乙酸基

The main products are: HH-01 fungicides HH-02 organic dispersant HH-03 cationic starch Wood HH-04 cationic starch Department HH-05 modified starch warp sizing agents also sell German Baker Chemical Co., Ltd. Main Products Defoamer series product: E640, T50 Surface Sizing Agent: A281, A288, K532, pesticides / medicine / veterinary medicine a variety of intermediate products (p-Bromo-p-Bromotoluene bromoform 1 - bromo-heptane triethyl citrate 1,2, 3 - Three Bromopropane 3 - chloro -4 - fluoro bromobenzene Bromotoluene ethylbenzene 4 - bromo -2 - bromo-ethyl-Chloroaniline 2 - bromo--5 - chloro-toluene 3 - bromo-methyl 1,6 C - Dibromo Hexane 1 - bromo -4 - nitrobenzene o-methoxy benzaldehyde acid propyl bromide p-fluorotoluene bromo dodecane toluene four of iodine bromide bromoethane three citric acid tert-butane n-butyl 2 - bromo-p-bromo-butane Hydroxybenzaldehyde between 2 - bromo-propionic acid bromide veratryl aldehyde inter-bromo-trifluoro-n-hexane of toluene on Bromoxynil Bromotoluene toluene ethylbenzene o-bromophenol bromide bromide Cyclohexane Cyclopentane bran acid dibutyl maleate Ethyl Lactate Propylene between bromine bromine bromine between aniline o-anisidine o-fluorophenol difluorobenzonitrile to aminobenzaldehyde Bromotoluene aniline on Bromobenzaldehyde Bromotoluene acid) and other relevant units have been in substantial promotion, and client set up a good relationship of cooperation has been the user's praise.

现主要产品：HH—01杀菌剂 HH—02有机分散剂HH—03阳离子淀粉 HH—04木署阳离子淀粉 HH—05 经纱上浆变性淀粉同时还代理销售德国贝克化学公司系列产品主要产品消泡剂：E640 、T50 表面施胶剂：A281、A288 、K532，农药/医药/兽药中间体多种产品(对溴苯酚对溴甲苯溴仿 1-溴庚烷柠檬酸三乙酯 1，2，3-三溴丙烷 3-氯-4-氟溴苯对溴乙苯 4-溴-2-氯苯胺溴乙酸乙酯 2-溴-5-氯甲苯 3-溴丙酸甲酯 1，6-二溴己烷 1-溴-4-硝基苯邻甲氧基苯甲醛溴乙酸丙酯对氟甲苯溴代十二烷对碘甲苯四溴乙烷溴代叔丁烷柠檬酸三丁酯 2-溴氯苯间羟基苯甲醛溴丁烷 2-溴丙酸黎芦醛溴已烷间溴三氟甲苯对溴苯腈对溴乙苯邻溴甲苯溴代环已烷溴代环戊烷糠溴酸马来酸二丁酯溴丙烯乳酸乙酯间溴苯胺间溴苯甲醚邻氟苯酚邻氟苯腈对氨基苯甲醛对溴苯胺对溴苯甲醛对溴苯甲酸)等在相关单位得到了大量推广，与客户建立了良好的合作关系，得到了用户的赞誉。

With the catalyst TiO2/SO(superscript 2- subscript 4), 2, 4, N-trinitroanilinoacetic acid was synthesized from chlorobenzene and glycine with yield of 71.6%.

以纳米固体酸TiO2/SO(上标 2-下标 4)为催化剂，氯苯和氨基乙酸为原料直接合成了2，4，N-三硝基苯胺基乙酸，收率为71.6%。

The surface hydroxyl group onto magnetic polyvinyl acetate nanoparticles can be obtained by saponification reaction on their surface.

结果表明，磁性聚苯乙烯颗粒与丁二酸酐发生Freidel-Crafts酰基化反应，可以在颗粒表面引入少量羧基；磁性聚甲基丙烯酸甲酯颗粒分别与乙二醇、二缩三乙二醇、聚乙二醇等发生醇-酯交换反应，可以在颗粒表面接枝不同分子链长度的末端羟基；磁性聚醋酸乙烯酯颗粒经过醇解或皂化反应可以获得表面羟基；磁性聚丙烯酸甲酯颗粒通过乙二胺或1，6己二胺的胺解反应可以得到表面氨基，继而与一氯乙酸反应可以引入亚胺二乙酸基团。

It demonstrated that the hydroxy organic acids substituted with-OH,-SH at α—C such as lactic acid, Hydroxy-acetic acid, mercapto-acetic acid, glyconic acid have good selectivity for separation of hematite and aegirine pka values of organic acids fall down because of the-I inductive effect of-OH or-SH, and lie at the pH range between two minerals point-zero-charge. As a result, the depression ability of them was enhanced, and a cyclo-pentyl chelate was formed when this organic acids acted with Fe〓 on the minerals surface.

