoC]. alkyloxy, mono- or di(C]_6alkyl)amino, mono- or di(Cι_6alkyl)aminoCι.6alkyloxy, aryl, arylC].6alkyl, aryloxy or arylCι_6alkyloxy, hydroxycarbonyl, C].6alkyloxycarbonyl, aminocarbonyl, aminoCι_ alkyl, mono- or di(Ci.6alkyl)aminocarbonyl, mono- or di(Cι.6alkyl)aminoCι. alkyl; or two R1 or R2 substituents adjacent to one another on the phenyl ring may independently form together a bivalent radical of formula
O-CH2-O- (a-1),
O-CH2-CH2-O- (a-2),
O=CH=CH- (a-3),
O-CH2-CH2- (a-4),
O-CH2-CH2- CH2- (a-5), or
CH=CH-CH=CH- (a-6);
R3 is hydrogen, halo, Cj.6alkyl, cyano, haloCι_6alkyl, hydroxyCi _6alkyl, cyanoC]. alkyl, aminoCι_6alkyl, C].6alkyloxyCι.6alkyl, Cι.6alkylthioC].6alkyl, aminocarbonylC ι _6alkyl , hydroxycarbonyl , hydroxycarbonylC i _ alkyl , Cι.6alkyloxycarbonylCι.6alkyl, Cι_6alkylcarbonylCι.6alkyl, Cι.6alkyloxycarbonyl, aryl, arylCι_6alkyloxyCi-6alkyl, mono- or di(C].6alkyl)aminoCι_6alkyl; or a radical of formula
-O-R10 (b-1),
-S-R10 (b-2), -NRnR12 (b-3), wherein R10 is hydrogen, Cι_6alkyl, C].6alkylcarbonyl, aryl, arylCι_6alkyl,
C].6alkyloxycarbonylCι-6alkyl, or a radical of formula -Alk-OR13 or
-Alk-NR14R15; R11 is hydrogen, Ci 6alkyl, aryl or arylCi 6alkyl; R12 is hydrogen, Cι_6alkyl, aryl, hydroxy, amino, Ci 6alkyloxy,
Cι.6alkylcarbonylCι 6alkyl, arylCi 6alkyl, Ci 6alkylcarbonylamιno, mono- or dι(Cι 6alkyl)amιno. Ci 6alkylcarbonyl, aminocarbonyl, arylcarbonyl, haloCi 6alkylcarbonyl, arylCi 6alkylcarbonyl, Cι.6alkyloxycarbonyl, C) 6alkyloxyCι 6alkylcarbonyl, mono- or dι(Cι.6alkyl)amιnocarbonyl wherein the alkyl moiety may optionally be substituted by one or more substituents independently selected from aryl or
3alkyloxycarbonyl, aminocarbonylcarbonyl, mono- or dι(Cι 6alkyl)amιnoC] 6alkylcarbonyl, or a radical or formula -Alk-OR13 or -Alk-NRI4R15; wherein Alk is Ci 6alkanedιyl,
R13 is hydrogen, Ct 6alkyl, Ci 6alkylcarbonyl, hydroxyCi 6alkyl, aryl or arylCi 6alkyl; R14 is hydrogen, Ci 6alkyl, aryl or arylCi 6alkyl;
R15 is hydrogen, Ci 6alkyl, d 6alkylcarbonyl, aryl or arylCi 6alkyl; R4 is a radical of formula R16 (c-2),
wherein R16 is hydrogen, halo, aryl, d 6alkyl, hydroxyCi 6alkyl, Ci 6alkyloxyC] 6alkyl, Ci 6alkyloxy, Ci 6alkylthιo, amino, mono- or dι(Cι_4alkyl)amιno, hydroxycarbonyl, C_ 6alkyloxycarbonyl, Ci βalkylthioC) 6alkyl,
Ci 6alkylS(O)Cι 6alkyl or d 6alkylS(O)2C, 6alkyl;
R16 may also be bound to one of the nitrogen atoms in the imidazole nng of formula (c-1) or (c-2), in which case the meaning of R when bound to the nitrogen is limited to hydrogen, aryl, Cι_6alkyl, hydroxyCi 6alkyl,
Ci alkyloxyCι 6alkyl, Cι.6alkyloxycarbonyl, Ci 6alkylS(O)Cι.6alkyl or
Cι.6alkylS(O)2Cι 6alkyl;
R17 is hydrogen, Q 6alkyl, Cι_6alkyloxyCι 6alkyl, arylCi 6alkyl, tnfluoromethyl or dι(Cι_4alkyl)amιnosulfonyl; R is Ci 6alkyl , Ci 6alkyloxy or halo; aryl is phenyl, naphthalenyl or phenyl substituted with 1 or more substituents each independently selected from halo, C] 6alkyl, C] 6alkyloxy or tnfluoromethyl.
