Synergizing palladium with Lewis base catalysis for stereodivergent coupling of 1,3-dienes with pentafluorophenyl acetates
作者:Qinglong Zhang、Minghui Zhu、Weiwei Zi
DOI:10.1016/j.chempr.2022.07.014
日期:2022.10
carbonyl compounds is one of the most powerful tools for atom-economical construction of the Csp3–Csp3 bond. Although many methods have been established for the coupling of 1,3-dienes, stereodivergent variants remain a formidable challenge because of their innate stereoselective bias (syn- or anti-) in a single catalyst system. Herein, we report a synergistic Pd/Lewis-base-catalyzed stereodivergent coupling
1,3-二烯与羰基化合物的不对称偶联是原子经济地构建 Csp 3 -Csp 3键的最有力工具之一。尽管已经建立了许多用于偶联 1,3-二烯的方法,但立体发散变体仍然是一个巨大的挑战,因为它们具有先天的立体选择性偏差(顺或反-) 在单一催化剂体系中。在此,我们报告了 1,3-二烯与乙酸五氟苯酯的协同 Pd/Lewis 碱催化立体发散偶联。只需改变两种催化剂的相对手性,就可以从同一对底物选择性地获得偶联产物的所有四种立体异构体。再加上五氟苯基部分的后期转化,该方法为制备各种具有邻位立体中心的手性分子提供了通用方法。