2,2,6,6-Tetra:methyl -4-oxo:piperidine prepn

2,2,6,6-Tetra:methyl -4-oxo:piperidine prepn

Prepn. of 2,2,6,6-tetramethyl -4-oxopiperidine (I) comprises reacting acetone with ammonia in the presence of a cationic exchange resin and 0.001-1% (on wt. of resin) of EDTA, Na2EDTA and/or dimethylglyoxime. Reaction is pref. at 40-55 deg.C. Typically, cation exchange resin, complexing agent and a...

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Hauptverfasser: GORBUNOV BORIS NIKOLAEVICH, PARAMONOV VLADIMIR IVANOVICH, BUKATIN VIKTOR MIKHAILOVICH, MEDVENDEV ALBERT IVANOVICH, VOEVOKDINA RIMMA SERGEEVNA, ROMANCHENKO TAMARA SIDOROVNA, POPOV LEONID KONSTANTINOVICH, LATYSHEV VASILY ALEXEEVICH
Format: Patent
Sprache:eng ; ita
Schlagworte:
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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Zusammenfassung:Prepn. of 2,2,6,6-tetramethyl -4-oxopiperidine (I) comprises reacting acetone with ammonia in the presence of a cationic exchange resin and 0.001-1% (on wt. of resin) of EDTA, Na2EDTA and/or dimethylglyoxime. Reaction is pref. at 40-55 deg.C. Typically, cation exchange resin, complexing agent and a soln. of NH3 in acetone are charged to a reactor, heated for 4-6 hr., cooled, and decanted. (I) is isolated by fractional distillation, boiling at 102-105 deg.C/18 mmHg.