Generation of Acyl Anion Equivalents from Acylphosphonates via Phosphonate−Phosphate Rearrangement: A Highly Practical Method for Cross-Benzoin Reaction
作者:Ayhan S. Demir、Ömer Reis、A. Çiǧdem İǧdir、İlker Esiringü、Serkan Eymur
DOI:10.1021/jo051811u
日期:2005.12.1
Acylphosphonates are potent acyl anion precursors that generate acyl anion equivalents under the promotion of cyanide anion via phosphonate−phosphate rearrangement. These anions readily react with aldehydes to provide cross-benzoin products. In this way it is possible to synthesize a variety of aromatic−aromatic, aromatic−aliphatic, and aliphatic−aromatic benzoins. Moreover the reaction of benzoylphosphonate
酰基膦酸酯是有效的酰基阴离子前体,可通过膦酸酯-磷酸重排在氰化物阴离子的促进下生成酰基阴离子当量。这些阴离子容易与醛反应以提供交叉安息香产物。通过这种方式,可以合成各种芳族-芳族,芳族-脂族和脂族-芳族苯偶姻。此外,苯甲酰基膦酸酯与强力亲电子试剂2,2,2-三氟苯乙酮的反应以高收率提供了相应的醛-酮偶联产物。