Organocatalyzed Cascade Aza-Michael/Aldol Reaction for Atroposelective Construction of 4-Naphthylquinoline-3-carbaldehydes
作者:Jing Zhang、Yong Xu、Zhiming Wang、Rong Zhong、Yurong Wang
DOI:10.1021/acs.joc.1c00163
日期:2021.3.5
An organocatalyzedcascade aza-Michael/Aldol reaction of alkynals with N-(2-(1-naphthoyl)phenyl)benzenesulfonamides has been disclosed. In the presence of a secondary amine catalyst, this method enables the construction of a series of axially chiral 4-naphthylquinoline-3-carbaldehydes in yields of up to 97% with enantioselectivities of up to 96%. Several further transformations of the synthesized products
An atroposelective Friedländer heteroannulation reaction of 2-aminoaryl ketones with α-methylene carbonyl derivatives has been developed for the first time with chiral phosphoric acid as an efficient organocatalyst. The desired enantioenriched axially chiral polysubstituted 4-arylquinoline architectures were prepared with good to high yields and enantioselectivities (up to 94% yield and up to 97% ee)