Kumar P, Bodas MS
Division of Organic Chemistry: Technology, National Chemical Laboratory, Pune 411008, India.
Org Lett. 2000 Nov 30;2(24):3821-3. doi: 10.1021/ol006518p.
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）水杨酸的硅酯与（三甲基硅基）亚甲基三苯基磷烷反应依次形成的酰基磷叶立德，在酯羰基上发生分子内维蒂希环化反应，以良好至优异的产率得到4H-色烯-4-酮。
