具有生物活性有机磷化合物研究ⅩⅩⅡ .S-烯丙基、S-丙二烯基硫赶磷酸酯的合成与杀虫活性

利用［３,３］重排反应分别将烯丙氧基不对称硫逐磷酸酯和炔丙氧基不对称硫逐磷酸酯转化成Ｓ－烯丙基硫赶磷酸酯和Ｓ－丙二烯基硫赶磷酸酯,用元素分析、ＩＲ、ＮＭＲ和ＭＳ对合成的硫赶磷酸酯进行表征,并进行了杀虫活性试验,初步研究了它们的构效关系．     

具有生物活性有机磷化合物研究

利用〔３,３〕重排反应分别将烯丙氧基不对称硫逐磷酸酯和炔丙氧基不对称硫逐磷酸酯转化成Ｓ－烯丙基硫赶磷酸酯和Ｓ－丙二烯基硫赶磷酸酯,用元素分析,ＩＲ,ＮＭＲ和ＭＳ对合成的硫赶磷酸酯进行表征,并进行了杀虫活性试验,初步研究了它们的构效关系。     

炔丙氧基不对称硫代磷酸酯硫逐—硫赶热力学重排反应…

Ｏ－芳基－Ｏ－甲基－Ｏ－炔丙基不对称硫代磷酸酯分别在苯、甲苯、对二甲苯溶剂中加热回流条件下，通过（３，３）硫逐－硫赶热力学重排反应，合成了一系列未见文献报道的Ｏ－芳基－Ｏ－甲基－Ｓ－累积二烯基不对称磷酸酯新化合物，其结构均得到ＩＲ、＾１Ｈ、ＮＭＲ、＾３１Ｐ ＮＭＲ、ＭＳ的证实。     

炔丙氧基不对称硫代磷酸酯硫逐－硫赶热力学重排反应研究

Ｏ－芳基－Ｏ－甲基－Ｏ－炔丙基不对称硫代磷酸酯分别在苯、甲苯、对二甲苯溶剂中加热回流条件下,通过［３,３］硫逐－硫赶热力学重排反应,合成了一系列未见文献报道的Ｏ－芳基－Ｏ－甲基－Ｓ－累积二烯基不对称磷酸酯新化合物,其结构均得到ＩＲ、１ＨＮＭＲ、３１ＰＮＭＲ、ＭＳ的证实．     

O—取代苯基—O—四氯乙基硫逐磷酰胺酯的合成及生物活性研究

ＰＣｌ５与Ｃｌ３ＣＣＨＯ加成后在低温下通入干燥的Ｈ２Ｓ／ｇ，可制得Ｃｌ３ＣＣＨＣｌＯＰ（Ｓ）Ｃｌ２（１），（１）依次与取代苯酚、胺反应合成了１２个具有生物活性的标题化合物。用ＩＲ、ＮＭＲ、ＭＳ和元素分析对其结构进行了表征。并讨论了合成方法、波谱性质和生物活性的规律。结果表明该类硫逐磷酰胺的抑制植物生长活性较高，而硫逐磷酸酯的杀虫活性较高。     

1-烯丙氧基-2-甲氧基甲氧基苯Claisen重排反应研究

在碱性条件下，邻苯二酚与CH3OCH2Cl反应得到邻羟基醚2，化合物2进一步与烯丙基溴反应得到重要中间体1-烯丙氧基-2-甲氧基甲氧基苯3，以3为Clalsen重排前体原料，在200～210℃，弱氧化剂硝基苯的存在下，模拟Photo-Claisen Rearrangement反应过程，得到了对位重排产物4和常规Clalsen重排所得不到的间位产物5，从而证明了在此条件下，有单线态和三线态自由基的产生，并对反应机理进行了推测．相关中间体及产物的结构通过IR、^1HNMR表征，表明成功合成了上述化合物，并对结果进行了合理的分析．     

无卤代烷下亚磷酸三烷基酯的重排

亚磷酸三烷基酯同卤化亚铜、乙腈－同回流时,它能直接重排成相应的烃基磷酸酯;与碘化亚铜回流时,亚磷酸酯的重排比与氯化亚铜有利;重排中烃基的活性次序是：甲基＞乙基＞丁基     

4烯丙氧基6乙酰基2乙酯基吡啶和4烯丙氧基2,6二乙酰基吡啶的合成

乙酰基吡啶是一种重要的希夫碱前驱体。以白屈氨酸为原料，经酯化反应，合成了4-羟基-2，6-二乙酯基吡啶，再与3-溴丙烯反应，得到4-烯丙氧基-2，6-二乙酯基吡啶。此产物与乙酸乙酯在乙醇纳催化下Claisen酯缩合反应，当控制乙醇钠与4-烯丙氧基-2，6-二乙酯基吡啶的摩尔比为0．9：1时，得4-烯丙氧基-6-乙酰基-2-乙酯基吡啶，而摩尔比为5：1时，得4-烯丙氧基-2，6-二乙酰基吡啶。其中4-烯丙氧基-6-乙酰基-2-乙酯基吡啶为首次报道合成。产物通过核磁共振和红外分析确认结构。     

由α—酰基—硫代半缩醛合成2—取代喹喔啉

利用Ｐｕｍｍｅｒｅｒ重排合成酰基－硫代半缩醛，并将它们与邻苯二胺反应生成２－取代喹喔啉。     

天然产物白藜芦醇的合成

以大茴香醇为原料，经溴代，Arbuzov重排反应，得到中间体对甲氧基苄基磷酸酯，再与3，5-二甲氧基苯甲醛经过Wittig—Horner缩合反应及脱甲基化反应合成反武产物白藜芦醇,反应中间体和目标化合物用IR，MS和^1HNMR进行了结构表征．本合成路线反应步骤少，原料价廉易得．     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

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