N'-(2-羟基-4-甲基-苯甲酰胺基)-2-亚胺基-4-噻唑烷酮的合成及生物活性

为探讨4-噻唑烷酮衍生物的生物活性,用4-甲基水杨酸甲酯和水合肼作为原料反应得到4-甲基水杨酰肼,再将其与硫氰酸钾合成得4-甲基水杨酰氨基硫脲,最后与溴代乙酸乙酯反应合成终产物N'-(2-羟基-4-甲基苯甲酰胺基)-2-亚胺基-4-噻唑烷酮.对其进行了~(13)C NMR、IR、~1H NMR和元素分析表征,并对该化合物进行了体内抗炎活性和体外抗菌活性的测试.结果表明:该化合物具有较好的抗炎和抗菌活性.     

2,4-噻唑烷二酮衍生物抑制酪氨酸酶活性研究

以2,4-噻唑烷二酮和取代芳香醛为起始原料,反应得到一系列2,4-噻唑烷二酮衍生物,并对所合成化合物进行了抑制酪氨酸酶活性测试,结果表明化合物均有一定的抑制酪氨酸酶活性,化合物1((E)-5-(3-氯苯亚甲基)噻唑烷-2,4-二酮)和化合物2((E)-5-(2,4-二氯苯亚甲基)噻唑烷-2,4-二酮)活性强于阳性对照曲酸,其中化合物1表现出最好的抑制酪氨酸酶活性,其IC_(50)值为18. 43μmol/L。优选化合物1进行了抑制机理探讨,结果表明其为不可逆抑制剂,同时对化合物1进行了分子对接研究。     

4-芳基-2-(2-羟苄亚氨基)噻唑类化合物的合成与杀菌活性

以α-溴芳基酮与硫脲反应环合得4-芳基-2-氨基噻唑,4-芳基-2-氨基噻唑与水杨醛反应制备了9种4-芳基-2-(2-羟苄亚氨基)噻唑类化合物. 新化合物结构经1HNMR确证. 初步的杀菌活性测定结果表明:在500 mg/L的试验浓度下,化合物(E)-4-(3-三氟甲基苯)-2-(2-羟苄亚氨基)噻唑对水稻纹枯病菌的抑制率为60.0%,化合物(E)-4-(2-氯-4-(4-氯苄基)苯)-2-(2-羟苄亚氨基)噻唑和(E)-4-(3-氯苯)-2-(2-羟苄亚氨基)-5-甲基噻唑对油菜菌核病菌的抑制率分别为65.4%和56.1%.     

1-(吡啶-3-甲基)-2-乙基苯并咪唑的合成及抑菌活性

以2-乙基苯并咪唑和3-氯甲基吡啶反应得到新化合物1-(吡啶-3-甲基)-2-乙基苯并咪唑,利用MS、1H NMR、IR等方法对其进行了表征,并用X射线单晶衍射确定了其晶体结构,对该化合物抑菌活性研究表明1-(吡啶-3-甲基)-2-乙基苯并咪唑对植物病原真菌有不同程度的抑制作用,对水稻纹枯病菌、梨褐斑病菌、稻瘟病菌有较高的抑菌活性;对实验所用的大肠杆菌、金黄色葡萄球菌等细菌的抑菌效果不明显.     

取代-3-甲酰基色酮与麦氏酸的固相缩合反应

在无溶剂无催化剂条件下,采用石蜡油加热的方法,由取代-3-甲酰基色酮与麦氏酸通过Knoeve-nagel缩合反应合成了一系列5-(色酮基-3-亚甲基)麦氏酸类化合物,收率70%~87%,产物结构经IR,1H NMR确认.     

