N-取代苯基-N＇-（1，3，4-噻二唑-2-基）脲类化合物的合成与生物活性

通过酰基叠氮化物与2-氨基噻二唑或5-氨基-2-巯基噻二唑反应，合成了10个新的N-取代苯基-N'-(1，3，4-噻二唑-2-基)脲，用核磁共振氢谱、红外光谱和元素分析确证了它们的结构，初步的生测活性试验表明，部分目标化合物2c，2d具有良好的细胞分裂素活性．     

2-芳基-5-(5-苯基-2H-四唑-2-亚甲基-1,3,4- 二唑类化合物的研究

本文研究了用N-(5-苯基-2H-四唑-2-乙酰基)-N'-芳酰肼制备分子中既有四唑, 1,3,4- 二唑环的2-芳基-5-(5-苯基-2H-四唑-2-亚甲基)-1,3,4- 二唑。并对化合物进行了质谱研究。     

N-[5-（1-对氯苯氧乙基）-1，3，4-噻二唑-2-基]-N′-芳氧乙酰基硫脲的合成与生物活性

通过2-氨基15-(1-对氯苯氧乙基)-1，3，4-噻二唑与芳氧乙酰基异硫氰酸酯反应，合成了9种新的N-5-[(1-对氯苯氧乙基)-1，3，4-噻二唑-2-基]-N′-芳氧乙酰基硫脲，其结构经^1HNMR，IR和元素分析确证。初步的生物活性测定结果表明，部分目标化合物具有良好的植物生长调节活性。     

3-（2-呋喃基）-4-芳基-1，2，4-三唑啉-5-硫酮的合成及生物活性

1-（2-呋喃甲酰基）-4-芳基氨基硫脲经过环化反应，制备了一系列新的化合 物3-（2-呋喃基）-4-芳基-1，2，4-三唑啉-5-硫酮类化合物，并通过元素分析和 IR，^1H NMR等波谱数据确证了上述化合物的结构。初步的生物活性实验表明其中 有些化合物的具有非常好的植物生长调节活性。     

3-氰基-2-羟基吡啶磷酸酯的合成

β-酮醛和氰乙酰胺在碱的作用下环化得到3-氰基-2-羟基吡啶,用亚磷酸二乙酯在Atherton-Todd条件下磷酰化可以高产率得到3-氰基-2-羟基吡啶磷酸二乙酯,这些化合物显示了一定的生物活性,并可用于磷酸酯酶抑制剂的活性结构的设计。     

2-氰基-3-N-烷氨基-3-(N-2-氟苯乙氨基)丙烯酸乙酯类化合物的合成及生物活性研究

把由氰基乙酸乙酯、二硫化碳、硫酸二甲酯在乙醇钠作用下反应得到的2-氰基.3,3-二甲硫基丙烯酸乙酯中间体用邻氟苯乙胺胺化,再和甲胺等烷胺进行胺化反应,合成了含氟2-氰基丙烯酸乙酯类化合物.结构经元素分析、IR、1H NMR、13C NMR等证实,抗烟草花叶病毒(TMV)生物活性的初步测定表明,所合成的化合物有一定抗TMV活性.     

2-（1H-咪唑-1-基）-1-（2，3，4-三甲氧基）苯乙酮肟酯新化合物合成与生物活性研究

首次合成了12个2-（1H-咪唑-1-基）-1-（2，3，4-三甲氧基）苯乙酮肟酯新 化合物，并经元素分析、红外光谱、核磁共振氢谱对其结构进行了表征，初步生物 活性测试表明，有些化合物具有杀菌活性。研究了这些新化合物结构与光谱特征之 间的关系。     

2-芳基-5-(2-苯基-4-喹啉基)-1,3,4- 二唑衍生物的合成及其相关性质的研究

本文选择淘汰的解热镇痛, 去风湿药物2-苯基-4-喹啉甲酸(辛可芬)制成芳酰基化合物, 然后用POCl3脱水, 得到一些新的2-芳基-5-(2-苯基-4-喹啉基)-1,3,4-恶二唑(2)。该化合物在医学、农药、染料、涂料, 高分子合成材料以及有机闪烁材料等方面有广泛用途。     

N-(5-对三氟甲基苯基-1,3,4-噻二唑-2-基)-N''''-芳酰基硫脲的合成及生物活性

用2-氨基-5-对三氟甲基苯基1，3，4-噻二唑与芳酰基异硫氰酸酯反应，合成了14种新的标题化合物（3a-3n），其的结构经1^H NMR，IR和元素分析确证。室内初步的生物活性测定试验表明，部分标题化合物具有良好的植物生长调节活性，其中3e，3g和3m的生长素活性更好。     

