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US 5,508,453 AGranted
Intermediate for use in the preparation of taurocholanic acids
AssigneeSanofi
InventorsRoberto Arosio, Vittorio Rossetti
Life of this patent
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Abstract
The present invention relates to intermediates for use in the preparation of taurocholanic acids. The intermediates have the following formula (IV): ##STR1## in which A completes the 5.beta.-cyclopentaneperhydrophenanthrene structure of a cholanic acid; E is hydrogen or a methyl; and R is a hydrocarbon residue bonded to the carbonyl group by a tertiary carbon.
Claims6
An anhydride of formula (IV):
- ##STR10## in which A completes the 5.beta.-cyclopentaneperhydrophenanthrene structure of a cholanic acid, E is hydrogen or a methyl and R is a hydrocarbon residue bonded to the carbonyl group by a tertiary carbon.
The benzoic anhydride of 3.alpha.,7.beta.-dihydroxy-5.beta.-cholan-24-oic acid.
The trimethylacetic anhydride of 3.alpha.,7.beta.-dihydroxy-5.beta.-cholan-24-oic acid.
Dependencies are inferred from the claim text.