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Chemistry · L5 · Asymmetric Catalysis Mechanisms
What a chiral ligand or a metal-free organocatalyst adds on top of the achiral organometallic mechanism skeleton: the quadrant/face-selectivity model for chiral hydrogenation (BINAP), the Sharpless Ti-tartrate asymmetric epoxidation mechanism, and proline-based organocatalysis via an enamine intermediate.