Indole, Cinnoline, Benzothiazine and Dihydrofuroquinoline Derivatives from Aryldifurylmethanes.

Until recently the most publications on furylarylmethanes were devoted to their application as promising source for polymer producing [1-3] or as intermediates in the synthesis of calixarenes and crown ethers [4, 5]. At the same time, due to the availability of furan ring in the molecules of these compounds they can serve as convenient and useful precursors for syntheses of various heterocyclic compounds condensed with benzene cycle. But looking through the literature we could find only one example of similar use of furylarylmethanes: Prof. Gurnos Jones and co-workers obtained carbazole derivative from 2-nitrophenyldifurylmethane under treatment of latter with triethylphosphite