(E)-2-Chloro-3-(2-cyanovinyl)-9,10-dimethoxy-4-oxo-6,7-dihydro-4H-pyrido[2,1-a] isoquinoline- 1-carbonitrile (5) was obtained by treatment of the 2-chloro-3-formylpyrido[2,1-a]isoquinoline derivative 3 with 2-(triphenylphosphoranylidene)acetonitrile (4). Treatment of 5 with sodium azide afforded the corresponding azido compound 6 which could be reduced by sodium dithionite to compound 7. A novel isoquinolino[2,1-g][1,6]naphthyridine derivative 11 was obtained by the reaction of phenyl isothiocyanate with the phosphorane compound 8, which was prepared by the reaction of compound 6 with triphenylphosphine. Treatment of 5 with amines 12a-c and thiophenols 14a-c in refluxing ethanol afforded the corresponding substitution products 13a-c and 15a-c, respectively. Also, the reaction of 1 with a-oxo hydroxamoyl chlorides 16 was reinvestigated, and the synthesized pyrazoloisoquinolines 19a-f and pyridazinopyrazoloisoquinolines 20a, e were screened for their in vitro antitumor activities.
(E)-2-
氯-3-(2-
氰基
乙烯基)-9,10-二甲氧基-4-氧代-6,7-二氢-4H-
吡啶并[2,1-a]
异喹啉-1-甲腈 (5) 由 2-(
三苯基膦亚基)
乙腈 (4) 处理 2-
氯-3-甲酰基
吡啶并[2,1-a]
异喹啉衍
生物 3 而得。用
叠氮化
钠处理 5 后可得到相应的
叠氮化合物 6,该化合物可通过
亚硫酸钠还原成化合物 7。异
硫氰酸苯酯与
磷烷化合物 8 反应得到了新型
异喹啉并[2,1-g][1,6]
萘啶衍
生物 11,后者是由化合物 6 与
三苯基膦反应制备的。在回流
乙醇中将 5 与胺 12a-c 和
噻吩酚 14a-c 处理,可分别得到相应的取代产物 13a-c 和 15a-c。此外,还重新研究了 1 与 a-氧代羟基
氨基
甲酰氯 16 的反应,并对合成的
吡唑并异喹
醇类 19a-f 和
哒嗪并异喹
醇类 20a, e 进行了体外抗肿瘤活性筛选。