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Pd/tetraphosphine catalytic system for Cu-free Sonogashira reaction 'on water'

机译:PD/四膦催化系统,用于无CU的SONOgashira反应“水”

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摘要

An efficient copper-free Sonogashira coupling reaction was performed on water at 100 °C with N,N,N',N'-tetra(diphenylphosphinomethyl)pyridine-2,6-diamine (1) as a ligand, [Pd(η~3-C3Hs)Cl]2 as a catalyst precursor and K3PO4 as a base. Both aryl and heteroaryl halides were successfully alkynylated in this system, and a high turnover number (TON) up to 860 000 was obtained with a catalyst loading as low as 1 ppm.
机译:用N,N,N',N'-TETRA(二苯基磷酸甲基)吡啶-2,6-二胺(1)作为配体作为配体,在100°C的水上在水上进行有效的无铜Sonogashira偶联反应。 3-C3HS)Cl] 2作为催化剂前体,而K3PO4作为基础。 芳基和杂芳基在该系统中都成功地烷基化了酸性,并且以低至1 ppm的催化剂载荷可获得高达860 000的高周转数(吨)。

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