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首页> 外文期刊>Chemistry: A European journal >Mechanism and Applications of the Photoredox Catalytic Coupling of Benzyl Bromides
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Mechanism and Applications of the Photoredox Catalytic Coupling of Benzyl Bromides

机译：苄基溴的光氧化还原催化偶联的机理与应用

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摘要

The photoredox catalytic coupling of halomethyl arenes to bibenzyl derivatives has been demonstrated. The catalytic protocol employed the Hantzsch ester, potassium phosphate, and a photoactive cyclometalated Ir-III complex catalyst. A photochemical quantum yield as high as 20% was obtained. The catalytic mechanism was investigated in detail by performing photophysical and electrochemical measurements, as well as by quantum chemical calculations. The results suggest that two-electron mediation might be responsible for the improved photon economy. The reaction protocol was compatible with halomethyl arenes that contain a variety of functional groups. Finally, the synthetic utility of our protocol was demonstrated by the preparation of a natural dihydrostilbenoid, brittonin A.
机译：已经证明卤代甲基芳烃与联苄衍生物的光氧化还原催化偶联。催化方案使用Hantzsch酯，磷酸钾和光敏环金属化Ir-III络合物催化剂。获得了高达20％的光化学量子产率。通过进行光物理和电化学测量以及量子化学计算，详细研究了催化机理。结果表明，双电子介导可能是改善光子经济的原因。该反应方案与含有多种官能团的卤代甲基芳烃兼容。最后，我们的方案的合成实用性通过制备天然的二氢芪类化合物布列通A来证明。

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