1-Chloro-1,4-diaryl-2,3-diazabutadienes (Ar1CClNNCHAr2), prepared by the reaction of thionyl chloride with aroylhydrazones (Ar1CONHNCHAr2), react with thiosemicarbazide or thiocarbohydrazide to give 2-arylidenehydrazino-5-aryl-1,3,4-thiadiazoles, and with potassium thiocyanate to give 1-thiocyanato-1,4-diaryl-2,3-diaza-butadienes which isomerize thermally to arylideneamino-5-aryl-1,3,4-thiadiazoles
通过亚
硫酰氯与芳酰
肼(Ar 1 CONHN CHAr 2)反应制得的1-Chloro-1,4-diaryl-2,3-diazabutadienes(Ar 1 CCl NN CHAr 2)与
硫代
氨基
脲或
硫代碳酰
肼反应生成2-亚芳基
肼基-5-芳基-1,3,4-
噻二唑,并与
硫氰酸钾反应生成1-
硫氰酸根-1,4-二芳基-2,3-二氮杂-
丁二烯,其热异构化为芳基
氨基-5-芳基-1,3 ,4-
噻二唑。1-
氯-1,4
-二苯基-2,3-二氮杂
丁二烯与
乙基黄原酸钾反应生成1-乙基黄
蒽基-2,3-二氮杂
丁二烯,经热解后生成
2,5-二苯基-1,3,4-噻二唑。