Synthesis of 5-substituted-3,3-dimethyl-2-pyrrolidinones: “quat” chiral auxiliaries
作者:Stephen G. Davies、Gilles J.-M. Doisneau、Jeremy C. Prodger、Hitesh J. Sanganee
DOI:10.1016/0040-4039(94)85222-7
日期:1994.4
The synthesis of a series of chiral auxiliaries, 5-substituted-3,3-dimethyl-2-pyrrolidinones, “quats”, from L-glutamic acid is described. Efficient regeneration of the chiral auxiliaries from their N-pivaloyl derivatives is readily achieved with LiOH in THF-water at 20°C.
描述了由L-谷氨酸合成一系列手性助剂5-取代的3,3-二甲基-2-吡咯烷酮,“季铵盐”。用LiOH在20°C的THF水溶液中,可以很容易地从其N-新戊酰基衍生物中高效再生手性助剂。