Asymmetric Counterion Pair Catalysis: An Enantioselective Brønsted Acid-Catalyzed Protonation
作者:Magnus Rueping、Thomas Theissmann、Sadiya Raja、Jan W. Bats
DOI:10.1002/adsc.200800020
日期:2008.5.5
A new asymmetric Brønstedacid-catalyzedcascadereactioninvolving a 1,4-addition, enantioselective protonation and 1,2-addition has been developed. This organocatalytic cascade not only provides for the first time 3- and 2,3-substituted tetrahydroquinolines and octahydroacridines in good yields with high dia- and enantioselectivities under mild reaction conditions but additionally represents the
Enantioselective Reduction of 3-Substituted Quinolines with a Cyclopentadiene-Based Chiral Brønsted Acid
作者:Weijun Tang、Xiaofang Zhao、Jianliang Xiao
DOI:10.1055/s-0036-1589012
日期:2017.7
Abstract Enantioselective reduction of 3-substituted quinolines has been achieved using a cyclopentadiene-based chiralBrønstedacid as catalyst and Hantzsch ester as hydrogen donor, affording the corresponding tetrahydroquinolines in good enantioselectivities. Enantioselective reduction of 3-substituted quinolines has been achieved using a cyclopentadiene-based chiralBrønstedacid as catalyst and