2-取代苯甲酰氨基-5-苯甲叉基-4-噻唑酮衍生物的合成与生物活性研究

选择硫脲为起始原料,与溴乙酸乙酯一步反应生成2-亚氨基-4-噻唑烷酮(2),与苯甲醛缩合得2-氨基-5-苯甲叉基-4-噻唑酮(3),再与取代苯甲酰氯反应,合成了7个未见文献报道的噻唑酮类化合物.通过IR,1 H NMR,13 C NMR和元素分析对目标化合物进行了结构鉴定,测定了它们的抗肿瘤活性和杀菌活性.结果表明:部分测试化合物对肿瘤细胞KB和CNE2有一定的抑制作用,化合物4a对6种病菌都有不同程度的抑制活性.     

含硫的N-甲氧基氨基甲酸甲酯的合成及生物活性

为了寻找高效、低毒的新农药,采用活性结构拼接法合成了7个具有新型结构的N-甲氧基-N-[2-(甲硫基亚甲基-取代苯亚胺-硫亚甲基)苯基]氨基甲酸甲酯化合物.其结构经1H NMR,IR,LC/MS进行了表征.生物活性测定表明:5b,5g在50 mg/L下对稻瘟病(Pyricularia oryzae)的抑菌活性达90%.     

4-水杨醛亚氨基-3-烷基-1, 2, 4-三唑-5-硫酮合成和晶体结构

合成了5个4-水杨醛亚氨基-3-烷基-1,2,4-三唑-5-硫酮化合物,并用IR和1H NMR手段对这些化合物进行了表征.通过X-Ray单晶衍射方法对化合物4-水杨醛亚氨基-3-甲基-1,2,4-三唑-5-硫酮 (IIa)结构进行了测定,确定该晶体属于单斜晶系,空间群为P21/n, 晶胞参数a=1.2697(3), b=0.7407(15), c=1.2750(3)nm, β=117.68(3)°, V=1.06185 (4)(nm)3,Z=4,Dc=1.465g/cm3, μ=0.288mm-1,F(000)=488, R=0.058, wR=0.164.其中独立衍射点数为2660个,2130个为可观察衍射点(I>2σ(I))用于结构测定和修正.结果表明所有目标产物4-水杨醛亚氨基-3-烷基-1, 2, 4-三唑-5-硫酮(IIa～c, IIId～e)中甲亚胺(C N)构型是E构型(反式),并且是硫酮式互变异构体而不是硫醇式,并且化合物的所有非氢原子共平面.     

4-噻唑酮羧酸衍生物的合成

合成了具有潜在杀菌活性的3-苯基-5-苯亚甲基-2-苯氨基噻唑-4-酮的羧酸衍生物.以邻乙基苯胺为原料,合成中间体N,N′-二(2-乙基苯)硫脲(Ⅰ)和2-(2-乙基)苯基-3-(2-乙基)苯基噻唑-4-酮(Ⅱa),化合物Ⅱa与不同的底物醛发生缩合反应生成2-(2-乙基)苯基-3-(2-乙基)苯基-5-苯亚甲基噻唑-4-酮(Ⅲ),化合物Ⅲ经过加成反应和水解反应,得到目标化合物.同时以二苯基硫脲为原料合成一个类似物,共合成3种3-苯基-5-苯亚甲基-2-苯氨基噻唑-4-酮的羧酸衍生物.产物经核磁共振谱、质谱表征,产物纯度采用高效液相色谱法测定,均大于98%.     

1,4-二取代苯基-5-氨基-1,2,3-三唑的合成及生物活性测定

本文以4-取代苯胺为原料,经重氮化、叠氮化合成得到4-取代叠氮苯中间体,再与对甲基苯乙腈闭环反应得到5种1,4-二取代苯基-5-氨基-1,2,3-三唑目标化合物,并利用IR、1H NMR、13C NMR进行结构表征.然后对目标化合物进行了抑菌活性测试,测试结果表明,当目标化合物质量浓度为0.01％时,对M.a、E.c.、S.a.具有明显的抑菌效果.构效关系研究发现,三唑环1位苯环上有卤原子取代时抑菌效果高于无取代及甲基取代.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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