Uniting Amide Synthesis and Activation by P<sup>III</sup>/P<sup>V</sup>–Catalyzed Serial Condensation: Three-Component Assembly of 2-Amidopyridines
作者:Jeffrey M. Lipshultz、Alexander T. Radosevich
DOI:10.1021/jacs.1c07608
日期:2021.9.15
An organophosphorus (PIII/PV redox) catalyzed method for the three-component condensation of amines, carboxylic acids, and pyridine N-oxides to generate 2-amidopyridines via serial dehydration is reported. Whereas amide synthesis and functionalization usually occur under divergent reaction conditions, here a phosphetane catalyst (together with a mild bromenium oxidant and terminal hydrosilane reductant)
报道了一种有机磷(P III /P V氧化还原)催化胺、羧酸和吡啶N-氧化物三组分缩合通过连续脱水生成 2-氨基吡啶的方法。虽然酰胺合成和官能化通常发生在不同的反应条件下,但此处显示膦烷催化剂(与温和的溴氧化剂和末端氢硅烷还原剂一起)在自动串联催化级联中以化学选择性驱动这两个步骤。在单一有机催化活性中间体的作用下制备和官能化酰胺的能力为高效和模块化制备药物靶标提供了新的可能性。