Asymmetric aldol and alkylation reactions mediated by the “quat” chiral auxiliary (R)-(−)-5-methyl-3,3-dimethyl-2-pyrrolidinone
作者:Stephen G. Davies、Gilles J.-M. Doisneau、Jeremy C. Prodger、Hitesh J. Sanganee
DOI:10.1016/0040-4039(94)85223-5
日期:1994.4
Enolates derived from the N-propionoyl derivative of the “quat” chiralauxiliary (R)-(−)-5-methyl-3,3-dimethyl-2-pyrrolidinone undergo highly stereoselective aldol and alkylation reactions. Removal of the auxiliary has been demonstrated with LiOH, PhCH2OLi, MeOMgBr and LiAlH4 to generate respectively (2R,3R)-3-hydroxy-2-methyl-3-phenylpropionic acid in homochiral form, and with 96% e.e. (S)-2-meth