6-芳基取代吡唑并[1,5-a]嘧啶的合成

吡唑并[1,5-a]嘧啶类化合物是一类具有良好生物活性的含氮杂环化合物.以2,4-二氯苯乙腈和对三氟甲基苯甲酸甲酯为起始原料分别制备了5-氨基-4-(2,4-二氯苯基)-3-甲基-1H-吡唑(3)和5-氨基-3-(4-三氟甲基苯基)-1H-吡唑(6).然后,在三丁胺为溶剂160℃条件下,上述5-氨基-4-(2,4-二氯苯基)-3-甲基-1H-吡唑和5-氨基-3-(4-三氟甲基苯基)-1H-吡唑分别与苯基丙二酸二乙酯类化合物反应得到3个6-芳基吡唑并[1,5-a]嘧啶类化合物(8a-c).并通过红外光谱与核磁共振氢谱确定目标化合物的结构.     

5-芳基-7-三氟甲基吡唑并[1,5-a]嘧啶类化合物的合成

吡唑并[1,5-a]嘧啶类化合物与嘌呤结构非常类似.大量研究表明这类化合物具有广泛的生物活性及药理活性.实验合成了三个7-三氟甲基-5-芳基吡唑并[1,5-a]嘧啶类化合物(5a,5b和7).乙氧基甲叉基氰乙酸乙酯(1)与水合肼在乙醇中回流反应制备了中间体5-氨基-1H-吡唑-4-羧酸乙酯(2);取代苯乙酮(3)与三氟乙酸乙酯缩合反应得到1-取代苯基-4,4,4-三氟丁二酮(4);然后,化合物2与化合物4在乙酸回流条件下反应得到5-(4-取代苯基)-7-三氟甲基吡唑并[1,5-a]嘧啶-3-羧酸乙酯(5a,5b),5a经过NBS溴代、最后溴代中间体与吗啉反应制备目标产物7.其结构经核磁共振氢谱和红外光谱进行了表征.     

N-芳基-4-碘吡唑与芳基二硫醚的偶联反应

1-(2,6-二氯-4-三氟甲基苯基)-3-氰基-5-氨基吡唑经碘代反应合成4-碘-1-(2,6-二氯-4-三氟甲基苯基)-3-氰基-5-氨基吡唑(N-芳基-4-碘吡唑).以N,N'-二甲基乙二胺为配体,在CuI催化下,N-芳基-4-碘吡唑与芳基二硫醚偶联反应,制备了N-芳基-4-芳硫基吡唑,产率75%-82%.最后通过1H NMR、13C NMR、IR、MS对产物结构进行了表征.     

新型吡唑并[3,4-b][1,5]苯二氮杂衍生物的合成

以5-氨基-1-芳基-1H-吡唑-4-甲腈为原料,在氢氧化锂催化下与邻氯硝基苯反应制得1-取代苯基-4-氰基-5-(2-硝基苯氨基)-1H-吡唑,然后经硝基还原和环合制得1-芳基-4-氨基-1,10-二氢吡唑并[3,4-b][1,5]苯二氮,最后与N-甲基哌嗪反应制得两个结构新颖的1-芳基-4-(4-甲基-1-哌嗪基)-1,10-二氢吡唑并[3,4-b][1,5]苯二氮杂衍生物.该合成方法操作简单,条件温和,收率较高.目标化合物结构经红外光谱、核磁共振氢谱和元素分析法表征.     

3(5)-(4-甲氧基苯基)-1H-5(3)-取代吡唑酰胺化合物的合成及其结构表征

以4-甲氧基苯乙酮和草酸二乙酯为起始原料,通过Claisen酯缩合、Knorr环化得到3(5)-(4-甲氧基苯基)-1H-5(3)-吡唑甲酸乙酯,再与水合肼反应得到3(5)-(4-甲氧基苯基)-1H-5(3)-吡唑酰肼,进一步与芳香缩合,高产率合成出10个新的3(5)-(4-甲氧基苯基)-1H-5(3)-取代吡唑酰腙化合物,通过元素分析、红外光谱、核磁共振氢谱等测试手段对所合成的10个新化合物进行了结构表征.     

