Stille Cross-Coupling Reactions of Aryl Mesylates and Tosylates Using a Biarylphosphine Based Catalyst System
作者:Stephen L. Buchwald、John R. Naber、Brett P. Fors、Xiaoxing Wu、Jonathon T. Gunn
DOI:10.3987/com-09-s(s)105
日期:——
A catalyst system for the Stille cross-coupling reactions of aryl mesylates and tosylates is reported. Using the combination of Pd(OAc)2, XPhos, and CsF in t-BuOH an array of aryl and heteroaryl sulfonates were successfully employed in these reactions. Morever, heteroarylstannanes, such as furyl, thiophenyl, and N-methylpyrrole, which are often prone to decomposition, were efficiently coupled under
报道了用于甲磺酸芳基酯和甲苯磺酸酯的 Stille 交叉偶联反应的催化剂体系。在 t-BuOH 中使用 Pd(OAc)2、XPhos 和 CsF 的组合,在这些反应中成功地使用了一系列芳基和杂芳基磺酸盐。此外,通常易于分解的杂芳基锡烷,例如呋喃基、噻吩和 N-甲基吡咯,在这些条件下可以有效地偶联。锡烷偶联伙伴上的邻位取代耐受良好;然而,芳基磺酸酯上邻位取代基的存在大大降低了这些反应的效率。