(R)-甲基 2-(2-（5-氟-2,4-二氧-3,4-二氢嘧啶-1（2H）-基）乙酰胺基) 丙酸甲酯（5-FUAPM）的合成、结构分析及生物活性测试

报道了一种新的二肽化合物(R)-甲基 2-(2-（5-氟-2,4-二氧-3,4-二氢嘧啶-1（2H）-基）乙酰胺基) 丙酸甲酯（5-FUAPM）的合成，并对其用元素分析、红外光谱、核磁共振氢谱和碳谱进行了表征。同时得到了该化合物与DMF的加合物(5-FUAPM•DMF)晶体，采用热重分析，并通过单晶X 射线衍射确定了其晶体结构。晶体属正交晶系,空间群为P2₁2₁2₁，晶胞参数为：a＝0.4740(7) nm，b＝1.923 (3) nm，c＝1.9229 nm，α=β=γ＝90°，V＝1.753nm³，Z＝4，D_c = 1.312 g/cm³，M_r = 346.32，F(000) = 728，μ＝0.111 mm^－1。可观测点精修最终偏离因子: R＝0.1378，wR＝0.2862。生物活性测试表明5-FUAPM具有一定的抗癌活性。     

Current perspectives on benzoflavone analogues with potent biological activities: A review

Medicinal chemistry investigators have isolated and synthesized benzoflavone analogues with diverse bioactivities including enzyme inhibitory activity, central nervous system (CNS) activity, anti-inflammatory activity, anti-microorganism activity, hypoglycemic activity, and receptor modulating potential. SAR (Structure-Activity Relationship) studies have been conducted extensively and plenty of benzoflavone analogues have been prepared for potential targets. Herein, we review the pharmacology properties and SAR for benzoflavone analogues, and provide a brief summarization of synthetic strategies, wishing to give perspective on the research and development of benzoflavone derivatives.     

Design,synthesis,characterization,cytotoxic and structure activity relationships of novel Ru(Ⅱ) complexes

Platinum containing compounds have shown antineoplastic potential, but their clinical applications have been limited by high toxicity. Ruthenium containing complexes have long been known to be well suited for biological applications, and have long been utilized as replacements to popular platinum based-drugs. Here, we report a novel series of ruthenium(II) arene compounds bearing thiosemicarbazone and isonicotinylhydrazone ligands with potent anticancer activity their structure activity relationships and apoptosis was studied. The cytotoxic activity of the new ruthenium(II) arene compounds has been evaluated in several cell lines (Molt 4/C8, L1210, CEM, HL60 and BEL7402). Among them, ten complexes were found to be excellent in vitro growth inhibitory activity against various cell lines with IC50 in the sub-micromolar range.     

Yolk-shell gold nanoparticles as model materials for support-effect studies in heterogeneous catalysis: Au, @C and Au, @ZrO2 for CO oxidation as an example

The use of nanostructured yolk-shell materials offers a way to discriminate support and particle-size effects for mechanistic studies in heterogeneous catalysis. Herein, gold yolk-shell materials have been synthesized and used as model catalysts for the investigation of support effects in CO oxidation. Carbon has been selected as catalytically inert support to study the intrinsic activity of the gold nanoparticles, and for comparison, zirconia has been used as oxidic support. Au, @C materials have been synthesized through nanocasting using two different nonporous-core@mesoporous-shell exotemplates: Au@SiO(2)@ZrO(2) and Au@SiO(2)@m-SiO(2). The catalytic activity of Au, @C with a gold core of about 14 nm has been evaluated and compared with Au, @ZrO(2) of the same gold core size. The strong positive effect of metal oxide as support material on the activity of gold has been proved. Additionally, size effects were investigated using carbon as support to determine only the contribution of the nanoparticle size on the catalytic activity of gold. Therefore, Au, @C with a gold core of about 7 nm was studied showing a less pronounced positive effect on the activity than the metal oxide support effect.     

Syntheses of 1,5-Benzothiazepines: Part XXXVI—Syntheses and Antimicrobial Evaluation of 2-(2-Chlorophenyl)-4-(4-chlorophenyl/2-thienyl)-2,5-dihydro-8-substituted-1,5-benzothiazepines

Six 5-substituted-2-aminobenzenethiols have been reacted with 3-(2-chlorophenyl)-1-(4-chlorophenyl)-2-propenone and 3-(2-chlorophenyl)-1-(2-thienyl)-2-propenone in dry ethanol saturated with dry HCl gas, to obtain twelve new compounds, 8-substituted-2-(2-chlorophenyl)-4-(4-chlorophenyl/2-thienyl)-2,5-dihydro-1,5-benzothiazepines in satisfactory yields. The structures of the final products have been assigned by elemental microanalyses data for elements, C, H, and N and by IR, ¹ H NMR, and mass spectroscopies. The synthesized compounds have been evaluated for their relative antimicrobial activity against the gram-positive bacteria, Staphylococcus aureus, gram-negative bacteria, Pseudomonas aeruginosa and the fungus, Candida albicans. The compounds have been found to show little antibacterial activity, but interestingly, showed significant antifungal activity.     

