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An efficient and environmentally benign method has been developed for the synthesis of 5arylidine-2-(methylthio)-thiazolones derivatives using Alum [KAl(SO4)2•12H2O] catalyst and triethyl amine in water under microwave irradiation. This green transformation generated one C-S and one CC bond, condensation and S-methylation. Notable advantages for the present protocol include, short reaction time, cleaner reaction profile and easy isolation of product by microwave irradiation technique using green catalyst and solvent.

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