Novel pyrrolidine-thiohydantoins/thioxotetrahydropyrimidinones as highly effective catalysts for the asymmetric Michael addition
作者:Christoforos G. Kokotos、Dimitris Limnios、Despoina Triggidou、Maria Trifonidou、George Kokotos
DOI:10.1039/c0ob01083a
日期:——
The synthesis of novel organocatalysts consisting of a pyrrolidine moiety and a thiohydantoin or a thioxotetrahydropyrimidinone ring is described. The compound combining the pyrrolidine with the thioxotetrahydropyrimidinone was found to be a highly effective catalyst for the Michael reaction. Low catalyst loadings (1–2.5%) can be employed leading to quantitative yields and excellent stereoselectivities
描述了由吡咯烷部分和硫代乙内酰脲或硫代四氢嘧啶酮环组成的新型有机催化剂的合成。发现将吡咯烷与硫代四氢嘧啶酮组合的化合物是用于迈克尔反应的高效催化剂。在环酮与硝基烯烃之间的反应中,可采用低催化剂负载量(1-2.5%),以实现定量收率和出色的立体选择性。