Cu(OAc)2/MCM-41: an efficient and solid acid catalyst for synthesis of 2-arylbenzothiazoles under ultrasound irradiation.

A new, convenient method for the syntheses of 2-arylbenzothiazoles is described in the presence of catalytic amounts of Cu(OAc)(2)/MCM-41 under ultrasonic irradiation. Short reaction times, easy and quick isolation of the products, reusability of the catalyst and excellent yields are the main advantages of this procedure.