Process for preparing high purity 3-.alpha.-7-.beta.-dihydroxych

Details Process for preparing high purity 3-.alpha.-7-.beta.-dihydroxych Process for preparing high purity 3-.alpha.-7-.beta.-dihydroxych

1991-09-06

1992-05-26

Cintins, Marianne

Organic compounds -- part of the class 532-570 series

Organic compounds

Cyclopentanohydrophenanthrene ring system containing

C07J 7500

Patent

active

051170175

ABSTRACT:
A process for preparing 3-.alpha.-7-.beta.-dihydroxycholanic acid from a crude product containing up to 15% by weight of 3-.alpha.-7-.alpha.-dihydroxycholanic acid and up to 1% by weight of 3.alpha.-hydroxycholanic acid, by esterifying with methanol, crystallizing from a mixture of solvents consisting of methanol, an aromatic solvent and water and recrystallizing from a mixture of methanol, aromatic solvent and water.

REFERENCES:
Foye, Principals of Medicinal Chemistry (Philadelphia, Lea and Febiger 1981) p. 503.

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