共查询到18条相似文献,搜索用时 93 毫秒
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为了提高一枝蒿酮酸的生物活性,以一枝蒿酮酸和取代苄醇为原料.在偶联剂DCC/DMAP的作用下,合成了10种一枝蒿酮酸苄酯衍生物2a~2j,所合成的化合物均经过IR,1H NMR,ESI-MS等分析方法进行了表征,并对所合成的化合物2a~2j进行了初步的体外抗A,B型流感病毒和单纯Ⅰ,Ⅱ型疱疹病毒活性研究,结果表明:大部分化合物对A,B型流感病毒具有较强的抑制活性,其中化合物2e抑制A3,B型流感病毒的IC50值分别为5.5,5.5 gmol/L,化合物2i抑制A型流感病毒IC50值为:7.8 μmol/L,化合物2e和2i可作为抗流感病毒的先导化合物;大部分化合物在0.1μg/mL浓度下对Ⅰ,Ⅱ型疱疹病毒具有显著的抑制活性. 相似文献
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从新疆一枝蒿中分离得到了单体化合物一枝蒿酮酸, 然后以一枝蒿酮酸和有机胺为原料, 在偶联剂DCC, HOBt/DMAP的作用下, 合成了13种未见文献报道的一枝蒿酮酸酰胺衍生物2a~2m. 所合成的化合物经过IR, 1H NMR, ESI-MS等分析方法进行了表征, 并对化合物2a~2m进行初步的体外抗A3, B型流感病毒和单纯I, II型疱疹病毒活性研究. 初步试验结果表明化合物2a同时具有抗A3, B型流感病毒活性, 而且抗B型流感病毒活性比母体化合物的活性较高. 化合物2d的抗B型流感病毒活性比母体化合物高16倍, 化合物2e同时具有较强的抗单纯I, II型疱疹病毒活性. 相似文献
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从新疆一枝蒿巾分离得到了单体化合物一枝蒿酮酸,然后以一枝蒿酮酸和有机胺为原料,存偶联剂DCC,HOBt/DMAP的作用下,合成了13种未见文献报道的一枝蒿酮酸酰胺衍生物2a~2m.所合成的化合物经过IR,1HNMR,ESI-MS等分析方法进行了表征,并对化合物2a~2m进行初步的体外抗A3,B犁流感病毒和单纯Ⅰ,Ⅱ型疱疹病毒活性研究.初步试验结果表明化合物2a同时具有抗A3,B型流感病毒活性,而且抗B型流感病毒活性比母体化合物的活性较高.化合物2d的抗B犁流感病毒活性比母体化合物高16倍,化合物2e同时具有较强的抗单纯Ⅰ,Ⅱ型疱疹病毒活性. 相似文献
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为了提高一枝蒿酮酸的生物活性,以一枝蒿酮酸和3-取代苯基-5-氨甲基-异噁唑为原料,在偶合试剂DCC,HOBt/DMAP的作用下,合成了6个未见文献报道的含异噁唑的一枝蒿酮酸酰胺衍生物3a~3f.所合成的化合物均经过IR,1H NMR,13C NMR,ESI-MS等分析方法表征及初步体外抗A(H3N2,H1N1)型和B型流感病毒活性研究.初步实验结果表明:化合物3c同时具有抗A(H3N2)型和B型流感病毒活性,化合物3c和3e表现出比母体化合物强的抗B型流感病毒活性. 相似文献
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以(未)取代的间苯二酚与β-酮酸酯类化合物为起始原料,在酸的催化下发生Pechmann 反应,合成了4个关键中间体--7-羟基香豆素衍生物(1a~1d),其与芳氧乙(丙)酰氯作用,合成了8个结构新颖的7-芳氧乙酰氧基香豆素衍生物(2a~2h),其结构经1H NMR、13C NMR和元素分析表征。油菜平皿法和稗草小杯法的测试结果表明,目标化合物对双子叶植物油菜根长的抑制效果好,与阳性对照药2,4-D相当,并表现出一定的构效关系。进一步的温室盆栽实验(50 g/亩)表明,茎叶处理时,部分目标化合物(如2a~2e)对双子叶植物的抑制率为100%,与2,4-D的防效相当,具有作为先导化合物进一步优化的价值。
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以常春藤皂苷元为原料,对其3,23-羟基和28-羧基进行乙酰化、醚化、苯甲酰化及酯化等反应合成了8个常春藤皂苷元衍生物(2~9),其中6个未见文献报道,其结构经1H NMR, 13C NMR, IR和MS表征。采用MTT法测定了2~9的体外抗HBV活性。结果表明:3~9随浓度增大,对细胞活力的抑制率明显增加,特别是7和9抑制率最明显,用药浓度为1×10-6mol·L-1时,抑制率均为9.46±0.47%。对2~9抑制Hep G2.2.15细胞表达表面抗原(HBs Ag)进行了测试。结果表明:2~9对HBs Ag的分泌表达有一定的抑制作用。 相似文献
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Anita Toscani Rossana Denaro Sergio Fernando Castillo Pacheco Matteo Biolatti Silvia Anselmi Valentina DellOste Daniele Castagnolo 《Molecules (Basel, Switzerland)》2021,26(16)
Current therapy against herpes simplex viruses (HSV) relies on the use of a few nucleoside antivirals such as acyclovir, famciclovir and valacyclovir. However, the current drugs are ineffective against latent and drug-resistant HSV infections. A series of amidinourea compounds, designed as analogues of the antiviral drug moroxydine, has been synthesized and evaluated as potential non-nucleoside anti-HSV agents. Three compounds showed micromolar activity against HSV-1 and low cytotoxicity, turning to be promising candidates for future optimization. Preliminary mode of action studies revealed that the new compounds act in an early stage of the HSV replication cycle, just after the viral attachment and the entry phase of the infection. 相似文献
