Asymmetric Synthesis of Functionalized Cyclopentanones via a Multicatalytic Secondary Amine/<i>N</i>-Heterocyclic Carbene Catalyzed Cascade Sequence
作者:Stephen P. Lathrop、Tomislav Rovis
DOI:10.1021/ja905342e
日期:2009.9.30
one-pot, asymmetric multicatalytic formal [3+2] reaction between 1,3-dicarbonyls and alpha,beta-unsaturated aldehydes is described. The multicatalytic process involves a secondaryamine catalyzed Michael addition followed by a N-heterocycliccarbene catalyzed intramolecular crossed benzoin reaction to afford densely functionalized cyclopentanones with high enantioselectivities. The reaction proceeds