JP6852671B2 - アルキルアミン誘導体の製造方法及びその製造中間体 - Google Patents
アルキルアミン誘導体の製造方法及びその製造中間体 Download PDFInfo
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- JP6852671B2 JP6852671B2 JP2017521942A JP2017521942A JP6852671B2 JP 6852671 B2 JP6852671 B2 JP 6852671B2 JP 2017521942 A JP2017521942 A JP 2017521942A JP 2017521942 A JP2017521942 A JP 2017521942A JP 6852671 B2 JP6852671 B2 JP 6852671B2
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- FVSKHRXBFJPNKK-UHFFFAOYSA-N propionitrile Chemical compound CCC#N FVSKHRXBFJPNKK-UHFFFAOYSA-N 0.000 description 1
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- 230000001681 protective effect Effects 0.000 description 1
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 125000005920 sec-butoxy group Chemical group 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 230000028327 secretion Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 239000001384 succinic acid Substances 0.000 description 1
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 description 1
- 150000003460 sulfonic acids Chemical class 0.000 description 1
- 150000003462 sulfoxides Chemical class 0.000 description 1
- NNVLQCWVLLOZNV-QRPNPIFTSA-N tert-butyl (2s)-3-amino-2-[(2-methylpropan-2-yl)oxycarbonylamino]propanoate;hydrochloride Chemical compound Cl.CC(C)(C)OC(=O)N[C@@H](CN)C(=O)OC(C)(C)C NNVLQCWVLLOZNV-QRPNPIFTSA-N 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
- 125000004044 trifluoroacetyl group Chemical group FC(C(=O)*)(F)F 0.000 description 1
- 125000002221 trityl group Chemical group [H]C1=C([H])C([H])=C([H])C([H])=C1C([*])(C1=C(C(=C(C(=C1[H])[H])[H])[H])[H])C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 1
- 238000004704 ultra performance liquid chromatography Methods 0.000 description 1
- 150000003672 ureas Chemical class 0.000 description 1
