含开链冠醚基二芳醛缩4-烯丙基-3-硫代氨基脲的合成

由含开链冠醚基的二芳醛与4-烯丙基-3-硫代氨基脲缩合,合成三种含硫schiff碱型开链冠醚类配体,并初步研究了其与一些金属离子的配位性能。     

一系列苯并-15-冠-5冠醚化酰腙衍生物的合成及结构表征

以乙醇为溶剂,4′-乙酰基苯并-15-冠-5和酰肼为反应物,在回流条件下合成了八个新型冠醚化的酰腙,采用红外、核磁、元素分析对所合成的目标化合物进行了表征,确定了结构。探讨了电子效应对反应产率的影响,并对该类化合物1HNMR图谱中R-CH_2CONHN=基团中CH_2和NH质子峰的出峰情况进行了初步分析。     

3-甲基茚满酮-[1]-5,6-苯并-15-冠-5的合成

以多聚磷酸(PPA)为催化剂和反应溶剂,将冠醚进行酰化,合成了3-甲基茚酮-[1]-5,6-苯并-15-冠-5.合成产物由IR,MS和元素分析鉴定了结构.     

4-甲氧基-β-苯乙胺的合成研究

以4-甲氧基苯甲醛和硝基甲烷为原料，经缩合和锌粉、盐酸还原合成4-甲氧基-β-苯乙胺，4-甲氧基-β-硝基苯乙烯合成收率达81．2％，4-甲氧基-β-苯乙胺合成收率达82．8％，两步反应总收率67％。     

5,6,7,8-四氢-2-萘酚的合成研究

以2-萘酚为原料，用RaneyNi做催化剂，在较小的压力下反应合成5，6，7，8-四氢-2-萘酚，收率稳定，在68％以上。     

Hg(Ⅱ)与冠醚配位化合物的合成

冠醚化合物具有特殊的配位能力，其研究和应用范围不断扩大，在环境保护和环境医学（如解汞毒药物合成等）等方面的研究已引起重视。冠醚较难配位过渡金属离子，本文讨论除汞的新方法，成功合成了冠醚与氯化汞的配合物，其结构和组成由红外光谱、元素分析等结果所证实，对于进一步弄清冠醚化合物的特性及应用具有一定的意义。     

2-羟基-5-(4-磺酸基偶氮苯)-苯甲酸乙脂的合成

有机非线性光学材料的研究集中在有推拉电子结构(D-π-A)和分子内电荷转移的有机化合物，有机物的非线性光学效率应主要来自非定域的π电子，与无机非线性光学材料相比．具有较高的非线性系数和具有可设计、合成使材料多样化等诸多特点，偶氮化合物具有优良的光电性能。是一类很好的非线性光学生色基团．设计合成了具有D-π-A结构的偶氮化合物2-羟基5-(4-磺酸基偶氮苯)-苯甲酸乙脂。     

6-甲氧基-7-苄氧基喹唑啉-4-酮的合成

以廉价易得的香兰素为起始原料,通过苄基化、硝化、氧化、还原以及合环五个步骤合成了具有抗肿瘤活性的药物中间体6-甲氧基-7-苄氧基喹唑啉-4-酮.讨论了合成试剂的用量、反应温度、反应时间等因素对实验结果的影响.     

3-羟基-2-噻吩甲酸甲酯的合成

本文对以巯基乙酸和丙烯酸甲酯为主要原料合成3-羟基-2-噻吩甲酸甲酯的方法进行了研究.该方法具有合成简单,易于操作,产品收率高的优点.     

2-羟基-1-萘甲醛缩氨基硫脲及其金属配合物的合成表征

合成2-羟基-1-萘甲醛缩氨基硫脲（HL）及其与（CH3COO）2Cu·H2O、Zn（CH3COO）2·H2O的配合物，通过核磁共振氢谱、红外光谱对配体和配合物进行了表征，并对席夫碱及其配合物的合成条件加以优选得出最佳的反应条件。     

原位一步法合成3，5-二硝基水杨酸插层水滑石

采用原位一步合成法合成3，5-二硝基水杨酸插层水滑石材料，用XRD、IR对合成的样品进行表征，并与水溶液中阴离子直接交换合成法进行比较。结果表明，采用上述两种方法在控制适当的反应条件下均能制备出相应的3，5-二硝基水杨酸插层水滑石，但相比之下，原位一步合成法明显具有合成时间短，步骤简单和节约能耗等优点。     

Molecule matters

Ever since its isolation in 1820, Quinine has played a crucial role in the development of organic chemistry, chemical industry and modern medicine. The total synthesis of quinine, widely regarded as an event of epochal importance was claimed by Woodward and Doering in 1945. This work, however, heavily relied on unsubstantiated literature reports and it appears that Woodward’s work fell short of a total synthesis of quinine. The first stereoselective total synthesis of quinine was accomplished only in 2001, by Stork, who incidentally is the originator of the concept of stereoselectivity in total synthesis. Naturally, this work has been attested as a landmark in organic synthesis by leaders in the field.     

