Reversal of Enantioselectivity between the Copper(I)- and Silver(I)-Catalyzed 1,3-Dipolar Cycloaddition Reactions Using a Brucine-Derived Amino Alcohol Ligand
作者:Hun Young Kim、Hui-Ju Shih、William E. Knabe、Kyungsoo Oh
DOI:10.1002/anie.200903479
日期:2009.9.21
The old switcheroo: The switch in the enantioselectivity of a reaction by using a single chiral source has been achieved using different metal binding modes of the chiral amino alcohol 1 in the presence of CuI and AgI sources. Azomethine ylides were shown to undergo highly enantio‐ and diastereoselective 1,3‐dipolar cycloadditions with substituted tert‐butyl acrylates to provide both of the enantiomerically
旧的switcheroo:在存在Cu I和Ag I源的情况下,通过使用手性氨基醇1的不同金属键合模式,已经实现了使用单一手性源进行反应对映选择性的转换。已显示,甲亚甲酰乙炔与丙烯酸叔丁酯进行高度对映体和非对映体选择性的1,3-偶极环加成反应,从而提供两种对映体富集的吡咯烷(见方案)。