Enantioselective synthesis of γ-aminobutyric acid derivatives by Ni(II)-catalyzed reaction of diethyl malonate with nitroalkenes
摘要:
A new synthetic approach to (3R)-4-amino-3-methylbutyric acid and [(4R)-2-oxo-4-phenylpyrrolidin-1-yl]acetamide [(R)-phenotropil] has been developed. Asymmetric center with a required configuration has been generated via enantioselective addition of diethyl malonate to 1-nitropropene and beta-nitrostyrene, catalyzed by Ni(II) complexes with (R,R)- and (S,S)-N,N'-dibenzylcyclohexane-1,2-diamine.
N-Carbamoylmethyl-4-(R)-Phenyl-2-Pyrrolidinone, Method of its Preparation and Pharmaceutical Use
申请人:Veinberg Grigory
公开号:US20100022784A1
公开(公告)日:2010-01-28
The invention relates to the R-enantiomer of N-carbamoylmethyl-4-phenyl-2-pyrrolidinone (R-Carphedon) of pharmacological value. The method of its preparation includes the N-alkylation of 4(R)-phenyl-2-pyrrolidinone with ethyl bromoacetate in the presence of a strong base and the treatment of intermediate N-ethoxycarbonylmethyl-4(R)-phenyl-2-pyrrolidinone with ammonia.
N-Carbamoylmethy1-4-(R)-phenyl-2-pyrrolidinone, method of its preparation and pharmaceutical use
申请人:Veinberg Grigory
公开号:US09102615B2
公开(公告)日:2015-08-11
The invention relates to the R-enantiomer of N-carbamoylmethyl-4-phenyl-2-pyrrolidinone (R-Carphedon) of pharmacological value. The method of its preparation includes the N-alkylation of 4(R)-phenyl-2-pyrrolidinone with ethyl bromoacetate in the presence of a strong base and the treatment of intermediate N-ethoxycarbonylmethyl-4(R)-phenyl-2-pyrrolidinone with ammonia.
N-carbamoylmethyl-4-(R)-phenyl-2-pyrrolidinone, method of its preparation and pharmaceutical use
申请人:Joint Stock Company (JSC) “OLAINFARM”
公开号:US09382203B2
公开(公告)日:2016-07-05
The invention relates to the R-enantiomer of N-carbamoylmethyl-4-phenyl-2-pyrrolidinone (R-Carphedon) of pharmacological value. The method of its preparation includes the N-alkylation of 4(R)-phenyl-2-pyrrolidinone with ethyl bromoacetate in the presence of a strong base and the treatment of intermediate N-ethoxycarbonylmethyl-4(R)-phenyl-2-pyrrolidinone with ammonia.