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Chemistry · L5 · Asymmetric Catalysis Mechanisms: The Quadrant Model, Sharpless Epoxidation, and Organocatalysis
What a chiral ligand or a metal-free chiral organocatalyst adds on top of the achiral organometallic mechanism skeleton (Wilkinson's-type cycle): the quadrant/face-selectivity model, the Sharpless Ti-tartrate epoxidation mechanism, and proline-based organocatalysis via an enamine intermediate.