Copper-catalyzed interrupted click reaction: The synthesis of 3-difluoromethyl-substituted 1,2,4-triazinones
作者:Wei Wu、Chao Xu、Zhiqiang Weng
DOI:10.1016/j.jfluchem.2019.109359
日期:2019.10
A copper-catalyzed interrupted click reaction for the preparation of 3-difluoromethyl-substituted 1,2,4-triazinones is developed. The reaction of terminal alkyne with azide and difluoroacetic anhydride affords the desired products in moderate to good yields. This method provides ready access to 3-difluoromethyl 1,2,4-triazinones, notable synthetic targets, from simple, readily available starting materials
开发了一种铜催化的间断点击反应,用于制备3-二氟甲基取代的1,2,4-三嗪酮。末端炔与叠氮化物和二氟乙酸酐的反应以中等至良好的产率提供了所需的产物。该方法可从简单易得的起始原料中轻松获得3-二氟甲基1,2,4-三嗪酮,这是著名的合成目标。另外,与氯二氟乙酸酐的反应得到相应的3-氯二氟甲基取代的1,2,4-三嗪酮。