SYNTHESIS OF 3-SUBSTITUTED 4,1,2-BENZOTHIADIAZINE 4,4-DIOXIDES AND 2-SUBSTITUTED OR 3-SUBSTITUTED 1,4-BENZOTHIAZINE 1,1-DIOXIDES

Authors
BALBI A SOTTOFATTORI E MAZZEI M
Citation
A. Balbi et al., SYNTHESIS OF 3-SUBSTITUTED 4,1,2-BENZOTHIADIAZINE 4,4-DIOXIDES AND 2-SUBSTITUTED OR 3-SUBSTITUTED 1,4-BENZOTHIAZINE 1,1-DIOXIDES, Journal of heterocyclic chemistry, 33(2), 1996, pp. 347-350
Citations number
7
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Journal of heterocyclic chemistry → ACNP
ISSN journal
0022152X
Volume
33
Issue
2
Year of publication
1996
Pages
347 - 350
Database
ISI
SICI code
0022-152X(1996)33:2<347:SO344A>2.0.ZU;2-T
Abstract
The title compounds were prepared starting from the synthones 6 using two different synthetic approaches: 3-substituted 1,4-benzothiazine 1, 1-dioxides were synthesised by cyclisation with phosphorus oxychloride as the Vilsmeier reagent, while 4, 1,2-benzothiadiazine 4,4-dioxides and 3-substituted 1,4-benzothiazine 1,1-dioxides were obtained by dire ct diazotisation or by cyclisation with triethyl orthoformate.