Solvent-free process for preparing 4-amino-2,2,6,6-tetramethylpi

Details Solvent-free process for preparing 4-amino-2,2,6,6-tetramethylpi Solvent-free process for preparing 4-amino-2,2,6,6-tetramethylpi

1995-12-04

1997-12-02

Fan, Jane

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D21156

Patent

active

056938179

ABSTRACT:
A process for preparing 4-amino 2,2,6,6-tetramethylpiperidine (TAD) from 2,2,6,6-tetramethylpiperidone (TAA), ammonia and hydrogen using a cobalt or nickel catalyst on a support which allows the omission of any added solvent, and provides substantially simplified work-up and increased space-time yields by significantly reducing the amounts of excess ammonia and catalyst needed to accomplish the reaction.

REFERENCES:
patent: 5395972 (1995-03-01), Furutani et al.
CA 122:160152, Furutani et al., 1995.
CA 109:6422, Popava et al., 1988.
CA 107: 39635, Takahashi et al., 1987.

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