Atropselective synthesis of N-aryl pyridones via dynamic kinetic resolution enabled by non-covalent interactions

The dynamic kinetic resolution of C-N atropisomeric pyridones was achieved via asymmetric phase-transfer catalysis, exploiting a rotational barrier-lowering hydrogen bond in the starting materials. X-ray and NMR experiments revealed the presence of a barrier-raising ground state CHMIDLINE HORIZONTAL ELLIPSIS pi interaction in the product, supported by DFT calculations. A co-crystal of the quinidine-derived phase-transfer catalyst and substrate reveals key substrate-catalyst non-covalent interactions.

Automated summary

The dynamic kinetic resolution of C-N atropisomeric pyridones was achieved via asymmetric phase-transfer catalysis, utilizing a hydrogen bond and pi interaction. The study revealed key non-covalent interactions between the substrate and catalyst.