发明授权
US4376213A Method for optical resolution of 2-(4-chlorophenyl)-3-methylbutanoic acid 失效
2-(4-氯苯基)-3-甲基丁酸的光学拆分方法

Method for optical resolution of 2-(4-chlorophenyl)-3-methylbutanoic acid
摘要:
A method for optical resolution of 2-(4-chlorophenyl)-3-methylbutanoic acid, which comprises crystallizing out the salt between (+) or (-)-2-(4-chlorophenyl)-3-methylbutanoic acid and diethylamine in a molar proportion of 2:1 predominantly from a super-saturated solution of the salt of 2-(4-chlorophenyl)-3-methylbutanoic acid with diethylamine, collecting the crystallized salt and decomposing the collected salt under acidic conditions to obtain the corresponding optically active acid.
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