Selective synthesis of 4-thiomethyl-1,3-dioxolan-2-ones under microwave irradiation using an environmentally benign KF/Al2O3/PEG-400 system

摘要

We describe a simple and rapid method for selective synthesis of 4-thiomethyl-1,3-dioxolan-2-ones promoted by KF/Al2O3 using PEG-400 as solvent under microwave irradiation. The protocol employs 3-O-tosyl glycerol 1,2-carbonate 1 and a diverse array of thiols 2 to afford corresponding 4-thiomethyl-1,3-dioxolan-2-ones 3 in good yield and short reaction time compared with conventional heating methods. Moreover, selective synthesis of 1,3-bis-arylthiopropan-2-ol 4 by a stoichiometric and temperature-controlling reaction is presented.