Stereospecific Palladium-Catalyzed Cross-Coupling of (<i>E</i>)- and (<i>Z</i>)-Alkenylsilanolates with Aryl Chlorides
作者:Scott E. Denmark、Jeffrey M. Kallemeyn
DOI:10.1021/ja065988x
日期:2006.12.1
geometrically defined (E)- and (Z)-alkenyl- and styrylsilanolates with a wide variety of aromatic and heteroaromatic chlorides has been achieved. Under catalysis by bulky, biphenyl-derived phosphines and allylpalladium chloride, the (preformed, stable) potassium salts of di-, tri- and tetrasubstituted alkenyldimethylsilanols undergo high yielding and highly stereospecific coupling to aryl chlorides in THF or dioxane
已经实现了几何定义的 (E)-和 (Z)-烯基-和苯乙烯基硅烷醇化物与多种芳族和杂芳族氯化物的交叉偶联。在庞大的联苯衍生的膦和烯丙基氯化钯的催化下,二、三和四取代的烯基二甲基硅烷醇的(预先形成的、稳定的)钾盐在 THF 或二恶烷中与芳基氯化物发生高产率和高度立体有择的偶联。多种官能团与这些反应条件相容,包括硝基、酯、酮和腈。(E)- 和 (Z)- 链烯基硅烷醇化物都具有几乎相同的速率和效率。