Palladium- or nickel-catalyzed cross-coupling reactions of 2-substituted cyclohexenes, which are generally less reactive than those having no substituent at the C2 position, with organotin reagents (Migita-Kosugi-Stille coupling) or with Grigard reagents (Kumada-Tamao-Corriu coupling) using a NHC as a ligand was investigated. It was found that NHCs are effective as ligands for these reactions, giving the corresponding cross-coupling products in good yields.
研究了
钯或
镍催化的 2-取代
环己烯与
有机锡试剂的交叉偶联反应(Migita-Kosugi-Stille 偶联)或以 NHC 为
配体与 Grigard 试剂的交叉偶联反应(Kumada-Tamao-Corriu 偶联)。研究发现,NHC 是这些反应的有效
配体,能以良好的产率得到相应的交叉偶联产物。