Here we report that enol nonaflates exhibit higher reactivity than the corresponding enol triflates in palladium-catalyzed cross-coupling reactions with various (vinyl)tributylstannanes and acetylenes. We also highlight the reaction of a vinyl nonaflate, containing two 1 3 C-labeled carbon atoms with an alkenyl stannane, which afforded the trisubstituted E-olefin stereoselectively in high yield. The
在这里,我们报告烯醇九
氟甲磺酸酯在
钯催化的与各种(
乙烯基)三
丁基锡烷和
乙炔的交叉偶联反应中表现出比相应的烯醇
三氟甲磺酸酯更高的反应性。我们还强调了含有两个 1 3 C 标记的碳原子的
乙烯基九烷基
锡与烯基
锡烷的反应,它以高产率立体选择性地提供了三取代的 E-烯烃。然后将 E-烯烃转化为相应的全 E-
视黄醛。