METHOD FOR PRODUCING TERPYRIDINE

METHOD FOR PRODUCING TERPYRIDINE

PROBLEM TO BE SOLVED: To provide a method for producing terpyridine from 2-cyanopyridine on an industrial scale. SOLUTION: Terpyridine is produced by a method containing a successive reaction process comprising (A) the condensation of a (1-4C alkyl)pyridine-2- carboxylate derivative and acetone in a...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: PABST GUNTHER, LUNKWITZ RALPH, SCHERR GUENTER DR
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To provide a method for producing terpyridine from 2-cyanopyridine on an industrial scale. SOLUTION: Terpyridine is produced by a method containing a successive reaction process comprising (A) the condensation of a (1-4C alkyl)pyridine-2- carboxylate derivative and acetone in an aprotic solvent in the presence of a base, (B) the reaction of the obtained 1,5-bis(2-pyridyl)pentane-1,3,5-trione derivative with ammonia or an ammonium salt of the formula: (NH4 )q Y while removing produced water from the system and (C) the chlorination of the obtained 2,6-bis(2-pyridyl)-4(1H)pyridinone derivative.