Resolution of mercaptopropionic acids
    3.
    发明授权
    Resolution of mercaptopropionic acids 失效
    巯基丙酸的分辨率

    公开(公告)号:US4297282A

    公开(公告)日:1981-10-27

    申请号:US90857

    申请日:1979-11-02

    CPC分类号: C07C327/00 C07D207/16

    摘要: This invention relates to a process for the optical resolution of DL-.alpha.-methyl-.beta.-acylthiopropionic acids of the formula [I], ##STR1## wherein R is a lower alkyl group having 1-4 carbon atoms, phenyl or substituted phenyl bearing methyl or chloro radical; a method for the racemization of an optically active .alpha.-methyl-.beta.-acylthiopropionic acid of the formula [Ia], ##STR2## wherein R is as defined above; and a process for the synthesis of captopril of the formula [II], ##STR3## using the D-acid [Ia] as an intermediate. The optically active .alpha.-methyl-.beta.-acylthiopropionic acids are useful as intermediates for the production of medicines, for example, captopril or its congeners.

    摘要翻译: 本发明涉及一种用于光学拆分式[I],其中R是具有1-4个碳原子的低级烷基的式[I],其中R 1是苯基或 取代的含甲基或氯基的苯基; 式[Ia]的光学活性α-甲基-β-酰基硫代丙酸外消旋化的方法,其中R如上定义; 以及使用D-酸[Ia]作为中间体合成式[II],IMAGE [II]的卡托普利的方法。 光学活性α-甲基-β-酰基硫代丙酸可用作生产药物的中间体,例如卡托普利或其同系物。

    Optical resolution of acylthiopropionic acid
    4.
    发明授权
    Optical resolution of acylthiopropionic acid 失效
    酰基硫代丙酸的光学拆分

    公开(公告)号:US4325886A

    公开(公告)日:1982-04-20

    申请号:US209680

    申请日:1980-11-24

    CPC分类号: C07C327/00

    摘要: A process for the optical resolution of DL-.alpha.-methyl-.beta.-acylthiopropionic acid, which comprises contacting a DL-.alpha.-methyl-.beta.-acylthiopropionic acid of the formula, ##STR1## wherein R.sub.1 is acetyl or benzoyl which may be substituted with a C.sub.1 -C.sub.3 alkyl or a halogen atom, with an optically active amine of the formula, ##STR2## wherein R.sub.2 is methyl, isopropyl or isobutyl, to form diastereoisomeric salts, subjecting the formed diastereoisomeric salts to the fractional crystallization in a solvent to separate the D-acid salt from the L-acid salt, and then contacting the individual diastereoisomeric salt with acid to give D-.alpha.-methyl-.beta.-acylthiopropionic acid and L-.alpha.-methyl-.beta.-acylthiopropionic acid, the former being useful as an intermediate for synthesizing captopril useful as an antihypertensive agent.

    摘要翻译: 用于DL-α-甲基-β-酰基硫代丙酸的光学拆分的方法,其包括使下式的DL-α-甲基-β-酰基硫代丙酸:其中R 1是乙酰基或可以被 C 1 -C 3烷基或卤素原子,与下式的光学活性胺,其中R 2是甲基,异丙基或异丁基,形成非对映异构盐,使形成的非对映异构体盐在溶剂中进行分级结晶以分离 来自L-酸盐的D-酸盐,然后将各个非对映异构体盐与酸接触,得到D-α-甲基-β-酰基硫代丙酸和L-α-甲基-β-酰基硫代丙酸,前者可用作 用作合成用作抗高血压药的卡托普利的中间体。

    Racemization of an .alpha.-methyl-.beta.-acylthiopropionic acid
    5.
    发明授权
    Racemization of an .alpha.-methyl-.beta.-acylthiopropionic acid 失效
    α-甲基-β-酰基硫代丙酸的外消旋化

    公开(公告)号:US4411836A

    公开(公告)日:1983-10-25

    申请号:US279706

    申请日:1981-07-02

    CPC分类号: C07C327/00 C07D207/16

    摘要: This invention relates to a process for the optical resolution of DL-.alpha.-methyl-.beta.-acylthiopropionic acids of the formula [I], ##STR1## wherein R is a lower alkyl group having 1-4 carbon atoms, phenyl or substituted phenyl bearing methyl or chloro radical; a method for the racemization of an optically active .alpha.-methyl-.beta.-acylthiopropionic acid of the formula [Ia], ##STR2## wherein R is as defined above; and a process for the synthesis of captopril of the formula [II], ##STR3## using the D-acid [Ia] as an intermediate.The optically active .alpha.-methyl-.beta.-acylthiopropionic acids are useful as intermediates for the production of medicines, for example, captopril or its congeners.

