申请人:MERRELL DOW FRANCE ET CIE
公开号:EP0116257A1
公开(公告)日:1984-08-22
4-Amino-5-hexenoic acid is prepared by:
(a) reacting 5-oxo-2-pyrrolidine-acetonitrile with hydrogen and dimethylamine in the presence of a palladium catalyst to form N,N-dimethyl-2-[5'-oxo-2'-pyrrolidine] ethylamine:
(b) oxidizing N,N-dimethyl-2-[5'-oxo-2'-pyrrolidine]-ethylamine to produce the corresponding N-oxide derivative;
(c) pyrolysis of the N-oxide derivative to form 5-vinyi-2-pyrrolidinone;
optionally, separating, N,N-dimethyl-2-[5'-oxo-2'-pyrrolidine]ethylamine by-product from the 5-vinyl-2-pyrrolidinone product; and
(d) hydrolyzing 5-vinyl-2-pyrrolidinone to form 4-amino-5-hexenoic acid.
4- 氨基-5-己烯酸的制备方法如下
(a) 在钯催化剂存在下,5-氧代-2-吡咯烷乙腈与氢和二甲胺反应生成 N,N-二甲基-2-[5'-氧代-2'-吡咯烷]乙胺:
(b) 氧化 N,N-二甲基-2-[5'-氧代-2'-吡咯烷]乙胺,生成相应的 N-氧化物衍生物;
(c) 高温分解 N-氧化物衍生物,生成 5-乙烯基-2-吡咯烷酮;
选择性地从 5-乙烯基-2-吡咯烷酮产品中分离 N,N-二甲基-2-[5'-氧代-2'-吡咯烷]乙胺副产物;以及
(d) 水解 5-乙烯基-2-吡咯烷酮,生成 4-氨基-5-己烯酸。