MCM-41@Schiff base-Mn(OAc) 2 , a heterogeneous catalyst, was used for one pot synthesis of xanthene derivatives in water with aldehydes, 5,5-dimethyl-1,3-cyclohexanedione and 2-naphthol. This method exhibited some advantages including excellent yields, environmentally benign and good functional group tolerance, and the catalytic system presented some features of the less amount of catalyst and excellent reusability by experiment.

A new simple and efficient one-pot synthesis of thiazolidinone derivatives via aldehydes, amines and mercaptoacetic acid in the presence of Zn(OAc) 2 -Schiff base complex immobilized on MCM-41 is described. A variety of aldehydes and amines were engaged in the study and afforded respective thiazolidinones in high yield (up to 98%). Moreover, consistent activity of recovered catalyst was found to be almost same up to five cycles in 80% yield.