Production of 4,4-methenyl-bis-pyrazolones-(5)

4,41- Methenylbis-pyrazolones-5 are prepared by reacting 1 mol of a 5-pyrazolone with less than 1 mol of a dialkyl formamide, an alkyl-aryl-formamide or N-formyl-piperidine, and less than 1 mol of phosphorus oxychloride, thionyl chloride or phosgene. The pyrazolone may have a 1-phenyl substituent wh...

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Bibliographic Details
Main Authors BAUMANN HANS, LEUCHS DIETER
Format Patent
LanguageEnglish
Published 12.12.1962
Subjects
ADHESIVES
CHEMISTRY
DYES
HETEROCYCLIC COMPOUNDS
LAKES
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
MORDANTS
NATURAL RESINS
ORGANIC CHEMISTRY
ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES
PAINTS
POLISHES
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Summary:4,41- Methenylbis-pyrazolones-5 are prepared by reacting 1 mol of a 5-pyrazolone with less than 1 mol of a dialkyl formamide, an alkyl-aryl-formamide or N-formyl-piperidine, and less than 1 mol of phosphorus oxychloride, thionyl chloride or phosgene. The pyrazolone may have a 1-phenyl substituent which itself may be substituted with a methyl, methoxy, nitro, sulpho, sulphonamido or chloro group. The 3-position of the pyrazolone may have a methyl, n-propyl, isopropyl. n-hexyl, dodecyl, heptadecyl, benzyl, phenyl, carbomethoxy or carbethoxy substituent. U.S.A. Specification 2,840,443 is referred to.
Bibliography:Application Number: GB19610000477