Oxidative nucleophilic α-hydrogen substitution is a direct method for BODIPY functionalization. However, it was hampered by the low reactivity of BODIPYs toward weak nucleophiles. Herein, we develop a cation radical accelerated oxidative nucleophilic α-hydrogen substitution reaction between BODIPY dyes and a variety of alcohols. This direct C–H alkoxylation presented a wide substrate scope and high site selectivity, providing a series of α-alkoxylated BODIPYs with diverse functional groups. Moreover, a BODIPY derivative with a pyridinium ion was developed as a new mitochondria-targeting fluorescent probe with favorable photophysical properties.

中文翻译：

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通过阳离子自由基加速氧化亲核氢取代对BODIPY染料进行直接C–H烷氧基化：一条为功能化BODIPYs构建基团的新途径

氧化亲核α-氢取代是BODIPY功能化的直接方法。然而，它被BODIPY对弱亲核试剂的低反应性所阻碍。在本文中，我们开发了BODIPY染料与多种醇之间的阳离子自由基加速氧化亲核α-氢取代反应。这种直接的C–H烷氧基化反应显示了广泛的底物范围和高的位点选择性，提供了一系列具有不同官能团的α-烷氧基化BODIPY。此外，具有吡啶鎓离子的BODIPY衍生物被开发为具有良好光物理性质的靶向线粒体的新型荧光探针。