Process for preparing ketocholanates
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United States of America Patent
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Apr 17, 1990
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N/A
app pub date -
Mar 14, 1988
filing date -
Mar 31, 1987
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Expired
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Abstract
A process for preparing ketocholanate(s) comprises oxidizing cholanic acid compound(s), such as alkyl 3.alpha.-alkoxycarbonyloxy-7.alpha.,12.alpha.-dihydroxycholanates or alkyl 3.alpha.-acyloxy-7.alpha.,12.alpha.-dihydroxycholanates, with an alkali metal salt of an oxo acid of halogen in the presence of a cerium compound. Ketocholanate(s) such as alkyl 3.alpha.-alkoxycarbonyloxy-7,12-dioxocholanataes, alkyl 3.alpha.-alkoxycarbonyloxy- 7-oxo-12.alpha.-hydroxycholanates, alkyl 3.alpha.-acyloxy-7,12-dioxocholanates, alkyl 3.alpha.-alkoxycarbonyloxy-12- oxocholantes, alkyl 3.alpha.-acyloxy-7-oxo-12.alpha.-hydroxycholanates and mixtures thereof are thus produced.
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