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    • 1. 发明授权
    • Process for the optical resolution of 3-(p-chlorophenyl)-glutaramide
    • 光学拆分3-(对氯苯基) - 戊二酰胺的方法
    • US6051734A
    • 2000-04-18
    • US91520
    • 1998-06-19
    • Alexander Franciscus WildervanckMino Rodolfo CairaJanet Lesley ScottLiugi Renzo NassimbeniRainer ClaussBarratt Robert Dixon Easter
    • Alexander Franciscus WildervanckMino Rodolfo CairaJanet Lesley ScottLiugi Renzo NassimbeniRainer ClaussBarratt Robert Dixon Easter
    • C07C211/27C07C231/20C07C233/11C07C229/00C07C233/00
    • C07C233/11C07C211/27C07C231/20
    • A process for the optical resolution of racemic 3-(p-chlorophenyl)glutaramide (GAM) into its R isomer R--COOH and its S isomer S--COOH, which process includes the steps of either:(1) reacting racemic 3-(p-chlorophenyl)-glutaramide dissolved in a suitable solvent with S-(-)-.alpha.-methylbenzylamine of the formula H.sub.2 N--S'(2) precipitating out of the solution of step (1) R--CO.sub.2.sup.-.H.sub.3.sup.+ N--S';(3) dissolving the precipitate of step (2) in water, with the addition of a suitable acid; and(4) precipitating out of the solution of step (3) R--COOH; or(5) reacting racemic -3-(p-chlorophenyl)-glutaramide dissolved in a suitable solvent with R-(+)-.alpha.-methylbenzylamine of the formula H.sub.2 N--R';(6) precipitating out of the solution of step (5) S--CO.sub.2.sup.-.H.sub.3.sup.+ N--R';(7) dissolving the precipitate of step (6) in water, with the addition of a suitable acid, and(8) precipitating out of the solution of step (7) S--COOH.The R isomer of GAM may be used for the production of R-baclofen and the S isomer of GAM may be used for the production of S-baclofen.
    • PCT No.PCT / GB96 / 03103 Sec。 371日期:1998年6月19日 102(e)1998年6月19日PCT PCT 1996年12月16日PCT公布。 公开号WO97 / 22578 日期1997年6月26日用于将外消旋3-(对氯苯基)戊二酰胺(GAM)旋光拆分成其R异构体R-COOH及其S异构体S-COOH的方法,该方法包括以下步骤:(1) 将溶解在合适溶剂中的外消旋的3-(对氯苯基) - 戊二酰胺与式(1)的溶液中沉淀出的式(II)的S - ( - ) - α-甲基苄胺反应R-CO 2 - .H3 + N-S'; (3)通过加入合适的酸将步骤(2)的沉淀溶解在水中; 和(4)从步骤(3)的溶液中沉淀出R-COOH; 或(5)将溶解在合适溶剂中的外消旋-3-(对氯苯基) - 戊二酰胺与式H2N-R'的R - (+) - α-甲基苄胺反应; (6)从步骤(5)的溶液中沉淀出S-CO 2 -H 3 + N-R'; (7)将步骤(6)的沉淀溶解在水中,加入合适的酸,和(8)从步骤(7)S-COOH的溶液中沉淀出来。 GAM的R异构体可用于生产R-巴氯芬,GAM的S异构体可用于生产S-巴氯芬。