Process for the production of 16,17-[{cyclohexylmethylen)bis(oxy)]-11,21-dihydroxy-pregna-1,4-dien-3,20-dion or its 21-isobutyrat by transketalisation

The invention relates to a process for the preparation of 16,17-[(cyclohexylmethylene)bis(oxy)]-11,21-dihydroxypregna-1,4-diene-3,20-dione[11beta,16alpha(R)] and similar compounds, by reaction of an appropriate 16,17-ketal with cyclohexanealdehyde.

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Bibliographic Details
Main Author SCHMIDT BEATE
Format Patent
LanguageEnglish
Published 14.04.2005
Edition7
Subjects
APPARATUS THEREFOR
CHEMISTRY
GENERAL METHODS OF ORGANIC CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
STEROIDS
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Summary:The invention relates to a process for the preparation of 16,17-[(cyclohexylmethylene)bis(oxy)]-11,21-dihydroxypregna-1,4-diene-3,20-dione[11beta,16alpha(R)] and similar compounds, by reaction of an appropriate 16,17-ketal with cyclohexanealdehyde.
Bibliography:Application Number: US20030399689