Chenodeoxycholic Acid → Ursodeoxycholic Acid

Beteiligte Stoffe

Reaktionsschritte

To a solution of potassium ter.butylate (3.77 g, 33.6 mmols) and 3alpha-hydroxy-7-keto-5beta-cholanic acid (2.5 g, 6.36 mmols) in ter.butyl-alcohol (50 ml), kept at the reflux under nitrogen and under stirring, sodium metal (1.75 g, 0.76 gram-atoms) is added. The reaction mixture is maintained under stirring and reflux for 2 hours and then worked up as disclosed in example 1; 2.5 g of the residue consisting of the CDCA (7%) and the UDCA (93) are thus obtained.

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