Asymmetric alkylations using SuperQuat auxiliaries—an investigation into the synthesis and stability of enolates derived from 5,5-disubstituted oxazolidin-2-ones
作者:Steven D. Bull、Stephen G. Davies、Simon Jones、Hitesh J. Sanganee
DOI:10.1039/a809715a
日期:——
Studies on the alkylation of enolates derived from a range of N-acyl-5,5-dimethyloxazolidin-2-ones and N-acyl-5,5-diphenyloxazolidin-2-ones reveal that high yields and high diastereoselectivities are best obtained when homochiral 4-isopropyl-5,5-dimethyloxazolidin-2-one is employed as a chiral auxiliary.
对多种N-酰基-5,5-二甲基噁唑啉-2-酮和N-酰基-5,5-二苯基噁唑啉-2-酮衍生的烯醇负离子的烷基化研究表明,当使用手性辅助剂4-异丙基-5,5-二甲基噁唑啉-2-酮时,可以获得高产率和高的立体选择性。