FOERFARANDE FOER FRAMSTAELLNING AV 4-SUBSTITUERADE 1,2-DIFENYL-3,5-DIOXOPYRAZOLIDINER

FOERFARANDE FOER FRAMSTAELLNING AV 4-SUBSTITUERADE 1,2-DIFENYL-3,5-DIOXOPYRAZOLIDINER

Anti-inflammatory 4-substituted 1,2-diphenyl-3,5-dioxopyrazolidines of the formula I < IMAGE > are prepared by reacting compounds of the formula II < IMAGE > with a triarylphosphorane derivative of the formula III < IMAGE > An etherified hydroxyl group which may be present is then...

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Bibliographische Detailangaben
Hauptverfasser: DONETTI ARTURO, CEREDA ENZO
Format: Patent
Sprache:fin
Schlagworte:
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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Zusammenfassung:Anti-inflammatory 4-substituted 1,2-diphenyl-3,5-dioxopyrazolidines of the formula I < IMAGE > are prepared by reacting compounds of the formula II < IMAGE > with a triarylphosphorane derivative of the formula III < IMAGE > An etherified hydroxyl group which may be present is then removed by means of mild Lewis acids. The substituents in the formulae I, II and III have the meanings given in Patent Claim 1.