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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
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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