Relay catalysis: combined metal catalyzed oxidation and asymmetric iminium catalysis for the synthesis of Bi- and tricyclic chromenes
作者:Magnus Rueping、Jeremy Dufour、Modhu Sudan Maji
DOI:10.1039/c2cc00129b
日期:——
A catalytic asymmetric oxidative iminium-allenamine cascade allows the use of propargyl alcohols as stable substrates and yields valuable chiral bicyclic 4H-chromenes. A subsequent Michael addition-condensation domino reaction provides complex tricyclic 4H-chromenes in a highly enantioselective fashion.
催化不对称氧化亚胺-亚胺胺级联反应允许使用炔丙醇作为稳定的底物,并产生有价值的手性双环4H-色烯。随后的迈克尔加成-缩合多米诺反应以高度对映选择性的方式提供了复杂的三环4H-色烯。