Heteroatom directed photoannulation: synthesis of indoloquinoline alkaloids: cryptolepine, cryptotackieine, cryptosanguinolentine, and their methyl derivatives
作者:T. Dhanabal、R. Sangeetha、P.S. Mohan
DOI:10.1016/j.tet.2006.04.050
日期:2006.6
indoloquinoline alkaloids is described. The reaction of 2,3 and 4-substituted haloquinolines with anilines afforded the respective anilinoquinolines, which upon photocyclization gave the indoloquinolines. By regioselective methylation on quinoline nitrogen, furnished the alkaloids cryptotackieine, cryptosanguinolentine, cryptolepine, and the synthetic isomer isoneocryptolepine. Their methyl derivatives
描述了吲哚喹啉生物碱的三步合成。2,3和4-取代的卤代喹啉与苯胺的反应得到各自的苯胺喹啉,其在光环化后得到吲哚喹啉。通过在喹啉氮上的区域选择性甲基化,提供了生物碱隐tackieine,隐sanguinolentine,隐lepinepine和合成异构体isooneocryptolepine。还合成了它们的甲基衍生物,以寻找新的抗疟原虫药物和DNA嵌入剂。