Reported herein is an unprecedented dual iron/palladium‐catalyzed reductive cross‐coupling of alkenyl bromides and bromodifluoromethanes with manganese as the reductant. This methodology leads to the efficient construction of a series of gem‐difluoroallylenes under mild reaction conditions without requiring the addition of stoichiometric amounts of catalyst. Preliminary mechanism investigations indicate that the radical pathway might not be involved in this novel dual transition metal catalyzed reaction.

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The title compound, C 23 H 18 BrFN 2 O 4 , contains two chiral carbon centres and the absolute configuration has been confirmed as (1R,2S). The dihedral angles between the three phenyl rings are 12.4 (4), 34.2 (4) and 44.5 (4) . In the crystal, molecules are linked by N-HÁ Á ÁO hydrogen bonds into chains, which which are further connected by C-HÁ Á ÁO interactions, generating a three dimensional network structure.