2-Carboxythioester-1,3-dithiane: A Functionalized Masked Carbonyl Nucleophile for the Organocatalytic Enantioselective Michael Addition to Enones
作者:Maurizio Benaglia、Elisabetta Massolo、Davide Brenna、Franco Cozzi、Laura Raimondi、Nicoletta Gaggero
DOI:10.1055/s-0036-1588306
日期:——
An S-(2,2,2-trifluoroethyl) 1,3-dithiane-2-carbothioate has been successfully employed as acyl anion synthon in the organocatalytic enantioselective addition to enones promoted by quinine- and quinidine-derived tertiary/primary diamines. By proper selection of a co-catalyst and by optimization of the reaction parameters, convenient experimental conditions were found that allowed to obtain the highly
S-(2,2,2-trifluoroethyl) 1,3-dithiane-2-carbothioate 已成功用作酰基阴离子合成子,用于由奎宁和奎尼丁衍生的叔/伯二胺促进的烯酮的有机催化对映选择性加成。By proper selection of a co-catalyst and by optimization of the reaction parameters, convenient experimental conditions were found that allowed to obtain the highly functionalized products in up to 90% yield and 98% ee in short reaction times. 这些具有选择性去除功能的化合物被证明是通用的合成中间体,可以在不破坏分子立体化学完整性的情况下转化为不同的衍生物。