Enantiomerically Pure α-Alkylidene β-Amino Esters from Asymmetric Addition of Metal Dienolates to <i>N</i>-Sulfinylimines
作者:J. L. García Ruano、I. Fernández、M. del Prado Catalina、J. A. Hermoso、J. Sanz-Aparicio、M. Martínez-Ripoll
DOI:10.1021/jo972303q
日期:1998.10.1
these mixtures followed by isomerization of the double bond with Na(2)CO(3) allowed the synthesis of the optically pure (E)-alpha-ethylidene-beta-amino ester 10 in quite high overall yield. The addition of the lithium dienolate to sulfinylimines in the absence of the Lewis catalysts yielded mixtures containing important amounts of the optically pure N-arylsulfinyl alpha-ethylidene-beta-amino esters