Podophyllotoxm, which is extracted from the mandrake plant, is the parent compound from which two glycosides have been developed which show significant therapeutic
activity in several human neoplasms, including pediatnc leukemia, small cell carcinomas of the lung, testicular tumors, Hodgkin's disease, and large cell lymphomas These denvatives are refened to as etoposide (VP-16) which has the chemical name 41- demethylepιpodophyllotoxιn-9-[4,6-O-(R)-ethylιdene-beta-D-glucopyranosιde] and teniposide (VM-26) which has the chemical name 41-demethylepιpodophyllotoxιn-9-[4,6- O-(R)-thenyhdene-beta-D-glucopyranosιde] These compounds have a similar mechanism of action which involves the induction of DNA strand breaks by an interaction with DNA topoisomerase II or the formation of free radicals Both etoposide and teniposide, however, suffer from certain toxic side-effects especially myelosuppression
There is therefore a need to increase the inhibitory efficacy of anti-tumor podophyllotoxm denvatives against tumor growth and also to provide a means for the use of lower dosages of anti-tumor podophyllotoxm denvatives to reduce the potential of adverse toxic side effects to the patient
It is an object of the invention to provide a therapeutic combination of an anti-tumor podophyllotoxm denvative and a farnesyl transferase inhibitor of the type descnbed above which has an advantageous inhibitory effect against tumor cell growth, in companson with the respective effects shown by the individual components of the combination
According to the invention therefore we provide a combination of an anti-tumor podophyllotoxm denvative and a farnesyl transferase inhibitor of formula (I), (II), (III), (IV), (V), (VI), (VII), (VHI) or (IX) above, in particular a compound of formula (I), (II) or (HI)
(I) (ID
(III) the pharmaceutically acceptable acid or base addition salts and the stereochemically isomeric forms thereof, wherein the dotted line represents an optional bond; X is oxygen or sulfur;
Rl is hydrogen, Ci-i2alkyl, Arl, Ar2Ci-6alkyl, quinolinylCi-βalkyl, pyridyl- Cι_6alkyl, hydroxyCi -βalkyl, Ci-6alkyloxyCi-6alkyl, mono- or di(Ci-6alkyl)- aminoCi-6alkyl, aminoCi-6alkyl, or a radical of formula -Alkl-C(=O)-R9, -Alkl-S(O)-R9 or -Alkl-S(O)2-R9, wherein Alkl js Ci-6alkanediyl,
R9 is hydroxy, Ci-6alkyl, Ci-6alkyloxy, amino, Ci-8alkylamino or Ci-8alkylamino substituted with Ci-βalkyloxycarbonyl; R2, R3 and Rl6 each independently are hydrogen, hydroxy, halo, cyano, Ci-βalkyl, Cι_6alkyloxy, hydroxyCi -όalkyloxy, Ci-6alkyloxyCι_6alkyloxy, aminoCi -όalkyloxy, mono- or di(Ci-6alkyl)aminoCi-6alkyloxy, Arl,
Ar2Ci-6alkyl, Ar2oxy, Ar2Cι_6alkyloxy, hydroxycarbonyl, Ci_6alkyloxycarbonyl, trihalomethyl, trihalomethoxy, C2-6alkenyl, 4,4- dimethyloxazolyl; or when on adjacent positions R2 and R3 taken together may form a bivalent radical of formula
-O-CH2-O- (a-1), -O-CH2-CH2-O- (a-2),
-O-CH=CH- (a-3), -O-CH2-CH2- (a-4), --OO--CCHH22--CCHH22--CCHH22-- (a-5), or -CH=CH-CH=CH- (a-6); R4 and R^ each independently are hydrogen, halo, Arl, Ci-βalkyl, hydroxyCi-βalkyl, Ci-6alkyloxyCi-6alkyl , Ci -όalkyloxy, Ci-6alkylthio, amino, hydroxycarbonyl, Ci-6alkyloxycarbonyl, Ci-6alkylS(O)Ci-6alkyl or Ci-6alkylS(O)2Ci-6alkyl;
R" and R7 each independently are hydrogen, halo, cyano, Ci-6alkyl, Ci-6alkyloxy,
Ar2oxy, trihalomethyl, Ci_6alkylthio, di(Ci-6alkyl)amino, or when on adjacent positions R" and R ' taken together may form a bivalent radical of formula -O-CH2-O- (c-1), or
