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 CH⋯π 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.
File Contents:
1) Excel worksheet containing extracted energies
2) Associated Gaussian com and log files for geometry optimisation and single point energy (ecp2) calculations
Files have been split into separate folders for each R group.