Abstract Michael reactions of methyl (ethyl) 1-benzyl-4-oxopiperidine-3-carboxylates with a number of α, β-unsaturated carbonyl compounds result in formation of 6-and 6, 8-substituted methyl (ethyl) 3-benzyl-9-oxo-3-azabicyclo [3.3. 1] nonane-1-carboxylates. Stereochemical aspects of these reactions were studied, and some further transformations of the products were performed.