发现在α位具有-OH、-SH等取代基的短链一元羧酸（乳酸、羟基乙酸、巯基乙酸，葡萄糖酸）对赤铁矿与钠辉石的浮选分离具有优良的选择性抑制作用，-OH、-SH的-I诱导效应导致有机酸的pKa值下降并落在两种矿物零电点之间，使其抑制性能增强，并与矿物表面的Fe〓形成稳定的五元螯合环。

Replacement of one benzimidazole fragment with benzothiazole or benzoxazole and optimization of the structure to create the new frame of the compounds were also carried out with the exception to find more potent compounds. The purpose of design and synthesis of these compounds is to investigate the QSAR of this class of compounds with the inhibition of HCV NS3/NS4A protease and eventually to develop more potent inhibitors.

本文首次采用了丙二酰胺与邻芳二胺在微波辐射下制备对称性双芳并唑甲烷化合物、用芳并唑-2-乙酸乙酯与邻芳二胺在微波辐射下制备非对称性双芳并唑甲烷化合物、用4-取代噻唑-2-乙酸乙酯与邻芳二胺在微波辐射下制备非对称性(4-取代-噻唑-2-基)(1H-芳并咪唑-2-基)甲烷化合物等合成路线，共合成了48个目标化合物，其中41个为新化合物，用~1HNMR，ESI-MS，FT-IR，元素分析对这些化合物进行了全面表征，确定了这些化合物的结构，并对部分化合物进行了~(13)CNMR分析。

In this catalyst system, the Knoevenagel condensations of a series of aromatic aldehydes with malononitrile or ethyl cyanoacetate were programmed and a mechanism was postulated as well. When aromatic aldehydes reacted with ethyl cyanoacetate, the corresponding alkenes proved to be E-isomers by 1H NMR.

在该反应体系中考察了一系列芳香醛和丙二氰、氰基乙酸乙酯的缩合反应，并推测了Knoevenagel缩合反应的机理，芳香醛与氰基乙酸乙酯缩合产物经1H NMR检测为E式烯烃。

Based on the problem of various types of catalyst and according to the features of carbonylation catalysts reactions, our team has been designed a series of new metal complexes of benimidazoles, which can be used for carbonylation catalyst of industry. Seven new benzimidazole derivatives were prepared by the o-phenylenediamine、oxalic acid、glycolic acid、monomethyl monopotassium malonate、ethyl cyanoacetate、succinic anhydride. The structures of them were confirmed by IR、Elemental analsis. The crystal structures of d and e were determined by X-ray single crystal diffraction of Germanic Bruker Smart APEX II CCD. The catalysis of them was tested by carbonylation reactions.

本文设计以邻苯二胺和草酸、羟基乙酸、丙二酸单甲酯、氰基乙酸乙酯、丁二酸单甲酯为原料采用PPA催化和无机酸催化法，合成了4种苯并咪唑-2-羧酸衍生物并进行了表征；培养了2个化合物d、e的晶体并测定和讨论了晶体结构；制备了3种未见报道的苯并咪唑金属配合物，对配合物在羰基化法制醋酐-醋酸反应的催化作用进行了初步试验。

In the presence of sodium as catalyst, the ester exchange reaction between methyl dimethoxy acetate and cephalotaxine produced cephalotaxine dimethoxy acetate, which was then hydrolyzed in dilute hydrochloric acid. Spectrum analysis showed one of hydrolytic products was cephalotaxinone.

本文报导己二甲氧基乙酸甲酮和三尖杉碱在金属钠催化下，直接进行酯交换反应生成二甲氧基乙酸三尖杉酯，后者在稀盐酸中水解，水解产物之一经光谱分析碳定为三尖杉酮碱。

In order to investigate the mechanism for this reac-tion, methyl α-bromoacetate or ethyl α-bromoacetate as starting material was added to the solution of phenyl selenoamide in ethanol in 1∶1 or 2∶1 molar ratio under the neutral condition at room temperature. The results indicated that the same product bis or bis diselenide was formed. Byproduct ethyl benzoate was also separated.

为了研究该反应机理，选择α-溴代乙酸甲酯或α-溴代乙酸乙酯在无催化剂、中性条件下，乙醇溶液中与苯基硒代酰胺室温下反应，投料比为1∶1和2∶1，结果也都生成了同一类产物二甲氧羰基甲基二硒醚或二乙氧羰基甲基二硒醚，同时还分离得到了相应的副产物苯甲酸乙酯。

In order to investigate the mechanism for this reaction, methyl α-bromoacetate or ethyl α-bromoacetate as starting material was added to the solution of phenyl selenoamide in ethanol in 1:1 or 2:1 molar ratio under the neutral condition at room temperature. The results indicated that the same product bis or bis diselenide was formed. Byproduct ethyl benzoate was also separated.

为了研究该反应机理，选择α-溴代乙酸甲酯或α-溴代乙酸乙酯在无催化剂、中性条件下，乙醇溶液中与苯基硒代酰胺室温下反应，投料比为1：1和2：1，结果也都生成了同一类产物二甲氧羰基甲基二硒醚或二乙氧羰基甲基二硒醚，同时还分离得到了相应的副产物苯甲酸乙酯。

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。