新型含联苯基的多氟代吡唑衍生物的合成及Aurora激酶A抑制活性测试

结构多样性和生物活性多样性的吡唑类衍生物成为药物研究的一类重要化合物.该文以2,4-二氟联苯为原料,经傅-克酰基化、缩合、环化等反应步骤,合成了新型含联苯基的多氟代吡唑衍生物4a ～ 4f ,其结构用红外光谱(IR)、高分辨质谱(HRMS-ESI)、核磁共振氢谱(1H NMR)、核磁共振碳谱(13C NMR)进行了表征.测试了目标化合物对Aurora激酶A的抑制活性,初步的测试结果表明,目标化合物对Aurora 激酶A的抑制活性较弱.     

1,3-二苯基-5-(4-氯苯基)-2-吡唑啉的合成

以对氯苯甲醛为起始原料，经过两步缩舍反应合成了有机荧光染料1，3-二苯基-5-(4-氯苯基)-2-吡唑啉，对氯苯甲醛溶于无水乙醇，在NaOH催化下与苯乙酮缩合，生成苯基-(4-氯苯)乙烯酮(1)，n(对-氯苯甲醛)(Ⅰ)：n(苯乙酮)=0．75：1，产率70％．将(Ⅰ)和苯肼溶于乙二醇独乙醇中，在室温下反应3h，环化缩合为最终产物1，3-二苯基-5-(4-氯苯基)-2-吡唑啉(Ⅱ)，产率80％，产物结构经红外光谱，核磁共振谱，元素分析及荧光光谱证实。     

三组分高效合成吡唑并[3,4-b]吡啶衍生物

以氨基吡唑、芳酮醛水合物和丙二腈为原料,醋酸为溶剂,在100℃微波辐射下高效制备一系列吡唑并[3,4-b]吡啶衍生物。此制备方式具有反应快(反应时间为20~30 min)、操作简单、选择性高和环境友好等优点。产物的结构可通过高分辨质谱、红外光谱、核磁共振氢谱和碳谱进行表征;其中化合物6-氨基-4-(4-氯苯甲酰基)-1,3-二甲基-1H-吡唑[3,4-b]吡啶-5-腈4a的结构经由X射线单晶衍射进一步确认。     

在线红外对1-苯基-5-(4-氟苯基)-3-羟基吡唑合成反应进程的研究

1-苯基-5-(4-氟苯基)-3-羟基吡唑化合物是一种活性药物中间体,经测试具有一定的杀虫杀菌活性。可由1-苯基-5-(4-氟苯基)-3-吡唑烷酮在FeCl3的催化下,由空气中的O2氧化得到,反应进行20h基本完成。利用在线反应红外光谱对该氧化反应进程进行研究,得到一系列特征官能团吸收峰随反应进程变化的谱图。通过分析官能团特征吸收峰随时间的变化情况,初步了解了此类反应的机理和进程,并且证明了该产物在溶剂中还存在酮式异构体的结构。     

苯基吡唑缩单胺类席夫碱衍生物的合成和电化学、光物理性能

为寻找更好的苯基吡唑类席夫碱衍生物的发光材料,以苯基吡唑为结构母体设计合成了6种苯基吡唑缩单胺类席夫碱系列衍生物.通过IR,~1H NMR,MS和元素分析等对这6种目标产物进行了表征,其中1-(2,6-二氯-4-三氟甲基-苯基)-5-[(2-羟基亚苄基)-氨基]-1H-吡唑-3-甲腈,即APY(PhOH)的结构进一步通过单晶衍射确证,并测试了其紫外、荧光光谱,探讨了其电化学性质和光物理性能.结果表明:6种苯基吡唑缩单胺类席夫碱衍生物的结构与设计相符,具有有效的共轭结构与发光效能,是良好的发光材料,为设计合成具有优良发光性能的共轭型有机发光材料奠定基础.     

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.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

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.     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to