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Recyclization of mesoionic 4, 5-diphenyl-l,3, 4-thiadiazole-2-thione

✍ Scribed by A. Ya. Lazaris; S. M. Shmuilovich; A. N. Egorochkin

Book ID
112325162
Publisher
Springer US
Year
1976
Tongue
English
Weight
62 KB
Volume
12
Category
Article
ISSN
0009-3122

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Reaction of 4H-3.1-benzothiazine-4-lhiones 1 with S-methylisothiosemicarbazide hydroiodide yields bamino-1.3.4-thiadiazoles 2 insteud of the espected 1.2,4-triazolo[3,2-c]quinazolines. Structures of compounds 2 have been established by mcans of '>C-N M R analysis and X-ray crystallography. 3-Arnino-