Scope and Limitations of Palladium-Catalyzed Cross-Coupling Reactions with Organogold Compounds
作者:A. Stephen K. Hashmi、René Döpp、Christian Lothschütz、Matthias Rudolph、Dominic Riedel、Frank Rominger
DOI:10.1002/adsc.201000159
日期:——
Five different alkenylgold(I) phosphane complexes were prepared and then investigated in [1,1′‐bis(diphenylphosphino)ferrocene]palladium(II) dichloride‐catalyzed cross‐coupling reactions with different aryl halides, heterocyclic halides, an alkenyl halide, an alkynyl halide, allylic substrates, benzyl bromide and an acid chloride. With regard to the halides, the iodides were highly reactive, bromides
制备了五种不同的烯基金(I)膦络合物,然后在[1,1'-双(二苯基膦基)二茂铁]二氯化钯(II)催化的交叉偶联反应中与不同的芳基卤化物,杂环卤化物,烯基卤化物,炔基卤,烯丙基底物,苄基溴和酰氯。关于卤化物,碘化物是高反应性的,溴化物或氯化物的收率大大降低或失败,烯丙基乙酸酯也失败。交叉偶联伙伴包含许多不同的官能团,而游离羧酸则不提供交叉偶联产物,而o,o二取代的芳烃也失效,其他广泛的官能团如硝基,腈基,酯基,α,β-不饱和酯基和内酯,醛,烷氧基,吡啶基,噻吩基,未保护的酚和苯胺,甚至芳基叠氮化物也是可以耐受的。通过晶体结构分析证明了一种烯基金(I)物种和四种交叉偶联产物的结构。