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 150000003751 zinc Chemical class 0.000 description 1
Classifications
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- C07C273/1809—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of substituted ureas with formation of the N-C(O)-N moiety
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Description
本出願人は既にCaSRアゴニスト作用を有し、CaSRの活性化により改善される疾患に対する治療剤又は予防剤として有用性の高いアルキルアミン誘導体に関する発明を行い、特許出願を行っている(特許文献1、特許文献2)。
特許文献1や特許文献2では、一般式(I−c)に含まれるウレア結合を有するアルキルアミン誘導体の一般的な製造方法として、下記スキームに示す方法が示されている(式中の記号は、特許文献1を参照のこと)。
即ち、本発明は、下記式(I)で表されるウレア結合を有するアルキルアミン誘導体を製造する工業的製法、及び、その製造に有用な中間体を提供する。
[1]
以下の工程(a)、(b)を含む、式(I)で表される化合物、又はその塩の製造方法:
(式中、R1は、水素原子であり、
Rhは、ヒドロキシ基、C1−6アルコキシ基、またはベンジルオキシ基を表し、
R2は、スルホ基であり、
R3及びR4は、それぞれ独立して、水素原子、置換もしくは非置換のC1−6アルキル基、ハロゲン原子、ヒドロキシ基、C1−6アルコキシ基、ニトロ基、または、アミノ基を表す)
(a)式(II):
(式中、R1aは、水素原子、またはアミノ基の保護基を表す。)
で表される化合物又はその塩に、カルボニル基導入試薬、及び、式(III):
で表される化合物またはその塩を、溶媒に溶解又は懸濁させ、塩基存在下又は非存在下において反応させる工程;および
(b)工程(a)で得られた反応物を、必要に応じて脱保護する工程。
[2]
式(II)において、R1aがベンジルオキシカルボニル基、t−ブトキシカルボニル基で表される上記[1]に記載の製造方法。
[3]
式(III)において、R3及びR4がそれぞれ独立して、水素原子、非置換のC1−6アルキル基、ハロゲン原子、または、ヒドロキシ基で表される上記[1]又は[2]に記載の製造方法。
[4]
前記カルボニル基導入試薬がクロロギ酸エステル、カルボニルジイミダゾール、ホスゲン、トリホスゲン、または炭酸ジメチルである上記[1]〜[3]のいずれか1項に記載の製造方法。
[5]
前記工程(a)において、前記カルボニル基導入試薬がカルボニルジイミダゾールであり、前記塩基は非存在であり、前記溶媒がアセトン、メチルエチルケトン、メチルイソブチルケトン、ジクロロメタン、テトラヒドロフラン及びアセトニトリルから選ばれる1種または2種以上の溶媒である、上記[1]〜[3]のいずれか1項に記載の製造方法。
[6]
前記工程(a)において、前記カルボニル基導入試薬がクロロギ酸エステルであり、前記塩基がトリエチルアミン、ピリジン、及びジイソプロピルエチルアミンから選ばれる1種または2種以上の塩基であり、前記溶媒がアセトニトリル、プロピオニトリル、ジクロロメタン、アセトン、N,N−ジメチルホルムアミドおよびテトラヒドロフランから選ばれる1種または2種以上の溶媒である、上記[1]〜[3]のいずれか1項に記載の製造方法。
[7]
前記クロロギ酸エステルがクロロギ酸メチル、クロロギ酸エチル、クロロギ酸フェニル、クロロギ酸4−クロロフェニルまたはクロロギ酸4−ニトロフェニルである上記[6]に記載の製造方法。
[8]
以下の工程(a−1)、(a−2)および(b)を含む、式(I)で表される化合物、又はその塩の製造方法:
(式中、R1は、水素原子であり、
Rhは、ヒドロキシ基、C1−6アルコキシ基、またはベンジルオキシ基を表し、
R2は、スルホ基であり、
R3及びR4は、それぞれ独立して、水素原子、置換もしくは非置換のC1−6アルキル基、ハロゲン原子、ヒドロキシ基、C1−6アルコキシ基、ニトロ基、または、アミノ基を表す)
