Preparation of 2, 2, 6, 6-tetramethylpiperidin-4-one (TAA)

Details Preparation of 2, 2, 6, 6-tetramethylpiperidin-4-one (TAA) Preparation of 2, 2, 6, 6-tetramethylpiperidin-4-one (TAA)

1997-08-14

1999-01-05

Chang, Ceila

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D21174

Patent

active

058564942

ABSTRACT:
A process for preparing 2,2,6,6-tetramethylpiperidin-4-one (TAA) is described, wherein
a mixture comprising acetone and/or acetone condensates and ammonia in a molar ratio of from 20:1 to 3:1
at from 50.degree. to 130.degree. C.
is reacted in the presence of dimethyl sulfate, the amount of dimethyl sulfate being from 0.5 to 5 mol-%, based on acetone.

REFERENCES:
patent: 3959295 (1976-05-01), Orban et al.
patent: 4356308 (1982-10-01), Wiezer et al.
patent: 4536581 (1985-08-01), Cantatore et al.
patent: 4734502 (1988-03-01), Kruse
Kinishi et al. "2,2,6,6-tetramethyl-4-oxopiperidine" CA 107:58879, 1987.
Balogh et al. "2,2,6,6-tetramethyl-4-piperidinone" CA 107:178627, 1987.

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