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Derivatives of rupestonic acid (5a–e) were synthesized and evaluated preliminarily at the National Center for Drug Screening (PRC) for antiviral activity against
type A3 and B flu virus and HSV-I and HSV-II in order to improve the biological activity of rupestonic acid. It was found that compound
5b was more active than rupestonic acid against type A3 flu virus.
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Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 247–249, May–June, 2008. 相似文献
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Raina M. Borum Avery E. Lin Xiangyi Dong Mingxuan Kai Yi Chen 《Molecules (Basel, Switzerland)》2022,27(21)
DNA nanostructures are well-established vectors for packaging diversified payloads for targeted cellular delivery. Here, DNA origami rectangular sheets were combined with Herpes Simplex Virus 1 (HSV1) capsids to demonstrate surface coverage of the particle via electrostatic interactions. The optimized origami:HSV1 molar ratios led to characteristic packaging geometries ranging from dispersed “HSV1 pockets” to agglomerated “HSV1 sleeves”. “Pockets” were disguised from cells in HeLa and B16F10 cells and were 44.2% less infective than naked HSV1 particles. However, the pockets were 117% more infective than naked HSV1 particles when the origami sheets were coated with folic acid. We observed infectivity from naked origami, but they are 99.1% less infective with respect to HSV1 and 99.6% less infective with respect to the pocket complexes. This work suggests that DNA origami can selectively modulate virus infectivity. 相似文献
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Daniel V. Schiavone Diana M. Kapkayeva Qilan Li Molly E. Woodson Andreu Gazquez Casals Prof. Lynda A. Morrison Prof. John E. Tavis Prof. Ryan P. Murelli 《Chemistry (Weinheim an der Bergstrasse, Germany)》2022,28(10):e202104112
Polyoxygenated tropolones possess a broad range of biological activity, and as a result are promising lead structures or fragments for drug development. However, structure–function studies and subsequent optimization have been challenging, in part due to the limited number of readily available tropolones and the obstacles to their synthesis. Oxidopyrylium [5+2] cycloaddition can effectively generate a diverse array of seven-membered ring carbocycles, and as a result can provide a highly general strategy for tropolone synthesis. Here, we describe the use of 3-hydroxy-4-pyrone-based oxidopyrylium cycloaddition chemistry in the synthesis of functionalized 3,7-dimethoxytropolones, 3,7-dihydroxytropolones, and isomeric 3-hydroxy-7-methoxytropolones through complementary benzyl alcohol-incorporating procedures. The antiviral activity of these molecules against herpes simplex virus-1 and hepatitis B virus is also described, highlighting the value of this approach and providing new structure–function insights relevant to their antiviral activity. 相似文献
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