吡啶

A series of α-(fluoro-substituted phenyl)pyridines have been synthesized by means of a palladium-catalyzed cross-coupling reaction between fluoro-substituted phenylboronic acid and 2-bromopyridine or its derivatives. The reactivities of the phenylboronic acids containing di- and tri-fluoro substituents with α-pyridyl bromide were investigated in different catalyst systems.

利用钯催化的SUZUKI偶联反应，以氟取代的苯硼酸与2-溴吡啶为原料合成了系列新的邻吡啶芳香化合物，研究了二及三氟取代的苯硼酸与溴代吡啶在不同催化体系中的反应性质。

Secondly,UV spectrophotometry was adopted to research the combination action on SM_2 and SIZ with MAA and 4-Vp.The combination action of functional monomer with template molecules were produced in the results. Then,the prediction imprinting principle of SM_2 and SIZ were given. The diagrams of infrared spectrum were analysed in MAA and 4-Vp and IMPs of SM_2. It was discoved that the absorbability peak of C=C function group in the IMPs were turn to be very low ,but the function group of carboxylic acid and pyridyl in the IMPs were no evidence change, and the condition was created in the molecular recognition of MIPs. Thermal Analysis was adopted to research IMPs ,in which ,a better thermal stability and its decompose temperature were showed in the results.

其次，本文利用紫外分光光度法研究磺胺二甲嘧啶和磺胺异噁唑与甲基丙烯酸或4-乙烯基吡啶的结合作用，结果表明，溶液中的功能单体与模板分子之间产生了结合作用，并预测磺胺二甲嘧啶和磺胺异噁唑印迹机理；分别分析了功能单体甲基丙烯酸、4-乙烯基吡啶、磺胺二甲嘧啶和磺胺异噁唑分子印迹聚合物的红外谱图，经过对比发现制得的印迹聚合物中C=C双键峰很小，并且功能键羧酸键和吡啶氮没有明显变化，这为聚合物特异识别特性创造了条件；利用综合热分析仪，对分子印迹聚合物进行综合热分析，结果表明分子印迹聚合物具有较好的热稳定性，分解温度也较高。

Four hemicyanine derivatives,-N-(4-sulfobutyl)-4-[2-(4-N,N-dimethylamino-phenyl) etheny1] pyridinium (P1),-N-(4-sulfobutyl)-4-[2-(4-N,N-dimethylaminophenyl)-1,3-buteny1] pyridinium (P2),-N-(4-sulfobutyl)-4-2-(4-N,N-dimethylaminophenyl) ethenyll quinolinium (Q1) and-N-(4-sulfobutyl)-4-

合成了具有不同共轭链长度的吡啶盐类及喹啉盐类半菁染料-N-（4-磺酸丁基）-4-[2-4-N，N-二甲基氨基苯基）乙烯基]吡啶鎓盐(P1、-N-（4-磺酸丁基）-4-[2-4-N，N-二甲基氨基苯基）丁二烯基]吡啶鎓盐(P2、-N-（4-磺酸丁基）-4-[2-(4-N，N-二甲基氨基苯基)乙烯基]哇琳鎓盐(Q1)以及-N-（4-磺酸丁基）-4-[2-4-N，N-二甲基氨基苯基丁二烯基]喹啉鎓盐(Q2)。研究了它们的光物理性质，并将它们用作TiO2纳米晶电极的光敏化剂引入光电化学电池。

The results showed that: the zinc powder could be used to reductively dechlorinate pentachloropyridine to tetrachloropyridine with its yield about 20%. Under the catalytic effect of silver, the dechlorination efficiency of pentachloropyridine was greatly improved.

实验结果表明：反应温度为60 ℃时，单一锌粉能够对五氯吡啶进行还原脱氯生成四氯吡啶，但是收率不高，只有20%左右，在银的催化作用下，四氯吡啶收率得到了很大提高。

But on the industry, many with the alkyl bandaging, such as bandaging , ergadebidi...

