Novel crystal modifications of (5S)-5-[4-(5-chloro-pyridin-2-yloxy)-piperidine-1-sulfonylmethyl]-5-methyl-imidazolidine-2,4-dione are disclosed together with processes for preparing such modifications, pharmaceutical compositions comprising such a modification, and the use of such a modification in therapy.
Process for producing optically active α-methylcysteine derivative
申请人:Kaneka Corporation
公开号:US08993800B2
公开(公告)日:2015-03-31
The present invention provides a simple industrial process for producing an L- or D-optically active α-methylcysteine derivative or its salt, which is a useful pharmaceutical intermediate, from readily available, inexpensive raw materials. In a process for producing an L- or D-optically active α-methylcysteine derivative or its salt, a racemic N-carbamoyl-α-methylcysteine derivative or its salt is D-selectively cyclized with hydantoinase to produce a D-5-methyl-5-thiomethylhydantoin derivative or its salt and an N-carbamoyl-α-methyl-L-cysteine derivative or its salt, which are then subjected to deprotection of the amino group and the sulfur atom, and hydrolysis.
PROCESS FOR PRODUCING OPTICALLY ACTIVE alpha-METHYLCYSTEINE DERIVATIVE
申请人:KANEKA CORPORATION
公开号:EP1550725A1
公开(公告)日:2005-07-06
The present invention provides a simple industrial process for producing an L- or D-optionally active α-methylcysteine derivative or its salt, which is a useful pharmaceutical intermediate, from readily available, inexpensive raw materials.
In a process for producing an L- or D-optically active α- methylcysteine derivative or its salt, a racemic N-carbamoyl-α- methylcysteine derivative or its salt is D-selectively cyclized with hydantoinase to produce a D-5-methyl-5-thiomethylhydantoin derivative or its salt and an N-carbamoyl-α-methyl-L-cysteine derivative or its salt, which are then subjected to deprotection of the amino group and the sulfur atom, and hydrolysis.
本发明提供了一种简单的工业工艺,可以用容易获得的廉价原料生产 L-或 D-选择活性 α-甲基半胱氨酸衍生物或其盐,这种衍生物是一种有用的医药中间体。
在生产具有 L 或 D 选择活性的 α-甲基半胱氨酸衍生物或其盐的工艺中,外消旋 N-氨基甲酰基-α-甲基半胱氨酸衍生物或其盐与海因酶进行 D 选择性环化,生成 D-5-甲基-5-硫代甲基海因衍生物或其盐和 N-氨基甲酰基-α-甲基-L-半胱氨酸衍生物或其盐,然后对其氨基和硫原子进行脱保护和水解。
Process for producing optically active alpha-methylcysteine derivative
申请人:KANEKA CORPORATION
公开号:EP2287152A2
公开(公告)日:2011-02-23
The present invention relates to a racemic N-carbamoyl-α-methylcysteine derivative represented by formula (1) or its salts:
(wherein R1 represents a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 20 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 20 carbon atoms).