A non catalytic dehalogenation method of type 4 5-chloro-1,2,4-triazolo[1,5-a]pyrimidine derivatives based on the hydrolysis of the corresponding type 5 p-toluenesulphonyl hydrazones with diluted aqueous sodium carbonate solution was elaborated. The method provides the required 5-unsubstituted derivatives 6 also in those cases when the simple hydrogenation is not possible. Using deuterium oxide as
型的非催化脱卤方法4 5-
氯1,2,4-三唑并[1,5一个基于相应的5型的
水解]
嘧啶衍
生物p与稀释的
碳酸钠水溶液
甲苯磺酰腙进行详细阐述。在不可能简单氢化的情况下,该方法也提供了所需的5-未取代的衍
生物6。使用
氘化氢作为
水解的溶剂,
氘原子也可以插入衍
生物6的5位。还分离了反应的不同副产物,并给出了其形成的可能解释。