会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 2. 发明授权
    • Preparation of (S)-Clopidogrel and related compounds
    • (S) - 氯吡格雷及相关化合物的制备
    • US06858734B2
    • 2005-02-22
    • US10421564
    • 2003-04-23
    • Richard A. Silva
    • Richard A. Silva
    • C07D495/04C07D515/02C07D401/02C07D409/02
    • C07D495/04Y02P20/582
    • A process for producing enantiomerically enriched (S)-α-(2-chlorophenyl)-6,7-dihydrothieno[3,2-c]pyridine-5 (4H)-acetic acid hydrocarbyl ester, represented by the formula: Is provided, wherein R1 and R2 are hydrogens and R3 is methyl (i.e., (S)-Clopidogrel). The process includes the steps of: (a) contacting N-2-chlorobenz-aldehyde-ylidene-1-ethylamine-2(2-thiophenyl)imine and an HCN source, in the presence of a non-metallic asymmetric Strecker catalyst to form enantiomerically enriched (S)-α,α-(2-thiophenylethylamino)(2-chlorophenyl)acetonitrile; (b) contacting the enantiomerically enriched (S)-α,α-(2-thiophenylethylamino)(2-chlorophenyl)acetonitrile and a formaldehyde equivalent, in the presence of an acid catalyst to form enantiomerically enriched α-5(4,5,6,7-tetrahydro[3,2-c]thienopyridyl)(2-chlorobenzyl)-nitrile; and (c) contacting the enantiomerically enriched α-5(4,5,6,7-tetrahydro[3,2-c]thienopyridyl)(2-chlorobenzyl)-nitrile and a reagent capable of converting a cyano group into an ester group to form enantiomerically enriched hydrocarbyl ester of (S)-α-(2-chlorophenyl)-6,7-dihydrothieno-[3,2-c]pyridine-5(4H)-acetic acid.
    • 制备由下式表示的对映异构体富集的(S)-α-(2-氯苯基)-6,7-二氢噻吩并[3,2-c]吡啶-5(4H) - 乙酸烃基酯的方法: 其中R 1和R 2是氢,R 3是甲基(即(S) - 氯吡格雷)。 该方法包括以下步骤:(a)在非金属不对称的Strecker催化剂存在下,使N-2-氯苯醛 - 亚基-1-乙胺-2(2-噻吩基)亚胺与HCN源接触以形成 对映体富集(S)-α,α-(2-噻吩乙基氨基)(2-氯苯基)乙腈; (b)在酸催化剂存在下使对映异构体富集的(S)-α,α-(2-噻吩乙基氨基)(2-氯苯基)乙腈和甲醛当量接触以形成对映体富集的α-5(4,5, 6,7-四氢[3,2-c]噻吩并吡啶基)(2-氯苄基) - 腈; 和(c)使对映体富集的α-5(4,5,6,7-四氢[3,2-c]噻吩并吡啶基)(2-氯苄基) - 腈和能够将氰基转化成酯基的试剂 形成(S)-α-(2-氯苯基)-6,7-二氢噻吩并[3,2-c]吡啶-5(4H) - 乙酸的对映体富集的烃基酯。