Synthesis of 5-membered heterocycles and related compounds.
作者:VISHNUJI RAM、HRIDVANAND PANDEY
DOI:10.1248/cpb.22.2778
日期:——
Some 1-(2, 4-dichlorophenoxy and 2, 4, 5-trichlorophenoxy) acetyl-4-arylthiosemicarbazides were prepared from corresponding chlorophenoxyacetohydrazide. The resulting thiosemicarbazides were cyclised into 1, 3, 4-thiadiazoles and 5-mercapto-1, 2, 4-triazoles under different reaction conditions. The mercapto compounds were converted into sulphides and sulphones. N'-arylidene (2, 4-dichlorophenoxy) acetohydrazides and 5-substituted-1, 3, 4-oxadiazole-2-thiones were also prepared from (2, 4-dichlorophenoxy and 2, 4, 5-trichlorophenoxy) acetohydrazides separately and were subjected to Mannich reaction. Some of these compounds were evaluated as fungicides against Aspergillus niger.
以相应的氯苯氧乙酰肼为原料,制备了一些 1-(2,4-二氯苯氧基和 2,4,5-三氯苯氧基)乙酰基-4-芳基硫代氨基甲酰肼。在不同的反应条件下,生成的硫代氨基甲酰肼被环化成 1,3,4-噻二唑和 5-巯基-1,2,4-三唑。巯基化合物被转化为硫化物和砜。此外,还分别从(2,4-二氯苯氧基和 2,4,5-三氯苯氧基)乙酰肼制备了 N'-芳基(2,4-二氯苯氧基)乙酰肼和 5-取代的-1,3,4-噁二唑-2-硫酮,并进行了曼尼希反应。其中一些化合物被评估为针对黑曲霉的杀真菌剂。