3-Arylsydnone-4-carbohydroximic acid chlorides 1 were reacted with hydrazine hydrate to give hydrazino(3-arylsydnon-4-yl)methanone oximes 2 which are good precursors of 4-triazolyl sydnones. 5-Aryl-3-(3-arylsydnon-4-yl)-1H-[1,2,4]triazoles 4 could be synthesized in excellent yields by reacting hydrazino(3-arylsydnon-4-yl)methanone oximes 2 with aromatic aldehydes 3 under acid catalysis. Compounds 2 were also reacted with 3-aryl-4-formylsydnones 5 and aliphatic aldehydes 7 to produce 3-(3-arylsydnon-4-yl)-5-(3-arylsydnon-4-yl)-1H-[1,2,4]triazoles 6 and 5-alkyl-3-(3-arylsydnon-4-yl)-1H-[1,2,4] triazoles 8, respectively.
3-Arylsydnone-4-carbohydroximic acid chlorides 1 与
水合
肼反应生成了
肼基(3-芳基壬-4-基)甲酮
肟 2,这是 4-三唑基sydnones 的良好前体。在酸催化下,
肼基(3-芳基锍-4-基)甲酮
肟 2 与芳香醛 3 反应,可合成 5-芳基-3-(3-芳基锍-4-基)-1H-[1,2,4]三唑 4,产量极高。化合物 2 还可与 3-芳基-4-甲酰基壬酮 5 和脂肪族醛 7 反应,分别生成 3-(3-芳基壬-4-基)-5-(3-芳基壬-4-基)-1H-[1,2,4]三唑 6 和 5-烷基-3-(3-芳基壬-4-基)-1H-[1,2,4]三唑 8。