Ultrasound-promoted efficient domino reaction for the one-pot synthesis of spiro-5-cyanopyrimidines: a rapid procedure
作者:Essam M. Hussein
DOI:10.1007/s00706-013-1047-y
日期:2013.11
been developed for the synthesis of various spiro-5-cyanopyrimidines via the three-component condensation of cyclic ketones, nitrile derivatives, and thiourea or urea in ethanol at 60 °C using K2CO3 as catalyst under ultrasonic irradiation. In comparison to conventional methods, high yields, easy work-up, and short reaction times are advantages of this sonocatalyzed procedure. The effects of the catalyst
摘要通过在超声波下使用K 2 CO 3作为催化剂,在60°C的条件下,通过环酮,腈衍生物和硫脲或尿素在乙醇中的三组分缩合反应,已开发出新颖高效的合成螺5氰基嘧啶的新方法。辐射。与常规方法相比,这种声催化方法的优点是产率高,后处理容易,反应时间短。检查了催化剂,溶剂和温度的影响。 图形概要 。