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Keywords diethyl oxalate;2-pentanone;methylhydrazine;pyrazole carboxylic acid; 草酸二乙酯;2-戊酮;甲基肼;吡唑羧酸;
pyrazole carboxylic acid 吡唑酸
A series of 2 pyrazolyl 5 substituted 1,3,4 oxadiazoles were synthesized starting from 5 pyrazole formic acid hydrazide and carboxylic acid by one pot method in the presence of phosphorus oxychloride. 以 5 吡唑甲酰肼和取代羧酸为起始物 ;运用“一锅煮”法合成了一系列 2 取代 5 吡唑基 1 ;3 ;4 ?二唑 .
Carboxylic acid esters are important chemical raw materials. 羧酸酯是重要的化工原料。
Sulfuric acid is main catalyst for the synthesis of carboxylic acid esters. 羧酸酯的合成主要用硫酸作催化剂，但这种催化剂有许多缺点。
One exception is the decarboxylation of aromatic carboxylic acids. 芳香羧酸进行脱羧反应是一个例外。
The scheme initially involves acylation of thiophene using a carboxylic acid to afford the acyl thiophene. 这条路线是先用羧酸使噻吩已酰化制得酸基噻吩。
Carboxylic acid was peroxidized in organic solvents catalyzed by lipase and glycidol was synthesized from allyl alcohol catalyzed by acid peroxide. 摘要利用脂肪酶在有机介质中催化制备过氧酸，丙烯醇在过氧酸的作用下发生环氧化反应生成环氧丙醇。
Nitric acid oxidation was found to reduce the surface hydroxyl (OH) groups in increasing the carboxylic acid (COOH) groups. 硝酸氧化减少了碳纤维表面的羟基含量，同时增加了碳纤维表面的羧基含量。
In the reaction, some aniline is completely oxidized to CO2 or partially oxidized to carboxylic acid. 在反应中有一部分苯胺被完全氧化或部分氧化成CO2或羧酸，
PVAC latex is prepared by the polymerization of the new type of ethylene carboxylic acid . 采用乳液聚合制备了新的丙烯酸改性的聚乙酸乙烯酯(PVAC)乳液。
Preparation methods and degradation behavior for poly(carboxylic acid silyl ester)s were reviewed. 综述了聚羧酸硅基酯的合成方法和降解性质。
The formate activates the carboxylic acid and functions as a source of nucleophilic alkoxide. 羧酸甲酸激活的职能和核醇源泉.
The paper introduces the catalyst research advances in esterification reaction of carboxylic acid. 本文介绍了羧酸酯化反应催化剂的研究进展。
Ingredients: Chamomile extract, hamamelis extract, pyrroldone carboxylic acid, HA, etc. 主要成份：春黄菊提取液，金缕梅提取液、吡咯烷酮羧酸、透明质酸等。
Pyruvic acid A 3-carbon carboxylic acid (CH3COCOOH) that is an intermediate in GLYCOLYSIS. 丙酮酸：一种三碳羧酸(CH3COCOOH)，是糖酵解的中间物。
FD is a kind of retanning agent condensated with glyoxal,formaldehyde,carboxylic acid and urea. 复鞣剂FD是一种由乙二醛、甲醛、羧酸衍生物、尿素等缩合而成的两性皮革复鞣剂。
The last step is the oxidation reaction that converts the alkyne triple bond to carboxylic acid group. 通过对五种醛和三种末端炔进行的条件筛选，确立了通用合成方法。
In this papev,is be explorated the capability of PVAC latex of ethylene carboxylic acid . 考察了丙烯酸改性的PVAC乳液的性能。
The effect of potassium borohydride on ester and carboxylic acid reduction was introduced. 研究了硼氢化钾对酯和羧酸的还原作用。