VERFAHREN ZUR HERSTELLUNG VON TICRYNAFEN DER POLYMORPHEN MODIFIKATION B

VERFAHREN ZUR HERSTELLUNG VON TICRYNAFEN DER POLYMORPHEN MODIFIKATION B

4-(2-Thenoyl)-2,3-dichlorophenoxyacetic acid of the polymorphic modification B, characterised by an infrared spectrum having strong absorption bands at 1725 and 1418 cm and a very weak absorption band at 1180 cm, and a melting point, determined by differential thermoanalysis, of 152 DEG C. This modi...

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Bibliographische Detailangaben
Hauptverfasser: BALDINUS,JOSEPH G.,US, ZAREMBO,JOHN E.,US
Format: Patent
Sprache: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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Zusammenfassung:4-(2-Thenoyl)-2,3-dichlorophenoxyacetic acid of the polymorphic modification B, characterised by an infrared spectrum having strong absorption bands at 1725 and 1418 cm and a very weak absorption band at 1180 cm, and a melting point, determined by differential thermoanalysis, of 152 DEG C. This modification B can be prepared by recrystallising the modification A either a) slowly or rapidly from non-polar solvents, or b) rapidly from hot chloroform or ethylene dichloride.