Process for the preparation of 1-(2-hydroxyethyl)-2,2,6,6-tetram

Details Process for the preparation of 1-(2-hydroxyethyl)-2,2,6,6-tetram Process for the preparation of 1-(2-hydroxyethyl)-2,2,6,6-tetram

1986-12-03

1988-03-15

Brust, Joseph Paul

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

546242, C07D21146

Patent

active

047314486

ABSTRACT:
There is disclosed a process for the preparation of 1-(2-hydroxyethyl-2,2,6,6-tetramethyl-4-piperidinol from triacetoneamine, which comprises first reducing triacetoneamine in water and/or a polar organic solvent by catalytic hydrogenation to 2,2,6,6-tetramethyl-4-piperidinol, and adding a catalytic amount of acid to the resultant solution, without isolation of the intermediate, after optional concentration of the solution by distillation, and subsequently reacting the 2,2,6,6-tetramethyl-4-piperidinol with ethylene oxide.
1-(2-Hydroxyethyl)-2,2,6,6-tetramethyl-4-piperidinol is a useful light and heat stabilizer for plastics and is, in addition, a valuable intermediate for the synthesis of further light stabilizer additives.

REFERENCES:
patent: 3974127 (1976-08-01), Tanikella et al.
patent: 4001190 (1977-01-01), Tanikella et al.
patent: 4014887 (1977-03-01), Randell et al.
patent: 4223138 (1980-09-01), Schubart
patent: 4263202 (1981-04-01), Rasberger et al.
patent: 4496732 (1985-01-01), Lee et al.

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