Synthesis, Structure of Borylmagnesium, and Its Reaction with Benzaldehyde to Form Benzoylborane
Journal of the American Chemical Society2007Vol. 129(31), pp. 9570–9571
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Abstract
The reaction of boryllithium 2 with 1.0 or 0.5 equiv of MgBr2·OEt2 provided boryl Grignard reagents, borylmagnesium bromides 3 and 4, or bis(boryl)magnesium 5. Structures of 3, 4, and 5 in the crystals and solutions indicated the ionic character of the B−Mg bonds. The reactivity of borylmagnesium 3 with benzaldehyde was different from that of boryllithium 2. Benzoylborane 7 was fully characterized as the first acylborane.
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