Catalytic 1,4-addition of arylsiloxanes to enones was carried out at 75 °C in the presence of a dicationic palladium(II) catalyst in aqueous 1,4-dioxane. A nitrile-free complex generated in situ from Pd(dba)2 and Cu(BF4)2 in the presence of dppe or dppben was recognized to be the best catalyst to achieve high yields for the representative enones and enals.
在双阳离子
钯 (II) 催化剂存在下,在 1,4-
二恶烷水溶液中,在 75°C 下进行芳基
硅氧烷与烯酮的催化 1,4-加成反应。在 dppe 或 dppben 存在下,由 Pd(dba)2 和 Cu(
BF4)2 原位生成的无腈配合物被认为是实现代表性烯酮和烯醛高产率的最佳催化剂。