Three-component condensation reaction of an aldehyde with β-ketoester and urea or thiourea in acetonitrile to
afford the dihydropyrimidinones and thions (DHPMs) in the presence of 22% Co/CeO2-ZrO2 nano fine particle as a novel,
reusable and green catalyst is reported. Utilizing of 22% Co/CeO2-ZrO2 nano fine particle catalyst also offers a cleaner
process in that it can be reused and will not bring additional pollutants into the “environment” that is agreeable green
chemistry point of view.
据报道,在 22% Co/
CeO2-ZrO2 纳米微粒这种新型、可重复使用的绿色催化剂存在下,在
乙腈中进行醛与β-
酮酯和
脲或
硫脲的三组分缩合反应,生成二氢
嘧啶酮和
硫代物(
DHPMs)。利用 22% Co/ -ZrO2 纳米微粒催化剂还提供了一种更清洁的工艺,因为它可以重复使用,不会给 "环境 "带来额外的污染物,这符合绿色
化学的观点。