6-tris(trifluoromethyl)phenyl, 1) has been synthesized. In C6D6 solution this organoborane and pyridine form a frustrated Lewis pair. Under mild conditions, 1 can efficiently catalyze 1,4-hydroboration of a series of pyridines. This reaction is highly chemo- and regioselective. The reaction intermediate, a boronium complex [Py2Bpin][Ar(F)2B(H)Me] (3), was characterized in solution by NMR spectroscopy, which
已经合成了体积大的有机
硼烷 Ar(F)2BMe (Ar(F) = 2,4,6-三(三
氟甲基)苯基,1)。在 C6D6 溶液中,这种有机
硼烷和
吡啶形成受挫的路易斯对。在温和条件下,1可以有效催化一系列
吡啶的1,4-
硼氢化反应。该反应具有高度的
化学和区域选择性。反应中间体,
硼配合物 [Py2Bpin][Ar(F)2B(H)Me] (3),通过 NMR 光谱在溶液中表征,这也通过 DFT 计算得到证实。