5-MePh)2PF-Pcy2) catalyzed the enantioselective arylation of silyl keteneacetals with iodoarenes in the presence of TlOAc to promote transmetalation of silyl keteneacetals. The highest enantioselectivities giving α-arylesters up to 91% ee were achieved when (E)-1-methoxy-1-(trimethylsiloxy)propene (E/Z = 88/12) was used for the silyl keteneacetal. The effect on enantioselection of a chiral ligand is discussed
在TlOAc存在下,钯/(4-MeO-3,5-MePh)2 PF-Pcy 2)催化硅烷基乙烯酮缩醛与碘芳烃的对映选择性芳基化,以促进硅烷基乙烯酮缩醛的金属转移。当将(E)-1-甲氧基-1-(三甲基甲硅烷氧基)丙烯(E / Z = 88/12)用于甲硅烷基烯酮缩醛时,可获得最高91%ee的α-芳基酯的最高对映选择性。基于钯/(4-MeO-3,5-MePh)2 PF-Pcy 2)配合物的X射线结构以及DFT在机械方面的计算研究结果,讨论了对手性配体对映体选择的影响催化循环。