Process for the preparation of trans 4-amino-cyclohexyl acetic acid ethyl ester hcl

The invention relates to a process for the preparation of trans 4-amino-cyclohexil ethyl acetate HCl wherein d) hydrogenating 4-nitrophenyl acetic acid in a protic solvent at a temperature between 40-50° C. in the presence of Pd/C under 0.1-0.6 bar overpressure, and e) further hydrogenating the 4-am...

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Bibliographic Details
Main Authors HEGEDUS LASZL, JUHASZ BALINT, MATHE TIBOR BENCE, MARKOS DENES, CZIBULA LASZL, NAGYNE BAGDY JUDIT
Format Patent
LanguageEnglish
Published 01.04.2015
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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Summary:The invention relates to a process for the preparation of trans 4-amino-cyclohexil ethyl acetate HCl wherein d) hydrogenating 4-nitrophenyl acetic acid in a protic solvent at a temperature between 40-50° C. in the presence of Pd/C under 0.1-0.6 bar overpressure, and e) further hydrogenating the 4-aminophenyl acetic acid obtained in situ in step a) at a temperature between 50-60° C. under 1-4 bar overpressures, then f) heating to reflux the 4-aminocyclohexil acetic acid obtained in step b) for 1-3 hours in hydrochloric ethanol, and if desired after removing the solvent acetonitrile was added to the residue obtained and distilled off.
Bibliography:Application Number: CN200980146417