查询词典 pyridine

Cinnamic acid was synthesized from benzaldehyde and malonic acid by Knoevenagel reaction with pyridine as catalyst.

以苯甲醛和丙二酸为原料，吡啶为催化剂，利用 Knoevenagel 反应合成肉桂酸，从而降低了反应温度，提高了收率和产物纯度，简化了合成工艺。

The first part is to synthesize 5-formyl -8- quinolinol from 8-uinolinol and chloroform , using ethanol as a solvent. Then analysizing the 5-formyl-8-quinolinol by IR. The second part is , according to ideas of molecule designing, to synthesize the new self-assembly Inorganic-Organic coordination polymers Co(u2-bpyV2O6,(C4H4N2)Ni2(H2O)2-V4Ol2,(Cl2Hl2N2)Co-V2O6 using Cu, Ni, and Co as templating, 4-cyano-pyridine(4-CNPy), 4,4-bipyridine,pyrazine, l,2-bis(4-pyridyl)ethane, 5-formyl -8- quinolinol as building blocks and Ammonium Metavanadate (NH4VO3) as subordinate building blocks by Hydrothermal , analysizing their content of element determining their structures by X-Ray diffraction.

本课题实验分为两部分：一是配体的合成，以8-羟基喹啉、三氯甲烷为原料，以乙醇为溶剂，合成了5—甲醛基—8羟基喹啉并且对其进行了IR的分析测定；二是配位聚合物的合成，通过分子设计，采用溶剂热法以Cu、Ni、Co为中心离子，以5—甲醛基—8羟基喹啉、4，4-联吡啶、吡嗪、1，2-二吡啶基乙烷为配体，以偏钒酸根(VO_3~-)为辅助配体，通过水热法自组装合成了新的3-D网状结构配位聚合物Co(μ_2-bpy)V_2O_6，(C_4H_4N_2)Ni_2(H_2O)_2·V_4O_(12)，C_(12H_(12)N_2Co·V_2O_6，并对其进行了元素分析和晶体结构的测定。

Macrocycle with one pyridyl unit and one aryl oxdiazole unitCondensation of Ts-amino acids with 2,6-bishydroxymethyl pyridinegave di-esters in the presence of DCC and TsOH in pyridine. DMAP,another acylation catalyst was also discussed in our esterification.

二。含一个吡啶环和一个二苯基噁二唑单元：直接采用Ts保护的氨基酸与吡啶二醇在吡啶-TsOH反应体系中，在DCC作用下生成吡啶二醇二酯，讨论了酯化过程中不同酰基化试剂的应用。

The results showed that the block copolymer was composed of repeating units of oxyethylene and 2-vinyl pyridine, and linked with oxymethylene group.

某些条件下凝胶的生成影响反应的顺利进行，讨论了凝胶生成的影响因素。

In this research, two novel compounds in which alkylenedithiomethylene Malonic acid act as the main coordination agents and the compounds containing N atom (such as pyridine, Phenanthroline Ethanediamine and 4,4'-Bipyridinyl) act as the associating coordination agents have been synthesized by the means of solution and solid-liquid diffusing reactions. 9 coordination complexes and polymers have been designed and synthesized in which the transition metals Cu and Zn acted as the centre ions. These compounds have been characterized by X-ray single crystal diffraction analysis, and some properties of them have been tested and analyzed.

本论文设计合成了两种结构新颖的含有二硫缩烯酮结构的丙二酸类化合物，以此为主要配体，以含氮化合物(吡啶、邻菲罗啉、乙二胺和4，4'-联吡啶)为辅助配体，采用常规溶液合成和固-液相扩散等方法，设计合成了9个过渡金属Cu和Zn离子配合物和配位聚合物，采用单晶X-射线衍射等技术对晶体结构表征，并对其部分性质进行了测试和分析。

A synthetic method for N-(5-nitro-6-chloro-3-pyridine methyl) phthalimide is studied.

研究了N-（5-硝基－6-氯－3-吡啶甲基）邻苯二甲酰亚胺的合成方法。

Then, N-(5-nitro-6-chloro-3-pyridinemethyl) phthalimide is obtained after the nitrating reaction of N-(6-chloro-3-pyridine methyl) phthalimide. The yield of the obtained product is 90.5%, and its melting point is 143.1~143.8℃.

缩合产物再经过硝化，合成N-（5-硝基－6-氯－3-吡啶甲基）邻苯二甲酰亚胺，其熔点为143.1~143.8℃，收率为90.5%。

Mainly engaged in sodium azide, barium azide, three phosphorus nitride Friday, phenyl isothiocyanate, 1 - phenyl -5 - mercapto-tetrazole, 4 - dimethylamino-pyridine, 2 - mercapto--5 -- methyl-1,3,4 thiadiazole, N-hydroxy phthalimide, anhydrous betaine and betaine hydrochloride, such as fine chemical raw materials and medicine, pesticide intermediates of the development, production and sales.

主要从事叠氮化钠，叠氮化钡，五氮化三磷，异硫氰酸苯酯，1-苯基-5-巯基四氮唑，4-二甲氨基吡啶，2-巯基-5-甲基-1，3，4噻二唑，N-羟基邻苯二甲酰亚胺，无水甜菜碱及甜菜碱盐酸盐等精细化工原料及医药、农药中间体的开发、生产和销售。

In chatpter three the mechanism of the gold-catalyzed cycloisomerization of propargylic pyridine was reported.

论文第三章将报道金催化的炔丙基吡啶衍生物的环异构化反应的机理研究结果。

Pure phase FER zeolite and siliceous FER zeolite have been synthesized in the systems of tetramethyl ethylene diamine- Na2O- SiO2 - Al2O3 - H2O, Na2O - K2O - Al2O3 - SiO2 - H2O -HCO3-- CO32-, and pyridine - propylamine- HF- SiO2 - H2O respectively.

在TMEDA-Na2O-SiO2-Al2O3-H2O体系，Na2O-K2O-Al2O3-SiO2-H2O-HCO3--CO32-体系及Py-PrNH2-HF-SiO2-H2O体系中，分别合成了纯相FER沸石及FER硅沸石。

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。