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題 名 | The Syntheses of 4-Arylamino-1,2,3-triazoles and Stable 6-Sydnonyl verdazyls from Sydnone Derivatives and Their Fragments |
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作 者 | 郭文發; 林益滋; 孫效文; 葉茂榮; | 書刊名 | Journal of the Chinese Chemical Society |
卷 期 | 48:4 2001.08[民90.08] |
頁 次 | 頁769-782 |
分類號 | 346.01 |
關鍵詞 | 2-Arylamino-2H-1,2,3-triazole; 3,4-Dihydro-3-oxo-1,2,4,5-tetrazin-1(2H)-yl radical; |
語 文 | 英文(English) |
英文摘要 | a-Chloroformylarylhydrazones 1 and a-chloroformylarylhydrazones of sydnonecarbaldehydes 3 have been prepared by a new synthetic route: a-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. |
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