作者:Ronald Grigg、James Kemp、John F. Malone、Shuleewan Rajviroongit、Tangthongkum Anant
DOI:10.1016/s0040-4020(01)86043-9
日期:1988.1
Imines of α-aminoacidesters undergo regiospecific Michael addition to methyl acrylate or acrylonitrile in good yield in benzene at 25°C catalysed by benzyItrimethyl ammonium methoxide (BTAM). The Michael adducts cyclise to a mixture of two stereoisomeric polysubstituted proline esterderivatives in the presence of 1 mol. of BTAM. Mechanistic studies, involving chiral intermediates, show this cyclisation