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■ Studies on Quinones. Part 31. Synthesis and Cyclization of Substituted 2-Acetylamino-1,4-benzoquinones

Jaime A. Valderrama* and M. Florencia González

*Facultad de Química, Pontificia Universidad Católica de Chile, Casilla 306, Correo 22, Santiago, Chile

Abstract

The synthesis of 4-acetylamino-5-hydroxybenzo[b]furans (7a), (7b), (13), and their oxidative furan ring opening to the corresponding substituted 2-acetylamino-1,4-beznoquinones (1a), (1b), and (2) are reported. The acid-induced cyclization of quinones (1a) and (2) to afford N-heterocyclic quinones (15) and (16) is also described.