Synthesis, in Vitro Pharmacology, and Molecular Modeling of Very Potent Tacrine−Huperzine A Hybrids as Acetylcholinesterase Inhibitors of Potential Interest for the Treatment of Alzheimer's Disease
作者:Pelayo Camps、Rachid El Achab、Diana Marina Görbig、Jordi Morral、Diego Muñoz-Torrero、Albert Badia、Josep Eladi Baños、Nuria María Vivas、Xavier Barril、Modesto Orozco、Francisco Javier Luque
DOI:10.1021/jm980620z
日期:1999.8.1
obtained for the 9-ethyl derivative rac-20, previously prepared by our group. More bulky substituents at position 9 led to less active compounds, although some of them [9-isopropyl (rac-22), 9-allyl (rac-23), and 9-phenyl (rac-26)] show activities similar to that of THA. Substitution at position 1 or 3 with methyl or fluorine atoms always led to more active compounds. Among them, the highest activity
已合成11种新的12-氨基-6,7,10,11-四氢-7,11-甲基环辛基[b]喹啉衍生物[他克林(THA)-石杉碱A杂种,rac-21-31]作为外消旋混合物并进行了测试作为乙酰胆碱酯酶(AChE)抑制剂。对于苯环上未取代的衍生物,我们小组先前制备的9-乙基衍生物rac-20的活性最高。第9位的更大取代基导致活性较低的化合物,尽管其中某些化合物[9-异丙基(rac-22),9-烯丙基(rac-23)和9-苯基(rac-26)]表现出相似的活性THA。在位置1或3处被甲基或氟原子取代通常会导致活性更高的化合物。其中,对3-氟-9-甲基衍生物rac-28观察到最高的活性[比THA高约15倍,比(-)-石杉碱A高约9倍]。一些THA-石杉碱甲杂化物(rac-19,rac-20,rac-28和rac-30)的活性,通过使用微晶纤维素三乙酸酯通过手性中压液相色谱(手性MPLC)将其分离为对映体作为