An intermolecular radical addition, using photoredox catalysis, to allenamides and allencarbamates is reported. This transformation synthesizes N-acyl-N’-aryl-N,N’-allylaminals, and proceeds by a conjugated N-acyliminium intermediate that previously has principally been generated by electrophilic activation methods. The radical adds to the central carbon of the allene giving a conjugated N-acyliminium that undergoes nucleophilic addition by arylamines and alcohols.
本研究报告介绍了一种利用光氧化催化的分子间自由基加成法,可生成烯酰胺类和烯酰胺类化合物。这种转化可合成 N-酰基-N'-芳基-N,N'-烯丙基氨基化合物,并通过共轭 N-酰亚胺中间体进行。该自由基与烯烃的中心碳相加,生成共轭 N-酰亚胺,该共轭 N-酰亚胺可与芳基胺和醇发生亲核加成反应。