(a−1)式(III):
で表される化合物またはその塩を、クロロギ酸エステルと溶媒に溶解又は懸濁させ、塩基存在下又は非存在下において反応させ、式(IVb):
(式中、Rh’はC1−6アルコキシ基、ベンジルオキシ基、またはフェノキシ基を示す。)の化合物、またはその塩を含む反応物を得る工程、
(a−2)上記工程(a−1)で得られた式(IVb)の化合物またはその塩を含む反応物に、式(II):
(式中、R1aは、水素原子、またはアミノ基の保護基を表す。)
で表される化合物又はその塩を、反応させる工程、
(b)工程(a−2)で得られた反応物を、必要に応じて脱保護する工程。
[9]
R1aがt−ブトキシカルボニル基であり、前記工程(b)において、脱保護試薬として塩酸、硫酸、p−トルエンスルホン酸、メタンスルホン酸、またはトリフルオロ酢酸を用いる上記[1]〜[8]のいずれか1項に記載の製造方法。
[10]
R1aがベンジルオキシカルボニル基であり、前記工程(b)において、脱保護試薬として臭化水素/酢酸を用いるか、パラジウム炭素を用いた水素化反応を行う上記[1]〜[8]のいずれか1項に記載の製造方法。
[11]
Rhがt−ブトキシ基であり、前記工程(b)において、脱保護試薬として塩酸、ギ酸、p−トルエンスルホン酸、トリフルオロ酢酸、水酸化カリウムを用いる上記[1]〜[8]のいずれか1項に記載の製造方法。
[12]
Rhがメトキシ基であり、前記工程(b)において、脱保護試薬として水酸化ナトリウム、水酸化カリウム、水酸化リチウムを用いる上記[1]〜[8]のいずれか1項に記載の製造方法。
[13]
下記式:
[14]
下記式:
[15]
逆相高速液体クロマトグラフィーによる精製を必要としない前記[1]〜[12]のいずれか1項に記載の製造方法。
ここで、「工業的製法」とは、目的物を工業的に製造するための効率的な方法を意味し、高収率、および/または高純度で目的物を製造する簡便な方法である。具体的には、工業的製法には適さない精製工程、例えば、逆相高速液体クロマトグラフィーによる精製、を必要としない製造方法である。
本発明の製造方法の各工程を、以下に詳細に説明する。
工程(a)
本工程は、式(II)の化合物またはその塩と式(III)の化合物またはその塩をカルボニル基導入試薬で反応させ、式(I)の化合物またはその塩を得る工程である。
上記反応は通常溶媒中で行われ、該溶媒としては、該反応を阻害しないものであれば何れでもよく、たとえば炭化水素類(例、n−ヘキサン、n−ヘプタン、石油エーテル、ベンゼン、トルエン、キシレンなど)、ハロゲン化炭化水素類(例、ジクロロメタン、クロロホルム、四塩化炭素、ジクロロエタン、クロロベンゼンなど)、エーテル類(例、ジエチルエーテル、ジイソプロピルエーテル、ジオキサン、テトラヒドロフラン、ジメトキシエタン、エチレングリコールジメチルエーテルなど)、アミド類(例、N,N−ジメチルホルムアミド、N,N−ジメチルアセトアミド、N−メチル−2−ピロリドンなど)、エステル類(例、酢酸エチル、酢酸イソプロピル、酢酸ブチル、酢酸プロピル、酢酸メチルなど)、ニトリル類(例、アセトニトリル、プロピオニトリルなど)、スルホキシド類(例、ジメチルスルホキシド、スルホランなど)、ケトン類(例、アセトン、メチルエチルケトン、メチルイソブチルケトン、シクロヘキノンなど)、酸類(例、ギ酸、酢酸、プロピオン酸、トリフルオロ酢酸、硫酸)、水、アルコール類(例、メタノール、エタノール、プロパノールなど)などが挙げられ、これらの溶媒は単独あるいは二種以上の混合系として用いることができる。
式(II)の化合物またはその塩とカルボニルジイミダゾールの反応により得られた反応物から、化合物(IVa)を単離して次の反応に供してもよいが、単離せずにそのまま反応物を使用し、式(III)の化合物またはその塩を加えるのが好ましい。
溶媒として、ケトン類、エーテル類、ハロゲン化炭化水素類が好ましく、アセトン、アセトニトリル、テトラヒドロフラン、ジクロロメタンが好ましく、特に、アセトンがより好ましい。反応溶媒の使用量は特に制限されないが、式(II)の化合物1gに対して、約1mlから約10mlが好ましい。塩基を使用する場合は、有機塩基が好ましく、ピリジンがより好ましい。好ましくは、塩基の非存在下で行う。CDIの使用量は、式(II)の化合物1モルに対して、通常、約1モルから約1.5モル、好ましくは約1.1モルである。反応温度は0℃から60℃までの間であり、5℃から40℃が好ましい。反応時間は、通常、約12時間〜24時間である。
