Oxathiolane and dithiolane exchange reaction for carbonyl group protection: a new, fast and efficient procedure without solvent under microwave irradiation
Abstract
Protection of aldehydes and ketones as hemithioacetals or dithioacetals by an exchange reaction from 2,2-dimethyl-1,3-oxathiolane or 2,2-dimethyl-1,3-dithiolane catalyzed by solid acidic catalysts is readily achieved without solvent under microwave irradiation.