6-硝基-1,1′-联-2-萘酚的合成及仿生氧化反应

在温和的条件下合成得到6-硝基-1,1′-联-2-萘酚化合物。以CuCl2-乙醇胺络合物作为催化剂,在氧气存在条件下,硝基取代联萘酚可发生仿生氧化反应,得到二苯并呫吨类化合物。产物的结构经核磁、红外光谱、元素分析及质谱进行确证。     

(+)-和(-)-1,1’-联-2-萘酚的立体选择合成

使用光学活性的2-氨基丁醇-1、麻黄素、ψ-麻黄素、酒石酸和谷氨酸在KF·2H_2O存在下分别与Merrifield树脂反应制得8种相应的手征性树脂.由这些树脂和Cu(NO_3)_2作用后生成的Cu(Ⅱ)络合物树脂作为氧化偶合试剂,对2-萘酚的氧化偶合反应具有立体选择效果,可得致电46～58ee%的(+)-或(-)-1,1′-联-2-萘酚。     

无溶剂室温研磨合成N,N''''-二芳基-2-硝基-1,4-苯二氧基二乙酰胺

在无溶剂条件下，2-硝基-1，4-苯二氧基二乙酰氯与各种芳胺在室温下研磨可快速反应得到N，N′-二芳基-2-硝基-1，4-苯二氧基二乙酰胺(Ⅱa～Ⅱ1)．该法与传统的溶液法相比具有无有机溶剂污染、反应速度快、产率高和后处理简单等优点．     

2—[3—（5—硝基苯并异噻唑]—α—萘酚的合成、结构和性质研究

以2－氰基－4－硝基苯胺为原料合成了3－氨基－5-硝基－2、1－苯并异噻唑，并使之与α-萘酚偶联，得到2－[3-(5-硝基苯并异噻唑]－α-萘酚（5－NO2－BPAN）；测定了礤离解常数，并研究了它与金属离子的显色反应。     

(S)-6-乙烯基-2,2’-甲叉二氧基-1,1’-联萘的合成

以(S)-联萘酚为起始原料通过多步反应合成了(S)-6-乙烯基-2,2’-甲叉二氧基-1,1’-联萘﹒首先将(S)-联萘酚通过2步合成了(S)-6-溴-2-特戊酰氧基-2’-羟基-1,1’-联萘;再脱去特戊酰基得到了(S)-6-溴-2,2’-二羟基-1,1’-联萘;然后羟基醚化得到(S)-6-溴-2,2’-甲叉二氧基-1,1’-联萘;接下来与DMF反应得(S)-6-甲酰基-2,2’-甲叉二氧基-1,1’-联萘;最后通过维蒂希反应得标题化合物﹒研究优化了各步反应的实验条件,获得了较好的合成方案,通过~1H NMR和~(13)C NMR对各步产物进行了表征﹒     

双功能轴手性联二萘酚酰胺催化蒽酮和硝基烯烃的不对称Michael加成反应

探讨了双功能轴手性联二萘酚酰胺(1b)有机小分子催化蒽酮与硝基烯烃不对称Michael加成反应.研究表明,在35℃条件下,CH_2Cl_2中,0.050 mmol(x=10%)的催化剂存在下,反应20 h,蒽酮与硝基烯烃能有效的进行Michael加成反应,获得较好的产率(79%~88%)和较高的对映选择性(最高85% ee).     

手性磷酸催化的2-甲氧基呋喃与硝基苯乙烯的不对称Friedel—Crafts烷基化反应

以光学纯的联二萘酚为原料合成了一类手性磷酸催化剂,并用于催化2-甲氧基呋喃与硝基苯乙烯的不对称Friedel—Crafts烷基化反应中,最高得到了83％的产率和33％的对映体过量值．     

2-[3-(5-硝基苯并异噻唑)偶氮]-α-萘酚的合成、结构和性质研究

以 2－氰基－ 4－硝基苯胺为原料合成 3－氨基－ 5－硝基－ 2、 1－苯并异噻唑,并使之与α－萘酚偶联,得到 2－ [3－（ 5－硝基苯并异噻唑）偶氮 ]－α－萘酚（ 5－ NO2－ BPAN）;测定了其离解常数,并研究了它与金属离子的显色反应。     

(±)-1,1′-联-2-萘胺的简便合成方法

以β-萘胺或β-萘酚出发合成了(±)-1,1′-联-2-萘胺及其重要中间体2,2′-偶氮萘,方法简便.研究了影响产率的主要因素,给出了合适的反应条件.     

微波辐射固相合成外消旋1,1′-联-2-萘酚的改进

利用微波辐射,以FeCl3*6H2O为催化剂,使2-萘酚进行氧化偶联反应,合成外消旋1,1′-联-2-萘酚,反应时间2 min,产品产率98.5%,m.p.215～216 ℃.     

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