FREMGANGSMAATE FOR FREMSTILLING AV 4-SUBSTITUERTE 1,2-DIFENYL-3,5-DIOKSOPYRAZOLIDINER

FREMGANGSMAATE FOR FREMSTILLING AV 4-SUBSTITUERTE 1,2-DIFENYL-3,5-DIOKSOPYRAZOLIDINER

FREMGANGSMÅTE FOR FREMSTILLING AV 4-SUBSTITUERTE 1,2-DIFENYL-3,5-DIOKSOPYRAZOLIDINER. 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...

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Bibliographische Detailangaben
Hauptverfasser: CEREDA, ENZO, DONETTI, ARTURO
Format: Patent
Sprache:nor
Schlagworte:
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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Zusammenfassung:FREMGANGSMÅTE FOR FREMSTILLING AV 4-SUBSTITUERTE 1,2-DIFENYL-3,5-DIOKSOPYRAZOLIDINER. 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.