Methylenecyclopropanes in [4+1] Cycloaddition with Enones

[摘要]：A nickel-catalyzed [4 + 1] cycloaddition of enones with methylenecyclopropanes leading to dihydrofurans was developed. The reaction outcome is attributed to the transformation of methlenecyclopropane, which is incorporated Into a five-membered ring as a one-carbon fragment.

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