Oxidation process for preparing the intermediate 6alpha, 9alpha-difluoro-11beta, 17alpha-dihydroxy-16.alpha-methyl-androst-1, 4-dien-3-one-17beta-carboxylic acid
The present invention relates to a process for the preparation of a compound of formula (I) which comprises the following step: wherein step (a) comprises oxidation of a solution containing the compound of formula (II) wherein the solution is formed in a mixture of water and tetrahydrofuran.
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | The present invention relates to a process for the preparation of a compound of formula (I) which comprises the following step: wherein step (a) comprises oxidation of a solution containing the compound of formula (II) wherein the solution is formed in a mixture of water and tetrahydrofuran. |
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