Patent ID: 8513417

Claim:
A method for producing a 2,6-substituted-4-piperidone derivative represented by the following formula: wherein in the formula: R 1 and R 2 and R 3 and R 4 are independently crosslinked to each other to form a substituted or unsubstituted C 4 -C 40 monocyclic or polycyclic saturated ring, and the saturated ring may be interrupted by an oxygen atom, a nitrogen atom or a sulfur atom, wherein the method comprises the step of reacting a triacetoneamine derivative represented by formula (1): wherein in the formula: R is a hydrogen atom or a C 1 -C 6 alkyl group; and the R′ groups are each independently a C 1 -C 6 alkyl group, with a ketone or aldehyde derivative represented by formula (2): wherein in the formula: R 5 and R 6 are crosslinked to each other to form the substituted or unsubstituted C 4 -C 40 monocyclic or polycyclic saturated ring that may be interrupted by an oxygen atom, a nitrogen atom or a sulfur atom in the presence of ammonium salt.