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Thieno[3,4-c]isothiazole. Synthesis of a new nonclassical thiophene and its cycloaddition to alkynes and alkenes

✍ Scribed by Hans Gotthardt; Friedemann Reiter


Publisher
Elsevier Science
Year
1976
Tongue
French
Weight
212 KB
Volume
17
Category
Article
ISSN
0040-4039

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2,2-Dioxo-1H-thieno[3,4-c][1,2]thiazines
✍ Egon Fanghänel; Hagen Bartossek; Ute Baumeister; Matthias Biedermann; Helmut Har 📂 Article 📅 1998 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 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