Synthesis of 3,3-Arylidene Bis(4-Hydroxycoumarin) Catalyzed by ip/i-Dodecylbenzenesulfonic Acid (DBSA) in Aqueous Media and Microwave Irradiation

摘要

A series of 3,3-arylidene bis(4-hydroxycoumarins) were synthesized by the reaction of aromatic aldehydes with 4-hydroxycoumarin using dodecylbenzenesulfonic acid as Br?nsted acid-surfactant catalyst in aqueous media and under microwave irradiation. The present method is operationally simple and the use of water as the reaction medium makes the process environmentally benign.