derived from 1,2-diaminocyclohexane and 9-amino (9-deoxy) cinchona alkaloid was developed into asymmetric Michael addition of malonates to enones. A series of cyclic and acyclic enones could react very well with different malonates in the presence of 4 with 0.5−10 mol % catalyst loading affording chiral Michael adducts with excellent yields and ee values.
由
1,2-二氨基环己烷和9-
氨基(9-脱氧)
金鸡纳
生物碱衍生的新型
伯胺硫脲有机催化剂被开发为
丙二酸酯向烯酮的不对称迈克尔加成反应。一系列环状和无环烯酮在4的存在下,催化剂负载量为0.5-10 mol%,可以与不同的
丙二酸酯很好地反应,从而提供具有优异收率和ee值的手性迈克尔加合物。