Phosphine-Based Redox Catalysis in the Direct Traceless Staudinger Ligation of Carboxylic Acids and Azides
作者:Andrew D. Kosal、Erin E. Wilson、Brandon L. Ashfeld
DOI:10.1002/anie.201206533
日期:2012.11.26
Redox catalysis: Aryl amides, imides, lactams, and dipeptides are obtained through a direct Staudinger ligation mediated by phosphine‐based redox catalysis (see scheme). Mechanistic studies indicate the involvement of a phosphonium carboxylate intermediate that leads to a 1,3‐acyl migration and thus results in CN bond formation.
氧化还原催化:芳基酰胺,酰亚胺,内酰胺和二肽是通过基于膦的氧化还原催化(见方案)介导的Staudinger直接连接获得的。机理研究表明,羧酸intermediate中间体的参与会导致1,3-酰基迁移,从而导致形成CN键。