Molecule matters The Quinine story: A 100-year saga

Ever since its isolation in 1820, Quinine has played a crucial role in the development of organic chemistry, chemical industry and modern medicine. The total synthesis of quinine, widely regarded as anevent of epochal importancewas claimed by Woodward and Doering in 1945. This work, however, heavily relied on unsubstantiated literature reports and it appears that Woodward’s work fell short of a total synthesis of quinine. The first stereoselective total synthesis of quinine was accomplished only in 2001, by Stork, who incidentally is the originator of the concept of stereoselectivity in total synthesis. Naturally, this work has been attested as a landmark in organic synthesis by leaders in the field.     

N~1,N~5-二(1-甲基咪唑-2-酰基)二乙基三胺的合成与表征

文章首次报道了一种含咪唑环多胺类化合物N1,N5-二(1-甲基咪唑-2-酰基)二乙基三胺的合成方法,以此化合物为基础,可以合成对称平行的发卡式多酰胺分子,以期对DNA序列进行新的特异性识别,从而开发研制新型有效的工具酶或抗癌药物。合成方法简便易行、耗时短、不需要过柱分离,每一步合成都有较高的产率。     

N1,N5-二（1-甲基咪唑-2-酰基）二乙基三胺的合成与表征

文章首次报道了一种含咪唑环多胺类化合物N1,N5-二（1-甲基咪唑-2-酰基）二乙基三胺的合成方法,以此化合物为基础,可以合成对称平行的发卡式多酰胺分子,以期对DNA序列进行新的特异性识别,从而开发研制新型有效的工具酶或抗癌药物。合成方法简便易行、耗时短、不需要过柱分离,每一步合成都有较高的产率。     

Solvothermal synthesis of nanosized CoSb3 skutterudite

Nanostructures enhance phonon scattering and improve the figure of merit of thermoelectric materials. Nanosized CoSb3 skutterudite was synthesized by solvothermal methods using CoCl2 and SbCl3 as the precursors. A "two-step" model was suggested for the formation of CoSb3 based on the X-ray diffraction analysis. The first step is the formation of cobalt diantimonide in the earlier stage during the synthesis process. Diantimonide was then combined with antimony atoms to form the skutterudite structured triantimonide, CoSb3, in the later stage of the synthesis process as the second step. The synthesized CoSb3 powders consist of irregular particles with sizes of about 20 nm and sheets of about 80 nm.     

Solvothermal synthesis of nanosized CoSb_3 skutterudite

Nanostructures enhance phonon scattering and improve the figure of merit of thermoelectric materials. Nanosized CoSb3 skutterudite was synthesized by solvothermal methods using CoCl2 and SbCl3 as the precursors. A "two-step" model was suggested for the formation of CoSb3 based on the X-ray diffraction analysis. The first step is the formation of cobalt diantimonide in the earlier stage during the synthesis process. Diantimonide was then combined with antimony atoms to form the skutterudite structured triantimonide, CoSb3, in the later stage of the synthesis process as the second step. The synthesized CoSb3 powders consist of irregular particles with sizes of about 20 nm and sheets of about 80nm.     

合成甲醇催化剂的发展综述

介绍了甲醇合成催化剂由最初的含铬催化剂，经铜基催化剂，发展到现在非铜基催化剂的发展过程．其中铜基催化剂在甲醇合成中占有主导地位，并从活性位和添加助剂钾和锆三方面做了详细的说明．     

Using texture synthesis in fractal pattern design

INTRODUCTIONIn the last two decades, research on fractal ge-ometry has received much attention for its theoretical significance and practical applications. Pattern design based on fractal geometry is an important application area of fractal techniques in the textile industry (Wang, 2003). Computer aided pattern design involves the de-sign of textures and colors in the pattern. The source of textures is rich. All kinds of objects and scenery including man-made abstract objects can be used…     

Recall of Key Words as a Function of Bloom's Cognitive Level

Two experiments were designed to pursue the levels of processing analysis of Bloom's taxonomy of the cognitive domain proposed by Kunen, Cohen & Solman (1981). In the first experiment four groups of students processed 20 principles at the levels of knowledge, application, synthesis and evaluation respectively. The times required by students in the first two of these groups were significantly shorter than the times required by the last two groups, but in conrast to the Kunen et al. study, no mathematical problems were included to correct for these differences. The percentages of correctly recalled principle names showed the same pattern of differences as previously obtained by Kunen et al. for their Australian sample and it was concluded that the interpolated problems used by these authors had not interfered with performance. However, since the levels of performance did not differ for application and synthesis (although they were superior to the levels obtained for knowledge and evaluation), the results did not unambiguously indicate that synthesis should occupy the pinnacle of the hierarchy. It was suggested, therefore, that a precise ordering of the taxonomic levels required further investigation including all six categories. Also, observation of the questions used for the knowledge category, suggested that the recall scores obtained at this level were an underestimate of incidental memory, and, as a consequence, these questions were revised for use in Experiment 2. The results of Experiment 2 showed that the revised knowledge questions improved recall and the actual level of performance did not differ significantly from the levels obtained for comprehension, synthesis and evaluation. The percentage of recalled words obtained in the synthesis category was, however, observably superior to all other levels and this was consistent with the similar Kunen et al. finding. However, since the results of both of the present experiments failed to support a hierarchical arrangement of the taxonomic levels, it was suggested that the Kunen et al. results should be interpreted with caution.