Target 10-cyclopropyl-7-fluoro-1-hydroxy-6-(4-methyl-1-piperazinyl)acridin-9(10H)-one (IVc) and 7-fluoro-1-hydroxy-6-(4-methyl-1-piperazinyl)-9H-xanthen-9-one (IVd) were obtained from corresponding difluoro derivatives IVa and IVb, respectively. These intermediates were synthesized via respective 3,4-dihydro-1,9(2H)-diones Va and Vb. Acridine derivative (10-cyclopropyl-6,7-difluoro-3,4-dihydro-1H-acridine-1,9(2H,10H)-dione, Va) was synthesized from 1-cyclopropyl-6,7-difluoroisatoic anhydride (XI) and xanthene derivative (6,7-difluoro-3,4-dihydro-1H-xanthen-1,9(2H)-dione, Vb) from cyclohexenone derivative VIb. Several unsuccessful attempts to prepare hydroxyacridone IVc and/or some useful intermediates of its synthesis are also described.
目标10-环丙基-7-氟-1-羟基-6-(4-甲基-1-哌嗪基)蒽啉-9(10H)-酮(IVc)和7-氟-1-羟基-6-(4-甲基-1-哌嗪基)-9H-黄酮-9-酮(IVd)分别从相应的二氟衍生物IVa和IVb获得。这些中间体通过各自的3,4-二氢-1,9(2H)-二酮Va和Vb合成。蒽啉衍生物(10-环丙基-6,7-二氟-3,4-二氢-1H-蒽啉-1,9(2H,10H)-二酮,Va)是从1-环丙基-6,7-二氟异间苯酐(XI)合成的,黄酮衍生物(6,7-二氟-3,4-二氢-1H-黄酮-1,9(2H)-二酮,Vb)是从环己酮衍生物VIb合成的。还描述了几次未成功尝试制备羟基蒽啉IVc和/或其合成中的一些有用中间体。