An efficient method to synthesize tetracoordinated N,C-chelate organoboron compounds is described. The metal-free CH borylation reactions of 2-arylpyridine derivatives with TfOBⁿBu₂ proceeds smoothly to yield 2-(2-dibutylborylaryl)pyridine derivatives in satisfactory to excellent yields. Different substituents, such as methyl, methoxy, fluoro, chloro, bromo, and carbonyl, on 2-arylpyridine are tolerated under optimal reaction conditions.

中文翻译：

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通过TfOB ⁿ Bu ₂芳基-N-杂芳烃的C H硼化，方便地合成四配位有机硼化合物

描述了一种合成四配位N，C-螯合物有机硼化合物的有效方法。2-芳基吡啶衍生物与TfOB ⁿ Bu ₂的无金属C H硼化反应顺利进行，以令人满意的至优异的产率产生2-（2-二丁基硼基芳基）吡啶衍生物。在最佳反应条件下，可以耐受2-芳基吡啶上的不同取代基，例如甲基，甲氧基，氟，氯，溴和羰基。