The Catalytic Mannich Reaction of 1,1-Difluoro-2-trialkyl(aryl)silyl-2-trimethyl-silyloxyethenes: Preparation of β-Amino Acid Derivatives
作者:Woo Jin Chung、Masaaki Omote、John T. Welch
DOI:10.1021/jo050953l
日期:2005.9.1
Catalytic Mannich reactions of 1,1-difluoro-2-trialkyl(aryl)silyl-2-trimethylsilyloxyethenes (3) with a variety of sulfonylimines were utilized for the preparation of α,α-difluoro-β-amino acid derivatives (7). The influence of the Lewis acid on the reaction was examined. Methods for the conversion of α,α-difluoroacylsilanes to α,α-difluorocarboxylic acids were also explored.
1,1-二氟-2-三烷基(芳基)甲硅烷基-2-三甲基甲硅烷基氧乙烯的催化曼尼希反应(3)与多种磺酰亚胺反应被用于制备α,α-二氟-β-氨基酸衍生物(7)。研究了路易斯酸对反应的影响。还探索了将α,α-二氟酰基硅烷转化为α,α-二氟羧酸的方法。