4-Hydroxyphenyl acetic acid

4-Hydroxyphenyl acetic acid

A process for the preparation of 4-hydroxyphenyl acetic acid of the formula I, an important raw material for the preparation of pharmaceutically active substances, from sodium-4-hydroxymandalate monohydrate comprising reducing the sodium-4-hydroxymandalate monohydrate with a reducing agent consistin...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: MAHAJAN, SATISH WASUDEO, MANDAL, ARUN KANTI, JAWALKAR, DAMODAR GABAJI
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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Beschreibung
Zusammenfassung:A process for the preparation of 4-hydroxyphenyl acetic acid of the formula I, an important raw material for the preparation of pharmaceutically active substances, from sodium-4-hydroxymandalate monohydrate comprising reducing the sodium-4-hydroxymandalate monohydrate with a reducing agent consisting of stoichiometric quantity of a phosphorus (III) compound and catalytic or stoichiometric quantity of sulphur dioxide or equivalent salt thereof in a solvent at 60-120 DEG C and at ambient to 5 atmospheres pressures.