2-dicarbonyl compounds with thiocarbohydrazide and its 1- and 1,4-alkyl-(aryl)-substituted analogs has been studied. Treatment of diacetyl with the polynucleophiles indicated gives monohydrazones and/or 5-methylene-4,5-dihydro-2H-[1,2,4]triazine-3-thiones. Reaction of phenylglyoxal and benzil with thiocarbohydrazide yields 5-hydroxy- or 5-alkoxy-4,5-dihydro-2H-[1,2,4]triazine-3-thiones depending on the nature
已经研究了一系列的1,2-二羰基化合物与
硫代碳酰
肼及其1-和1,4-烷基-(芳基)取代的类似物的反应。用所示的多亲核试剂处理
二乙酰基得到一hydr和/或5-亚甲基-4,5-二氢-2H-
[1,2,4]三嗪-3-
硫酮。苯
乙二醛和苯甲酰与
硫代碳酰
肼反应生成5-羟基-或5-烷氧基-4,5-二氢-2H-
[1,2,4]三嗪-3-
硫酮,具体取决于溶剂的性质。与1,1-
二甲基硫代碳酰
肼缩合的产物显示出
硫代碳hydr – 5-羟基-4,5-二氢-2H-
[1,2,4]三嗪-
硫代3-
环丁烯环链型平衡。