Process for preparing 2,2,6,6-tetraalkyl-4-oxopiperidines

Details Process for preparing 2,2,6,6-tetraalkyl-4-oxopiperidines Process for preparing 2,2,6,6-tetraalkyl-4-oxopiperidines

1979-11-05

1981-06-23

Schwartz, Richard A.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D21174

Patent

active

042752116

ABSTRACT:
A process for producing piperidines of the formula (I) ##STR1## in which R.sub.1 is hydrogen or C.sub.1 -C.sub.4 -alkyl, from a ketone of the formula (II) R.sub.1 --CH.sub.2 --C(O)--CH.sub.3, wherein R.sub.1 has the meaning given above, and ammonia, in which process there is used as catalyst a strongly acid ion exchanger having a medium or large mesh size or having large macropores.

REFERENCES:
patent: 3513170 (1970-05-01), Murayama et al.
patent: 3904625 (1975-09-01), Alink
patent: 3953459 (1976-04-01), Orban et al.
patent: 3959295 (1976-05-01), Orban et al.
patent: 3963730 (1976-06-01), Murayama et al.
Astle, M. In Ion Exchangers in Organic and Biochemistry, Calmon et al., (Editors), Interscience, NY, 1957, pp. 662-665.

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