Mechanical metal activation for Ni-catalyzed, Mn-mediated cross-electrophile coupling between aryl and alkyl bromides
作者:Sisi Wu、Weijia Shi、Gang Zou
DOI:10.1039/d1nj01732b
日期:——
nickel-catalyzed, manganese-mediated cross-electrophile coupling between aryl and alkyl bromides. In addition to the traditional reaction parameters, mechanical ones, e.g. the rotational speed of mill, the filling degree of jar and ball size, have been found to affect the catalytic efficiency remarkably, implying the involvement of the regeneration of nickel(0) species in the rate-determining steps. A combined evaluation
液体辅助研磨已成功应用于消除镍催化、锰介导的芳基和烷基溴之间的交叉亲电偶联中对化学活化剂和无水溶剂的要求。除了传统的反应参数外,机械参数,如磨机的转速、罐子的填充程度和球的大小,已被发现显着影响催化效率,这意味着镍 (0) 物种的再生参与了速率决定步骤。对反应和机械参数的综合评估导致了最佳条件,在该条件下,各种n具有各种官能团的烷基芳烃可以在 1 mol% 的催化剂负载下以良好的收率轻松获得。液体辅助研磨使芳基/烷基交叉亲电偶联的实际应用已在 6-甲氧基四氢萘酮的克级合成中得到证明。