Direct Catalytic Enantioselective Vinylogous Aldol Reaction of α-Branched Enals with Isatins
作者:Carlo Cassani、Paolo Melchiorre
DOI:10.1021/ol302711w
日期:2012.11.2
The directvinylogousaldolreaction of α-substituted α,β-unsaturated aldehydes with isatins is described. The chemistry provides easy access to valuable 3-substituted 3-hydroxyoxindole derivatives with high stereocontrol and perfect γ-site selectivity. Preliminary mechanistic studies suggest that, depending on the nature of the α-branched enal substituents, two divergentreaction mechanisms can be