-CH=CH-CH=CH- (c-2);
R8 is hydrogen, Ci-βalkyl, cyano, hydroxycarbonyl, Cι_6alkyloxycarbonyl, Cι_6alkyl- carbonylCι_6alkyl, cyanoCi-βalkyl, Ci-6alkyloxycarbonylCi-6alkyl, carboxy- Ci-6alkyl, hydroxyCi -6alkyl, aminoCι_6alkyl, mono- or di(Ci-6alkyl)amino- Ci-6alkyl, imidazolyl, haloCι_6alkyl, Ci-6alkyloxyCi-6alkyl, aminocarbonyl-
Ci-6alkyl, or a radical of formula
-O-RlO (b-1),
-S-RlO (b-2),
-N-Rl lRl2 (b-3), wherein R ^is hydrogen, Ci-6alkyl, Ci_6alkylcarbonyl, Arl, Ar2Cι_6alkyl,
Cι_6alkyloxycarbonylCi-6alkyl, or a radical or formula -Alk2-ORl3 or -Alk -NRl4Rl5; RU is hydrogen, Ci-I2alkyl, Arl or Ar2Ci-6alkyl; Rl2is hydrogen, Ci-6alkyl, Ci-i6alkylcarbonyl, Ci_6alkyloxycarbonyl, Cι_6alkylaminocarbonyl, Arl, Ar2Cι_6alkyl, Ci-6alkylcarbonyl-
Ci-6alkyl, a natural amino acid, Arlcarbonyl, Ar2Ci_6alkylcarbonyl, aminocarbonylcarbonyl, Ci-6alkyloxyCi-6alkylcarbonyl, hydroxy, Cι_6alkyloxy, aminocarbonyl, di(Ci-6alkyl)aminoCi-6alkylcarbonyl, amino, Ci-6alkylamino, Ci-6alkylcarbonylamino, or a radical or formula - Alk2-OR 1 or - Alk2-NR 14R 15 ; wherein Alk2 is Ci-6alkanediyl;
Rl3 is hydrogen, Ci-6alkyl, Ci_6alkylcarbonyl, hydroxyCi -όalkyl, Arl or Ar2Ci-6alkyl; Rl4 is hydrogen, Ci-6alkyl, Arl or Ar2Cι_6alkyl; Rl5 is hydrogen, Ci-6alkyl, Ci-6alkylcarbonyl, Arl or
Ar2Ci-6alkyl; Rl7is hydrogen, halo, cyano, Cι_6alkyl, Cι_6alkyloxycarbonyl, Arl ; Rl^is hydrogen, Ci-βalkyl, Cι_6alkyloxy or halo; Rl is hydrogen or Ci-6alkyl; Arl is phenyl or phenyl substituted with Ci-6alkyl, hydroxy, amino, Ci-6alkyloxy or halo; and
Ar2 is phenyl or phenyl substituted with Cι_6alkyl, hydroxy, amino, Ci-6alkyloxy or halo
The above descnbed combinations are hereinafter refened to as combinations according to the invention. These combinations may provide a synergistic effect whereby they demonstrate an advantageous therapeutic effect which is greater than that which would have been expected from the effects of the individual components of the combinations
In Formulas (I), (H) and (HI), R4 or R^ may also be bound to one of the nitrogen atoms in the imidazole nng In that case the hydrogen on the nitrogen is replaced by R4 or R^ and the meaning of R and R-> when bound to the nitrogen is limited to hydrogen, Arl, Ci-6alkyl, hydroxyCi -6alkyl, Ci-βalkyloxyCi-βalkyl, Ci-6alkyloxycarbonyl, Ci-6alkylS(O)Ci-6alkyl, Ci-6alkylS(O)2Ci-6alkyl.
Preferably the substituent Rl8 1S situated on the 5 or 7 position of the qumohnone moiety and substituent R IS situated on the 8 position when Rl8 IS on the 7 -position.
Interesting compounds are these compounds of formula (I) wherein X is oxygen.
Also interesting compounds are these compounds of formula (I) wherein the dotted line represents a bond, so as to form a double bond.
Another group of interesting compounds are those compounds of formula (I) wherein Rl IS hydrogen, Ci-6alkyl, Ci-6alkyloxyCi-6alkyl, dι(Ci-6alkyl)ammoCi-6alkyl, or a radical of formula -Alkl-C(=O)-R9, wherein Alkl 1S methylene and R9 is Ci-8alkyl- amino substituted with Ci-6alkyloxycarbonyl.
Still another group of interesting compounds are those compounds of formula (I) wherein R3 is hydrogen or halo; and R2 is halo, Ci-6alkyl, C2-6alkenyl, Ci_6alkyloxy, trihalomethoxy or hydroxyCi -6alkyloxy.
A further group of interesting compounds are those compounds of formula (I) wherem R2 and R3 are on adjacent positions and taken together to form a bivalent radical of formula (a-1), (a-2) or (a-3).
