Abstract
A total synthesis of ent-sedridine is described. The development of a new method for the construction of the C-2 chiral center of the piperidine ring was achieved using a proline-catalyzed Mannich reaction. Reaction of 4-hydroxybutanal and p-anisidine to form an imine and subsequent addition of acetone gave the key chiral aliphatic precursor with high enantioselectivity.
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