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2.2. Chiral Imines and Imine Derivatives 2.2.1. Imines and Imine Derivatives from Chiral Carbonyl Compounds. Chiral α-oxysubstituted aldehydes were used by Kobayashi and co-workers in a three-component reaction with allylboropinacolate and ammonia in ethanol. The corresponding homoallylic primary amines were obtained with good to high syn diastereofacial selectivities (Scheme 5). 20 The precise reaction mechanism was unclear. Preformation of N-Scheme 3 Scheme 4 Scheme 5 Chemical Reviews Review dx.

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