Chiral‐at‐metal bis‐cyclometalated iridium(III) complexes are introduced as a new class of chiral catalysts for the reaction of epoxides with CO₂ to form cyclic carbonates under conditions of kinetic resolution. Reactions are typically performed at room temperature in the presence of 1 mol % of iridium catalyst and 1.5 mol % of tetraethylammonium bromide as the nucleophilic cocatalyst to provide selectivity factors of up to 16.6. A variety of monosubstituted epoxides, including styrene epoxide, epoxides with aliphatic side chains, glycidyl ethers, and a glycidyl ester, are found to be suitable substrates. No polymerization side reaction is observed for any of the investigated substrates.

中文翻译：

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手性铱配合物催化CO2催化环氧化合物的动力学拆分

手性金属双环金属化铱（III）配合物被引入为一类新的手性催化剂，用于在动力学拆分条件下使环氧化物与CO ₂反应形成环状碳酸酯。反应通常在室温下在作为亲核助催化剂的1摩尔％的铱催化剂和1.5摩尔％的四乙基溴化铵存在下进行，以提供至多16.6的选择性。发现各种单取代的环氧化物是合适的底物，包括苯乙烯环氧化物，具有脂族侧链的环氧化物，缩水甘油基醚和缩水甘油基酯。对于所研究的任何底物均未观察到聚合副反应。