The organocatalytic enolization of 2‐arylacetamides, followed by an enantioselective intramolecular conjugate addition to tethered 2,5‐cyclohexadienones, yielding 3D fused N‐heterocycles, is described. The transformation represents the first strong activating group‐free activation of carboxamides via α‐C−H deprotonation in a metal‐free, catalytic, and enantioselective reaction, and is achieved by employing a bifunctional iminophosphorane (BIMP) superbase.
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Poh et al. (2023) studied this question.
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