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Ring-Opening Reactions of Mesoionic [1,2,4]Triazolo[1,5-c]quinazolines. – Preparation of 1,2,4-Triazolo[3,4-b][1,3,4]thiadiazoles by a Translocative Rearrangement

✍ Scribed by Molina, Pedro ;Arques, Antonio ;Alias, Maria Asunción ;Saiz, Antonio Luis Llamas ;Concepción Foces-Foces, Maria De La

Publisher
John Wiley and Sons
Year
1989
Tongue
English
Weight
446 KB
Volume
1989
Category
Article
ISSN
0947-3440

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## Abstract The reaction of benzoyl isothiocyanates and methoxycarbonyl isothiocyanate with 4‐amino‐4,5‐dihydro‐3‐(methylthio)‐1,2,4‐triazin‐5‐ones in acetonitrile gave several substituted 4__H__‐1,3,4‐thiadiazolo[2,3‐__c__]‐1,2,4‐triazin‐4‐ones VIa‐h instead of the expected thioureas. In addition,