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Unusual formation of 2,1-benzisothiazole derivatives

✍ Scribed by Emad Aqad; Arkady Ellern; Vladimir Khodorkovsky

Publisher
Elsevier Science
Year
1998
Tongue
French
Weight
170 KB
Volume
39
Category
Article
ISSN
0040-4039

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✦ Synopsis

Condensation of N,N-dimethyl-p-nitrosoaniline with 2-thioxo-2H-thienol2,3-dlthiazole-6(5H)-ones 2a, 2b and 2-thioxo-2H-thieno[2,3-d]-l,3-dithiole-6(5H)-one 3, leads unexpectedly to the formation of 2,1-benzisothiazole derivatives

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## Abstract An improved and general synthesis of saccharin methylthio and methylsulfone derivatives from chlorosubstituted saccharins is presented. A large‐scale procedure for preparation of chloro‐substituted saccharins was developed. Treatment of the saccharin chlorides with sodium thiomethoxide