作者:Pradeep Kumar、Mandar S. Bodas
DOI:10.1021/ol006518p
日期:2000.11.1
The acylphosphoranes formed in a sequential manner from the reaction of the silyl ester of O-acyl(aroyl)salicylic acids and (trimethylsilyl)methylenetriphenylphosphorane undergo intramolecular Wittig cyclization on the ester carbonyl to afford the 4H-chromen-4-ones in good to excellent yields.
由O-酰基(芳酰基)水杨酸的甲硅烷基酯与(三甲基甲硅烷基)亚甲基三苯基膦烷的甲硅烷基酯的反应顺序形成的酰基磷光烷在酯羰基上进行分子内的Wittig环化反应,得到良好或优异的4H-铬4--4-产量。