Nickel-Catalyzed Regioselective Three Component Coupling Reaction of Alkyl Halides, Butadienes, and Ar-M (M=MgX, ZnX)
作者:Jun Terao、Shinsuke Nii、Firoz A. Chowdhury、Akifumi Nakamura、Nobuaki Kambe
DOI:10.1002/adsc.200404041
日期:2004.7
cross-coupling reaction of alkyl halides, 1,3-butadienes, and aryl-Grignard reagents has been developed by the use of a nickel catalyst. This reaction proceeds efficiently at 25 °C using (dppf)NiCl2 as a catalyst. Alkyl chlorides, bromides, and iodides can be used as suitable alkylating reagents. The reaction also proceeds when arylzinc halides are used instead of Grignard reagents. Competitive reactions of a
通过使用镍催化剂,已经开发出一种新的方法用于烷基卤化物,1,3-丁二烯和芳基-格利雅试剂的区域选择性三组分交叉偶联反应。使用(dppf)NiCl 2作为催化剂,该反应在25℃下有效地进行。烷基氯化物,溴化物和碘化物可用作合适的烷基化试剂。当使用芳基锌卤化物代替格氏试剂时,该反应也会进行。伯,仲和叔烷基溴的混合物的竞争反应表明,卤化物的反应性按伯<仲<叔的顺序增加。提出了一种可能的反应途径,涉及从镍酸酯络合物到卤代烷的单电子转移。