1,3-Cycloaddition of cyclic isothioureas to heterocumulenes and fungitoxicity of the resulting 1,2,4-triazolo(3,4-c)-1,2,4-dithiazoles.
作者:H. SINGH、L. D. S. YADAV、K. S. SHARMA
DOI:10.1271/bbb1961.47.1017
日期:——
Phenacylation of 5-aryl-3-mercapto-1, 2, 4-triazoles (I) furnished 5-aryl-3-phenacylthio-1, 2, 4-triazoles (II) which reacted with CS2 and aryl isothiocyanates to give 5-aryl-1, 2, 4-triazolo[3, 4-c]-1, 2, 4-dithiazole-3-thiones (III) and 5-aryl-3-arylimino-l, 2, 4-triazolo[3, 4-c]-1, 2, 4-dithiazoles (IV), respectively. (IV) on refluxing with CS2 yielded (III) which, when heated with aryl isothiocyanates, regenerated (IV). Compounds (II)-(IV) were compared with Dithane M-45 for their fungitoxicity against Helminthosporium oryzae and Fusarium oxysporium. The screening results have been correlated with the structural features of the tested compounds.
5-芳基-3-巯基-1,2,4-三唑(I)的苯酰甲基化反应生成5-芳基-3-苯酰甲硫基-1,2,4-三唑(II),后者与二硫化碳和芳基异硫氰酸酯反应,分别得到5-芳基-1,2,4-三唑并[3,4-c]-1,2,4-二硫氮杂-3-硫酮(III)和5-芳基-3-芳亚氨基-1,2,4-三唑并[3,4-c]-1,2,4-二硫氮杂(IV)。(IV)与二硫化碳回流反应生成(III),后者在加热条件下与芳基异硫氰酸酯反应再生(IV)。化合物(II)至(IV)与代森锰M-45在抑制稻纹枯病菌和小麦赤霉病菌的杀菌活性方面进行了比较。筛选结果与测试化合物的结构特征相关联。