Influence on the enantioselectivity in allylic alkylation of the anomeric position of the phosphine-amide ligands derived from d-glucosamine
作者:Katarzyna Glegoła、Eric Framery、Catherine Goux-Henry、K. Michał Pietrusiewicz、Denis Sinou
DOI:10.1016/j.tet.2007.04.098
日期:2007.7
The synthesis of a new series of chiral phosphine amides derived from d-glucosamine is described. The palladium-catalyzed asymmetric allylicalkylations of racemic (E)-1,3-diphenyl-2-propenyl acetate with dimethyl malonate using these ligands have been investigated. The results obtained and the NMR studies of free ligands and of their Pd-complexes obtained from dimer [(η3-C3H5)PdCl]2 revealed the mode
描述了衍生自d-葡萄糖胺的一系列新的手性膦酰胺的合成。已经研究了使用这些配体的钯催化的外消旋(E)-1,3-二苯基-2-丙烯基乙酸酯与丙二酸二甲酯的外消旋(E)-1,3-二苯基-2-丙烯基乙酸钯的不对称烯丙基烷基化反应。所获得的结果和游离配位体,并从所得的钯复合物的NMR研究二聚物[(η 3 -C 3 H ^ 5)的PdCl] 2显示络合的模式和结构和取代基的性质的影响在所研究的不对称烯丙基烷基化反应的对映选择性的异头位置上。