Greener and rapid access to bio-active heterocycles: one-pot solvent-free synthesis of 1,3,4-oxadiazoles and 1,3,4-thiadiazoles
作者:Vivek Polshettiwar、Rajender S. Varma
DOI:10.1016/j.tetlet.2007.11.165
日期:2008.1
A novel one-pot solvent-free synthesis of 1,3,4-oxadiazoles and 1,3,4-thiadiazoles by condensation of acid hydrazide and triethyl orthoalkanates under microwave irradiations is reported. This green protocol was catalyzed efficiently by solid supported Nafion®NR50 and phosphorus pentasulfide in alumina (P4S10/Al2O3) with excellent yields.