Synthesis of chiral 5-substituted 2-pyrrolidinones: An unusual one-step transformation
作者:Zhong-Yong Wei、Edward E. Knaus
DOI:10.1016/0040-4039(93)88053-l
日期:1993.7
An efficient methodology for the enantioselective synthesis of γ-lactams, using a one-pot reaction of chiral N-alkoxycarbonyl γ-amino α,β-unsaturated carboxylates with magnesium in methanol, afforded the target chiral compounds in high chemical yield (87–95%) and optical purity (96–99% ee).
An Alternative Formal Synthesis of (S)-(+)-Vigabatrin
作者:Rakesh G. Thorat、Sudhir P. Chaskar、Ramchandra Honparkhe、Arvind K. Aghao、Chinmoy Pramanik
DOI:10.1055/s-0042-1751470
日期:2024.2
An improved synthesis of chirally pure advanced pyrrolidone intermediate of the (S)-(+)-vigabatrin, an antiseizure active pharmaceutical ingredient (API) is reported. The synthesis is developed using commercially available, cheaper amino acid (R)-methionine. Meldrum’s acid served as a two-carbon homologation unit to access the pyrrolidone intermediate in a short synthetic sequence. The sequence to
据报道,一种抗惊厥活性药物成分 (API) ( S )-( + )-氨己烯酸 (S)-(+)-氨己烯酸 (S)-(+)-氨己烯酸 (S)-(+)-氨己烯酸 (S)-(+)- 手性纯高级吡咯烷酮中间体的改进合成。该合成是使用市售的、更便宜的氨基酸 ( R )-蛋氨酸开发的。Meldrum 酸作为二碳同系单元,以短的合成序列获得吡咯烷酮中间体。吡咯烷酮中间体的序列是可扩展的并且避免了有机金属自燃试剂的大规模使用。
Asymmetric synthesis of both enantiomers of vigabatrin®: An approach using methionine as the chiral pool