式(III)の化合物またはその塩と置換されていても良いクロロギ酸フェニルの反応により得られた反応物から、化合物(IVb)を単離して次の反応に供してもよいが、単離せずにそのまま反応物を使用し、式(II)の化合物またはその塩を加えるのが好ましい。溶媒として、ニトリル類、アミド類、エーテル類が好ましく、アセトニトリル、N,N−ジメチルホルムアミド、テトラヒドロフランがより好ましく、特に、アセトニトリルがより好ましい。反応溶媒の使用量は特に制限されないが、式(III)の化合物1gに対して、約3mlから約20mlが好ましい。塩基は有機塩基が好ましく、カルバメート化では、ピリジンがより好ましく、ウレア化では、トリエチルアミン、ジイソプロピルエチルアミンがより好ましい。置換されていても良いクロロギ酸フェニルの使用量は、式(III)の化合物1モルに対して、通常、約1モルから約1.5モル、好ましくは約1.1モルである。塩基の使用量は、式(III)の化合物1モルに対して、通常、反応の活性化に必要となる量であり、約2モルから約6モルが好ましい。反応温度は0℃から70℃までの間であり、25℃から60℃が好ましい。反応時間は、通常、約4時間〜12時間である。
本工程は、得られる化合物により必要に応じて行われる工程であり、脱保護方法としては、酸性、塩基性条件下で脱保護試薬を用いて行うか、又は金属触媒存在下で、還元的脱保護反応(加水素分解)を行うことができる。
酸性条件における脱保護試薬としては、塩酸、臭化水素/酢酸、硫酸、ギ酸、p−トルエンスルホン酸、メタンスルホン酸、トリフルオロ酢酸などの酸類や、塩化アセチル/メタノール等の系中で酸類を発生させる方法などが挙げられる。中でも、R1がtert−ブトキシカルボニル基である場合、塩酸、メタンスルホン酸、が好ましく、R1がベンジルオキシカルボニル基である場合、臭化水素/酢酸が好ましく、Rhがtert−ブトキシ基である場合、塩酸が好ましい。
塩基性条件における脱保護試薬としては、上記の無機塩基、有機塩基などが挙げられる。中でも、Rhがメトキシ基である場合、水酸化ナトリウムが好ましい。
脱保護試薬として用いる金属触媒としては、パラジウム触媒(例、パラジウム炭素、水酸化パラジウム炭素、酸化パラジウム)、白金触媒(例、白金炭素、酸化白金)、ロジウム触媒(例、ロジウム炭素)、ルテニウム触媒(例、ルテニウム炭素)などが挙げられる。パラジウム触媒が好ましく、パラジウム炭素がより好ましい。
化学的に許容しうる酸との塩としては、無機酸(例えば、塩酸、硫酸、リン酸、硝酸、臭化水素酸、等)、有機カルボン酸(例えば、炭酸、酢酸、クエン酸、安息香酸、マレイン酸、フマル酸、酒石酸、コハク酸、トリフルオロ酢酸、タンニン酸、酪酸、デカン酸、サリチル酸、乳酸、シュウ酸、マンデル酸、リンゴ酸等)、有機スルホン酸(例えば、メタンスルホン酸、p−トルエンスルホン酸、ベンゼンスルホン酸等)との塩などが挙げられる。
化学的に許容しうる塩基との塩としては、アルカリ金属塩(例えば、ナトリウム塩、カリウム塩、リチウム塩等)、アルカリ土類金属塩(例えば、カルシウム塩、バリウム塩等)、金属塩(例えば、マグネシウム塩、アルミニウム塩等)などが挙げられる。
(分析条件)
各種分析手段および分析装置は、以下の通りである。
(1)1H及び13C NMRは、TMSを内部標準物質として、ブルッカー社製アバンス400MHz核磁気共鳴装置で測定を実施した。CDCl3、DMSO−d6、重水は市販品をそのまま使用した。
(2)HPLC分析装置には、以下からなるシステムを主に使用した。
ポンプ:島津製作所社製LC−10AT及びLC−10ATvp
オートサンプラー:協和精密社製KMT−100X
カラムオーブン:Shodex社製AO−30C及びGLサイエンス社製C0631、スガイ社製U−620
UV検出器:島津製作所社製SPD−10A及びSPD−10Avp
HPLCコントローラー:島津製作所社製SCL−10A及びSCL−10Avp
(3)HPLCデータ解析処理装置には、GLサイエンス社製EZ ChromElite (Ver.2.8.3、ビルド2249)と島津製作所社製Class−VP (バージョン6.10)及び(株)島津製作所社製のCR−7Aplusとを使用した。
