A nickel-catalyzed reductive dimerization of bromocyclobutenes to produce unusual and unprecedented cyclobutene dimers was developed. In a stereoconvergent procedure, various bromocyclobutenes were readily dimerized in good yields, with good diastereoselectivities and broad functional group tolerance. Notably, the presence of a carbonyl group in the starting material appears to dictate diastereoselectivity.
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Univ Toronto, Dept Chem, Davenport Res Labs, 80 St George St, Toronto, ON M5S 3H6, CanadaUniv Toronto, Dept Chem, Davenport Res Labs, 80 St George St, Toronto, ON M5S 3H6, Canada
Graham, Joshua M.
Rousseaux, Sophie A. L.
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Univ Toronto, Dept Chem, Davenport Res Labs, 80 St George St, Toronto, ON M5S 3H6, CanadaUniv Toronto, Dept Chem, Davenport Res Labs, 80 St George St, Toronto, ON M5S 3H6, Canada