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Preparation of 2,3-Dihydrothiazolo[3,2-c]quinazolinium Salts from 4(3H)-Quinazolinethiones or 4H-1,3-Benzothiazine-4-thiones

✍ Scribed by Molina, Pedro ;Arques, Antonio ;Vinader, Maria Victoria

Publisher
John Wiley and Sons
Year
1987
Tongue
English
Weight
787 KB
Volume
1987
Category
Article
ISSN
0947-3440

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Preparation of 2-substituted 1,3,4-thiad
Preparation of 2-substituted 1,3,4-thiadiazoles and mesoionic 1,3,4-thiadiazole[3,2-c]quinazolines from 4H-3,1-benzothiazine-4-thiones or 3-amino-4(3H)-quinazolinethiones
✍ Molina, Pedro ;Arques, Antonio ;Cartagena, Inmaculada ;AlΓ­as, MarΓ­a AsunciΓ³n ;de πŸ“‚ Article πŸ“… 1988 πŸ› John Wiley and Sons 🌐 English βš– 756 KB

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-