导入苯并含氮杂环的嘧啶类衍生物的合成

三种N－氯乙酰取代的苯并含氮杂环化合物通过硫醚键的形成被导入嘧啶结构。新的嘧啶化合物的结构经MS，HNMR，CNMR和元素分析得到表征。     

N'-(4,5,6-三取代嘧啶-2-基)-α-氯乙酰脲的合成及生物活性测定

合成了9种含多取代嘧啶环的α-氯乙酰脲,其中8种为新化合物.结构经IR,1H NMR,MS和元素分析测试而确证,初步生物活性测试结果表明：标题化合物具有优良的生物活性,且嘧啶环上取代基的性质对此类化合物影响很大,含4羟基取代嘧啶环的标题化合物具有较好除草活性,而含4氯取代嘧啶环的化合物一般具有一定的植调活性.     

取代苯氧乙酰硫脲类嘧啶衍生物的合成及生物活性研究(Ⅱ)

取代苯氧乙酸经酰化、异流氰酸酯化、与取代-2-氨基嘧啶加成3步反应合成了10种未见文献报道的取代苯氧乙酰硫脲类嘧啶衍生物．结构经IR,HNMR和元素分析等测试方法而确证．用平皿法初步测定了目标化合物的生物活性,结果表明：4-硝基苯氧乙酰硫脲类嘧啶衍生物在低浓度时促进单子叶植物的生长,高浓度时抑制双子叶植物的生长．2,4-二氯苯氧乙酰硫脲类嘧啶衍生物,对单子叶和双子叶植物的生长均具有超高抑制活性．     

苯并含氮杂环取代的嘧啶类化合物的合成

设计并合成了四种苯并含氮杂环取代的嘧啶类新化合物,它们的结构经MS,IR和∧1H NMR分析得到确定。     

异脲盐法合成胍及其N-取代嘧啶胺衍生物的研究

采用异脲盐法合成一系列N-取代胍和N-取代-4-(3-吡啶基)嘧啶-2-胺类化合物。以O-甲基异脲硫酸盐为起始原料,与脂肪胺类或芳香胺类化合物反应合成脂肪胍或芳香胍类化合物(1),再以3-乙酰吡啶和N,N-二甲基甲酰胺二甲基缩醛(DMF-DMA)为原料反应合成3-(二甲基氨基)-1-(3-吡啶基)-2-丙烯-1-酮(2),将化合物(1)和(2)在碱性条件下反应,最终得到目标产物N-取代-4-(3-吡啶基)嘧啶-2-胺(3)。合成出了6个N-取代胍及其相应的衍生物N-取代-4-(3-吡啶基)嘧啶-2-胺类化合物,并用1H NMR,IR和元素分析表征了目标产物的结构。该方法路线简捷环保、原料廉价易得、反应条件较温和。     

N′—（4,5,6,—三取代嘧啶—2—基）—α—氯乙酰脲的合成及生物活性测定

合成了9种多取代嘧啶环的α-氯乙酰脲,其中8种为新化合物,结构经IR,1HNMR,MS和元素分析测试而确证,初步生物活性测试结果表明：标题化合物具有优良的生物活性,且嘧啶环上取代基的性质对此类化合物影响很大,含4－羟基取代嘧啶环的标题化合物具有较好除草活性,而含4－氯取代嘧啶环的化合物一般具有一定的植调活性。     

骨髓增殖性肿瘤治疗药物TG101348的合成工艺研究

研究了骨髓增殖性肿瘤治疗药物TG101348的合成工艺.将2,4-二羟基-5-甲基嘧啶与三氯氧磷、氨水发生氯化、取代反应生成2-氯-4-氨基-5-甲基嘧啶（Ⅲ）,而后Ⅲ与N-叔丁基-3-溴苯磺酰胺（Ⅰ）发生Buchwald偶联反应得到3-[（2-氯-5-甲基-4-嘧啶基）胺基]-N-（叔丁基）苯磺酰胺（Ⅳ）,Ⅳ再与CH3 OH-HCl反应得到3-[（2-氯-5-甲基-4-嘧啶基）胺基]-N-（叔丁基）苯磺酰胺盐酸盐（Ⅴ）,最后Ⅴ与1-（4-氨基苯氧乙基）吡咯烷（Ⅵ）发生亲核取代反应得到TG101348,HPLC测得TG101348的纯度为99.7;.     

取代苯氧乙酰硫脲类嘧啶衍生物的合成及生物活性研？…

取代苯氧乙酸经酰化，异硫氰酸酯化，与取代－２－氨基嘧啶加成３步反应合成了１０种未见文献报道的取代苯氧乙酰悄类嘧啶衍生物，结构经ＩＲ＾１ＨＮＭＲ和元素分析等测试方法而确证，用平皿法初步测定了目标化合物的生物活性，结果表明，４－硝基苯氧乙酰硫脲类嘧啶衍生物在低浓度时促进单子叶植物的生长，高浓度时抑制了双子叶植物的生长，２，４－二氯苯氧乙酰硫脲在嘧啶衍生物，对单子叶和双子叶植物的生长均具有超高抑制活性。     

取代苯氧乙酰硫脲类嘧啶衍生物的合成及生物活性研究(Ⅰ)

从时硝基苯酚出发经醚化、酰化、异硫氰酸酯化、与取代-2-氨基嘧啶加成4步反应．合成了6种未见义献报道的含取代嘧啶环的对硝从苯氧乙酰硫脲类化合物．结构经IR．HNMR和元素分析等测试而确证．初步的生物活性测定结果表明：部分目标化合物对单子叶植物（如稗草）的生长有较强的促进作用,而对双子叶植物（如油菜）的生长有很强的抑制活性．即具有优良的选择活性．     

4-或6-芳基取代的二氢嘧啶-4-酮的合成

报道了一价酮催化N-乙酰基-1-苯基炔丙基胺或N-苯甲酰基-炔丙基胺与对甲基苯磺酰叠氮反应生成4-或6-芳基取代的二氢嘧啶-4-酮的方法.该反应过程首先是发生铜催化的炔与叠氮化物反应生成乙烯亚胺中间体A,紧接着乙烯亚胺中间体A经过分子内环加成得到B,B再经过重排反应生成4-或6-芳基取代的二氢嘧啶-4-酮类化合物.采用...     

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.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

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