(4)イオンクロマト(Clアニオン)には、米国ダイオネクス社製装置(DIONEX、DX−120)を使用し、データ解析装置は島津製作所社製CR−7Aplusを用いた。
イオンクロマト分析の溶離液には、1M Na2CO3/1M NaHCO3=9/1を使用し、分析サンプルはイオンフリーの水に溶解させて分析した。塩化物イオン(Cl−)の標準品は塩化カリウムを使用した。
(5)LC/MSスペクトルには、UPLC/SQDシステム、MS検出器:SQDを使用した。
(6)精密質量分析(HRMS)には、日本電子社製MS700V、FABマトリックスはYOKUEDL−FAB−Matrix(m−NBA/DTTの混合物)を使用した。
(7)本実施例において、使用した原料及び試薬類はいずれも市販品を特に精製することなくそのまま使用した。
3−アミノ−N−(tert−ブトキシカルボニル)−L−アラニン tert−ブチルエステル塩酸塩(以下、Boc−DAP−OtBu・HClと表記)(渡辺化学工業(株)社製)
3−アミノ−N−(tert−ブトキシカルボニル)−L−アラニン メチルエステル塩酸塩(以下、Boc−DAP−OMe・HClと表記)(渡辺化学工業(株)社製)
3−アミノ−N−(ベンジルオキシカルボニル)−L−アラニン メチルエステル塩酸塩 (以下、Cbz−DAP−OMe・HClと記載)(渡辺化学工業(株)社製)
3−アミノ−5−クロロ−2−ヒドロキシベンゼンスルホン酸(以下、ACHBと表記)(東京化成工業(株)社製)
3−アミノベンゼンスルホン酸(以下、ABSと表記)(東京化成工業(株)社製)
3−アミノ−5−クロロ−4−メチルベンゼンスルホン酸(以下、ACTSと表記)(東京化成工業(株)社製)
N,N‘−カルボニルジイミダゾール(以下、CDIと表記)(保土谷化学工業(株)社製)
クロロギ酸フェニル(東京化成工業(株)社製)
(8)HPLC分析条件は、以下のとおりである。
溶離液組成:A液−0.1%トリフルオロ酢酸水溶液、B液−0.1%トリフルオロ酢酸含有アセトニトリル、流速:1.0mL/min
検出器:UV(254 nm)、
使用カラム:逆相ODSシリカゲルカラム(資生堂社製 CAPCELL PAC typeMGII、カラムサイズ:内径φ4.6mm x 長150mm、5μm、或いは島津製作所社製 XR−ODS カラムサイズ:内径φ3.0mm × 長75mm 2.2μm)
カラム温度:40℃
グラジエント分析条件:
(A液/B液)=初期(99/1)〜25分後(10/90)〜30分後(10/90)、或いは
(A液/B液)=初期(99/1)〜12分後(10/90)
サンプル注入量:10μl
なお、本明細書中に用いられる略号は、以下の意味を表す。
AcOEt:酢酸エチル
AcOH:酢酸
ABS:3−アミノベンゼンスルホン酸
ACHB:3−アミノ−5−クロロ−2−ヒドロキシベンゼンスルホン酸
ACTS:3−アミノ−5−クロロ−4−メチルベンゼンスルホン酸
DAP:2,3−ジアミノプロパン酸
IPA:イソプロピルアルコール
MeCN:アセトニトリル
MsOH:メタンスルホン酸
Py:ピリジン
TEA:トリエチルアミン
THF:テトラヒドロフラン
(2S)−2−アミノ−3−{[(5−クロロ−2−ヒドロキシ−3−スルホフェニル)カルバモイル]アミノ}プロパン酸(化合物1)の合成
1H-NMR (400MHz, DMSO-d6): δ 8.3 (s, 1H), 8.2 (bs, 3H), 8.1 (d, 1H, J=2.6Hz), 7.3 (t, 1H, J=6.0Hz), 7.0 (d, 1H, J=2.6Hz), 4.0-4.1(m, 1H), 3.6-3.7(m, 1H), 3.4-3.5(m, 1H)
(2S)−2−アミノ−3−{[(3−スルホフェニル)カルバモイル]アミノ}プロパン酸(化合物2)の合成
1H-NMR (400MHz, DMSO-d6): δ 8.8 (s, 1H), 8.2 (bs, 3H), 7.7 (s, 1H), 7.3-7.4 (m, 1H), 7.1-7.2 (m, 2H), 6.3-6.4(bs, 1H), 4.0-4.1(bs, 1H), 3.6-3.7(bs, 1H), 3.5-3.6(bs, 1H)
