乙酰基

This chelating starch was used to chelate copper and argentum ions,and thermal gravity analysis was .

以淀粉为原料，接枝丙烯酸甲酯，然后与乙二胺反应，合成了具有多个酰胺基和胺基的螯合淀粉。

Study on an efficient process for the preparation of trifloxystrobin starting from 2-methylacetophenone bypartial oxidation,esterification,reaction with methoxyamine,bromization and condensation with 3'- acetophenone oxime.

以邻甲基苯乙酮为原料，经过高锰酸钾的碱性氧化，甲醇酯化，再与甲氧基胺盐酸盐肟化后，用N-溴丁二酰亚胺溴化，最后和间三氟甲基苯乙酮肟缩合得到目标产物肟菌酯。

Ethyl phenoxyacetate has been synthesised by the reaction of phenol with ethyl chloroacetate under the condition of solid-liquid phase transfer catalysis using PEG-400 as the catalyst.

于固一液相转移催化条件下，以PEG-400为催化剂，通过苯酚与氯乙酸乙酯反应合成了苯氧基乙酸乙酯。与85％的水合肼作用得到相应的酰肼。

Ingredients: water,decyl glucoside,glycerin,sodium cocoamphodiacetate,sodium pca,polysorbate-20,cocamidopropyl betaine,carya illinoensis powder,panthenol,carbomer,aloe barbadensis leaf juice,lavandula angustifolia oil,perfume,tetrasodium edta,lactic acid.

主要成份：去离子水，葵基葡聚糖，甘油，椰油两性二醋酸二钠，吡咯烷酮羧酸钠，聚山梨醇酯-20 ，椰油酰胺丙基甜菜碱，核桃粉，泛醇，卡波姆，芦荟叶萃取物，薰衣草精油，香精，乙二胺四乙酸四钠，乳酸。

The key intermediate 3-methylaminopiperidine was synthesized from 3-methylaminopyridine by two methods,formylation and lithium aluminium hydride reduction or condensation with triethyl orthoformate and sodium borohydride reduction,and then hydr...

以3-氨基吡啶为原料，分别通过甲酰化反应、氢化铝锂还原和原甲酸三乙酯缩合、硼氢化钠还原两种方法得到3-甲胺基吡啶，最后经催化氢化得到中间体3-甲胺基哌啶。

The key intermediate 3- methylaminopiperidine was synthesized from 3-methylaminopyridine by two methods, formylation and lithium aluminium hydride reduction or condensation with triethyl orthoformate and sodium borohydride reduction, and then hydrolysis.

以3-氨基吡啶为原料，分别通过甲酰化反应、氢化铝锂还原和原甲酸三乙酯缩合、硼氢化钠还原两种方法得到3-甲胺基吡啶，最后经催化氢化得到中间体3-甲胺基哌啶。

A GC headspace injection method for the determination of residual organic solvents such as methanol, ethanol, acetonitrile, dichloromethane, ethylacetate, 4 methyl 2 pentanone, toluene, DMF, chloroform and tetrahydrofuran in tazobactam was established.

建立了气相色谱顶空进样法测定三唑巴坦中甲醇、乙醇、乙腈、二氯甲烷、乙酸乙酯、甲基异丁基酮、甲苯、N ，N′-二甲基甲酰胺、氯仿和四氢呋喃等有机溶剂的残留量。

The solubility of the novel polyamides are greatly improved compared with the conventional aramids, especially the polyamide with dendritic blocks of the second genernation as side chains are soluble in most of the common organic solvents such as ether, ethyl acetate, chloroform, acetone, tetrahydrafuran etc.

树状片段的引入大大地改善了聚酰胺的溶解性，特别是以第二代树状片段为侧基的聚酰胺的溶解性得到了很大的改进，可以溶于大部分常见的有机溶剂，如乙醚、乙酸乙酯、氯仿、丙酮、四氢呋喃等。

Occasionally, we observed the four-component iodoamination of 1, 2-allenyl selenides with I〓 in MeCN at room temperature.

我们还发现1，2-联烯基硒醚在无水乙腈中可以与碘发生碘胺化反应生成酰胺，在此反应中溶剂乙腈参与了反应。

In the third step, when the ratio of racemic ester to benzenesulfonyl chloride to triethylamine to catalyst 4-DMAP is 1:1:1:0.1 in 10℃, the yield is 82.9% and high purity is obtained by crystallisation.

在第三步磺酰化反应中，得到合成消旋2-苯磺酸基-2(2-氯苯基)乙酸甲酯的较佳反应条件为邻氯扁桃酸甲酯：苯磺酰氯：三乙胺=1：1：1，催化剂4-DMAP用量为摩尔反应物的10%，反应温度为10℃，收率为82.9%，同时用结晶方法获得高纯度的产物。

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。