3-(4-羟基苯基)-2-羟甲基-8-甲氧基-1,4-苯并二氧六环-6-醛的合成

以3-甲氧基-4-羟基苯甲醛和对羟基苯甲醛为起始原料，分别经过溴代和水解两步反应制得3-甲氧基-4,5-二羟基苯甲醛；经过诺文葛耳反应、酯化、还原三步反应制得对羟基苯基丙烯醇.3-甲氧基-4，5-二羟基苯甲醛和对羟基苯基丙烯醇以氧化银为氧化剂，通过自由基仿生氧化偶联反应合成了目标化合物3-（4-羟基苯基）-2-羟甲基-8-甲氧基-1，4-苯并二氧六环-6-醛，其总收率为11．2％．以氧化银为氧化剂的自由基仿生氧化偶联反应为反应的关键步骤．     

3-(4-羟基苯基)-2-羟甲基-8-甲氧基1-,4-苯并二氧六环-8-醛的合成

以3-甲氧基-4-羟基苯甲醛和对羟基苯甲醛为起始原料,分别经过溴代和水解两步反应制得3-甲氧基-4,5-二羟基苯甲醛;经过诺文葛耳反应、酯化、还原三步反应制得对羟基苯基丙烯醇.3-甲氧基-4,5-二羟基苯甲醛和对羟基苯基丙烯醇以氧化银为氧化剂,通过自由基仿生氧化偶联反应合成了目标化合物3-(4-羟基苯基)-2-羟甲基-8-甲氧基-1,4-苯并二氧六环-6-醛,其总收率为11.2%.以氧化银为氧化剂的自由基仿生氧化偶联反应为反应的关键步骤.     

CaO（C）,La2O3／CaO（LC）和SrO—La2O3／CaO（SLC）催化剂上的？…

Ｃ，ＬＣ和ＳＬＣ催化剂上的甲烷氧化偶联及其相应的Ｃ２产物的催化氧化和它们的气相反应的研究结果表明：这些催化剂明显地抑制Ｃ２Ｈ４的氧化反应，其抑制能力由小到大按Ｃ，ＬＣ，ＳＬＣ顺序增加。而在甲烷氧化偶联反应中，Ｃ２产率和选择性同样按此顺序增加。这表明在甲烷氧化偶联反应中，催化剂Ｃ，ＬＣ，ＳＬＣ起着抑制Ｃ２Ｈ４产物深度氧化的作用。这一顺序也同ＣＯ２－ＴＰＤ表征的催化剂碱强度顺序一致。关联结果说明：这种     

5″-甲氧基-hydnocarpin的全合成

以2，4，6．三羟基苯乙酮和3，4-醛为起始原料，通过8步反应，完成了黄酮木脂素5″-甲氧基-hydnocarpin的全合成，其中I2氧化关环和Ag2O氧化偶联为关键步骤.     

CaO(C),La_2O_3/CaO(LC)和SrO-La_2O_3/CaO(SLC)催化剂上的甲烷氧化偶联V:催化剂对产物C_2烃氧化的抑制作用

Ｃ，ＬＣ和ＳＬＣ催化剂上的甲烷氧化偶联及其相应的Ｃ２产物的催化氧化和它们的气相反应的研究结果表明：这些催化剂明显地抑制Ｃ２Ｈ４的氧化反应，其抑制能力由小到大按Ｃ，ＬＣ，ＳＬＣ顺序增加．而在甲烷氧化偶联反应中，Ｃ２产率和选择性同样按此顺序增加．这表明在甲烷氧化偶联反应中，催化剂Ｃ，ＬＣ，ＳＬＣ起着抑制Ｃ２Ｈ４产物深度氧化的作用．这一顺序也同ＣＯ２ＴＰＤ表征的催化剂碱强度顺序一致．关联结果说明：这种抑制效应可能与催化剂的内在碱性有关．研究同时表明：在优化组成的ＳＬＣ催化剂上的甲烷氧化偶联反应中，Ｌａ２Ｏ３可能有利于·ＣＨ３自由基的产生；ＣａＯ有利于产物Ｃ２Ｈ６的氧化脱氢生成Ｃ２Ｈ４；而ＳｒＯ的引入则对最终产物Ｃ２Ｈ４的深度氧化起着抑制作用．     

3,5,3′,5′联苯四甲酸金属配合物合成与表征

以间苯二甲酸为原料经硝化、还原和重氮化-偶联反应合成目标化合物,并对硝化、还原和重氮化-偶联反应条件进行了优化.通过改变原料的配比和反应的温度、时间得到了各步反应的最佳反应条件和最佳比.间苯二甲酸经硝化、还原反应合成了5-氨基间苯二甲酸.再经重氮化-偶联反应合成目标化合物,总收率>63.2%(以间苯二甲酸计).另本文研究合成了目标产物的5种金属配合物.3,5,3′,5′-联苯四甲酸作为对称芳烃多元羧酸在高分子领域有着广泛的应用.     

3,5,3',5'联苯四甲酸金属配合物合成与表征

以间苯二甲酸为原料经硝化、还原和重氮化-偶联反应合成目标化合物,并对硝化、还原和重氮化-偶联反应条件进行了优化.通过改变原料的配比和反应的温度、时间得到了各步反应的最佳反应条件和最佳比.间苯二甲酸经硝化、还原反应合成了5-氨基间苯二甲酸.再经重氮化-偶联反应合成目标化合物,总收率＞63.2％(以间苯二甲酸计).另本文研究合成了目标产物的5种金属配合物.3,5,3 ',5’-联苯四甲酸作为对称芳烃多元羧酸在高分子领域有着广泛的应用.     

(±)-Lycorane关键中间体的合成研究

以DL-羟基脯氨酸为起始原料,经EDCl偶联、LiBH4还原、Dess-Martin氧化,Wittig反应和环氧化反应等步骤,合成得到构筑Lycorine型生物碱ABD环碳骨架的关键中间体7,总收率为40.1％.化合物7的结构经1H NMR和MS表征得到确认,为进一步开展Lycorine型生物碱的全合成新路线研究奠定了...     

新型二茂铁新木脂素类化合物的合成与表征

以芳香醛和丙二酸为原料,通过Knoevenagel反应、酯化反应、氧化偶联反应合成了苯并呋喃类新木脂素,苯并呋喃类新木脂素与二茂铁甲酸反应,首次合成了2种新型二茂铁基新木脂素化合物,其结构经1H NMR、MS、IR进行了表征.     

5"-甲氧基-hydnocarpin的全合成

以2,4,6-三羟基苯乙酮和3,4-二羟基苯甲醛为起始原料,通过8步反应,完成了黄酮木脂素5"-甲氧基-hydnocarpin的全合成,其中I2氧化关环和Ag2O氧化偶联为关键步骤.     

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.     

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.     

A computer generator for randomly layered structures

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

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。     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

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     

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

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An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.