(2S)−2−アミノ−3−{[(3−クロロ−2−メチル−5−スルホフェニル)カルバモイル]アミノ}プロパン酸(化合物3)の合成
1H-NMR (400MHz, DMSO-d6): δ 14.70-13.30 (bs, 1H), 8.27 (bs, 3H), 8.15 (s, 1H), 7.98 (d, 1H, J=1.6Hz), 7.27 (d, 1H, J=1.6Hz), 6.82 (t, 1H, J=6.0Hz), 4.04 (bs, 1H), 3.70-3.60 (m, 1H), 3.60-3.50 (m, 1H), 2.22 (s, 3H)
クロロギ酸フェニルをカルボニル基導入試薬として用いる化合物3の合成
(工程1)
水 30mLを加えて40℃、5kPaで77.0gまで濃縮した。AcOEt 100mL(10L/kg)を添加して分液操作を行った後、有機層に水30mLを加えて再度分液操作を行った。有機層を40℃、10kPaで47.6gまで濃縮した後、AcOEt 15mL(1.5L/kg)、THF 100mL(10L/kg)を添加した。再度、50.7gまで濃縮し、146gまでTHFを加えた。再び35.5gまで濃縮し、AcOEt 30mL(3L/kg)、THF 100mL(10L/kg)まで加えたところ、固体が析出した。5℃に冷却し、一晩熟成させた。析出した固体を減圧ろ過し、THF 20mL(2.0L/kg)で洗浄した後、30℃で一晩、40℃で3時間減圧乾燥して目的物24.9gを白色固体として得た(net 23.0g、83.6%)。
1H-NMR (400MHz, DMSO-d6): δ 8.86 (bs, 1H), 8.09 (s, 1H), 7.88 (s, 1H), 7.25 (d, 1H, J=1.6Hz), 7.14 (d, 1H, J=7.6Hz), 6.60 (t, 1H, J=5.6Hz), 4.00-3.90 (m, 1H), 3.60-3.50 (m, 1H), 3.30-3.20 (m, 1H), 3.15-3.05 (m, 6H), 2.19 (s, 3H), 1.50-1.30 (m, 18H), 1.20-1.10 (m, 9H)
(工程2)
(工程1)
3−({[(2S)−2−アミノ−3−メトキシ−3−オキソプロピル]カルバモイル}アミノ)−5−クロロ−4−メチルベンゼン−1−スルホン酸(化合物5)の合成
1H-NMR (400MHz, DMSO-d6): δ 8.39 (bs, 3H), 8.16 (d, 1H, J=1.2Hz), 7.90 (d, 1H, J=1.6Hz), 7.28 (d, 1H, J=1.6Hz), 6.78 (t, 1H, J=5.6Hz), 4.20-4.10 (m, 1H), 3.77(s, 3H), 3.70-3.60 (m, 1H), 3.55-3.45 (m, 1H), 2.21 (s, 3H)
HRMS (FAB-):calcd for m/z 364.0369(M-H), found m/z 364.0395(M-H)
(工程2)
1H-NMR (400MHz, DMSO-d6): δ8.76 (s, 1H), 7.91 (d, 1H, J=1.6Hz), 8.00-7.50 (bs, 2H), 7.24 (d, 1H, J=1.6Hz), 7.20(t, 1H, J=5.6Hz), 3.58-3.54(m, 1H), 3.47-3.43(m, 1H), 3.42-3.37(m, 1H), 2.23(s, 3H)
(工程1)
1H-NMR (400MHz, DMSO-d6): δ 9.76 (bs, 1H), 8.93-8.90 (m, 2H), 8.60-8.50 (m, 1H), 8.10-8.00 (m, 2H), 7.60 (s, 1H), 7.50-7.40 (m, 3H), 7.30-7.20(m, 3H), 2.30 (s, 3H)
(工程2)
クロロギ酸フェニルをカルボニル基導入試薬として用いる化合物7(化合物1のメチルエステル体)の合成
1H-NMR (400MHz, DMSO-d6): δ 7.22 (m, 1H), 7.14 (m, 1H), 4.36 (m, 1H), 3.80 (s, 3H), 3.20-3.40 (m, 2H).
