Catalytic enantioselective addition of terminal 1,3-diynes to N-sulfonyl aldimines: access to chiral diynylated carbinamines
作者:Tian-Lin Liu、Heng-Xia Zhang、Yan Zheng、Qingwei Yao、Jun-An Ma
DOI:10.1039/c2cc37290h
日期:——
An efficient method for the asymmetric synthesis of chiral diynylated carbinamines is described. The direct catalytic enantioselective addition of terminal 1,3-diynes to N-sulfonyl aldimines proceeded smoothly under mild reaction conditions to produce diynylated carbinamines in up to 98% yield and 99% ee.
Asymmetric Enynylation of<i>N</i>-Sulfonyl Aldimines Catalyzed by Zn-BINOL Complexes
作者:Zhen-Yan Yang、Tian-Lin Liu、Yan Zheng、Shen Li、Jun-An Ma
DOI:10.1002/ejoc.201500400
日期:2015.6
An efficient enynylation of N-sulfonyl aldimines is described herein. In the presence of Zn-BINOLcomplexes, catalytic enantioselective addition reactions of terminal 3-en-1-ynes to N-sulfonyl aldimines proceed smoothly to produce enynylated carbinamines in up to 96 % yield and 95 % ee. The adducts are versatile synthetic intermediates that readily undergo Pauson–Khand cycloaddition reactions to give