PROCESS FOR PRODUCING PYRIDINES SUBSTITUTED AROMATICALLY OR HETEROAROMATICALLY IN THE 3 POSITION

PROCESS FOR PRODUCING PYRIDINES SUBSTITUTED AROMATICALLY OR HETEROAROMATICALLY IN THE 3 POSITION

A process for the production of a pyridine which is aromatically or heteroaromatically substituted in the 3-position is disclosed wherein the process comprises reacting an aliphatic oxo compound which contains an unsaturated carbon bond adjacent to the oxo group with an aliphatic-aromatic or aliphat...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: BESCHKE, HELMUT, KLEEMANN, AXEL
Format: Patent
Sprache:eng ; fre
Schlagworte:
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
THEIR RELEVANT APPARATUS
TRANSPORTING
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Beschreibung
Zusammenfassung:A process for the production of a pyridine which is aromatically or heteroaromatically substituted in the 3-position is disclosed wherein the process comprises reacting an aliphatic oxo compound which contains an unsaturated carbon bond adjacent to the oxo group with an aliphatic-aromatic or aliphatic-heteroaro-matic aldehyde and with ammonia in the gas phase in the presence of n dehydrating and dehydrogenating catalyst at a temperature in the range of from 250 to 550.degree.C. The pyridines can be produced in high yields from readible available starting substances and are important intermediate products for the production of medicaments, plant protection agents and plastics.