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 position9 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
New series of Huprine (12-amino-6,7,10,11-tetrahydro-7,11-methanocycloocta[b]quinolines) derivatives have been synthesized and their inhibiting activities toward recombinant humanacetylcholinesterase (rh-AChE) are reported. We have synthesized two series of Huprine analogues; in the first one, the benzene ring of the quinoline moiety has been replaced by different heterocycles or electron-withdrawing
已经合成了新系列的Huprine(12-氨基-6,7,10,11-四氢-7,11-甲氨基环辛[ b ]喹啉)衍生物,并报道了它们对重组人乙酰胆碱酯酶(rh-AChE)的抑制活性。我们合成了两个系列的胡派林类似物;在第一个中,喹啉部分的苯环已被不同的杂环或吸电子或给电子的取代苯基取代。设计第二个是为了评估在位置12处修饰的影响,在位置12处已将不同的短连接子引入到Huprine X,Y骨架上。所有这些分子都是由乙基或甲基双环[3.3.1] non-6-en-3-one通过Friedländer反应(涉及选定的邻位)制备的。-氨基氰基芳族化合物。也已经报道了基于这些Huprines的两种异二聚体的合成。已获得比最活跃的Huprines X和Y具有中等活性至相同范围的活性,最有效的类似物的活性比亲本Huprines X和Y低约三倍。拓扑结构数据是从分子对接和活性变化推断得出的不同接头之间的连
Enantioselective synthesis of tacrine–huperzine A hybrids. Preparative chiral MPLC separation of their racemic mixtures and absolute configuration assignments by X-ray diffraction analysis
A new synthesis of racemic 7-substituted bicyclo[3.3.1]non-6-en-3-ones, rac-4, whose key-step involves the reaction of a vinyl triflate, rac-7, with an organometallic reagent, has been developed. This procedure has been applied to the enantioselective synthesis of (+)- and (-)-7-ethylbicyclo[3.3.1]non-6-en-3-one, (+)- and (-)-4b, from which both enantiomers of the cholinesterase inhibitor, tacrine-huperzine A hybrid, 9b, have been obtained. Rac-9b and its related compounds rac-9a and rac-10a were separated into their enantiomers on a preparative scale by medium pressure liquid chromatography (MPLC) using microcrystalline cellulose triacetate as the chiral stationary phase. X-ray diffraction analysis of (-)-10a as the o-iodobenzoic acid salt, allowed us to establish its absolute configuration and deduce those of other enantiopure tacrine-huperzine A hybrids. (C) 1998 Elsevier Science Ltd. All rights reserved.
Synthesis and evaluation of tacrine–Huperzine a hybrids as acetylcholinesterase inhibitors of potential interest for the treatment of alzheimer’s disease
作者:Albert Badia、Josep E. Baños、Pelayo Camps、Joan Contreras、Diana M. Görbig、Diego Muñoz-Torrero、Montserrat Simón、Nuria M. Vivas
DOI:10.1016/s0968-0896(98)00015-7
日期:1998.4
Seventeen polycyclic compounds related to tacrine and huperzine A have been prepared as racemic mixtures and tested as acetylcholinesterase (AChE) inhibitors. The conjunctive pharmacomodulation of huperzine A (carbobicyclic substructure) and tacrine (4-aminoquinoline substructure) led to compound 7jy, 2.5 times less active than tacrine as AChE inhibitor, but much more active than its (Z)-stereoisomer (7iy). Derivatives 7dy and 7ey, lacking the ethylidene substituent, showed to be more active than tacrine. Many other structural modifications of 7jy led to less active compounds. Compounds 7dy and 7ey also showed to be much more active than tacrine in reversing the partial neuromuscular blockade induced by d-tubocurarine. (C) 1998 Elsevier Science Ltd. All rights reserved.
Camps, Pelayo; Cusack, Bernadette; Mallender, William D., Molecular Pharmacology, 2000, vol. 57, # 2, p. 409 - 417
作者:Camps, Pelayo、Cusack, Bernadette、Mallender, William D.、El Achab, Rachid、Morral, Jordi、Munoz-Torrero, Diego、Rosenberry, Terrone L.