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Synthesis of 1,2,4-Triazolo[3,4-b]-1,3,4-thiadiazole Derivatives Containing Fragments of Sterically-Hindered Phenol.

✍ Scribed by V. I. Kelarev; S. V. Gres'ko; V. M. Abu-Ammar; K. I. Kobrakov


Publisher
John Wiley and Sons
Year
2004
Weight
198 KB
Volume
35
Category
Article
ISSN
0931-7597

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✦ Synopsis


Abstract

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Two general methods are reported for the preparation of 1,2,4-triazolo[3,4-b][1,2,4]thiadiazolium salts 4 from 4-amino-2,4-dihydro-2-methyl-5-(methylthio)-3H-1,2,4-triazol-3thione (1). The first one involves the initial formation of arylidene derivatives 2 which undergo cyclization by the action of