N-Heterocyclic carbene-catalyzed domino hydroacylation/Stetter reactions of salicyl alkynylphosphonates and aromatic aldehydes
作者:Zhen-Qiang Wang、Ying Wang、Deqing Shi
DOI:10.3998/ark.5550190.p008.158
日期:——
Dicarbonyl compounds 2 carrying a phosphonate group were obtained by utilizing a dually N-heterocyclic carbene (NHC) catalyzed dominoreaction involving the intramolecular hydroacylation of salicylalkynylphosphonates 1 and a subsequent intermolecular Stetterreaction with aromaticaldehyde at room temperature. In addition, 2 can also be applied for the synthesis of benzopyranopyrrole carrying a phosphonate
N-Heterocyclic Carbene Catalyzed Intramolecular Hydroacylation of Alkynylphosphonates
作者:Deqing Shi、Zhenqiang Wang、Zhihua Yu、Ying Wang
DOI:10.1055/s-0031-1290976
日期:2012.5
applied in the one-pot synthesis of benzopyranopyridine phosphonates in moderated yields. Two exocyclic and endocyclic olefin tautomers of chromone phosphonates were obtained in good to excellent yields at different temperatures by utilizing an N-heterocyclic carbene catalyst in the intramolecular reactions between the formyl group and alkynylphosphonates. The exocyclicolefins can isomerize to the endocyclic