A still further group of interesting compounds are those compounds of formula (I)
wherein R^ IS hydrogen and R4 IS hydrogen or C -6alkyl
Yet another group of interesting compounds are those compounds of formula (I) wherein R7 is hydrogen, and R^ IS Ci-6alkyl or halo, preferably chloro, especially 4-chloro
A particular group of compounds are those compounds of formula (I) wherein R° is hydrogen, hydroxy, haloCi-βalkyl, hydroxyCi -όalkyl, cyanoCι_6alkyl, Ci-6alkyloxy- carbonylCi-6alkyl, lmidazolyl, or a radical of formula -NRI R 2 wherein R is hydrogen or Ci-i2alkyl and R 2 IS hydrogen, C -galkyl, C -6alkyloxy, hydroxy,
Ci-6alkyloxyC -6alkylcarbonyl, or a radical of formula -Alk2-ORl3 wherein Rl3 IS hydrogen or C -galkyl
Prefened compounds are those compounds wherein R IS hydrogen, Ci-galkyl, Cι_6alkyloxyCi-6alkyl, dι(Ci-6alkyl)amιnoCi-6alkyl, or a radical of formula
-Alkl-C(=O)-R9, wherem Alkl 1S methylene and R9 is Ci-8alkylamιno substituted with Ci-6alkyloxycarbonyl; R2 is halo, Cι_6alkyl, C2-6alkenyl, Cι_6alkyloxy, tnhalomethoxy, hydroxyCi_6alkyloxy or Arl, R3 1S hydrogen, R4 IS methyl bound to the nitrogen in 3-posιtιon of the imidazole; R^ IS hydrogen, R^ IS chloro, R7 is hydrogen, R8 IS hydrogen, hydroxy, haloCμόalkyl, hydroxyCi -όalkyl, cyanoC -βalkyl,
Cι_6alkyloxycarbonylCi-6alkyl, lmidazolyl, or a radical of formula -NRI R1 wherein Rl 1 is hydrogen or Ci-i2alkyl and Rl2 IS hydrogen, Ci-6alkyl, Ci-6alkyloxy,
Ci-6alkyloxyCι_6alkylcarbonyl, or a radical of formula -Alk2-ORl3 wherein Rl3 1S
Ci-6alkyl, R 7 IS hydrogen and R!& is hydrogen
Most preferred compounds are
4-(3-chlorophenyl)-6-[(4-chlorophenyl)hydroxy(l-methyl-lH-ιmιdazol-5-yl)methyl]-
1 -methyl-2( lH)-qumolιnone,
6-[ammo(4-chlorophenyl)-l-methyl-lH-ιmιdazol-5-ylmethyl]-4-(3-chlorophenyl)- l-methyl-2(lH)-quιnolmone,
6-[(4-chlorophenyl)hydroxy(l-methyl-lH-ιmιdazol-5-yl)methyl]-4-(3-ethoxyphenyl)-
1 -methyl-2( lH)-qumolmone,
6-[(4-chloroρhenyl)(l -methyl- lH-ιmιdazol-5-yl)me.hyl]-4-(3-ethoxyphenyl)- 1-methyl-
2(lH)-qumohnone monohydrochlonde monohydrate, 6-[ammo(4-chlorophenyl)(l-methyl-lH-ιmιdazol-5-yl)methyl]-4-(3-ethoxyphenyl)-l- methyl-2(lH)-qumolιnone,
6-amιno(4-chlorophenyl)(l-methyl-lH-ιmιdazol-5-yl)methyl]-l-methyl-4-(3- propylphenyl)-2(lH)-quιnohnone, a stereoisomenc form thereof or a pharmaceutically acceptable acid or base addition salt; and
(+)-6-[amιno(4-chlorophenyl)(l-methyl-lH-ιmιdazol-5-yl)methyl]-4-(3-chlorophenyl)- l-methyl-2(lH)-qumolιnone (Compound 75 in Table 1 of the Expenmental part of WO-97/21701) ; or a pharmaceutically acceptable acid addition salt thereof The latter compound is especially prefened
Further prefened embodiments of the present invention include compounds of formula (IX) wherein one or more of the following restnctions apply.
• =X'-X2-X3 is a tnvalent radical of formula (x-1), (x-2), (x-3), (x-4) or (x-9) wherein each R independently is hydrogen, Cι-4alkyl, Ci 4alkyloxycarbonyl, amino or aryl and R7 is hydrogen,
• >Y'-Y2- is a tnvalent radical of formula (y-1), (y-2), (y-3), or (y-4) wherein each R9 independently is hydrogen, halo, carboxyl, Ci alkyl or C\ alkyloxycarbonyl;
• t is 0;
• R1 is halo, Ci 6alkyl or two R1 substituents ortho to one another on the phenyl nng may independently form together a bivalent radical of formula (a-1),
• R2 is halo;
• R3 is halo or a radical of formula (b-1) or (b-3) wherem
R1 is hydrogen or a radical of formula -Alk-OR . R11 is hydrogen; R12 is hydrogen, Ci 6alkyl, Cι_ alkylcarbonyl, hydroxy, Ci 6alkyloxy or mono- or dι(Cι.6alkyl)ammoCι.6alkylcarbonyl; Alk is Cι.6alkanedιyl and R13 is hydrogen;
• R4 is a radical of formula (c-1) or (c-2) wherein
R16 is hydrogen, halo or mono- or dι(Cι_ alkyl)amιno; R17 is hydrogen or Ci 6alkyl;
• aryl is phenyl.
