The catalytic enantioselective Mannich reaction promoted by chiral bifunctional organocatalysts is described. The treatment of beta-ketoesters with N-Boc-aldimines under mild reaction conditions afforded the corresponding beta-amino beta-ketoesters with excellent diastereoselectivities (up to 100:0 dr) and excellent enantioselectivities (up to 99% ee).
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Kang et al. (2009) studied this question.
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