重氮化

A series of diazonium salts of 4-(N-methyl-N-phenylamino)-3-amino-1,8-naphthalic anhydride 5a, its naphthalimide derivative 5b, and 5e were designed and synthesized,and it was the first time to discover that aromatic radical-induced intramolecular aromatic 1, 5-hydrogen transfer was also involved in the nitrogen-contianed system during Pschorr cyclization.

实验设计合成了4--3-氨基-1，8-萘酐的重氮盐5a、其衍生物N-丁基-4--3-氨基-1，8-萘酰亚胺的重氮盐5b和N--4--3-氨基-1，8-萘酰亚胺的重氮盐5c，并首次发现了通过普朔尔环化反应以氮甲基化的氮为桥原子的体系存在着芳香自由基诱导的芳香1，5-氢转移。

In order to develop a fast ELISA detection kit, clenbuterol was diazotized firstly and then coupled to bovine serum albumin and ovalbumin to synthesis immunogen and coating antigen respectively.

首先，重氮化的 CL 分别与牛血清白蛋白(bovine serum albumin， BSA)和卵清白蛋白(ovalbumin， OVA)交联，制备成免疫抗原 CL-BSA 和包被抗原 CL-OVA。

In the sensitive and simple method, the p-phenylenediamine dihydrochloride was oxided to diazotized products with the reaction of NaNO2 in H2SO4 medium.

色氨酸与重氮化的对苯二胺二盐酸盐在硫酸介质中生成粉红色化合物，该化合物最大吸光值为522nm；摩尔吸光系数为0.89×104L/mol·cm；偶合产物至少稳定存在1h；色氨酸浓度在0.30～12μg/ml范围内遵循朗伯比尔定律。

It is shown that the optimal conditions for the reaction of CADB with SESA are pH 12.0 and m:m=6:1.The product p-aminobenzart sulfanily ethyl CADBwas diazotized and linked with lipase.The optimal pH for lipase linked to diao-compound is 7.5.The link time is at last 12h.

试验结果表明：CADB与SESA反应的最适条件是pH＝12.0，SESA与CADB质量比为6：1，反应生成的对氨基苯磺酰乙基交联烯丙基葡聚糖凝胶经重氮化后与脂肪酶偶联的最适条件是pH7.5，偶联时间≥12h。

Methylimidazole in soy sauce was extracted with methylene chloride,diazotized to forms a red colored azo-compound with the highly absorbance at the wave length of 440nm and determined by ultraviolet-visible spectrometry.

酱油样品在层析柱中用二氯甲烷洗脱，经重氮化后在波长440nm处具有最大吸收，据此建立了紫外可见光谱法测定酱油中4-甲基咪唑的方法。

A new convenient synthesis of a series of 1-aryl-2-propanones using aromatic amine s as precursors, via diazo reaction and improved Meerwein arylation reaction under mild conditions, was achieved.

以芳香胺为原料，经重氮化和改进的Meerwein芳基取代反应，合成了一系列的1-芳基-2-丙酮，其中1-(3，5-二三氟甲基苯基)-2-丙酮是一个新化合物。

A new convenient synthesis of a series of 1-aryl-2-propanones using aromatic amines as precursors, via diazo reaction and improved Meerwein arylation reaction under mild conditions, was achieved. In addition, 1-[3,5-bisphenyl]-2-propanone is a new compound among the synthesized compounds. This approach is an efficient synthetic method for the aryl-propanones with the different substituting groups.

以芳香胺为原料，经重氮化和改进的Meerwein芳基取代反应，合成了一系列的1-芳基－2-丙酮，其中1-（3，5-二三氟甲基苯基）2-丙酮是一个新化合物改进后的方法简化了合成步骤，提高了收率，可方便地用于在苯环上具有不同取代基的芳基丙酮的合成。

To dye the different types of fibers by the same dye, universal dyes based on naphthalene ring system are prepared by the diazo coupling reaction of 7-acetamide-4-hydroxy-2-oaphtialene-β-(N,N-dimethylaminoethyl)solfonamide and m-aminobenzene-β-hydroxyethyl sulfone sulfunate.

为了实现用同一支染料对不同类型的纤维进行染色的目的，通过间氨基苯基－β-羟乙基砜硫酸酯与7-乙酰氨基－4-羟基－2-萘－β磺酰胺的重氮化偶合反应合成了含萘环的通用染料，其结构通过质谱分析进行了表征。

Improved yield and selectivity are observed while applying this technology on diazo- coupling reactions.

该技术在重氮化、偶合反应中的应用，取得了高于常规反应器的收率和纯度。

Add 100-150g of finely crushed ice and stir until the m-nitroaniline has been converted into the sulphate and a homogeneous paste results. Cool to 0-5°C by immersion of the beaker in a freezing mixture, stir mechanically and add a cold solution of 18g(0.26mol) of sodium nitrite in 40 ml of water over a period of 10 minutes until a permanent colour is immediately given to potassium iodide-starch paper: do not allow the temperature to rise above 5-7°C during the diazotisation.

加入100-150g碎冰，搅拌至m-硝基苯胺成硫酸盐，把烧杯浸入到冷冻液中冷却到0-5°C，机械搅拌下于 10 min内加亚硝酸钠冷溶液（由18g(0.26mol)亚硝酸钠和40 ml 水组成），直到用淀粉-碘化钾试纸测试时，能使该试纸立即显色且不褪色：在重氮化反应时不允许温度超过5-7°C。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。