Photochemical and thermal transformations of diazo derivatives of 1-aryloxy- and 1-arylthio-2-aminoanthraquinones

In the photochemical and thermal decomposition of diazonium derivatives of 1-aryloxy- and 1-arylthio-2-aminoanthraquinones in CH ₃ COOH and dioxane, high yields of intramolecular arylation products — anthra-2, 1-d]-4-tert-butylbenzo-b]-furan-and anthra-2, 1-d]-4-tert-butylbenzo-b]-thiophene-8,13-diones — are formed. It was established that 2-azo derivatives of 1-aryloxy- and 1-acyloxyanthraquinones synthesized on the basis of the diazonium salts are stable under photolysis conditions.Novosibirsk Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk 630090. Translated from Izvestiya Akademii Nauk, Seriya Khimicheskaya, No. 3, pp. 582–585, March, 1992.