Direct Asymmetric α-Allylation of Aldehydes with Simple Allylic Alcohols Enabled by the Concerted Action of Three Different Catalysts
作者:Gaoxi Jiang、Benjamin List
DOI:10.1002/anie.201103263
日期:2011.9.26
catalysis: The title reaction between α‐branched aldehydes and allylic alcohols, which generates all‐carbon quaternary stereogenic centers, constitutes the first asymmetric Tsuji–Trost‐type α‐allylation of carbonyl compounds with allylic alcohol (see scheme). This reaction is catalyzed by three different species, [Pd(PPh3)4], the chiral Brønsted acid TRIP, and benzhydryl amine.
三重催化:α-支链醛与烯丙基醇之间的标题反应生成全碳的季立体中心,这是羰基化合物与烯丙醇的第一个不对称Tsuji-Trost型α-烯丙基化反应(参见方案)。该反应由三种不同的物种[Pd(PPh 3)4 ],手性布朗斯台德酸TRIP和苯甲基胺催化。