    摘要翻译: 本发明涉及一种用于光学拆分式[I],其中R是具有1-4个碳原子的低级烷基的式[I],其中R 1是苯基或 取代的含甲基或氯基的苯基; 式[Ia]的光学活性α-甲基-β-酰基硫代丙酸外消旋化的方法,其中R如上定义; 以及使用D-酸[Ia]作为中间体合成式[II],IMAGE [II]的卡托普利的方法。

    Process for producing 3-(3,4-dihydroxyphenyl) serine
    6.
    发明授权
    Process for producing 3-(3,4-dihydroxyphenyl) serine 失效
    制备3-(3,4-二羟基苯基)丝氨酸的方法

    公开(公告)号:US4562263A

    公开(公告)日:1985-12-31

    申请号:US614246

    申请日:1984-05-25

    摘要: A process for producing racemic or optically active threo- or erythro-3-(3,4-dihydroxyphenyl)serine which comprises phthaloylating the amine group of a racemic or optically active threo- or erythro-3-(3,4-dihydroxyphenyl)serine derivative to yield a racemic or optically active threo- or erythro-N-phthaloyl-3-(3,4-dihydroxyphenyl)serine derivative and removing the phthaloyl group from the racemic or optically active threo- or erythro-N-phthaloyl-3-(3,4-dihydroxyphenyl)-serine to yield the racemic or optically active threo- or erythro-3-(3,4-dihydroxyphenyl)serine.

    摘要翻译: 制备外消旋或光学活性的苏氨酸或赤式3-(3,4-二羟基苯基)丝氨酸的方法,其包括将外消旋或光学活性的苏氨酸或赤式3-(3,4-二羟基苯基)丝氨酸的胺基苯甲酰化 衍生物,得到外消旋或光学活性的苏氨酸或赤式-N-邻苯二甲酰基-3-(3,4-二羟基苯基)丝氨酸衍生物,并从外消旋或光学活性的苏氨酸或赤式-N-邻苯二甲酰基-3- (3,4-二羟基苯基) - 丝氨酸,得到外消旋或光学活性的苏氨酸或赤式3-(3,4-二羟基苯基)丝氨酸。

    Process for producing threo-3-(3,4-dihydroxyphenyl)serine
    7.
    发明授权
    Process for producing threo-3-(3,4-dihydroxyphenyl)serine 失效
    制备3-(3,4-二羟基苯基)丝氨酸的方法

    公开(公告)号:US4480109A

    公开(公告)日:1984-10-30

    申请号:US455254

    申请日:1983-01-03

    CPC分类号: C07D317/60

    摘要: A process for producing an optically active threo-3-(3,4-dihydroxyphenyl)serine represented by the formula ##STR1## which is useful as a remedy for peripheral orthostatic hypotension or as an antidepressant, which process comprises treating threo-3-(3,4-methylenedioxyphenyl)serine or an N-carbobenzoxy derivative thereof represented by the formula ##STR2## wherein A represents a hydrogen atom or a carbobenzoxy group, with a Lewis acid to form threo-3-(3,4-dihydroxyphenyl)serine or an N-carbobenzoxy derivative thereof represented by the formula ##STR3## wherein A is as defined above, and, if A is a carbobenzoxy group, catalytically reducing the resulting compound of formula [2]; a racemic or optically active threo-N-carbobenzoxy-3-(3,4-methylenedioxyphenyl)serine represented by the formula ##STR4## which is a novel compound useful as an intermediate in the above synthesis; and a process for producing said novel compound.

    摘要翻译: 用于制备由式 [1]表示的光学活性的苏氨酰-3-(3,4-二羟基苯基)丝氨酸的方法,其可用作周围直立性低血压的补救剂或作为抗抑郁药,该方法包括将苏氨酸 - 由式[IMAGE] [3]表示的3-(3,4-亚甲二氧基苯基)丝氨酸或N-苄氧羰基衍生物,其中A表示氢原子或苯甲酰氧基,与路易斯酸形成苏-3-(3 ,4-二羟基苯基)丝氨酸或其通式为“IMAGE”[2]所示的N-苄氧羰基衍生物,其中A如上所定义,如果A为苄氧羰基,则催化还原所得的式[2]化合物。 由上式合成中可用作中间体的新化合物,由式[IMAGE] [3“表示的外消旋或光学活性的苏氨酰-N-苄氧羰基-3-(3,4-亚甲二氧基苯基)丝氨酸; 以及制备所述新型化合物的方法。