Process for preparing 2,2,6,6-tetramethyl-4-piperidone
AssigneeCiba-Geigy Corporation
InventorsGiuseppe Cantatore, Paolo Cassandrini
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Abstract
A process for preparing 2,2,6,6-tetramethyl-4-piperidone from ammonia and acetone, wherein acetone and ammonia are reacted in a single stage for a time of 2 to 8 hours in an acetone:ammonia molar ratio of 20:1 to 4:1, at a temperature of 50.degree. to 120.degree. C. and at a pressure of 1 to 50 atmospheres, in the presence of 0.001-0.1 moles of acid catalysts per mole of acetone used in the reaction.
Claims2
In a process for preparing 2,2,6,6-tetramethyl-4-piperidone from ammonia and acetone, in a single stage for a time of 2 to 8 hours, at a temperature of 50.degree. to 120.degree. C. and at a pressure of 1 to 50 atmospheres, in the presence of 0.001-0.1 moles of acid catalysts per mole of acetone, the improvement consisting in reacting the acetone and ammonia in a molar ratio of 20:1 to 4:1.
Dependencies are inferred from the claim text.