A new Mn‐catalyzed alkylation of secondary alcohols with non‐activated alcohols is presented. The use of a stable and well‐defined manganese pincer complex, stabilized by a PNN ligand, together with a catalytic amount of base enabled the conversion of renewable alcohol feedstocks to a broad range of higher‐value alcohols in good yields with water as the sole byproduct. The strategy eliminates the need for exogenous and detrimental alkyl halides as well as the use of noble metal catalysts, making the C‐alkylation through double hydrogen autotransfer a highly sustainable and environmentally benign process. Mechanistic investigations support a hydrogen autotransfer mechanism in which a non‐innocent ligand plays a crucial role.

中文翻译：

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锰催化双氢自动转移通过伯醇实现仲醇的C-烷基化

提出了一种新的锰催化仲醇与非活化醇的烷基化反应。通过使用PNN配体稳定的稳定且定义明确的锰钳子配合物以及催化量的碱，能够将水作为唯一的可再生酒精原料以高收率转化为多种高价值醇副产品。该策略消除了对外来有害的烷基卤化物的需要，也不再需要使用贵金属催化剂，从而使通过双氢自动转移进行的C-烷基化成为高度可持续且对环境无害的过程。机理研究支持氢自动转移机制，其中非纯配体起着至关重要的作用。