Synthesis of substituted 2,3,5,6-tetraarylbenzo[1,2-b:5,4-b']difurans

Article abstract of DOI:10.1021/jo00110a038

A series of substituted 2,3,5,6-tetraarylbenzo[1,2-b:5,4-b']difurans 1 was synthesized. This synthesis is based upon the photocyclization of 2,5-dibenzoylresorcinol dibenzyl ethers to the corresponding tetrahydrobenzo[1,2-b:5,4-b']difurans. Treatment of t