Enantioselective conjugate addition to cyclic enones with scalemic lithium organo(amido)cuprates, Part IV. Relationship between ligand structure and enantioselectivity
作者:Bryant E. Rossiter、Masakatsu Eguchi、Guobin Miao、Nicole M. Swingle、Amelia E. Hernández、Denise Vickers、Ezdan Fluckiger、R. Greg Patterson、K. Vásavi Reddy
DOI:10.1016/s0040-4020(01)86278-5
日期:1993.1
Scalemic lithium amides derived from primary and secondary amines react with organocopper compounds in ether or dimethyl sulfide to form lithium organo(amido)cuprates capable of enantioselective conjugate addition to 2-cycloalkenones. The most successful heterocuprate, in which the chiral ligand is (S)-N-methyl-1-phenyl-2-(1-piperidinyl)ethanamine, (S)-MAPP, 13, reacts with cyclic enones to form products
衍生自伯胺和仲胺的垢性锂酰胺与有机铜化合物在醚或二甲基硫醚中反应,形成能够对2-环烯酮进行对映选择性共轭加成的有机(酰胺基)碳酸锂。最成功的杂铜酸盐,其中手性配体为(S)-N-甲基-1-苯基-2-(1-哌啶基)乙胺,(S) -MAPP,13,与环状烯酮反应生成最高97%ee。观察到由配体13形成的铜酸盐的非线性不对称诱导。