There is no precedent for the usage of transition metal carbamoyl complexes (typical hydrogenase models) as pre-catalysts for oxidation or CO₂ utilization purposes. In this work, we describe that carbamoyl-Mn(I) complexes are capable of selectively catalyzing both epoxidation of olefins and epoxides with carbon dioxide to form cyclic carbonates. The dual-role catalytic system was well adapted to a wide range of aromatic olefins, and the desired cyclic carbonates were obtained in moderate to excellent yields. Mechanistic investigations indicated that active Mn(II)-oxo and Mn(III)-oxo species were involved in the oxidation process.

中文翻译：

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用于烯烃环氧化和环氧化物环加成二氧化碳的氨基甲酰锰络合物

没有使用过渡金属氨基甲酰络合物（典型的氢化酶模型）作为用于氧化或 CO ₂利用目的的预催化剂的先例。在这项工作中，我们描述了氨基甲酰基-Mn(I) 配合物能够选择性地催化烯烃和环氧化物与二氧化碳的环氧化反应以形成环状碳酸酯。双作用催化体系很好地适应了广泛的芳烃，并以中等到优异的产率获得了所需的环状碳酸酯。机理研究表明，活性 Mn(II)-oxo 和 Mn(III)-oxo 物种参与了氧化过程。