Asymmetric direct Mannich reaction catalyzed by chiral Bronsted acid via activation of enecarbamate as an aliphatic imine alternative.

[摘要]：An enantioselective direct Mannich reaction of acetylacetone with enecarbamates via protonation by a chiral monophosphoric acid catalyst is achieved, demonstrating the utility of in situ generation of unstable aliph. imines.

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