Synthesis and Antibacterial Activity of New Diaryldiamines

Several new quinolines and quinazolines ( 4, 10, 13 ) have been synthesized from cheap and readily available chemicals through a series of simple chemical transformations. Most of the synthesized compounds have been evaluated for antibacterial activity against Gram positive and Gram negative strains. Some of the synthesized compounds displayed interesting activity but not very promising for further development.     

Hydrogen-bonding effects,electrostatic potential,and the antitumor activity of flavone acetic acid and related compounds. I. Ab initio studies on the first stable conformations

Ab initio investigations have been carried out to account for the antitumor activity of flavone acetic acid (FAA) and related compounds. The hydrogen-bonding conformation was chosen for all the compounds and obtained through a restricted geometry optimization with the 3-21G basis set. Three key regions in the molecular electrostatic potential isosurfaces [V( r ) ～ ?0.015 au] are found to be involved in the activity. Region 1 is the most important. Its existence implies the activity and its size determines the strength of the activity. Region 2 is another factor which can change the strength of the activity. Region 3 corresponds to the hydrogen-bonding effects which have been analyzed in detail, but its role is still not clear. Finally, basis-set effects on the molecular electrostatic potential have been briefly discussed. © 1995 John Wiley & Sons, Inc.     

Antitumor activity of stilbenoids and flavonoids isolated from Acanthopanax brachypus

This report is the first to detail the antitumor activity of Acanthopanax brachypus, a species well recognized by eastern folk medicine. Four stilbeniods and nine flavonoids have been isolated from stem bark of the plant. The isolates have been tested for their antitumor activity against selected human cancer cell lines (HgpG-2, MCF-7, K-562, and A-549). Even though three of the compounds have shown high to moderate cytotoxicity against certain cell lines (IC₅₀ of 4.5 to 6.5 μg/mL), in most of the experiments little or no anticancer activity has been revealed.     

Motuporamines, anti-invasion and anti-angiogenic alkaloids from the marine sponge Xestospongia exigua (Kirkpatrick): isolation, structure elucidation, analogue synthesis, and conformational analysis.

Extracts of the sponge Xestospongia exigua collected in Papua New Guinea were positive in a new assay for anti-invasion activity. Bioassay-guided fractionation led to the identification of the three known motuporamines A (1), B (2), and C (3) along with the new motuporamines D (4), E (5), and F (6) and a mixture of G, H, and I (15). Motuporamines A (1), B (2), and C (3) and the mixture of G, H, and I (15) were responsible for the anti-invasion activity of the crude extract. Motuporamine C (3) has also been found to be anti-angiogenic. A series of analogues of the motuporamines have been synthesized and evaluated for anti-invasive activity. These SAR results revealed that a saturated 15-membered cyclic amine fused to the natural motuporamine diamine side chain (13) represented the optimal structure for anti-invasive activity in this family. Single-crystal X-ray diffraction analysis of one of the analogues 20 showed that in the solid state its 16-membered macrocyclic amine fragment adopted the [4444] quadrangular conformation predicted by calculations to be the lowest energy conformation for the corresponding cycloalkane, cyclohexadecane. These data along with literature X-ray data and conformational analysis for derivatives of azacyclotridecane have been used as precedents for predicting the lowest energy ring conformations of other motuporamines. The SAR data from the natural and synthetic motuporamines have been combined with the conformational analyses to provide an outline of the functionality and shape required for activity in this family of alkaloids and to design a new analogue 49 that showed good anti-invasion activity.     

Experimental data of isobaric vapour–liquid equilibrium for binary mixtures containing tetrahydrofuran and isomeric chlorobutanes

Isobaric vapour–liquid equilibrium (VLE) measurements for mixtures formed by tetrahydrofuran and isomeric chlorobutanes at 40.0?kPa (except for the mixture containing 2-methyl-2-chloropropane) and 101.3?kPa are reported. The activity coefficients were calculated from experimental data. The mixture containing 2-chlorobutane at 40.0?kPa presents an azeotrope. The VLE measurements have been found thermodynamically consistent according to Van Ness test. Wilson, NRTL, and UNIQUAC equations have been used to correlate the activity coefficients and we have obtained satisfactory results.     

Synthesis, infrared spectra and thermal studies of Zn(II), Cd(II) and Hg(II) complexes with 2-aminobenzaldehyde phenylhydrazone "nitrin" ligand

The, nitrin, 2-aminobenzaldehyde phenylhydrazone (2ABPH) was synthesis by refluxing 2-nitrobenzaldehyde with phenylhydrazine in ethanolic solvent. Three transition metal (II) complexes of 2ABPH have been prepared. Elemental analysis, molar conductivity, IR, UV, 1H NMR, and mass spectra, as well as TG/DTG have been used to characterize these complexes. The complexes have the general formula [M(2ABPH)2]Cl2.nH2O, where M=Zn, Cd, and Hg and n=4, 2 and 0 for Zn(II), Cd(II) and Hg(II), respectively. The ligand and its complexes have been studied for their possible biological activity including antibacterial and antifungal activity.