Preparation and applications of a polymer-supported phosphoryl azide
作者:Yuhua Lu、Richard T. Taylor
DOI:10.1016/j.tetlet.2003.10.066
日期:2003.12
A polymer-supported diphenylphosphoryl azide was prepared. This polymer-supported version of DPPA is useful due to its lower toxicity, moisture tolerance and ease of workup after reaction. The synthetic application of this solid-phase reagent was explored by conversion of a variety of carboxylic acids to urethanes and ureas through Curtius rearrangement reactions. Carboxylic acids bearing different