A Stereoselective Cyclization Strategy for the Preparation of γ-Lactams and Their Use in the Synthesis of α-Methyl-β-Proline
作者:Souvik Banerjee、Justin Smith、Jillian Smith、Caleb Faulkner、Douglas S. Masterson
DOI:10.1021/jo3015903
日期:2012.12.7
A straightforward stereoselective and enantiodivergent cyclization strategy for the construction of γ-lactams is described. The cyclization strategy makes use of chiral malonic esters prepared from enantiomerically enriched monoesters of disubstituted malonic acid. The cyclization occurs with the selective displacement of a substituted benzyl alcohol as the leaving group. A Hammett study illustrates