397884-34-3Relevant academic research and scientific papers
The syntheses of 4-arylamino-1,2,3-triazoles and stable 6-sydnonyl verdazyls from sydnone derivatives and their fragments
Kuo, Wen-Fa,Lin, I.-Tzu,Sun, Shiaw-Wen,Yeh, Mou-Yung
, p. 769 - 782 (2001)
α-Chloroformylarylhydrazones 1 and α-chloroformylarylhydrazones of sydnonecarbaldehydes 3 have been prepared by a new synthetic route: α-chloroformylarylhydrazines hydrochlorides 2 reacted with corresponding carbonyl compounds. Reactions of compounds 3 with various hydrazines to give 6-sydnonyl-1,2,4,5-tetrazinan-3-ones 7 and/or carbazones 8 were also investigated. By oxidization with lead dioxide, compounds 7 were transformed to stable 6-sydnonyl-3,4-dihydro-3-oxo-1,2,4,5-tetrazin-1(2H)-yl radical derivatives 9 (sydnonyl verdazyls). Furthermore, sydnonecarbaldehydes arylhydrazones 5 through acidic conditions could be transferred to 4-arylamino-1,2,3-triazoles 6 which were also obtained by means of acidic decompositions of 4-formylsydnones 10.
