Various N-aryl-N'-phenylthioureas, N, N'-diarylthioureas and N-(1, 2, 4-triazol-3-yl)-N'-arylthioureas were prepared and examined for uncoupling activities. The results indicate that substitution at the 4-position of the phenyl groups of diaryl thioureas is very important for uncoupling activities. Diphenyl thioureas substituted with two or more halogen atoms exhibited strong activities. The highest activity was exhibited by a compound containing nitro groups on both phenyl groups. These results indicate that the hydrophobicity and acidic nature of the compound are of primary importance for uncoupling activities. A remarkable decrease in activity was observed with the thioureas which were substituted with pyridine and 1, 2, 4-triazole rings. The reaction of phenyl isothiocyanate with 3-amino-1, 2, 4-triazole was also studied.
制备并测试了各种N-芳基-N'-苯基
硫脲、N,N'-二芳基
硫脲和N-(
1,2,4-三唑-3-基)-N'-芳基
硫脲的解偶联活性。结果表明,对于解偶联活性而言,二芳基
硫脲的苯基4-位取代非常重要。含有两个或更多卤素原子的二苯基
硫脲表现出强烈的活性。在两个苯基上都含有硝基的化合物显示出最高的活性。这些结果表明,化合物对疏
水性和酸性对于解偶联活性具有首要重要性。当
硫脲被
吡啶和
1,2,4-三唑环取代时,活性显著下降。还研究了苯基异
硫氰酸酯与3-
氨基-
1,2,4-三唑的反应。