## Abstract Die mesoionischen 2,1,3‐Benzothiadiazin‐2,2‐dioxide **5** warden spontan aus 2‐Aminobenzalde‐hyd‐dimethylacetal (**2**) und __N__‐Alkylamidosulfonylchloriden unter CH~3~OH‐Abspaltung erhalten. Strukturuntersuchungen mit Hilfe spektroskopischer Methoden ‐ insbesondere der Röntgenphotoele
1H-2.1.3-Benzothiadiazin-2.2-dioxide Cyclische und bicyclische Sulfamide, 2. Mitt.
✍ Scribed by M. Knollmüller
- Publisher
- Springer Vienna
- Year
- 1971
- Tongue
- English
- Weight
- 860 KB
- Volume
- 102
- Category
- Article
- ISSN
- 0026-9247
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## Abstract A new method for the preparation of 4‐substituted 3,4‐dihydro‐1__H__‐2,1,3‐benzothiadiazine 2,2‐dioxides is described. Treatment of __t__‐butyl __N__‐phenylsulfamoylcarbamate derivatives (**1**) with different aldehydes afforded the corresponding intramolecular cyclized products **2** u
A simple method for the preparation of 4,4-disubstituted-3,4-dihydro-1H-2,1,3-benzothiadiazine 2,2dioxides is described. Treatment of N-sulfonyl ketimines 2 and 3 with different carbon nucleophiles afforded the corresponding of 4,4-disubstituted-3,4-dihydro-1H-2,1,3-benzothiadiazine 2,2-dioxides 1 i