クロロギ酸4−クロロフェニルをカルボニル基導入試薬として用いる化合物5の合成
クロロギ酸4−ニトロフェニルをカルボニル基導入試薬として用いる化合物5の合成
Boc−DAP−OHを用いた化合物3の合成
Claims (6)
- 以下の工程(a−1)、(a−2)および(b)を含む、式(I)で表される化合物、又はその塩の製造方法:
(式中、R1は、水素原子であり、
Rhは、ヒドロキシ基、C1−6アルコキシ基、またはベンジルオキシ基を表し、
R2は、スルホ基であり、
R3及びR4は、それぞれ独立して、水素原子、置換もしくは非置換のC1−6アルキル基、ハロゲン原子、ヒドロキシ基、C1−6アルコキシ基、ニトロ基、または、アミノ基を表す)
(a−1)式(III):
で表される化合物またはその塩を、クロロギ酸エステルと溶媒に溶解又は懸濁させ、塩基存在下又は非存在下において反応させ、式(IVb):
(式中、Rh’はC1−6アルコキシ基、ベンジルオキシ基、またはフェノキシ基を示す。)の化合物、またはその塩を含む反応物を得る工程、
(a−2)上記工程(a−1)で得られた式(IVb)の化合物またはその塩を含む反応物に、式(II):
(式中、Rhは、ヒドロキシ基、C1−6アルコキシ基、またはベンジルオキシ基を表し、R1aは、水素原子、またはアミノ基の保護基を表す。)
で表される化合物又はその塩を、反応させる工程、および
(b)工程(a−2)で得られた化合物を、必要に応じて脱保護する工程;
であって、前記方法は、逆相高速液体クロマトグラフィーによる精製工程を経ずに、少なくとも72.2%の収率で、かつ少なくとも89%の純度で、式(I)の化合物を得る、方法。 - R1aがtert−ブトキシカルボニル基であり、前記工程(b)において、前記脱保護が、脱保護剤として塩酸、硫酸、p−トルエンスルホン酸、メタンスルホン酸、またはトリフルオロ酢酸を用いる、請求項1に記載の製造方法。
- R1aがベンジルオキシカルボニル基であり、前記工程(b)において、前記脱保護が、脱保護剤として臭化水素/酢酸または、パラジウム炭素を用いる請求項1に記載の製造方法。
- Rhがtert−ブトキシ基であり、前記工程(b)において、前記脱保護が、脱保護剤として塩酸、ギ酸、p−トルエンスルホン酸、トリフルオロ酢酸、または水酸化カリウムを用いる、請求項1に記載の製造方法。
- Rhがメトキシ基であり、前記工程(b)において、前記脱保護が、脱保護剤として水酸化ナトリウム、水酸化カリウム、または水酸化リチウムを用いる、請求項1に記載の製造方法。
- 前記方法は、少なくとも76.2%の収率で、かつ少なくとも93%の純度で式(I)の化合物を得る、請求項1〜5のいずれか一項に記載の方法。
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CN115536556A (zh) | 2022-12-30 |
WO2016194881A1 (ja) | 2016-12-08 |
EP3305760A1 (en) | 2018-04-11 |
IL255815A (en) | 2018-01-31 |
CN107614486A (zh) | 2018-01-19 |
KR102593038B1 (ko) | 2023-10-25 |
JPWO2016194881A1 (ja) | 2018-03-22 |
KR20180015668A (ko) | 2018-02-13 |
CN116332809A (zh) | 2023-06-27 |
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