Chemistry of Heterocyclic Compounds p. 1356 - 1359 (1987)
Update date:2022-08-11
Topics:
Belen'kaya, I. A.
Krokhina, G. P.
Sirik, S. A.
Andronati, S. A.
The Fries rearrangement of 4- and 5-acetoxybenzo-2,1,3-thiadiazoles has given 4-hydroxy-7-acetyl- and 5-hydroxy-4-acetylbenzo-2,1,3-thiadiazoles, which on oxidation afford mixtures of 5-chloro-4,7-dioxo- and 5,6-dichloro-4,7-dioxobenzo-2,1,3-thiadiazole and of 6-chloro-4,5-dioxo- and 6,7-dichloro-4,5-dioxobenzo-2,1,3-thiadiazole.Reaction of 6,7-dichloro-4,5-dioxobenzo-2,1,3-thiadiazole with ortho-phenylenediamine gives 4,5-dichloro-2,1,3-thiadiazolo<4,5-a>phenazine.
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(1991)
