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为了从喹唑啉衍生物中寻找高活性的抗肿瘤分子,以2-氨基苯甲酰胺为原料,经过三氟乙酰化、环化、氯代以及偶联反应等,合成了21个2-三氟甲基喹唑啉类化合物,并通过1H NMR、13C NMR、19F NMR进行结构确证。采用四唑盐(MTT)法评价目标化合物的体外抗肿瘤活性,结果表明,部分所合成的喹唑啉衍生物对人前列腺癌细胞(PC3、LNCaP)、人慢性髓系白血病细胞(K562)、宫颈癌细胞(Hela)以及人肺癌细胞(A549)具有抗增殖活性,其中活性较好的化合物5a和5b在5μmol/L时对LNCaP细胞增殖的抑制活性分别为61.7%、62.8%。此外N-甲基化产物5a和5b的体外抗肿瘤活性较原型化合物(4a和4b)显著提高,这为该类化合物的深入研究提供了参考依据。 相似文献
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以色酮-吡唑啉酮作为C1合成子, 在5 mol% 的DBU催化下,与α,β-不饱和酮发生Michael加成反应, 获得了10个色酮吡唑啉酮类衍生物3a~3j,产率76%~90%, dr值为4/1~9/1, 其结构经1H NMR, 13C NMR和HR-MS(ESI-TOF)表征,通过单晶进一步进行了确定化合物3b的相对构型。该类化合物包含有连续两个立体中心,包括一个季碳中心,可以为生物活性筛选提供物质基础。采用MTT法研究了3a~3f对人白血病细胞(K562)的体外抗增殖活性。结果表明:化合物3a, 3c, 3d和3i对K562增殖具有一定的抑制活性。 相似文献
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为寻找高效低毒的含三氟甲基取代的喹唑啉类新型抗肿瘤活性化合物,以2-硝基-5-氯苯甲酸为原料,通过水解、还原、偶联、环合、三氟甲基加成消除等反应,合成了14个2-芳基-4-三氟甲基喹唑啉衍生物,并通过1H NMR、13C NMR、19F NMR等进行了结构确证。采用MTT法评价了目标化合物对PC3(前列腺癌细胞)、LNCaP(前列腺癌细胞)、K562(人慢性髓系白血病细胞)、HeLa(宫颈癌细胞)和A549(人肺癌细胞)等肿瘤细胞株的生长抑制活性。结果显示,在5μmol/L浓度下,部分目标化合物对上述5种肿瘤细胞均具有较好的生长抑制活性,其中,化合物8c、13e对LNCaP细胞的IC50(半数抑制浓度)分别为2.9和1.9μmol/L,值得进一步深入研究。 相似文献
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以N-甲基乙酰胺或N-甲基苯甲酰胺为起始原料,与氯乙酰氯经酰化反应后,与叠氮钠经取代反应制得二酰亚胺(2); 2在三苯基膦的催化下发生分子内氮杂Witting反应制得关键中间体--咪唑啉酮(3); 3与芳醛在碱性条件下经缩合反应合成了8个新型的GFP生色团衍生物(5a~5h),其结构经1H NMR和13C NMR表征。对5a~5h的激发波长和发射波长进行了研究。结果表明,与对羟基苯咪唑啉酮(p-HOBDI)相比,大部分化合物的发射波长发生了比较显著的红移,其中2-羟基5-硝基苯咪唑啉酮(5f)的发射波长达614 nm。 相似文献
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以2-氨基-6-甲基苯甲酸为起始原料,通过合环反应生成两种4-氧代-3(4H)-喹唑啉-5-羧酸衍生物(1a, 1b), 1a, 1b分别经高锰酸钾氧化合成了4-氧代-3(4H)-喹唑啉-5-羧酸(2a, 2b),其结构经1H NMR, 13C NMR和MS表征。研究了投料比{r[n(高锰酸钾) :n(5-甲基-3(4H)-喹唑啉-4-酮)]}和反应温度等对收率的影响。结果表明:在最佳反应条件(r=7:1,中性高锰酸钾氧化,于90 ℃反应)下合成2总收率可达66%。 相似文献
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新型2,6-双(3,5-二取代吡唑基-1-羰基)吡啶的合成 总被引:9,自引:0,他引:9
报道了四种吡唑衍生物和它们四种新型的杂环酰胺衍生物的合成 ,它们是 3 ,5 二甲基吡唑 (1) ,5 甲基 3 苯基吡唑(2 ) ,3 ,5 二苯基吡唑 (3 ) ,5 甲基 3 二茂铁基吡唑 (4 ) ,2 ,6 双 (3 ,5 二甲基吡唑基 1 羰基 )吡啶 (5 ) ,2 ,6 双 (5 甲基 3 苯基吡唑基 1 羰基 )吡啶 (6) ,2 ,6 双 (3 ,5 二苯基吡唑基 1 羰基 )吡啶 (7)和 2 ,6 双 (5 甲基 3 二茂铁基吡唑基 1 羰基 )吡啶 (8) .并对它们进行了元素分析 ,FT IR ,1HNMR和13 CNMR等波谱分析 . 相似文献
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Two series of novel derivatives of pyridine‐2,6‐dicarboxylic acid with potential as polydentate ligands were synthesized from pyridine‐2,6‐dicarboxylic acid. All new compounds were characterized by NMR, MS, IR, and EA. 相似文献
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Kamitakahara H Koschella A Mikawa Y Nakatsubo F Heinze T Klemm D 《Macromolecular bioscience》2008,8(7):690-700
2,6-Di-O-methylcellulose was prepared from natural and synthetic celluloses. Natural cellulose was converted to 2,6-di-O-thexyldimethylsilylcellulose, then to 3-mono-O-allyl-2,6-di-O-methylcellulose, and finally into 2,6-di-O-methylcellulose. Alternatively, 2,6 di-O-methylcellulose was synthesized from the synthetic cellulose derivative 3-mono-O-benzyl-2,6-di-O-pivaloylcellulose by depivaloylation and methylation to give 3-mono-O-benzyl-2,6-di-O-methylcellulose, which was debenzylated to yield the dimethyl ether. Both types of 2,6-di-O-methylcellulose are insoluble in water and common organic solvents. The structures of all cellulose derivatives were determined by NMR. 相似文献
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Molecular rotors: design, synthesis, structural analysis, and silver complex of new [7.7]cyclophanes
Bogdan N Grosu I Benoît G Toupet L Ramondenc Y Condamine E Silaghi-Dumitrescu I Plé G 《Organic letters》2006,8(12):2619-2622
