Hydrocarbon substituted pyrrolidinones, intermediates therefor, and
申请人:Merck Sharp & Dohme Ltd.
公开号:US04925867A1
公开(公告)日:1990-05-15
Compounds of formula (I) and pharmaceutically acceptable acid addition salts thereof: ##STR1## wherein R represents a hydrocarbon group, X represents oxygen or sulphur, and R and --NH.sub.2 are cis; are of use in the treatment and/or prevention of neurodegenerative disorders, and are also useful as anticonvulsant agents and muscle relaxants.
A short and efficient synthesis of the NMDA glycine site antagonist: (3R,4R)-3-amino-1-hydroxy-4-methyl pyrrolidin-2-one (L-687,414) is described. (C) 2008 Elsevier Ltd. All rights reserved.
Routes to 4-substituted analogues of the glycine/NMDA antagonist HA-996. Enantioselective synthesis of (3R,4R) 3-amino-1-hydroxy-4-methyl-2-pyrrolidinone (L-687, 414).
作者:Michael Rowley、Paul D. Leeson、Brian J. Williams、Kevin W. Moore、Raymond Baker
DOI:10.1016/s0040-4020(01)88493-3
日期:1992.1
Glycine anion (4) and glycine cation (8) synthons are used in efficient syntheses of 4-substituted analogues of HA-966 (1). A stereospecific route to cis derivatives involves hydrogenation of examines such as 16. Introduction of a chiral auxiliary leads to an enantioselective synthesis of 2a (L-687,414).
4-Methyl and 4-ethyl substituted pyrrolidin-2-ones