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Scope of quaternary center formation. Yields are for the isolated purified alcohol product (following the oxidation step), unless noted otherwise. Yields in parentheses were determined by 1H NMR analysis of the crude reaction mixture with an internal standard. [a] Isolated as the Bpin product. [b] The 1,1-arylboration product was also observed (20% yield as determined by NMR analysis). Boc= tert-butoxycarbonyl.
