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首页> 外文期刊>Catalysis science & technology >Palladium complexes grafted onto mesoporous silica catalysed the double carbonylation of aryl iodides with amines to give a-ketoamidest
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Palladium complexes grafted onto mesoporous silica catalysed the double carbonylation of aryl iodides with amines to give a-ketoamidest

机译:接枝到介孔二氧化硅上的钯络合物用胺用胺的双羰基催化了氨基碘的双羰基化。

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摘要

A promising route for the double carbonylation of aryl iodide derivatives with secondary and primary amines to produce a-ketoamides is described using covalently immobilized palladium complexes on SBA-15 silica. Adequate adjustments of the different reaction parameters (temperature, CO pressure, nature of base, solvent, substrate...) to achieve optimal catalyst performance were made using PdCl2(PPh2)2@SBA-15 as catalytic system. High conversions (up to 80%) and excellent selectivities (up to 96%) for the double carbonylated α-ketoamide products were obtained using K2CO3 as base, MEK or DMF as solvent and a 1 mol% [Pd] catalyst. We also demonstrated that two other palladium hybrid mesoporous materials can be alternatively used, namely PdCl2(PCy2)2@SBA-15 and PdCl2(PNP)@SBA-15, without loss of activity and selectivity. Finally, catalyst recycling of PdCl2(PPh2)2@SBA-15 showed that the catalyst could be reused for up to 3 cycles without affecting catalyst performance.
机译:使用在SBA-15二氧化硅上共价固定化的钯络合物来描述一种具有二次胺和原代胺的芳基碘化衍生物的有前途的途径。 使用PDCL2(PPH2)2@SBA-15作为催化系统,对不同的反应参数(温度,CO压力,碱的性质,溶剂性质,底物...)进行了充分调整。 使用K2CO3作为碱,MEK或DMF作为溶剂和1 mol%[PD]催化剂,获得了高转化率(最高80%)和优异的选择性(高达96%),以双羰基α-酮酰胺产物为基础。 我们还证明,可以使用其他两种钯杂交介孔材料,即PDCL2(PCY2)2@SBA-15和PDCL2(PNP)@SBA-15,而不会丧失活动和选择性。 最后,PDCL2(PPH2)2@SBA-15的催化剂回收表明,可以将催化剂重新用于最多3个循环,而不会影响催化剂性能。

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