A particular group of compounds consists of those compounds of formula (IX) wherem =X'-X2-X3 is a tnvalent radical of formula (x-1), (x-2), (x-3), (x-4) or (x-9), >Y1-Y2 is a tnvalent radical of formula (y-2), (y-3) or (y-4), r is 0 or 1, s is 1, t is 0, R1 is halo, C(i_ )alkyl or forms a bivalent radical of formula (a-1), R2 is halo or C1-4alkyl, R3 is hydrogen or a radical of formula (b-1) or (b-3), R4 is a radical of formula (c-1) or (c-2),
R6 is hydrogen, Cι_4alkyl or phenyl, R7 is hydrogen, R9 is hydrogen or Cι_ alkyl, R10 is hydrogen or -Alk-OR13, R11 is hydrogen and R12 is hydrogen or C].6alkylcarbonyl and R13 is hydrogen;
Prefened compounds are those compounds of formula (IX) wherein =X'-X2-X3 is a trivalent radical of formula (x-1) or (x-4), >Y1-Y2 is a trivalent radical of formula (y- 4), r is 0 or 1, s is 1, t is 0, R1 is halo, preferably chloro and most preferably 3-chloro, R2 is halo, preferably 4-chloro or 4-fluoro, R3 is hydrogen or a radical of formula (b-1) or (b-3), R4 is a radical of formula (c-1) or (c-2), R6 is hydrogen, R7 is hydrogen, R9 is hydrogen, R10 is hydrogen, R11 is hydrogen and R12 is hydrogen;
Other prefened compounds are those compounds of formula (IX) wherein =X1-X2-XJ is a trivalent radical of formula (x-2), (x-3) or (x-4), >Y1-Y2 is a trivalent radical of formula (y-2), (y-3) or (y-4), r and s are 1, t is 0, R1 is halo, preferably chloro, and most preferably 3-chloro or R1 is Cι- alkyl, preferably 3-methyl, R2 is halo, preferably chloro, and most preferably 4-chloro, R3 is a radical of formula (b-1) or (b-3), R4 is a radical of formula (c-2), R6 is Cι_4alkyl, R9 is hydrogen, R10 and R11 are hydrogen and
1 "1
R is hydrogen or hydroxy.
The most prefened compounds of formula (IX) are
7-[(4-fluorophenyl)(lH-imidazol-l-yl)methyl]-5-phenylimidazo[l,2-a]quinoline; α-(4-chlorophenyl)- -(l-methyl-lH-imidazol-5-yl)-5-phenylimidazo[l,2-a]quinoline-
7-methanol;
5-(3-chlorophenyl)-α-(4-chlorophenyl)-α-(l -methyl- lH-imidazol-5-yl)-imidazo [1,2- a]quinoline-7-methanol;
5-(3-chlorophenyl)-α-(4-chlorophenyl)-α-(l-methyl-lH-imidazol-5-yl)imidazo[l,2- a]quinoline-7-methanamine;
5-(3-chlorophenyl)- -(4-chlorophenyl)-α-(l-methyl-lH-imidazol-5-yl)tetrazolo[l,5- a] quinoline-7-methanamine ; 5-(3-chlorophenyl)-α-(4-chlorophenyl)- 1 -methyl-α-( 1 -methyl- lH-imidazol-5-yl)- 1.2,4- triazolo[4,3-a]quinoline-7-methanol;
5-(3-chlorophenyl)-α-(4-chlorophenyl)-α-(l-methyl-lH-imidazol-5-yl)tetrazolo[l,5- a]quinoline-7-methanamine;
5-(3-chlorophenyl)-α-(4-chlorophenyl)-α-(l-methyl-lH-imidazol-5-yl)tetrazolo[l,5- a]quinazoline-7-methanol;
5-(3-chlorophenyl)-α-(4-chlorophenyl)-4,5-dihydro-α-(l-methyl-lH-imidazol-5- yl)tetrazolo[l,5-a]quinazoline-7-methanol;
5-(3-chlorophenyl)-α-(4-chlorophenyl)- -(l-methyl-lH-ιmιdazol-5-yl)tetrazolo[l,5- a]qumazolιne-7-methanamιne;
5-(3-chlorophenyl)-α-(4-chlorophenyl)-N-hydroxy-α-(l -methyl- lH-ιmιdazol-5- yl)tetrahydro[l,5-a]quιnolme-7-methanamιne; α-(4-chlorophenyl)-α-(l -methyl- lH-ιmιdazol-5-yl)-5-(3-methylphenyl)tetrazolo[ 1,5- a]quιnolιne-7-methanamιne; the pharmaceutically acceptable acid addition salts and the stereochemically isomenc forms thereof.
