Photochemistry of the nitrogen–thiocarbonyl systems. Part. 24. Photoreactions of thiobenzamide with various substituted furans: regioselective β-benzoylation and transformation of furans to other aromatic compounds

Abstract

In the photoreaction of thiobenzamide 1 with the substituted furans 2 and 8, β-benzoylation was the major reaction. With other furans, 2i, j and 8g, h, both transformation of furans to pyrroles and benzannulation occurred in preference to benzoylation.