申请人:PROCOS S.P.A
公开号:US20030009055A1
公开(公告)日:2003-01-09
A process for the preparation of gabapentin of formula (I)
1
which comprises:
a) reduction of (1-nitromethyl-cyclohexyl)acetonitrile of formula (II)
2
to give 3-imino-2-aza-spiro[4.5]decan-2-ol of formula (III)
3
b) transformation of compound (III), by alkali treatment, into 2-hydroxy-2-aza-spiro[4.5]decan-3-one of formula (IV)
4
c) reduction of compound (IV) to give 2-aza-spiro[4.5]decan-3-one of
5
d) hydrolysis of compound (V) to gabapentin.
制备加巴喷丁(式I)的方法,包括以下步骤:
a) 将式II的(1-硝基甲基-环己基)乙腈还原,得到式III的3-亚氨基-2-氮杂螺[4.5]癸-2-醇;
b) 通过碱处理将化合物III转化为式IV的2-羟基-2-氮杂螺[4.5]癸-3-酮;
c) 将化合物IV还原,得到式V的2-氮杂螺[4.5]癸-3-酮;
d) 将化合物V水解,得到加巴喷丁。