Chiral amines are important as medicines or agrochemicals. They are often assembled by nucleophilic addition to corresponding compounds featuring C=N bond. Pre-made organometallics are typical nucleophiles in this reaction. In this work, we describe asymmetric reductive alkylation of imines with alkenes. Hydrozirconation of these alkenes generated organozirconium species in situ. The transformation
desirable as starting materials because they are readily accessible in large quantities, but the enantioselective intermolecular reductivecoupling of unactivated alkenes with imines is challenging. In this paper, we report a method for nickel-catalyzed intermolecular reductivecoupling reactions between aliphatic alkenes and imines to yield chiral amines with excellent enantioselectivities and good linear
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.