Abstract
The ε-benzylation of γ-alkenyl-γ-oxidized enals via dual photoredox and N-heterocyclic carbene catalysis has been developed, affording the corresponding ε-benzyl-α,β-γ,δ-bisunsaturated esters in moderate to good yields with exclusive regioselectivities. The reaction is proposed via the generation of benzyl radical under photocatalysis, followed by its addition to an NHC-bound trienolate intermediate.
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