摘要 |
A process for the preparation of the compounds of general formula (I) in which R1 is H or OH; R2 is H, alpha -OH, or beta -OH; and R3 is a straight or branched C1-C4 alkyl group or a benzyl group, comprising the reduction of compounds of formula (III) wherein R1, R2 and R3 have the same meanings as in formula (I), in the presence of sodium borohydride.
|
申请人 |
BRACCO INTERNATIONAL B.V.;BROCCHETTA, MARINO;GALLOTTI, CHIARA;VISIGALLI, MASSIMO;ANELLI, PIER, LUCIO |
发明人 |
BROCCHETTA, MARINO;GALLOTTI, CHIARA;VISIGALLI, MASSIMO;ANELLI, PIER, LUCIO |