共查询到20条相似文献,搜索用时 15 毫秒
1.
H Saito S Kobayashi Y Uosaki A Sato K Fujimoto K Miyoshi T Ashizawa M Morimoto T Hirata 《Chemical & pharmaceutical bulletin》1990,38(5):1278-1285
Cyanation of quinocarcin readily opened the oxazolidine ring to provide DX-52-1 (2), which was a key compound in the synthesis of quinocarcin derivatives. Various electrophilic reactions toward aromatic ring of DX-52-1 were examined, and 10-substituted (e.g., halogen, nitro, formyl, cyano, hydroxy, etc.) analogs were prepared. Dehydrocyanation of the derivatives could be achieved to reproduce the oxazolidine ring upon treatment with HCl or AgNO3. 10-Chloride 10 and 10-bromide 11 were the most promising among the derivatives prepared. Antitumor activity of 10 was extended to B-16 melanoma. 相似文献
2.
白藜芦醇是一种具有广泛生物活性的茋类化合物。为了寻找活性较强的新型分子,以白藜芦醇为原料出发,经Vilsmeier甲酰化和Knoevenagel缩合,合成了3个未见文献报道的香豆素类白藜芦醇衍生物 (E)-7-羟基-5-(4-羟基苯乙烯基)香豆素(3a-3c),其结构经1H NMR、13C NMR和HRMS确证。抗炎和抗氧化活性结果发现,化合物3a具有与地塞米松相当的抗炎活性,并对超氧阴离子和羟基自由基有较强的清除作用,可做进一步研究。 相似文献
3.
Chao-Yue Chen Jian-Guo Sun Fei-Yan Liu Kwok-Pui Fung Ping Wu Zhi-Zhen Huang 《Tetrahedron》2012,68(12):2598-2606
A novel route for the efficient synthesis of a target psoralen moiety, 4,4′-dimethylxanthotoxol, has been developed, which need only four steps using cheap pyrogallol as a starting material. Subsequently, a range of new glycosylated psoralen derivatives were synthesized in good yields with simple procedures and mild reaction conditions. The experiment of biological activity shows that some of the glycosylated psoralen derivatives have antiproliferative activities against human cancer cell lines. A strong photo-induced antiproliferative effects were found under UVA. All of the glycosylated psoralen derivatives exhibited antioxidant activities against the oxidation of DNA induced by Cu2+/glutathione (GSH). Further experiment also demonstrates that the introduction of sugar moieties in some glycosylated psoralen derivatives can improve their antioxidant activities significantly. 相似文献
4.
Marc Lamblin Antoine Sallustrau Claude Commandeur Thierry Cresteil François-Xavier Felpin Jean Dessolin 《Tetrahedron》2012,68(24):4655-4663
In continuance of our search for newer anti-cancer agents we were interested on embelin, a XIAP (X-linked inhibitor of apoptosis protein) inhibitor. This natural benzoquinone bear a lipophilic chain and we report here the synthesis of hydrophilic analogues of embelin. To allow a large flexibility in the nature of the hydrophilic group, three amines with different length of carbon chain bearing a protected benzoquinone were prepared. The cytotoxic effects of these derivatives were evaluated on KB cell line. 相似文献
5.
Shuai Mu Xiao-Shuai Xie Duan Niu Da-Shuai Zhang Deng-Ke Liu Chang-Xiao Liu 《中国化学快报》2013,24(6):531-534
Series of novel derivatives of desloratadine designed as arginine vasopressin receptor antagonists were synthesized and structurally characterized by melting points,~1H NMR and HRMS.Their in vivo diuretic activities were evaluated on rats,and several target compounds showed promising diuretic results, especially compounds 8,18,27 and 31.Further in vitro bonding assay and cAMP assay showed that these compounds had a higher affinity to vasopressin V2 receptor than VI a receptor.Our studies indicated that desloratadine may be an active substructure for novel arginine vasopressin receptor antagonist development. 相似文献
6.
UV irradiation induced formation of reactive oxygen radical species and matrix metalloproteinases (MMPs) are thought to be involved in photo-damage to the skin. MMP-1 is the major collagenolytic enzyme responsible for collagen destruction in skin tissue. To develop new anti-photoaging agents, a series of 2,2'-dithiocinnamate derivatives and 2,2'-dithio or 2-thiobenzoate derivatives were designed and synthesized. The biological activities of the synthesized compounds were assayed for ABTS [2,2'-azinobis-(3-ethyl-benzo-thiazoline-6-sulfonic acid)] radical scavenging activity, MMP-1 inhibitory activity, and cytotoxicity to human dermal fibroblast cells. Compounds with potential of resistance to UV irradiation were identified. These compounds are expected to be useful for preventing photo-damage to the skin. 相似文献
7.
Stereospecific syntheses of the Z-E and E-Z vinylogues of combretastatin A-4, and two B-ring related analogues, were achieved through a Suzuki-Miyaura coupling. As compared to CA4, the derivative with a phenyl moiety has shown increased potency in its ability to inhibit tubulin polymerisation. 相似文献
8.
9.
10.
