作者:Zhang, Yuting、Sun, Lu、Xu, Zhilong、Tan, Tian、Wang, Zhiqian
DOI:10.1021/acs.orglett.4c01995
日期:——
promoted by Lewis acids or Brønsted acids. In this work, a novel acylation of arenes with a highly electrophilic acylphosphonium salt was developed. The alkylation of the phosphorus atom in acylphosphines generated a neutral trivalent phosphine as a good leaving group and triggered the high electrophilicity of the acylphosphonium salt. Using acylphosphonium salts, 38 examples of acylations of arenes
弗里德尔-克来福特酰化反应通常由路易斯酸或布朗斯台德酸促进。在这项工作中,开发了一种用高亲电子酰基鏻盐对芳烃进行酰化的新型方法。酰基膦中磷原子的烷基化生成中性三价膦作为良好的离去基团,并引发酰基鏻盐的高亲电性。使用酰基鏻盐,实现了芳烃、醇、苯酚、胺、硫醇甚至聚苯乙烯的 38 个酰化实例。通过31 P核磁共振监测芳烃的酰化并揭示了酰基鏻中间体的存在。酰基鏻盐的亲电能力按以下一系列受控反应排序:AcPR + ≈ AcOTf > AcI > AcCl。