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In control: The computational study of the title reaction catalyzed by the planar‐chiral 4‐(pyrrolidino)pyridine is reported (see scheme). The resting state is a chiral Brønsted acid complex and the rate‐determining step involves a chiral base. The catalyst controls the enantioselectivity through a combination of stereoelectronic effects and CH⋅⋅⋅O interactions.
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