N-Heterocyclic Carbene-Catalyzed Cascade Reaction Involving the Hydroacylation of Unactivated Alkynes
作者:Akkattu T. Biju、Nathalie E. Wurz、Frank Glorius
DOI:10.1021/ja102130s
日期:2010.5.5
The N-heterocyclic carbene (NHC)-catalyzed hydroacylation of unactivated alkynes to provide alpha,beta-unsaturated ketones is reported. In addition, a rare case of an efficient and selective dually NHC-catalyzed cascade reaction involving the hydroacylation of alkynes and a subsequent intermolecular Stetter reaction allows the formation of chromanones containing a 1,4-diketone moiety.
N-Heterocyclic Carbene Catalyzed Intramolecular Hydroacylation of Activated Alkynes: Synthesis of Chromones
作者:Seenuvasan Vedachalam、Qian-Ling Wong、Biswajit Maji、Jing Zeng、Jimei Ma、Xue-Wei Liu
DOI:10.1002/adsc.201000828
日期:2011.2.11
An organocatalytic intramolecular Stetter-type hydroacylation reaction between an aldehyde and an activated alkyne has been developed. This study induces salicylaldehyde-derived alkyne derivatives to assemble into a series of chromone derivatives using a catalytic amount of thiazolium-based carbene catalyst.