Furanoside phosphite–phosphoroamidite and diphosphoroamidite ligands applied to asymmetric Cu-catalyzed allylic substitution reactions
作者:Marc Magre、Javier Mazuela、Montserrat Diéguez、Oscar Pàmies、Alexandre Alexakis
DOI:10.1016/j.tetasy.2012.01.003
日期:2012.1
A phosphite–phosphoroamidite and diphosphoroamidite ligand library was applied in the Cu-catalyzed allylic substitution of a range of cinnamyl-type substrates using several organometallic nucleophiles. Results indicated that selectivity depended strongly on the ligand parameters (position of the phosphoroamidite group at either C-5 or C-3 of the furanoside backbone, as well as the configuration of
使用多种有机金属亲核试剂,将亚磷酸酯-亚磷酰胺和二亚磷酰胺配体库应用于铜催化的一系列肉桂基类型底物的烯丙基取代。结果表明,选择性很大程度上取决于配体参数(呋喃糖苷主链的C-5或C-3处的亚磷酰胺基团的位置,以及C-3的构型,引入的第二亚磷酰胺部分,取代基)和亚磷酸亚芳基酯/亚磷酰胺基部分的构型,底物的离去基团的性质和烷基化试剂。获得了良好的对映选择性(高达76%)和活性,并具有较高的区域选择性。