Process for the preparation of 4-hydroxy-2,2,6,6-tetramethylpipe

Details Process for the preparation of 4-hydroxy-2,2,6,6-tetramethylpipe Process for the preparation of 4-hydroxy-2,2,6,6-tetramethylpipe

1993-11-18

1995-02-21

Ivy, C. Warren

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

546243, C07D21136

Patent

active

053917502

ABSTRACT:
The present invention relates to a process for the preparation of 4-hydroxy-2,2,6,6-tetramethylpiperidine by heterogeneous catalytic hydrogenation of 4-oxo-2,2,6,6-tetramethylpiperidine in a melt or solution at temperatures of 60.degree. C. to 200.degree. C. and hydrogen pressures of 10 to 300 bar, in the presence of a catalyst comprising

REFERENCES:
patent: 4001250 (1977-01-01), Lantzsch et al.
patent: 4339585 (1982-07-01), Matsumura et al.
patent: 4910304 (1990-03-01), Fischer et al.

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