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Pyridine Hydroboration with a Diazaphospholene Precatalyst

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journal contribution
posted on 15.02.2018, 16:38 by Toren Hynes, Erin N. Welsh, Robert McDonald, Michael J. Ferguson, Alexander W. H. Speed
We demonstrate pyridine hydroboration catalyzed by a diazaphospholene hydride precatalyst. Pyridines bearing electron-withdrawing groups in the 3-position are hydroborated efficiently. This system features low catalyst loadings, fast reaction times at ambient temperature, and tolerance of other reducible functionality. Off-cycle products of pyridine hydrophosphination were also obtained in one case from a stoichiometric reaction and structurally characterized.