申请人:Kabushiki Kaisha Yakult Honsha
公开号:US04399282A1
公开(公告)日:1983-08-16
New camptothecin derivatives possessing either or both of high anti-tumor activity and slight toxicity, represented by the general formula: ##STR1## wherein X is H, CH.sub.2 OH, COOH, an alkyl group, an aralkyl group or the grouping CH.sub.2 OR.sup.1 or COOR.sup.2 wherein R.sup.1 is an alkyl group or an acyl group and R.sup.2 is a lower alkyl group, Y is H, OH or the grouping OR.sup.3 wherein R.sup.3 is a lower alkyl group or an acyl group, and Z is H or an acyl group, with the proviso that when X is CH.sub.2 OH, an alkyl group or an aralkyl group, both Y and Z are H, that when X is the grouping CH.sub.2 OR.sup.1 or COOR.sup.2, Y is H, that when Y is OH, both X and Z are H, and that when Y is the grouping OR.sup.3, X is H, and water-soluble alkali metal salts thereof. These camptothecin derivatives are prepared by treating camptothecin with sulfuric acid and a persulfate or with sulfuric acid and a peroxide, if necessary, with an organic compound corresponding to the organic moiety of the substituent to be introduced directly into camptothecin, in an aqueous medium in the presence or absence of a transition metal ion, and optionally treating the resultant products, if necessary, after oxidation of the introduced substituent, with an alkylating agent or an acylating agent.
新的喜树碱衍生物具有高抗肿瘤活性和轻微毒性中的一种或两种,通式表示为:##STR1## 其中X为H,CH.sub.2 OH,COOH,烷基,芳基烷基或CH.sub.2 OR.sup.1或COOR.sup.2的基团,其中R.sup.1为烷基或酰基,R.sup.2为较低的烷基,Y为H,OH或OR.sup.3的基团,其中R.sup.3为较低的烷基或酰基,Z为H或酰基,前提是当X为CH.sub.2 OH,烷基或芳基烷基时,Y和Z都为H,当X为CH.sub.2 OR.sup.1或COOR.sup.2时,Y为H,当Y为OH时,X和Z都为H,当Y为OR.sup.3时,X为H,以及其水溶性碱金属盐。这些喜树碱衍生物通过在水介质中在硫酸和过硫酸盐或硫酸和过氧化物的存在下,用与所要引入的取代基的有机部分相对应的有机化合物直接处理喜树碱而制备,有时在过氧化物的存在下,需要在过氧化物的存在下,在过氧化物的存在下,在过氧化物的存在下,在过氧化物的存在下,在过氧化物的存在下,在过氧化物的存在下,在过氧化物的存在下,在过氧化物的存在下,在过氧化物的存在下,在过氧化物的存在下,在过氧化物的存在下,在过氧化物的存在下,在过氧化物的存在下,在过氧化物的存在下,在过氧化物的存在下,在氧化所引入的取代基之后,必要时用烷基化剂或酰化剂处理所得产物。