Process for preparing 2,2,6,6-tetramethyl-4-piperidone

Details Process for preparing 2,2,6,6-tetramethyl-4-piperidone Process for preparing 2,2,6,6-tetramethyl-4-piperidone

1983-05-18

1985-08-20

Schwartz, Richard A.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D21174

Patent

active

045365814

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.

REFERENCES:
patent: 3513170 (1970-05-01), Murayama et al.
Sosnovsky, G., et al., Synthesis, 11, 735-6, (1976).
Sosnovsky, G., et al., Z. Naturfursch, B: Anorg. Chem., Org. Chem., 32B, 328-37 and 338-46, (1977).

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