ORGANIC SOLVENT NANOFILTRATION OF 7-DEHYDROCHOLESTEROL OR 25-HYDROXY-7-DEHYDROCHOLESTEROL OR THEIR OH PROTECTED FORMS

ORGANIC SOLVENT NANOFILTRATION OF 7-DEHYDROCHOLESTEROL OR 25-HYDROXY-7-DEHYDROCHOLESTEROL OR THEIR OH PROTECTED FORMS

The present invention relates to the purification of 7-dehydrocholesterol or 25-hydroxy-7-dehydrocholesterol or their OH-protected forms, respectively. It has been found that the process using organic solvent nanofiltration allows an efficient reduction of the amount of a new higher molecular compou...

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Bibliographische Detailangaben
Hauptverfasser: SCHUETZ, Jan, GOY, Roman, MARTY, Maurus, WAECHTER, Ralph, WITTE, Julia
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
STEROIDS
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Beschreibung
Zusammenfassung:The present invention relates to the purification of 7-dehydrocholesterol or 25-hydroxy-7-dehydrocholesterol or their OH-protected forms, respectively. It has been found that the process using organic solvent nanofiltration allows an efficient reduction of the amount of a new higher molecular compound which is formed in a 5 new synthesis process of of 7-dehydrocholesterol or 25-hydroxy-7-dehydrocholes- terol or their OH-protected forms in small amounts. Said new higher molecular compound can be used as colorant.