preparation of styrene derivatives is described on the basis of the activation of aryl halides by low-valent cobalt species. A combination of CoII bromide and 2,2′-bipyridine is suitable as catalyst for the cross-coupling reaction of a wide range of aromatic halides (X = Cl, Br, I), mostly bearing sensitive moieties, with vinyl acetates. These reactions proceed under mild conditions in the presence of the appropriate
基于低价
钴物质对芳基卤化物的活化,描述了一种制备
苯乙烯衍
生物的新方法。CoII
溴化物和
2,2'-联吡啶的组合适合作为
催化剂,用于广泛的芳族卤化物(X = Cl、Br、I)与
醋酸乙烯酯的交叉偶联反应,主要带有敏感部分。这些反应在适当的还原剂存在下在温和条件下进行,以令人满意的高产率提供 α-取代的
苯乙烯化合物。(© Wiley-
VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)