JPH0121759B

JPH0121759B

A process for preparing a 3 beta ,7 beta -dihydroxy- DELTA 5-steroid of the formula wherein Q is and R1 is hydrogen, trimethylacetyl, tert-butyldimethylsilyl, dimethyl-2-(3-methylbutyl)silyl or tribenzylsilyl, comprises fermenting a 3 beta -hydroxy- DELTA 5-steroid of the formula wherein Q is as def...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: KURAUSU NIKISHU, KAARU PETSUORUTO, RUDORUFU UIIHIERUTO, DEIITAA BITORAA, HENRII RAURENTO
Format: Patent
Sprache:eng
Schlagworte:
BEER
BIOCHEMISTRY
CHEMISTRY
ENZYMOLOGY
FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIREDCHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERSFROM A RACEMIC MIXTURE
METALLURGY
MICROBIOLOGY
MUTATION OR GENETIC ENGINEERING
ORGANIC CHEMISTRY
PROCESSES USING MICROORGANISMS
SPIRITS
STEROIDS
VINEGAR
WINE
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Beschreibung
Zusammenfassung:A process for preparing a 3 beta ,7 beta -dihydroxy- DELTA 5-steroid of the formula wherein Q is and R1 is hydrogen, trimethylacetyl, tert-butyldimethylsilyl, dimethyl-2-(3-methylbutyl)silyl or tribenzylsilyl, comprises fermenting a 3 beta -hydroxy- DELTA 5-steroid of the formula wherein Q is as defined above, and R2 is hydrogen or alkanoyl of 2-6 carbon atoms, with a culture of Botryodiplodia malorum to obtain the corresponding 3 beta ,7 beta -dihydroxy- DELTA 5-steroid; and, optionally, reacting the resultant product with trimethylacetic anhydride, tert-butyldimethylsilyl chloride, dimethyl-2-(3-methylbutyl)silyl chloride, or tribenzylsilyl chloride.