作者:Samuel Braverman、Marina Cherkinsky、E.V.K Suresh Kumar、Hugo E Gottlieb
DOI:10.1016/s0040-4020(00)00360-4
日期:2000.6
competition between 1,2- vs. 1,3-elimination and nucleophilic substitution. Favorskiirearrangement was the preferred process, but in those cases where electronic or steric effects were present, nucleophilic substitution became dominant. No evidence of ketene formation was detected. The mechanism of formation of the various rearrangement products is discussed.
We report a highly regioselective three-componentcouplingreaction of styrene, CO gas, and an amine compound to synthesize multisubstituted α,β-unsaturated amides, which involves a palladium-catalyzed sequential 1,4-palladium migration, C(sp2)–H activation, carbonylation, and amination. Salient features of this strategy include the use of 1 atm of CO, excellent stereochemistry, and good functional