A mild and efficient method was applied for the one-pot three-component synthesis of pyrazolo[1,2-a][1,2,4]triazole-1,3-diones from the condensation between arylaldehydes, malononitrile and 4-phenylurazole using electrolysis in an undivided cell in the presence of sodium bromide as an electrolyte. This procedure has many advantages such as : no need to catalyst, clean work-up, short reaction time and high yield. The products were obtained just with the simple filtration.
在以
溴化钠为电解质的条件下,采用电解法在不分区电池中以芳基醛、
丙二腈和 4-苯基
脲唑缩合为原料,一锅三组分合成
吡唑并[1,2-a][1,2,4]三唑-1,3-二酮。这种方法有许多优点,如:无需催化剂、操作简便、反应时间短、产率高。产品只需简单过滤即可获得。