Brønsted Acid-Catalyzed Propargylation/Cycloisomerization Tandem Reaction: One-Pot Synthesis of Substituted Oxazoles from Propargylic Alcohols and Amides
An efficient one-pot propargylation/cycloisomerization tandem process has been developed for the synthesis of substituted oxazole derivatives from propargylic alcohols and amides with use of p-toluenesulfonic acid monohydrate (PTSA) as a bifunctional catalyst. This method provides a rapid and efficient access to substituted oxazoles.
A rapid and efficient procedure under microwave irradiation, using silica gel-supported reagents for the synthesis of substitued oxazoles has been developed through iron trichloride catalyzed propargylation/cycloisomerization tandem reaction of propargylic acetates and amides.