Asymmetric Formation of Quaternary Centers through Aza-Annulation of Chiral β-Enamino Amides with Acrylate Derivatives
作者:Petr Benovsky、Gregory A. Stephenson、John R. Stille
DOI:10.1021/ja9729591
日期:1998.3.1
active primary amine, either (R)-α-methylbenzylamine or α-amino esters, generated the corresponding optically active tetrasubstituted secondary enamine, in which the enamine tautomer was stabilized through conjugation with an amide carbonyl. Treatment of the intermediate enamine with acryloyl chloride, acrylic anhydride, or sodium acrylate/ethyl chloroformate resulted in aza-annulation to give the corresponding