Regioselective synthesis of polysubstituted 4H-thiopyrans from β-oxodithioesters
摘要:
A simple and efficient method for the synthesis of polyfunctionalized 4H-thiopyrans by highly regioselective cyclocondensation of beta-oxodithioesters with 1,1,3-trialkyl or aryl substituted prop-2-yn-1-ols using BF3 center dot Et2O as the catalyst is described. (C) 2014 Elsevier Ltd. All rights reserved.