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A new procedure for the synthesis of 4-substituted-2H-1,2,3-benzothiadiazine 1,1-dioxides via directed ortho-lithiation of N1-arylsulfonylhydrazonates

✍ Scribed by Kacem, Yakdhane; Hassine, Béchir Ben

Book ID
120496489
Publisher
Elsevier Science
Year
2013
Tongue
French
Weight
375 KB
Volume
54
Category
Article
ISSN
0040-4039

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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