5-(3-chlorophenyl)- -(4-chlorophenyl)-α-(l -methyl- lH-ιmιdazol-5-yl)tetrazolo[ 1,5- a]qumazolιne-7-methanamιne, especially the (-) enantiomer, and its pharmaceutically acceptable acid addition salts are especially prefened
As used in the foregoing definitions and hereinafter halo defines fluoro, chloro, bromo and lodo; Ci-βalkyl defines straight and branched chained saturated hydrocarbon radicals having from 1 to 6 carbon atoms such as, for example, methyl, ethyl, propyl, butyl, pentyl, hexyl and the like; Cι_8alkyl encompasses the straight and branched chained saturated hydrocarbon radicals as defined in Ci-6alkyl as well as the higher homologues thereof containing 7 or 8 carbon atoms such as, for example heptyl or octyl; Ci-i2alkyl again encompasses Ci-8alkyl and the higher homologues thereof containing 9 to 12 carbon atoms, such as, for example, nonyl, decyl, undecyl, dodecyl; Ci-i6alkyl again encompasses Cι_i2alkyl and the higher homologues thereof containing 13 to 16 carbon atoms, such as, for example, tndecyl, tetradecyl, pentedecyl and hexadecyl; C2-6alkenyl defines straight and branched chain hydrocarbon radicals containing one double bond and having from 2 to 6 carbon atoms such as, for example, ethenyl, 2-propenyl, 3-butenyl, 2-pentenyl, 3-pentenyl, 3-methyl-2-butenyl, and the like; Ci-6alkanedιyl defines bivalent straight and branched chained saturated hydrocarbon radicals having from 1 to 6 carbon atoms, such as, for example, methylene, 1,2-ethanedιyl, 1,3-propanedιyl, 1,4-butanedιyl, 1,5-pentanedιyl, 1,6-hexanedιyl and the branched isomers thereof. The term "C(=O)" refers to a carbonyl group, "S(O)" refers to a sulfoxide and "S(O)2" to a sulfon. The term "natural ammo acid" refers to a natural ammo acid that is bound via a covalent amide linkage formed by loss of a molecule of water between the carboxyl group of the amino acid and the amino group of the remainder of the molecule. Examples of natural amino acids are glycine, alanine, vahne, leucine, isoleucine, methionine, prohne, phenylana ne, tryptophan, senne, threomne, cysteine, tyrosme, asparagine, glutamine, aspartic acid, glutamic acid, lysme, arginme, histidine.
The pharmaceutically acceptable acid or base addition salts as mentioned hereinabove are meant to compnse the therapeutically active non-toxic acid and non-toxic base addition salt forms which the compounds of formulas (I), (H), (HI), (IV), (V), (VI), (VH), (VHI) or (IX) are able to form The compounds of formulas (I), (H), (HI), (IV), (V), (VI), (VH), (VHI) or (IX) which have basic properties can be converted in their pharmaceutically acceptable acid addition salts by treating said base form with an appropnate acid Appropnate acids compnse, for example, inorganic acids such as hydrohahc acids, e.g hydrochlonc or hydrobromic acid, sulfunc, nitnc; phosphonc and the like acids; or organic acids such as, for example, acetic, propanoic, hydroxyacetic, lactic, pyruvic, oxalic, malonic, succmic (I e. butanedioic acid), maleic, fumanc, malic, tartanc, citnc, methanesulfonic, ethanesulfomc, benzenesulfonic, p-toluenesulfonic, cyclamic, salicylic, p-aminosalicyhc, pamoic and the like acids
The compounds of formulae (I), (H), (HI), (IV), (V), (VI), (VH), (VHI) or (IX) which have acidic properties may be converted in their pharmaceutically acceptable base addition salts by treating said acid form with a suitable organic or inorganic base. Appropnate base salt forms compnse, for example, the ammonium salts, the alkali and earth alkaline metal salts, e.g. the lithium, sodium, potassium, magnesium, calcium salts and the like, salts with organic bases, e.g. the benzathine, N-methyl-D-glucamme, hydrabamme salts, and salts with amino acids such as, for example, arginme, lysme and the like.
The terms acid or base addition salt also compnse the hydrates and the solvent addition forms which the compounds of formulae (I), (H), (HI), (IV), (V), (VI), (VH), (VHI) or (IX) are able to form. Examples of such forms are e.g. hydrates, alcoholates and the like.
The term stereochemically isomenc forms of compounds of formulae (I), (H), (HI), (IV), (V), (VI), (VH), (VEH) or (IX), as used hereinbefore, defines all possible compounds made up of the same atoms bonded by the same sequence of bonds but having different three-dimensional structures which are not interchangeable, which the compounds of formulae (I), (H), (HI), (IV), (V), (VI), (VH), (VHI) or (IX) may possess. Unless otherwise mentioned or indicated, the chemical designation of a compound encompasses the mixture of all possible stereochemically isomenc forms which said compound may possess. Said mixture may contain all diastereomers and/or enantiomers of the basic molecular structure of said compound All stereochemically isomenc forms of the compounds of formulae (I), (H), (HI), (IV),
(V), (VI), (VH), (VHI) or (IX) both in pure form or in admixture with each other are intended to be embraced within the scope of the present invention.
Some of the compounds of formulae (I), (H), (HI), (IV), (V), (VI), (VH), (VHI) or (IX) may also exist in their tautomeric forms. Such forms although not explicitly indicated in the above formula are intended to be included within the scope of the present invention.
Whenever used hereinafter, the term "compounds of formulae (I), (H), (HI), (IV), (V), (VI), (VH), (VHI) or (IX)" is meant to include also the pharmaceutically acceptable acid or base addition salts and all stereoisomeric forms.
