申请人:——
公开号:US20030120102A1
公开(公告)日:2003-06-26
Method for the preparation of (S)-2-acetylthio-3-phenylpropionic acid, wherein (R)-2-bromo-3-phenylpropionic acid is contacted with thioacetic acid and an organic base, for example triethylamine. Preferably the base is metered to a mixture of (R)-2-bromo-3-phenylproprionic acid and thioacetic acid at a temperature between −10° C. and +30° C.
(R)-2-bromo-3-phenylpropionic acid is preferably prepared starting from D-phenylalanine, sodium nitrite, HBr and a bromide salt, in an aqueous solution at a temperature between −10 and 30° C., and subsequently without isolation converted into (S)-2-acetylthio-3-phenylpropionic acid. The (S)-2-acetylthio-3-phenylpropionic acid obtained can be used in the preparation of pharmaceuticals, in particular ACE inhibitor such as Omapatrilat.
制备(S)-2-乙酰硫-3-苯丙酸的方法,其中(R)-2-溴-3-苯丙酸与硫乙酸和有机碱(例如三乙胺)接触。最好将碱计量到(R)-2-溴-3-苯丙酸和硫乙酸的混合物中,在温度在-10°C和+30°C之间。最好从D-苯丙氨酸、亚硝酸钠、HBr和溴化盐开始制备(R)-2-溴-3-苯丙酸,溶于水溶液中,在温度在-10°C和30°C之间,并随后在不进行分离的情况下转化为(S)-2-乙酰硫-3-苯丙酸。获得的(S)-2-乙酰硫-3-苯丙酸可用于制备药物,特别是ACE抑制剂,如奥马帕曲。