A Cu(I)‐catalyzed regioselective cross‐dehydrogenative coupling of indoline with a variety aryl and alkyl carboxylic acids is described. The divergent process for the oxygenation was achieved in satisfactory yields under additive free conditions, which provides an efficient strategy for the regioselective C7 functionalization of indolines using inexpensive copper catalyst. Oxygen as the sole oxidant is required in this protocol. The method is tolerated by a wide range of functional groups. Preliminary mechanistic study provided support for a reversible C−H bond metallation step.

中文翻译：

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Cu（I）以O2为唯一氧化剂催化吲哚的位点选择性酰氧基化

描述了吲哚与各种芳基和烷基羧酸的Cu（I）催化区域选择性交叉脱氢偶联。在无添加剂的条件下以令人满意的收率实现了氧合发散过程，这为使用廉价的铜催化剂进行二氢吲哚的区域选择性C7官能化提供了有效的策略。在此规程中需要氧气作为唯一氧化剂。广泛的官能团可以耐受该方法。初步的力学研究为可逆的CH键金属化步骤提供了支持。