Ph3P-I2 mediated aryl esterification with a mechanistic insight
摘要:
In order to better understand the reaction mechanism and to obtain optimal conditions, the Ph3P-I-2/Et3N mediated aryl esterification reaction was thoroughly investigated. Using a specific reagent addition sequence, the reaction proceeds remarkably well especially with acidic substrates. P-31 NMR studies revealed that the formation of an aryloxyphosphonium salt is crucial in governing the reaction path toward the formation of phenolic esters. (C) 2016 Elsevier Ltd. All rights reserved.