Prefened anti-tumor anti-tumor podophyllotoxin derivatives for use in accordance with the invention include etoposide and teniposide refened to above. Etoposide is commercially available for example from Bristol-Myers Squibb under the trade name VePesid, and may be prepared for example as described in European patent specification No. 111058, or by processes analogous thereto. Teniposide is commercially available for example from Bristol-Myers Squibb under the trade name Vumon and may be prepared for example as described in PCT patent specification No. WO 93/02094, or by processes analogous thereto. Other anti-tumor podophyllotoxin derivatives may be prepared in conventional manner for example by processes analogous to those described above for etoposide and teniposide.
The present invention also relates to combinations according to the invention for use in medical therapy for example for inhibiting the growth of tumor cells.
The present invention also relates to the use of combinations according to the invention for the preparation of a pharmaceutical composition for inhibiting the growth of tumor cells.
The present invention also relates to a method of inhibiting the growth of tumor cells in a human subject which comprises administering to the subject an effective amount of a combination according to the invention.
This invention further provides a method for inhibiting the abnormal growth of cells, including transformed cells, by administering an effective amount of a combination according to the invention. Abnormal growth of cells refers to cell growth independent
of normal regulatory mechanisms (e.g. loss of contact inhibition) This includes the abnormal growth of . (1) tumor cells (tumors) expressing an activated ras oncogene, (2) tumor cells in which the ras protein is activated as a result of oncogenic mutation of another gene; (3) benign and malignant cells of other prohferative diseases in which abenant ras activation occurs Furthermore, it has been suggested in literature that ras oncogenes not only contnbute to the growth of of tumors in vivo by a direct effect on tumor cell growth but also indirectly, i.e. by facilitating tumor-mduced angiogenesis (Rak. J. et al, Cancer Research, 55, 4575-4580, 1995). Hence, pharmacologically targetting mutant ras oncogenes could conceivably suppress solid tumor growth in vivo, in part, by inhibiting tumor-mduced angiogenesis
This invention also provides a method for inhibiting tumor growth by admimstenng an effective amount of a combination according to the present invention, to a subject, e g a mammal (and more particularly a human) in need of such treatment. In particular, this invention provides a method for inhibiting the growth of tumors expressing an activated ras oncogene by the administration of an effective amount of combination according to the present invention. Examples of tumors which may be inhibited include, but are not limited to, lung cancer (e.g adenocarcinoma and including non- small cell lung cancer), pancreatic cancers (e.g. pancreatic carcinoma such as, for example exocnne pancreatic carcinoma), colon cancers (e.g. colorectal carcinomas, such as, for example, colon adenocarcinoma and colon adenoma), hematopoietic tumors of lymphoid lineage (e g. acute lymphocytic leukemia, B-cell lymphoma, Burkitt's lymphoma), myeloid leukemias (for example, acute myelogenous leukemia (AML)), thyroid folhcular cancer, myelodysplastic syndrome (MDS), tumors of mesenchymal ongin (e.g. fibrosarcomas and rhabdomyosarcomas), melanomas, teratocarcinomas, neuroblastomas, ghomas, benign tumor of the skin (e.g. keratoacanthomas), breast carcinoma (e.g. advanced breast cancer), kidney carninoma, ovary carcinoma, bladder carcinoma and epidermal carcinoma.
This invention also provides a method for inhibiting prohferative diseases, both benign and malignant, wherem ras proteins are abenantly activated as a result of oncogenic mutation in genes, i.e. the ras gene itself is not activated by mutation to an oncogenic mutation to an oncogenic form, with said inhibition being accomplished by the administration of an effective amount of a combination according to the invention, to a subject in need of such a treatment. For example, the benign prohferative disorder neurofibromatosis, or tumors in which ras is activated due to mutation or
overexpression of tyrosine kinase oncogenes may be inhibited by the combinations according to the invention.
The anti-tumor podophyllotoxin derivative and the farnesyl transferase inhibitor may be administered simultaneously (e.g. in separate or unitary compositions) or sequentially in either order. In the latter case, the two compounds will be administered within a period and in an amount and manner that is sufficient to ensure that an advantageous or synergistic effect is achieved. It will be appreciated that the prefened method and order of administration and the respective dosage amounts and regimes for each component of the combination will depend on the particular anti-tumor podophyllotoxin derivative and farnesyl transferase inhibitor being administered, their route of administration, the particular tumor being treated and the particular host being treated. The optimum method and order of administration and the dosage amounts and regime can be readily determined by those skilled in the art using conventional methods and in view of the information set out herein.
The farnesyl transferase inhibitor is advantageously administered in an effective amount of from 0.0001 mg/kg to 100 mg/kg body weight, and in particular from 0.001 mg/kg to 10 mg/kg body weight. More particularly, for an adult patient, the dosage is conveniently in the range of 50 to 500mg bid, advantageously 100 to 400 mg bid and particularly 300mg bid.
The anti-tumor podophyllotoxin derivative is advantageously administered in a dosage of 30 to 300 mg per square meter (mg/m2) of body surface area, for example 50 to 250mg/m2, particularly for etoposide in a dosage of about 35 to 100 mg/m2 and for teniposide in about 50 to 250 mg/m2 per course of treatment. These dosages may be administered for example once, twice or more per course of treatment, which may be repeated for example every 7,14,21 or 28 days.
