IMPROVED PROCESS FOR PRODUCING 3,4,5-TRIMETHOXY-BENZALDEHYDE OF HIGH PURITY

IMPROVED PROCESS FOR PRODUCING 3,4,5-TRIMETHOXY-BENZALDEHYDE OF HIGH PURITY

Improved prepn. of high purity 3,4,5-methoxy-benzaldehyde from an acetal, formed by 5-bromo-vanillin or 3,5-di:bromo-4-hydroxy y-benzaldehyde-orthoformate and alcohols or glycols, with an alkaline-metal-methylate. The obtd. - syringaldehyde or its alkaline-metal-salt is methylated by di:methysulphat...

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Bibliographische Detailangaben
Hauptverfasser: JAKFALVI,ELEMER,HU, KOERTVELYESSY,GYULA,HU, DIETZ,ANDRAS,HU, MOLNAR,RUDOLF,HU, TELEKI,JOZSEF,HU, NYIRI,FERENC,HU, BECK,IVAN,HU
Format: Patent
Sprache:eng
Schlagworte:
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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Zusammenfassung:Improved prepn. of high purity 3,4,5-methoxy-benzaldehyde from an acetal, formed by 5-bromo-vanillin or 3,5-di:bromo-4-hydroxy y-benzaldehyde-orthoformate and alcohols or glycols, with an alkaline-metal-methylate. The obtd. - syringaldehyde or its alkaline-metal-salt is methylated by di:methysulphate or methylchloride. A 3,4,5-tri:methoxy-benzaldehyde deriv. or its alkalinee metal salt is obtd. and subjected to decompsn. in aq. acid.