α-Amido sulfones from natural α-amino acids and their reaction with carbon nucleophiles
作者:Marino Petrini、Mirko Seri
DOI:10.1016/j.tet.2005.10.033
日期:2006.1
Amides obtained from N-carbamoyl α-amino acids react with aldehydes in the presence of benzenesulfinic acid to give α-amido sulfones in good yield. These derivatives act as equivalents of N-acylimines in the reaction with nucleophiles leading to the corresponding addition products. The utilization of the lithium enolate of alkyl acetates as a nucleophile allows the preparation of α,β-dipeptides, while
由N-氨基甲酰基α-氨基酸获得的酰胺在苯亚磺酸的存在下与醛反应,以高收率得到α-酰胺基砜。这些衍生物在与亲核试剂的反应中充当N-酰亚胺的等同物,从而导致相应的加成产物。利用乙酸烷基酯的烯醇锂作为亲核试剂可以制备α,β-二肽,而涉及硝基甲基化和Nef转化的两步法导致α,α-二肽的合成。