PROCESS FOR THE PREPARATION OF POLYCYCLIC COMPOUNDS

PROCESS FOR THE PREPARATION OF POLYCYCLIC COMPOUNDS

A process for the preparation of compounds of the formula and salts thereof, in which R1 denotes hydrogen or trialkylacetyl, R2 denotes hydrogen or acetyl and R3 denotes alkyl, by cyclisation of a compound of the formula in which R1 is trialkylacetyl, and, if desired, conversion of a compound of the...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: KUMP, WILHELM
Format: Patent
Sprache:eng ; ger
Schlagworte:
CHEMISTRY
HETEROCYCLIC COMPOUNDS
HUMAN NECESSITIES
HYGIENE
MEDICAL OR VETERINARY SCIENCE
METALLURGY
ORGANIC CHEMISTRY
PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS ORMEDICINAL PREPARATIONS
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Beschreibung
Zusammenfassung:A process for the preparation of compounds of the formula and salts thereof, in which R1 denotes hydrogen or trialkylacetyl, R2 denotes hydrogen or acetyl and R3 denotes alkyl, by cyclisation of a compound of the formula in which R1 is trialkylacetyl, and, if desired, conversion of a compound of the formula I or a salt thereof obtainable by the process or in a different manner into another compound of the formula I or a salt thereof, conversion of a free compound of the formula I obtainable according to the process into a salt and/or conversion of a salt obtainable according to the process into the free compound of the formula I or into another salt.