It is especially prefened to administer the farnesyl tranferase inhibitor at a dosage of 100 or 200mg bid for 7, 14, 21 or 28 days with a dosage of the anti-tumor podophyllotoxin derivative in the ranges indicated above.
In view of their useful pharmacological properties, the components of the combinations according to the invention, i.e. the anti-tumor podophyllotoxin derivative and the farnesyl transferase inhibitor may be formulated into various pharmaceutical forms for administration purposes. The components may formulated separately in individual
pharmaceutical compositions or in a unitary pharmaceutical composition containing both components Farnesyl protein transferase inhibitors can be prepared and formulated into pharmaceutical compositions by methods known in the art and in particular according to the methods descnbed in the published patent specifications mentioned herein and incorporated by reference, for the compounds of formulae (I), (H) and (HI) suitable examples can be found in WO-97/21701. Compounds of formulae (IV), (V), and (VI) can be prepared and formulated using methods descnbed in WO 97/16443, compounds of formulae (VH) and (VHI) according to methods descnbed in WO 98/40383 and WO 98/49157 and compounds of formula (IX) according to methods descnbed in WO 00/39082 respectively.
The present invention therefore also relates to a pharmaceutical composition compnsmg an anti-tumor podophyllotoxm denvative and a farnesyl tranferase inhibitor of formula (I) together with one or more pharmaceutical earners. To prepare pharmaceutical compositions for use in accordance with the invention, an effective amount of a particular compound, in base or acid addition salt form, as the active ingredient is combined in intimate admixture with a pharmaceutically acceptable earner, which earner may take a wide vanety of forms depending on the form of preparation desired for administration. These pharmaceutical compositions are desirably in unitary dosage form suitable, preferably, for administration orally, rectally, percutaneously, or by parenteral injection. For example, in prepanng the compositions m oral dosage form, any of the usual pharmaceutical media may be employed, such as, for example, water, glycols, oils, alcohols and the like in the case of oral liquid preparations such as suspensions, syrups, elixirs and solutions; or solid earners such as starches, sugars, kaolin, lubncants, binders, disintegrating agents and the like in the case of powders, pills, capsules and tablets. Because of their ease in administration, tablets and capsules represent the most advantageous oral dosage unit form, in which case solid pharmaceutical earners are obviously employed. For parenteral compositions, the earner will usually compnse stenle water, at least in large part, though other ingredients, to aid solubility for example, may be included. Injectable solutions, for example, may be prepared in which the earner compnses saline solution, glucose solution or a mixture of saline and glucose solution. Injectable suspensions may also be prepared in which case appropnate liquid earners, suspending agents and the like may be employed. In the compositions suitable for percutaneous administration, the earner optionally compnses a penetration enhancing agent and/or a suitable wetting agent, optionally combined with suitable additives of any nature in minor proportions, which additives do not cause a significant deletenous effect to the
skm. Said additives may facilitate the administration to the skin and/or may be helpful for prepanng the desired compositions. These compositions may be administered in vanous ways, e.g., as a transdermal patch, as a spot-on, as an ointment
It is especially advantageous to formulate the aforementioned pharmaceutical compositions in dosage unit form for ease of administration and uniformity of dosage. Dosage unit form as used in the specification and claims herein refers to physically discrete units suitable as unitary dosages, each unit containing a predetermined quantity of active ingredient calculated to produce the desired therapeutic effect in association with the required pharmaceutical earner. Examples of such dosage unit forms are tablets (including scored or coated tablets), capsules, pills, powder packets, wafers, injectable solutions or suspensions, teaspoonfuls, tablespoonfuls and the like, and segregated multiples thereof.
It may be appropnate to administer the required dose of each component of the combination as two, three, four or more sub-doses at appropnate intervals throughout the course of treatment Said sub-doses may be formulated as unit dosage forms, for example, in each case containing independently 0.01 to 500 mg, for example 0.1 to 200 mg and in particular 1 to lOOmg of each active ingredient per unit dosage form.
Expenmental Testing of Combinations for Inhibition of Tumor Growth
The combinations according to the invention may be tested for their efficacy in inhibiting tumor growth using conventional assays descnbed in the literature for example the HTB177 lung carcinoma descnbed by Liu M et al, Cancer Research, Vol 58, No.21, 1 November 1998, pages 4947-4956, and the anti-mitotic assay descnbed by Moasser M et al, Proc. Natl. Acad. Sci. USA, Vol. 95, pages 1369-1374, February 1998. Other in vitro and in vivo models for determining ant-tumor effects of combinations and possible synergy of the combinations according to the invention are descnbed in WO 98/54966 and WO 98/32114. Clinical models for determining the efficacy and possible synergism for combination therapy in the clinic are generally descnbed in Cancer: Pnnciples and Practice of Oncology, Fifth Edition, edited by Vincent T DeVita, Jr., Samuel Hellman, Steven A. Rosenberg, Lippincott-Raven, Philadelphia, 1997, especially Chapter 17, pages 342-346.