Well‐defined Cp*Co(III)‐catalyzed Hydrogenation of Carbonates and Polycarbonates,ChemCatChem

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Well‐defined Cp*Co(III)‐catalyzed Hydrogenation of Carbonates and Polycarbonates
ChemCatChem ( IF 3.8 ) Pub Date : 2020-11-19 , DOI: 10.1002/cctc.202001490
Pardeep Dahiya ₁ , Manoj Kumar Gangwar ₁ , Basker Sundararaju ₁

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We herein report the catalytic hydrogenation of carbonates and polycarbonates into their corresponding diols/alcohols using well‐defined, air‐stable, high‐valent cobalt complexes. Several novel Cp*Co(III) complexes bearing N,O‐chelation were isolated for the first time and structurally characterized by various spectroscopic techniques including single crystal X‐ray crystallography. These novel Co(III) complexes have shown excellent catalytic activity to produce value added diols/alcohols from carbonate and polycarbonates through hydrogenation using molecular hydrogen as sole reductant or ⁱPrOH as transfer hydrogenation source. To demonstrate the developed methodology's practical applicability, we have recycled the bisphenol A monomer from compact disc (CD) through hydrogenation under the established reaction conditions using phosphine‐free, earth‐abundant, air‐ and moisture‐stable high‐valent cobalt catalysts.

中文翻译：

明确定义的Cp * Co（III）催化的碳酸盐和聚碳酸酯加氢

我们在此报告了使用定义明确，对空气稳定的高价钴络合物将碳酸酯和聚碳酸酯催化氢化为相应的二醇/醇。首次分离了几种带有N，O螯合的新型Cp * Co（III）配合物，并通过包括单晶X射线晶体学在内的各种光谱技术对其结构进行了表征。这些新颖的Co（III）配合物表现出优异的催化活性，以产生增值的二醇/使用分子氢作为唯一还原剂或从碳酸盐醇和聚碳酸酯通过氢化^我PrOH作为转移加氢源。为了证明所开发的方法的实际适用性，我们在既定的反应条件下，使用无磷，富含地球，空气和水分稳定的高价钴催化剂，通过加氢回收了光盘（CD）中的双酚A单体。

更新日期：2020-11-19

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