A series of new N4-substituted
7-bromo-1,5-naphthyridin-4-amines has been prepared from nicotinic acid through 3-bromo-8-chloro- 1,5- naphthyridine by nucleophilic replacement of the
8-chloro substituent with appropriate amines. Several of these compounds, namely 7-bromo-N- (4′-diethylamino-1′-methylbutyl)-1,5-naphthy-ridin-4-amine (′5-azabromoquine'), 4-(7′-bromo-1′,5′-naphthyridin-4′-ylamino)-2-(diethylamino-methyl)phenol and 7-bromo-N-(2′-diethylaminoethyl)-1,5- naphthyridin-4-amine showed significant antimalarial acivity. Apparent cures were effected when these test chemicals were injected intra-peritoneally in a single dose of 200
mg/kg to mice infected with Plasmodium vinckei vinckei.
一系列新的 N4 取代
一系列新的 N4 取代型 7-溴-1,5-萘啶-4-胺是通过 3-溴-8-氯-1,5-萘啶与适当的胺亲核取代烟酸制备的。
8-氯取代基与适当的胺进行亲核置换,制备出了烟酸和 3-溴-8-氯-1,5-萘啶。这些化合物包括 7-溴-N-(4′-二乙氨基-1′-甲基丁基)-1,5-萘啶-4-胺(′5-氮溴喹啉)、4-(7′-溴-1′、5′-萘啶-4′-基氨基)-2-(二乙基氨基甲基)苯酚和 7-溴-N-(2′-二乙基氨基乙基)-1,5-萘啶-4-胺显示出显著的抗疟活性。当小鼠腹腔注射这些试验化学品单剂量 200
毫克/千克的剂量腹腔注射给感染了 vinckei vinckei 疟原虫的小鼠。