Catalytic Enantioselective C–C Bond-Forming Reactions of Deconjugated Butyrolactams: Michael Addition to α,β-Unsaturated Aldehydes and Ketones
作者:Soumya Jyoti Singha Roy、Santanu Mukherjee
DOI:10.1021/acs.joc.8b02051
日期:2018.10.5
deconjugated butyrolactams has been demonstrated for enantioselective Michael additions to α,β-unsaturated aldehydes and ketones. These reactions are catalyzed by diphenylprolinol silyl ether and trans-1,2-diaminocyclohexane-derived bifunctional primary aminothiourea, respectively, producing the Michael adducts with moderate diastereoselectivities and good to excellent enantioselectivities (up to 99:1 er). Unlike
已经证明,对于α,β-不饱和醛和酮的对映选择性迈克尔加成反应,解偶联的丁内酰胺的亲核反应性。这些反应分别由二苯基脯氨醇甲硅烷基醚和反式-1,2-二氨基环己烷衍生的双官能伯氨基硫脲催化,产生具有中等非对映选择性和良好至优异对映选择性(高达99:1 er)的迈克尔加合物。与在结构上相关的共轭丁烯内酯的情况不同,在乙烯基共轭的情况下普遍存在乙烯基共轭,而对于共轭异内酰胺则观察到了排他的α-加成。