申请人:Ohishi Takahiro
公开号:US20060051846A1
公开(公告)日:2006-03-09
A process for easily producing an L-α-methylcysteine derivative or its salt, which is useful as a drug intermediate, from a cheap easily procurable raw material through an enzymatic D-stereoselective hydrolysis of racemic 5-halomethyl-5-methyl-hydantoin. L-α-methylcysteine derivative or its salt is produced by converting racemic 5-halomethyl-5-methylhydantoin to L-5-halomethyl-5-methylhydantoin through an enzymatic D-stereoselective hydrolysis, reacting the L-5-halomethyl-5-methylhydantoin with a sulfurizing agent into L-5-methyl-5-thiomethylhydantoin and hydrolyzing the L-5-methyl-5-thiomethylhydantoin.
一种通过酶法 D-立体选择性水解外消旋 5-卤甲基-5-甲基海因,从廉价易购原料中轻松生产 L-α-甲基半胱氨酸衍生物或其盐的工艺,该衍生物可用作药物中间体。L-α-甲基半胱氨酸衍生物或其盐是通过酶 D-立体选择性水解将外消旋 5-卤甲基-5-甲基海因转化为 L-5-卤甲基-5-甲基海因,将 L-5-卤甲基-5-甲基海因与硫化剂反应生成 L-5-甲基-5-硫甲基海因,再将 L-5-甲基-5-硫甲基海因水解而制得。