Herein we exploit a catalytic amount of [Ph₃C]⁺ to initiate B–X to B–H bond conversion with Et₃SiH. This was applied to 6 haloboranes. However, 9-X-9-borabicyclo[3.3.1]nonane (B-X-9-BBN, X = F, Br) reacts directly with silane. Thus, C–F bond activation of benzyl fluorides in the presence of arenes afforded the Friedel–Crafts (FC) products using B–H-9-BBN in the presence of Et₃SiH. This catalysis was probed with a range of arenes and several benzyl fluoride derivatives. The protocol is simple, cheap and a convenient route to 1,1-diarylmethanes from benzyl fluorides in good to excellent yields (up to 99%) under mild conditions.

中文翻译：

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B-X 到 B-H 转化的探索及其在 C-F 键活化催化中的应用

在此，我们利用催化量的 [Ph ₃ C] ⁺启动 B-X 到 B-H 键与 Et ₃ SiH 的转化。这适用于 6 种卤代硼烷。然而，9-X-9-borabicyclo[3.3.1]nonane (BX-9-BBN, X = F, Br) 直接与硅烷反应。_{因此，在存在芳烃的情况下，苄基氟化物的 C-F 键活化在 Et 3} SiH 存在的情况下使用 B-H-9-BBN 提供 Friedel-Crafts (FC) 产品。用一系列芳烃和几种苄基氟衍生物探索了这种催化作用。该方案简单、便宜且是从苄基氟化物到 1,1-二芳基甲烷的便捷途径，在温和条件下产量高（高达 99%）。