N-Heterocyclic carbene-catalysed intermolecular Stetter reactions of acetaldehyde
作者:Sun Min Kim、Ming Yu Jin、Mi Jin Kim、Yan Cui、Young Sug Kim、Liqiu Zhang、Choong Eui Song、Do Hyun Ryu、Jung Woon Yang
DOI:10.1039/c0ob01178a
日期:——
A facile method for the intermolecular Stetter reaction of various Michael acceptors with acetaldehyde as a biomimetic acylanion source was realized using N-heterocyclic carbene catalysis. This catalytic system has also been applied to the enantioselective Stetter reaction and resulted in moderate to good enantioselectivities for the corresponding Stetter products.
The Stetter reaction employs synthetically useful umpolung reactivity to provide catalytic access to 1,4‐bifunctional molecules. The first enzymatic 1,4‐addition is described, with the ThDP‐dependent enzyme PigD, which makes the challenging asymmetric intermolecular Stetter reaction accessible.