但是在工业上，多以烷基吡啶，如3-甲基吡啶、2-甲基-5-乙基吡啶以及喹啉等为原料制备烟酸。

The result showed that the pre pared doped polypyridine was irregular granule with 0.1~0.6 μm granularity. The electrochemical performance of H3PMo12O40 and polypyridine could be manifested. The product possessed definite thermostat-bility. Polypyridine was decompounded at temperature above 511℃.

结果表明，制备的掺杂态聚吡啶形貌为0.1~0.6μm的不规则颗粒，能表现出杂多酸和掺杂态聚吡啶的电化学行为，并具有一定的热稳定性，聚吡啶在511℃以上分解失重。

Nim was rapidly metabolized and three metabolites of Nim were isolated and identified in human liver microsomes. These are dehydrogenated metabolite of dihydropyridine ring of Nim (M1), demethylated metabolite of lateral chain of dihydropyridine ring of Nim (M2) and the dehydrogenated and demethylated metabolite of Nim (M3), respectively.

Nim在人肝微粒体内被迅速代谢成3个代谢物，分别是Nim二氢吡啶环脱氢代谢物M1，二氢吡啶环侧链脱甲基代谢物M2，二氢吡啶环脱氢及其侧链脱甲基代谢物M3。

Advances on the development of new oxidation reagents and methodologies and their applications in both target-and diversity-oriented synthesis have been regularly surveyed and constituted one of the most extensively and actively investigated areas of current organic synthesis.1 In this context,a plethora of oxidants,including those small organic molecule-based reagents (such as Dess-Martin periodinane,Swern oxidation,Moffatt oxida- tion,Corey-Kim oxidation,and 三氧化硫/pyridine)and metal-based systems(such as Jones reagent,Collins reagent,pyridinium chlorochromate,pyridinium dichromate,barium permanganate, manganese dioxide,ruthenium tetroxide,silver carbonate,and Oppenauer oxidation),have been identified to be powerful tools promoting conversion of various alcohols into their corresponding aldehyde or ketone products and thus evolved as a most important class of tools in synthetic chemists'arsenal.

关于新的氧化试剂和方法，在两个目标和多样性为导向的发展及其应用合成的进步定期调查，构成一个最广泛，积极探讨在这方面，过多的地区目前有机合成。1氧化剂，包括有机小分子为基础的试剂（如Dess - Martin氧化剂，斯文氧化反应，氧化法特，科里，金氧化，三氧化硫/吡啶）和金属为基础的系统（如琼斯试剂，柯林斯试剂，吡啶氯铬，吡啶铬，钡锰，二氧化锰，四氧化钌，银碳酸盐和开瓶器氧化），已被证实为推动中相应的醛或酮醇转化的各种产品，功能强大的工具，因而作为一个最重要的阶级演变在阿森纳的工具合成化学家。

E . ratio of resin column to its diameter , flow rate of the diesel fuel samples on adsorption , and the effects of composition , flow rate of the eluant on desorption were studied . The suitable methods were also established about extraction , elution and regeneration in the resin column.

树脂吸附碱性氮吡啶的动力学和热力学研究表明：温度在288.15K～298.15K之间，树脂对吡啶的吸附过程动力学机理模型为缩核模型，吡啶溶液质量浓度为50mg/L时，主要受液膜扩散的控制，其有效扩散系数为K_f

The paper applied the quantum chemistry methods and systematically studied the following 4 systems:(1) poly(alkylthiophene-co-pyridine)s;(2) carbazolyl-pyridinyl alternating copolymers;(3) 2,7- linked and 3,6-linked carbazole trimers (4) phenol-pyridyl boron complexes.

本文用量子化学方法系统研究了如下4个体系：(1)系列噻吩和吡啶共聚物；(2)咔唑和吡啶交替聚合物；(3) 2，7-咔唑和3，6-咔唑三聚物；(4)苯酚-吡啶硼配合物。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。