An efficient and fast synthesis of 4-aryl-3,4-dihydrocoumarins by (CF3SO3)3Y catalysis under microwave irradiation

摘要

A new and efficient synthesis of eleven 4-aryl-3,4-dihydrocoumarins,in which six are new compounds,was performed using (CF3SO3)3Y as catalyst under microwave irradiation.The target compounds were obtained in good yields (68-80%) and remarkable time (7-20 min) when compared to the literature reports (1-40 h).