A scalable synthetic method is described for both the preparation of ultrasmall palladium nanoparticles and their subsequent use in catalyzing an α-arylation reaction of nitriles in aqueous micelles. This method involves the intermediacy of carbanions or keteniminates, which are presumably stabilized by the micellar environment rather than being quenched with water. These Pd nanoparticles are thoroughly
描述了可扩展的合成方法,用于制备超小
钯纳米颗粒及其在催化胶束中腈的α-芳基化反应中的后续应用。该方法涉及碳负离子或酮
亚胺的中间产物,据推测是由胶束环境稳定的,而不是用
水淬灭的。这些Pd纳米粒子已被彻底表征。使用31 P NMR光谱的机理研究表明,
膦配体与Pd表面结合,而对照实验证实了
钯的零氧化态。超过35个示例演示了转换的范围,其中一个示例的大小为50 g。