Furazan ring opening upon treatment of benzofurazan with ethanolamine to yield quinoxalines

Heating of benzofurazans with ethanolamine in the presence of catalytic amount of p-toluenesulfonic acid leads to quinoxalines. Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 12, pp. 2424–2425, December, 2007.     

Synthesis of derivatives of benzofurazan and benzofuroxan based on 1,4-dioxaspiro[4,5]decan-8-one and 4-hydroxycyclohexanone

Starting from 1,4-dioxaspiro[4,5]decan-8-one and 4-hydroxycyclohexanone, we have synthesized derivatives of tetrahydrobenzofurazan and tetrahydrobenzofuroxan containing a hydroxy or dioxolane group in the 6 position of the ring. We have studied the behavior of the compounds obtained under acid hydrolysis conditions.Novosibirsk Institute of Organic Chemistry, Russian Academy of Sciences, Siberian Branch, Novosibirsk 630090, Russia. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1135–1142, August, 2000.