A method for direct cross coupling between unactivated C(sp3)-H bonds and chloroformates has been accomplished via nickel and photoredox catalysis. A diverse range of feedstock chemicals, such as (a)cyclic alkanes and toluenes, along with late-stage intermediates, undergo intermolecular C-C bond formation to afford esters under mild conditions using only 3 equiv of the C-H partner. Site selectivity is predictable according to bond strength and polarity trends that are consistent with the intermediacy of a chlorine radical as the hydrogen atom-abstracting species.

中文翻译：

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使用 Ni-光氧化还原催化从烷烃直接形成 C-C 键

通过镍和光氧化还原催化，实现了未活化的 C(sp3)-H 键和氯甲酸酯之间直接交叉偶联的方法。多种原料化学品，例如 (a) 环烷烃和甲苯，以及后期中间体，仅使用 3 当量的 CH 伙伴，在温和条件下形成分子间 CC 键即可生成酯。位点选择性是根据键强度和极性趋势来预测的，这与氯自由基作为氢原子抽象物种的中间作用一致。