Y. Ueno, Keiichi Maeda, J. Koshitani
Sep 28, 1982
Citations
0
Influential Citations
10
Citations
Journal
Journal of Heterocyclic Chemistry
Abstract
The substituted 6-bromo and 6-chloro-5H-benzo[a]phenoxazin-5-ones, prepared by condensation of substituted 2-aminophenols with 2,3-dibromo or 2,3-dichloro-1,4-naphthoquinone in methanolic potassium hydroxide solution, have been dehalogenated to substituted 5H-benzo[a]phenoxazin-5-ones in the presence of sodium hydrosulfite dissolved in aqueous pyridine under nitrogen atmosphere.