Synthesis of novel thiadiazoles and bis-thiadiazoles from carbonothioic dihydrazide
作者:Abdelwahed R. Sayed
DOI:10.1016/j.tetlet.2010.06.060
日期:2010.8
Efficient syntheses of 1,3,4-thiadiazoles and bis-thiadiazoles by the reaction of hydrazonoyl halides with carbonothioic dihydrazide are reported. In addition, 1,2,4-triazolo[3,4-b][1,3,4]thiadiazole is obtained via oxidativecyclization of bis-(substituted methylene)carbonothioic dihydrazone.
据报道,通过酰卤与碳硫二酰肼的反应可有效合成1,3,4-噻二唑和双噻二唑。另外,通过双-(取代的亚甲基)碳硫代二di的氧化环化获得1,2,4-三唑并[3,4- b ] [1,3,4]噻二唑。
Preparation of Aryl Hydrazonates and 1,2-Diacylhydrazines by Phase Transfer Catalysis
作者:Ahmad Sami Shawali、Hamdi Mahmoud Hassaneen、Richard Pagni、Mourad Sherif Sherif
DOI:10.1246/bcsj.54.2545
日期:1981.8
A series of aryl hydrazonates has been prepared in excellent yield (>90%) by phase-transfercatalysis technique from the corresponding phenol and hydrazonoyl bromides in dichloromethane in the presence of tetrabutylammonium iodide. 1,2-Diacyl derivatives of arylhydrazines were also prepared by the same technique using carboxylic acids in place of phenols.