A powerful synergistic effect for highly efficient diastereo- and enantioselective phase-transfer catalyzed conjugate additions
作者:Ming-Qing Hua、Lian Wang、Han-Feng Cui、Jing Nie、Xiao-Ling Zhang、Jun-An Ma
DOI:10.1039/c0cc04321d
日期:——
An efficient, catalytic, diastereo- and enantioselective conjugate addition of N-(diphenylmethylene)glycine tert-butyl ester to β-aryl substituted enones was realized in the presence of 1 mol% of newly desired dinuclear N-spiro-ammonium salts, affording functionalized α-amino acid derivatives in 57–98% yields with high diastereoselectivity (up to 99 : 1 dr) and enantioselectivity (up to 96.5 : 3.5 er).
在新型二核N-螺旋铵盐的存在下,成功实现了N-(二苯甲烯)甘氨酸叔丁基酯与β-芳基取代的烯酮进行高效的催化非对映选择性和对映选择性的结合加成反应,生成功能化的α-氨基酸衍生物,其产率在57%到98%之间,具有高非对映选择性(高达99 : 1 dr)和对映选择性(高达96.5 : 3.5 er)。