An efficient synthesis of novel 3-hydroxy-12-arylbenzo[a]xanthen-11-ones and 5,12-diarylxantheno[2,1-a]xanthene-4,12-diones using pTSA in [bmim]BF4

Abstract

We introduce a simple, efficient, and environmentally benign synthesis of a series of novel xanthenes via one-pot condensation of 2,6-dihydroxynaphthalene, aldehydes, and dimedone in [bmim]BF4 with pTSA as catalyst in high yields.