PROCESS FOR PREPARING HIGH PURITY 3-ALPHA-7-BETA-DIHYDROXYCHOLANIC ACID

摘要

PROCESS FOR PREPARING HIGH PURITY 3-ALPHA-7-BETA-DIHYDROXYCHOLANIC ACID 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 esterifyin with methanol, crystallizing from an aromatic solvent and recrystallinzing from a mixture of methanol, aromatic solvent and water.