14-取代的1,3-二甲基-5,10-甲基环戊烯[4,5]吡咯并[2,3 - d ]嘧啶-2,4(1,3)的合成,性质和NAD + -NADH型氧化还原能力H)-二氟四氟硼酸酯及其氢化物加合物
摘要:
14-取代的1,3-二甲基-5,10-甲基环己酮[4,5]吡咯并[2,3 - d ]嘧啶-2,4(1,3 H)-二氟四氟硼酸酯11a,b +的合成· BF 4 -通过用MeI甲基化5,10-甲基环己酮[4,5]吡咯并[2,3- d ]嘧啶-2,4(1,3 H)-二酮衍生物并通过42处理阴离子交换反应来完成%HBF水溶液4。化合物11b +· BF 4 -交替地通过1,6-甲基[11]亚萘基四氟硼酸与6-苯基氨基-1,3-二甲基尿嘧啶的反应和随后的氧化环化反应合成。11a,b +的显着结构特征在检查UV-vis和NMR光谱数据以及X射线晶体分析时得到澄清。阳离子11a,b +的稳定性用分光光度法测定的p K R +值表示为9.8和9.7,分别比相应的七元环阳离子小1.4和1.2个pH单位。但是,该值比母体1,6-甲基[11]环烯基鎓离子的pH值大3.6和3.5个pH单位(p K R + = 6
Synthesis and Neurotropic Activity of New Pyrimido[4′,5′:4,5]Thieno[2,3-b]Quinoline Derivatives
作者:V. V. Dabaeva、M. R. Bagdasaryan、A. S. Noravyan、I. A. Dzhagatspanyan、I. M. Nazaryan、A. G. Akopyan
DOI:10.1007/s11094-015-1334-5
日期:2015.12
New methods for preparing pyrimido[4′,5′:4,5]thieno[2,3-b]quinoline derivatives based on 3-cyanohexahydro-2-quinoline were developed. The neurotropic activity of these compounds was studied.
Bazedoxifene is a selective estrogen receptor modulator (SERM) that has been developed for use in postmenopausal osteoporosis. However, it contains a potentially toxic 5-hydroxy-3-methylindole moiety. Previous studies on the 5-hydroxyindole and the 3-alkylindole-containing drugs indometacine, zafirlukast and MK-0524 structural analogs have shown that they are bioactivated by cytochrome P450s through a dehydrogenation process to form quinoneimine or 3-methyleneindolenine electrophilic species. In the present study, bazedoxifene was synthesized and then evaluated, together with raloxifene and 2-(4-hydroxyphenyl)-3-methyl-1H-indol-5-ol (13), a 3-methyl-5-hydroxyindole-based structural fragment of bazedoxifene, for its ability to form reactive electrophilic species when incubated with human liver microsomes (HLMs) or recombinant CYP isozymes. We showed that bazedoxifene was bioactivated only in trace amounts with recombinant CYP isozymes. In contrast, the N-dealkylated fragment of bazedoxifene (2-(4-hydroxyphenyl)-3-methyl-1H-indol-5-ol) was bioactivated in considerable amounts to an electrophilic intermediate, which was trapped with glutathione and identified by LC-MS/MS. This suggests that bazedoxifene would require initial N-dealkylation, which could subsequently lead to the formation of the reactive intermediate. However, such an N-dealkylated metabolite of bazedoxifene was not detected after the incubation of bazedoxifene in HLM or recombinant CYP isozymes. (C) 2012 Elsevier Ireland Ltd. All rights reserved.