Organocatalysts that comprise a pyrrolidine ring and a thiodydantoin or a thioxopyrimidinone ring. The compounds are effective as catalysts in enantioselective and stereoselective organic reactions.
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