Ni-Catalyzed Alkylative Dimerization of Vinyl Grignard Reagents Using Alkyl Fluorides
作者:Jun Terao、Hiroyasu Watabe、Nobuaki Kambe
DOI:10.1021/ja042565r
日期:2005.3.1
Alkyl halides underwent unique cross-coupling reaction with vinylmagnesium chloride in the presence of Ni catalyst to give 2-alkyl-3-butenyl Grignard reagent (1) in high yields. This reaction proceeded efficiently at 25 degrees C in THF using primary and secondary alkyl fluorides. On the other hand, PhCH=CHMgBr gave double alkylative vinyl coupling product 4 in good yield as the sole coupling product
烷基卤化物在 Ni 催化剂存在下与乙烯基氯化镁发生独特的交叉偶联反应,以高产率得到 2-烷基-3-丁烯基格氏试剂 (1)。该反应在 25 摄氏度的 THF 中使用伯和仲烷基氟化物有效进行。另一方面,PhCH=CHMgBr 以良好的产率得到双烷基化乙烯基偶联产物 4 作为唯一的偶联产物。与相应的氯化物、溴化物和碘化物相比,烷基氟是最合适的烷基化试剂。