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GB744237A - Cyclopentanophenanthrene compounds and process for the production thereof - Google Patents

Cyclopentanophenanthrene compounds and process for the production thereof

Info

Publication number
GB744237A
GB744237A GB12838/52A GB1283852A GB744237A GB 744237 A GB744237 A GB 744237A GB 12838/52 A GB12838/52 A GB 12838/52A GB 1283852 A GB1283852 A GB 1283852A GB 744237 A GB744237 A GB 744237A
Authority
GB
United Kingdom
Prior art keywords
trione
dione
acid
anhydride
acetoxyallopregnane
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB12838/52A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Syntex SA
Original Assignee
Syntex SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Syntex SA filed Critical Syntex SA
Publication of GB744237A publication Critical patent/GB744237A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07JSTEROIDS
    • C07J5/00Normal steroids containing carbon, hydrogen, halogen or oxygen, substituted in position 17 beta by a chain of two carbon atoms, e.g. pregnane and substituted in position 21 by only one singly bound oxygen atom, i.e. only one oxygen bound to position 21 by a single bond
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07JSTEROIDS
    • C07J75/00Processes for the preparation of steroids in general

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

The invention comprises: (a) 3b : 17a -dihydroxyallopregnane-11 : 20-dione; (b) the preparation thereof by a combination of the following steps (or the last one or more of them): (i) selectively reducing allopregnane-3 : 11 : 20-trione with hydrogen in the presence of Raney nickel catalyst to 3b -hydroxyallopregnane-11 : 20-dione, (ii) esterifying this with a fatty acid esterifying agent containing not more than 6 carbon atoms in the acyl group, (iii) treating the resulting ester with a fatty acid anhydride containing not more than 6 carbon atoms in the acyl group, in the presence of an aromatic sulphonic acid, to form the corresponding triacylate of D 11,17-allopregnadiene-3b : 11 : 20-triol, and (iv) treating this with an aromatic peracid followed by saponification; (c) treatment of (a) with bromine to produce its 21-bromo derivative; (d) treatment of the product of (c) with sodium iodide and potassium acetate to produce 3b : 17a -dihydroxy-21-acetoxyallopregnane-11 : 20-dione; (e) selective oxidation of the product of (d) with N-bromoacetamide in the presence of pyridine to 17a -hydroxy-21-acetoxyallopregnane-3 : 11 : 20-trione. In an example, step (i) is effected in a 1 : 1 mixture of ethanol and dioxane, step (ii) with acetic (or propionic) anhydride and pyridine, step (iii) with acetic anhydride in the presence of p-toluenesulphonic acid, step (iv) with perbenzoic acid in chloroform followed by methanolic caustic soda, process (c) with a solution of bromine in chloroform, and process (d) by refluxing in acetone. Specification 735,429 is referred to. Allopregnane-3 : 11 : 20-trione is prepared by shaking D 4 - pregnane - 3 : 11 : 20 - trione (11-ketoprogesterone) in an organic solvent (e.g. ethyl acetate) with hydrogen in the presence of a previously reduced 10 per cent palladiumcharcoal catalyst.
GB12838/52A 1951-05-25 1952-05-21 Cyclopentanophenanthrene compounds and process for the production thereof Expired GB744237A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
MX744237X 1951-05-25

Publications (1)

Publication Number Publication Date
GB744237A true GB744237A (en) 1956-02-01

Family

ID=19742989

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12838/52A Expired GB744237A (en) 1951-05-25 1952-05-21 Cyclopentanophenanthrene compounds and process for the production thereof

Country Status (1)

Country Link
GB (1) GB744237A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3070614A (en) * 1960-04-22 1962-12-25 Ormonoterapia Richter Spa 16-methyl-pregnane
US3345387A (en) * 1964-05-25 1967-10-03 Merck & Co Inc Process for producing 16beta-alkyl and 16beta-alkyl steroids of the pregnane series
US3461144A (en) * 1958-03-19 1969-08-12 Merck & Co Inc Novel 16beta-alkyl-17-oxygenated steroids and processes
USRE35517E (en) * 1987-08-25 1997-05-20 University Of Southern California Method, compositions, and compounds for modulating brain excitability

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3461144A (en) * 1958-03-19 1969-08-12 Merck & Co Inc Novel 16beta-alkyl-17-oxygenated steroids and processes
US3070614A (en) * 1960-04-22 1962-12-25 Ormonoterapia Richter Spa 16-methyl-pregnane
US3345387A (en) * 1964-05-25 1967-10-03 Merck & Co Inc Process for producing 16beta-alkyl and 16beta-alkyl steroids of the pregnane series
USRE35517E (en) * 1987-08-25 1997-05-20 University Of Southern California Method, compositions, and compounds for modulating brain excitability

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