Heterocyclic compounds from urea derivatives. Part XXI. Adducts from thiocarbonohydrazides and aroyl isothiocyanates and their cyclisation
作者:Frederick Kurzer
DOI:10.1039/j39710002932
日期:——
1-benzylidene-thiocarbonohydrazide and aroyl isothiocyanates yield the appropriate mono-adducts analogously. 1-Aminothiocarbamoyl-4-benzoyl-3-thiosemicarbazide, the simplest representative of these classes of compounds, is cyclised to 3-mercapto-5-phenyl-1,2,4-triazole in alkaline, and to 2-benzamido-5-mercapto-1,3,4-thiadiazole in acid media; the action of alkyl halides in the appropriate alcohol yields 2-benzamido-5-alkylthio-1
通过分别加入一或两摩尔的芳基异硫氰酸酯,将硫代碳酰肼转化为1-氨基硫代氨基甲酰基-4-芳酰基-3-硫代氨基脲或1,5-双(芳基-硫代氨基甲酰基)硫代碳酰肼。1-苯基-或1-亚苄基-硫代碳酰肼和芳酰基异硫氰酸酯类似地产生合适的单加合物。这些化合物中最简单的代表-1-Aminothiocarbamoyl-4-benzoyl-3-thiosemicarbazide被环化成碱性的3-巯基-5-苯基-1,2,4-三唑和2-benzamido-5-在酸性介质中的巯基1,3,4-噻二唑; 在适当的醇中卤代烷的作用产生2-苯甲酰胺基-5-烷硫基-1,3,4-噻二唑。其他类型的单加合物和双加合物的行为相似。