Negishi cross-coupling reactions are described. This method readily provides various enones from enol triflates and diorganozinc reagents with catalytic amounts of nickel(II) chloride–4,4′-dimethoxyl-2,2′-bipyridyl under carbon monoxide atmosphere. The rate of carbon monoxide insertion is increased by the addition of lithium or magnesium halides and the use of polar solvents. Alkenyl iodides can also
描述了催化羰基化的Negishi交叉偶联反应。该方法可在
一氧化碳气氛下,从烯醇
三氟甲磺酸酯和二
有机锌试剂中轻松地提供催化量的
氯化镍(II)–4,4'-二甲氧基-1,2'-联
吡啶基提供的各种烯酮。
一氧化碳的插入速率通过添加卤化
锂或卤化
镁以及使用极性溶剂来提高。也可以使用烯基
碘化物代替烯醇
三氟甲磺酸酯。