Woul Seong Park Mi Sik Shin Seung Kyu Kang Sang Dal Rhee Banda Narsaiah Hyae Gyeong Cheon Sung Soo Kim 《Journal of fluorine chemistry》2009,130(11):1001-1735
A series of triazepane derivatives such as (R)-3-amino-1-(1,2,5-triazepan-1-yl)-4-(2,4,5-trifluorophenyl)butan-1-ones (7, 13a-p) and (R)-3-amino-1-(1,2,5-triazepan-5-yl)-4-(2,4,5-trifluorophenyl)butan-1-ones (17a-e) was synthesized and evaluated for their ability to inhibit dipeptidyl peptidase IV (DPP-IV) enzyme. Compounds with the acid moiety were found to be potent inhibitors of DPP-IV without inhibiting CYP 3A4. Among them, compound 13p ((R)-4-[1-acetyl-2-{3-amino-4-(2,4,5-trifluorophenyl)butanoyl-1,2,5-triazepan-5-carbonyl}benzoic acid]) showed a good in vitro activity without inhibiting CYP. 相似文献
11.
Zhiyong Weng Wei Wei Xiaowu Dong Yongzhou Hu Shufang Huang Tao Liu Xin Xie 《Monatshefte für Chemie / Chemical Monthly》2012,17(8):303-308
Abstract
A series of novel piperidin-4-ol derivatives were designed, synthesized, and evaluated for potential treatment of HIV. The compounds were obtained via an efficient synthetic route in excellent yields and have been characterized by 1H NMR, 13C NMR, MS, and elemental analysis. The CCR5 antagonistic activities of the compounds have also been evaluated. 相似文献12.
Ismail MM Kamel MM Mohamed LW Faggal SI Galal MA 《Molecules (Basel, Switzerland)》2012,17(6):7217-7231
A series of new thiophene derivatives has been synthesized using the Gewald protocol. The acetylcholinesterase inhibition activity was assayed according to Ellman's method using donepezil as reference. Some of the compounds were found to be more potent inhibitors than the reference. 2-(2-(4-(4-Methoxyphenyl)piperazin-1-yl)acetamido)-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxamide (IIId) showed 60% inhibition, compared to only 40% inhibition by donepezil. 相似文献
13.
14.
为了寻找结构新颖的生物活性分子,采用活性亚结构拼接原理设计合成了12个哌嗪取代呋喃查尔酮衍生物(3a~3l),其结构经~1H NMR、~(13)C NMR和HRMS确证。分别采用MTT法和小鼠巨噬细胞Raw264.7炎症模型对目标化合物的体外细胞毒活性和抗炎活性进行测试,结果表明,哌嗪环上的取代基对化合物的生物活性有明显的影响。特别是化合物3j和3k对肿瘤细胞株Hela和A549均表现出良好的体外抑制活性,而且化合物3d能有效抑制NO的生成,值得进一步研究。 相似文献
15.
Hua Han ZhengQing Li ZhenLei Gao Xin Yin PeiLiang Dong BingYou Yang 《Natural product research》2019,33(19):2845-2850
Picrorhizae Rhizoma as a hepatoprotective herb, has been applied for thousands of years, and picroside was proved to be its active constituent. In this study, twelve derivatives of picroside were synthesized and the hepatoprotective activity of the derivatives was evaluated on SMMC-7721 cells. Six out of the derivatives had shown a better protective effect on H2O2-induced SMMC-7221 cells than picroside, and the activity of two derivatives (2 and 4) was stronger than that of the reference compound, silybin. Compound 2 shown the strongest protective effect (EC50?=?6.064?±?1.295?μM). 相似文献
16.
17.
Wael A. El-Sayed Farag A. El-Essawy Omar M. Ali Barsis S. Nasr Mohamed M. Abdalla Adel A.-H. Abdel-Rahman 《Monatshefte für Chemie / Chemical Monthly》2010,20(4):1021-1028
Abstract
A number of new 5-[(naphthalen-1-yloxy)-methyl]-1,3,4-oxadiazole derivatives were synthesized. Sugar 2-[5-[(naphthalen-1-yloxy)methyl]-1,3,4-oxadiazol-2-ylthio]acetohydrazones were prepared by condensation of the hydrazide with the corresponding monosaccharides. Cyclization of the sugar hydrazones with acetic anhydride afforded the substituted oxadiazoline derivatives. The synthesized compounds displayed different degrees of antiviral activities or inhibitory actions against HCV and HIV viruses. 相似文献18.
A series of Andro derivatives were described and evaluated for their anti-HIV activity in vitro.Compound 10 and 16b,of which TI were>10,had some anti-HTV-l activity in vitro.Therein,compound 10 which was the best potent compound,could serve as a new lead for further development of anti-AIDS agents. 相似文献
19.
20.
New analogues of n-butylphthalide (NBP) bearing various lengths of alkyl and different substitution at the two-position of phthalide were designed and synthesised. Preliminary evaluation and prediction of ACD LogP software indicate that the derivatives display significant improvement in water solubility than NBP does. Further biological analysis showed that NBP analogues specifically inhibit platelet aggregation induced by arachidonic acid but have no effect on that induced by adenosine 5-diphosphate. Especially compounds 1 and 3 were stronger than classical anti-platelet drug, aspirin, and equal potent with NBP, respectively. These findings provide an alternative approach to the development of NBP analogues with anti-platelet aggregation activity with good water solubility for the intervention of ischemic stroke. 相似文献