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Reactions were conducted on 0.50 mmol scale. Standard reaction conditions employed butadiene monoxide (1.0 equiv), alkyltrifluoroborate (1.5 equiv), Ir[dFCF3ppy]2(bpy)PF6 (2 mol %), [Ni(dtbbpy)(H2O)4]Cl2 (3 mol %), and 2,6-lutidine (3.5 equiv) in acetone/MeOH (9:1). aFor α-alkoxyalkyltrifluoroborates, a solvent mixture of acetonitrile/tert-butanol (10:1) was used.
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