J Org Chem. 2014 Feb 7;79(3):1368-76. doi: 10.1021/jo402768r.
Imines and carboxylic acids have been directly coupled using propylphosphonic acid anhydride and NEt(i-Pr)2 to give N-acyliminium ions, which were intramolecularly trapped with oxygen, nitrogen, sulfur, and carbon nucleophiles to provide a wide range of structurally diverse heterocycles.
亚胺和羧酸已通过丙基亚磷酰酸酐和 NEt(i-Pr)2 直接偶联，得到 N-酰亚胺离子，这些离子被氧、氮、硫和碳亲核试剂进行分子内捕获，提供了广泛的结构多样的杂环。
