| 摘要 |
<p>A process for preparing 9-hydroxyellipticine, or salt thereof, which comprises treating acetal compound (I): wherein R1 is alkyl or aryl, R2 is lower alkyl or aryl, R?3 and R4¿ are the same or different and each are substituted or unsubstituted lower alkyl, or both may combine each other at their termini to form substituted or unsubstituted lower alkylene, or a corresponding aldehyde thereof, with an acid, to give 9-hydroxyellipticine in a single step, and if necessary, converting the resulting 9-hydroxyellipticine into a salt thereof. These compounds are useful as an antitumor agent or an intermediate for preparing other medicaments.</p> |
