Cobalt- and rhodium-catalyzed cross-coupling reaction of allylic ethers and halides with organometallic reagents
作者:Hiroto Yasui、Keiya Mizutani、Hideki Yorimitsu、Koichiro Oshima
DOI:10.1016/j.tet.2005.11.032
日期:2006.2
Reactions of 2-alkenyl methyl ether with phenyl, trimethylsilylmethyl, and allyl Grignard reagents in the presence of cobalt(II) complexes are discussed. The success of the reactions heavily depends on the combination of the substrate, ligand, and Grignard reagent. In the reaction of cinnamyl methyl ether, the formation of the linear coupling products predominates over that of the relevant branched
讨论了2-烯基甲基醚与苯基,三甲基甲硅烷基甲基和烯丙基格氏试剂在钴(II)配合物存在下的反应。反应的成功在很大程度上取决于底物,配体和格氏试剂的组合。在肉桂基甲基醚的反应中,线性偶联产物的形成比相关支链产物的形成更占优势。在烯丙基醚的钴催化的烯丙基化中,添加二膦配体可以改变区域选择性,主要提供相应的支链产物。铑配合物分别催化烯丙基醚和卤化物与烯丙基氯化镁和烯丙基溴化锌的反应,其中支链偶联产物是主要产物。