| 摘要 |
<p>A process for the preparation of a compound of formula (I), wherein R1 is optionally protected hydroxy or methoxy and R2 is hydrogen or 4'-(α-L-oleandrosyl)-αL-oleandrosyloxy, comprises the oxidation of a compound of formula (II), wherein R4 is hydrogen, or C¿1-6? alkyl, such as methyl, optionally substituted by one or more of hydroxy, alkoxy, alkylthio, oxo, halogen and trifluoromethyl.</p> |
