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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Bibliographic Details
Main Authors CEREDA, ENZO, DONETTI, ARTURO
Format Patent
LanguageNorwegian
Published 09.04.1985
Edition4
Subjects
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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Summary: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.
Bibliography:Application Number: NO19790001161