1-p-chlorobenzoyl-2-methyl-5-methoxy or dimethylamino-3

1-p-chlorobenzoyl-2-methyl-5-methoxy or dimethylamino-3

(A) Process: R = methoxy or dimethylamino (B) Starting materials (II) The dehydrogenation is most suitably carried out using a catalyst such as palladium on carbon, sulphur, selenium, chloranil or dichloro-dicyanobenzoquinone. Palladium on carbon is preferred. The conversion takes place in a liquid...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: SLETZINGER,MEYER, MARTIN ERDA,JOHN
Format: Patent
Sprache:eng ; ger
Schlagworte:
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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Beschreibung
Zusammenfassung:(A) Process: R = methoxy or dimethylamino (B) Starting materials (II) The dehydrogenation is most suitably carried out using a catalyst such as palladium on carbon, sulphur, selenium, chloranil or dichloro-dicyanobenzoquinone. Palladium on carbon is preferred. The conversion takes place in a liquid medium which is a solvent for the starting material such as mesitylene, cyclohexane and dihydronaphthalene. Preferred temps. are usually the reflux temp. of the solvent. Filtration and the usual purification gives (I).