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Heterocycles. CXV. Reactions of 3-diazo-3H-indazole with reactive methylene compounds and formation of indazolo[3,2-c]-1,2,4-triazines, a new heterocyclic system

✍ Scribed by Fortuna, D.; Stanovnik, B.; Tisler, M.


Book ID
115488219
Publisher
American Chemical Society
Year
1974
Tongue
English
Weight
546 KB
Volume
39
Category
Article
ISSN
0022-3263

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2,2-Dioxo-1H-thieno[3,4-c][1,2]thiazines
✍ Egon FanghΓ€nel; Hagen Bartossek; Ute Baumeister; Matthias Biedermann; Helmut Har πŸ“‚ Article πŸ“… 1998 πŸ› Journal of Heterocyclic Chemistry 🌐 English βš– 467 KB

## Abstract The first synthesis of substituted 2,2‐dioxo‐1‐phenyl‐1__H__‐thieno[3,4‐__c__][1,2]thiazines 2 and some of their reactions are achieved. Compounds 2 were prepared from the 3,5‐dimethyl‐1,1‐dioxo‐1,2‐thiazine‐4‐carbaldehydes 1 by reaction with sulfur and triethyl amine in dimethylformami