重氮化

The paper discloses a process for diazotization fluorination of aromatic primary amines utilizing sodium nitrite and anhydrous hydrofluoride to produce the corresponding diazonium fluoride which is decomposed, usually by heat, to make the desired fluoroaromatics .

本文通过重氮化工艺路线的改进，在液态氟化氢中进行重氮化和重氮盐的热分解，提高了芳香族氟化物的收率，并且使重氮化反应工艺能应用于工业化生产。

The diazotization and hydrolysis process was used to synthesize high-purity m-cresol using m-toluidine as the main material.

间甲酚是一种重要的精细化工中间体，以间甲苯胺为原料，采用重氮化-水解法制备高纯度间甲酚，通过正交实验和单因素实验对重氮化反应工艺条件进行了优化。

The diazotization condition of 4-methyl-1-ethyl-3-cyano-5amino-6-hydroxy-2-pyridone and coupling condition of its diazo salt were researched, and the structure of its diazo salt was confirmed.

研究了4-甲基-1-乙基-3-氰基-5-氨基-6-羟基-2-吡啶酮的重氮化反应及其重氮盐发生偶合反应的条件，确定了重氮盐的结构。

The appropriate temperature of diazotization was-10～-5℃,and the diazotizating fluoborate was decomposed in petroleum ether to get 2-chloro-3-fluoropyridine with 64% yield.

以2-氯-3-氨基吡啶为原料，在40%的氟硼酸溶液中，采用饱和的亚硝酸钠为重氮化剂，在-10~-5℃下进行重氮化反应制得重氮盐，在石油醚中热分解得到2-氯-3-氟吡啶，收率为64%。

Syntheses of Curing Agent Modified Dicyandiamide by m-Toluidine;2. The diazotization and hydrolysis process was used to synthesize high-purity m-cresol using m-toluidine as the main material.

间甲酚是一种重要的精细化工中间体，以间甲苯胺为原料，采用重氮化-水解法制备高纯度间甲酚，通过正交实验和单因素实验对重氮化反应工艺条件进行了优化。

After sodium bisulfite reacted with methanal at 60-65℃ for 0.5h, aniline was dripped into the system to synthesize phenylaminomethyl-sodium sulfonate subsequently, the diazol solution of p-nitroaniline was dripped into phenylaminomethyl-sodium sulfonate synthesized to form 4'-nitro-4-aminoazobenzene. The compound was then added into diazol solution of p-chloroaniline to obtain the object product, which was identified by IR spectrum and element analysis.

在60~65℃温度下，亚硫酸氢钠与甲醛反应半小时之后滴入苯胺生成苯胺基甲基磺酸钠，另将硝基苯胺重氮化得到重氮盐溶液滴入苯胺基甲基磺酸钠中得到4'-硝基-4-氮基偶氮苯，然后将其滴入氯苯胺重氮化后的重氮盐溶液中，得经红外光谱检验和元素分析证实的目标产物。

It also classifies them in accordance with the compound method of triazene reagents as follows: reagents diazotizated with sodium nitrite and muriatic acid, reagents diazotizated with nitrosyl positive ion, reagents diazotizated with n-butyrate nitrite.These reagents with high sensitivity and good choice have been widely applied to the determination of microa mounts of cadmium and...

按三氮烯类试剂合成的方法进行分类，分别为在亚硝酸钠和盐酸作用下重氮化的试剂，在亚硝酰正离子作用下重氮化的试剂，在亚硝酸正丁脂作用下重氮化的试剂，此类试剂灵敏度高，选择性好，广泛应用于被镉、汞等过渡金属离子污染的环境样品的分析中。

In the third part of this paper, a facile method is presented for synthesis of malonaldehyde dianil from propargyl alcohol by oxidizing using chromium trioxide and addition reaction with aniline.

对肼基苯磺酸是由对氨基苯磺酸经亚硝酸钠重氮化得到的重氮盐用亚硫酸氢钠还原、水解、硫酸酸化制得，本文经多次实验确定了反应原料、用量及反应条件，得到的产品纯度好，产率高。

Xinquan HuTwo new chiral backbones R-- and S--2-amino-2"-hydroxy-4,4",6,6"-tetra methyl-1,1"-biphenyl were synthesized via nitration, diazotation/iodination, Ulhnann coupling, selective reduction, diazotation/hydrolysis, hydrogenation and resolution from 2,4-dimethyl-aniline in seven steps.

以2，4-二甲基苯胺为起始原料，经过硝化反应、重氮化碘代反应、Ullmann缩合反应、选择性双硝基单还原反应、重氮化水解反应、催化氢化反应和拆分，首次合成了--2-氨基-2'-羟基-4，4'，6，6'-四甲基-1，1'-联苯和--2-氨基-2'-羟基-4，4'，6，6'-四甲基-1，1'-联苯两个对映体。

Racemic backbones 2-amino-2'-hydroxy-6,6'-dimethyl-l,l'-biphenyl la and 2-amino-2'-hydroxy-4,4',6,6'-tetramethyl-l,1'-biphenyl 1b were synthesized from o-methylaniline and 2,4-dimethylaniline via nitration, diazotation/iodination, Ullmann coupling, selective reduction, diazotation/hydrolysis and hydrogenation.

从邻甲苯胺及2，4-二甲基苯胺出发，经过硝化，重氮化-碘代，偶联，单还原，重氮化-水解及还原反应合成了消旋体骨架2-氨基-2'-羟基-6，6'-二甲基-1，1'-联苯1a和2-氨基-2'-羟基-4，4'，6，6'-四甲基-1，1'-联苯1b。

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。