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. Author manuscript; available in PMC: 2020 Apr 8.
Published in final edited form as: Angew Chem Int Ed Engl. 2020 Jan 21;59(7):2844–2849. doi: 10.1002/anie.201912640

Figure 5.

Figure 5.

Catalytic cycle, which includes provisions for the formation of (2S,3S)-3a (black and blue), minor enantiomer (2R,3R)-3a (red), and diastereomer meso-3a (violet). Gibbs free energies for relevant ground state and transition state structures of the proposed catalytic cycle and 3D representations of key transition states along the reaction coordinate.[17] See the Supporting Information for more details.