Ytterbium triflate promoted coupling of phenols and propiolic acids: synthesis of coumarins
作者:Serena Fiorito、Francesco Epifano、Vito A. Taddeo、Salvatore Genovese
DOI:10.1016/j.tetlet.2016.05.087
日期:2016.6
Coumarins are a well-known class of natural occurring and semi-synthetic products with reported important and effective pharmacological activities. In this Letter an improved method for the chemical synthesis of such compounds is described. Coumarins have been obtained in good to excellent yields under microwave irradiation and solvent-free conditions in a short time from differently substituted phenols