New 5- and/or 7-substituted camptothecin-1-oxide derivatives possessing anti-tumor activity with slight toxicity are represented by the general formula:
wherein R is a hydrogen atom, an alkyl group, a hydroxyl group, an alkoxy group or an acyloxy group, and R' is a hydrogen atom, an alkyl group, an aralkyl group, a hydroxymethyl group, an acloxymethyl group or a carboxymethyl group, with the proviso that R and R' are not both hydrogen atoms. These 5- and/or 7-substituted camptothecin-1-oxide derivatives may be prepared by treating the corresponding 5- and/or 7-substituted camptothecins with a peroxidant as an N-oxidizing reagent.
具有抗肿瘤活性和轻微毒性的 5-和/或 7-取代
喜树碱-1-氧化物新衍
生物由通式表示: 其中 R 是氢原子、烷基、羟基、烷氧基或酰氧基,R'是氢原子、烷基、芳基、羟甲基、酰氧基或羧甲基,但 R 和 R'不能都是氢原子。 这些 5-和/或 7-取代
喜树碱-1-氧化物衍
生物可以通过用一种过氧化剂作为 N-氧化试剂处理相应的 5-和/或 7-取代
喜树碱来制备。