Cucurbit[6]uril-OSO3H: a novel acidic nanocatalyst for the one-pot preparation of 14-aryl-14H-dibenzo[a,j]xanthenes and 1,8-dioxo-octahydro-xanthenes

Abstract

Cucurbit[6]uril-OSO₃H (CB[6]-OSO₃H) has been prepared and used as an efficient acidic nanocatalyst for the one-pot preparation of 14-aryl-14H-dibenzo[a,j]xanthenes and 1,8-dioxo-octahydro-xanthenes. The nanocatalyst was characterized by FT-IR, AFM, TEM, and TGA analyses. This green protocol is catalyzed by CB[6]-OSO₃H, and proceeds efficiently in the absence of any organic solvent under optimized, mild, green and environmentally benign reaction conditions in high yields and within a short reaction time.