8-Methoxy-2, 3, 4-trimethyl-1H-pyrrolo [3, 2-c] quinoline-6, 9-dione (28) and 2-methoxy-6-methyl-7, 8, 9, 10-tetrahydro-11H-indolo [3, 2-c] quinoline-1, 4-dione (31) can be obtained from 4-hydrazino-6-methoxy-2-methyl-5-quinolinamine (21). The synthetic method consists in creating the pyrrole or indole nucleus by applying Fischer's indole synthesis to the hydrazones (22 and 24) to give the amines (23 and 25, respectively). The catalytic dehydrogenation of 25 leads to the quinolinamine (26). The oxidation of the amines (23, 25 and 26) by Fremy's reagent (potassium nitrosodisulfonate) gives the quinones (28, 31 and 35). The nucleophilic substitution of the methoxy group by aziridine leads to 29, 33 and 36, which have moderate cytotoxic activity on L 1210 cells.
8-美氧基-2, 3, 4-三甲基-1H-
吡咯[3, 2-c]
喹啉-6, 9-二酮(28)和2-美氧基-6-甲基-7, 8, 9, 10-四氢-11H-
吲哚[3, 2-c]
喹啉-1, 4-二酮(31)可以由4-
肼基-6-美氧基-2-甲基-5-
喹啉胺(21)获得。合成方法包括通过将费希尔的
吲哚合成应用于
肼基化合物(22和24)以形成
吡咯或
吲哚核,从而得到胺(23和25)。对25进行催化脱氢反应可以得到
喹啉胺(26)。胺(23、25和26)与弗雷米试剂(亚硝基二
磺酸钾)的氧化反应生成醌(28、31和35)。亚乙基环胺对美氧基的亲核取代反应则生成29、33和36,这些化合物对L 1210细胞具有适度的细胞毒性活性。