New molecular rotors, [7.7](2,6)pyridinocyclophanes (monomers and dimers) embedding 1,3-dioxanes in the bridges, were investigated by variable-temperature NMR, molecular modeling, and single-crystal X-ray diffractometry. The nitrogen-inside rotation of the pyridine ring is more hindered in the derivatives with longer distance between the bridges (i.e., para > meta and 2,6-pyridylene > ortho) and can be chemically stopped by complexation with CF(3)SO(3)Ag. [structure: see text] 相似文献
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4,4[prime or minute]-Methylenebis(N-salicylidene-2,6-dialkylaniline) derivatives were prepared and their structures were determined by (1)H NMR, IR, DSC and X-ray crystallographic analyses. The 2,6-diisopropylaniline derivative yielded definite polymorphic crystals: the space groups of the crystals were C2/c and P2(1)/n, respectively. It was found that both polymorphs were similarly photochromic but the thermal stability of the photochrome was different due to the variance of the shape of molecule and cavity in each crystal. 相似文献
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Alexandru T. Balaban Cornelia Uncuţ/a Mihai Elian Filip Chiraleu Antonie Dinculescu 《Tetrahedron》1984,40(13):2547-2553
Pairwise chemical shift nonequivalence of the 2,6-methyl and 3,5-protons in 1H NMR spectra, as well as of the 2,6-methyl, 2,6-ring and 3,5-ring carbons in 13C NMR spectra, was observed for N-alkyl-2,4,6-trimethylpyridinium salts 2. Dynamic NMR spectroscopy demonstrates appreciably higher activation free energies ΔG# for rotation around the N(sp2)-C(sp3 bond than ΔG# for the analogously substituted mesityl derivatives, in agreement with the shorter N-C bond distance than for the C-C bond. 相似文献
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A multiple-use macrocycle recognizes dibenzylammonium ions and 2,6-lutidine derivatives, each in a [2]pseudorotaxane-like manner, through interactions with its diethylene glycol (hydrogen bonding) and 2,6-pyridinedicarboxamide (Pd2+ chelation) spacers, respectively. We characterized these complexes in the solid state (X-ray crystallography) and in solution (1H NMR spectroscopy). The synthesis of two corresponding [2]rotaxanes confirmed that these recognition systems possess [2]pseudorotaxane geometries in solution. 相似文献
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Haihua Xiao Pingliang Li Jinhui Hu Ruixia Li Limin Wu Dongcai Guo 《Applied biochemistry and biotechnology》2014,172(4):2188-2196
The reaction of 5,5′-(pyridine-2,6-diyl)bis(4-amino-3-mercapto-1,2,4-triazole) with various aromatic aldehydes in acetic acid yielded the corresponding 5,5′-(pyridine-2,6-diyl)bis(4-arylideneamino-3-mercapto-1,2,4-triazole) derivatives. The structures of the synthesized compounds as well as their intermediates were confirmed by elemental analysis, infrared spectra, 1H NMR spectra and mass spectra studies. All the synthesized title compounds were screened for their antibacterial activities, and the preliminary results revealed that some of them showed good activities against Escherichia coli and Pseudomonas aeruginosa. 相似文献
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María DS Farrán MÁ García MÁ Pinilla E Torres MR Elguero J Claramunt RM 《The Journal of organic chemistry》2011,76(16):6780-6788
Four hosts (7-10) containing 2,6-bisamidopyridine- and 2,5-bisamidopyrrole-bearing pyridyl or 1,8-naphthyridyl groups have been prepared and their structures studied by a combination of multinuclear NMR spectroscopy and X-ray crystallography. Their behavior in molecular recognition of urea derivatives, including (+)-biotin methyl ester, has been approached by molecular modeling (Monte Carlo conformational search, AMBER force field). The minimum energy values for the complexes are correlated with the experimental binding energies determined by means of (1)H NMR titrations. 相似文献