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A Theoretical Study on the Reaction Mechanism of Epoxidation Reaction of the 4- Bicyclo

CEPS 思博网--文章书目；-1页数：7 需求点数：28 电子全文：请登入。篇名（4-溴甲基双环[4.4.1]-1，3，5，7，9-十一碳五烯基－3-）甲醇环氧化反应机理的理论研究

Under the catalysis of rare earth composite solid superacid SO42-/ZrO2-La2O3,reaction of a-pinene and anhydrous oxalic acid afforded bornyl oxalate smoothly. Followed by saponification reaction, borneol was obtained selectively.

在稀土复合固体超强酸SO42-/ZrO2-La2O3的催化下， a -蒎烯与无水草酸的反应能顺利生成草酸龙脑酯，经皂化反应后，能选择性地合成正龙脑。

A series of liquid crystals containing naphthalene 1~13 was synthesized by the reaction of carbonyl compound with Grignard reagent and coupling reaction between phenyl boronic acid and halogen naphthalene .

经羰基化合物与格氏试剂反应及芳基硼酸与萘基卤化物偶联反应合成了系列含萘环骨架液晶化合物1~13；产率在73%~759%。

The invention comprises the steps of dehydration reaction, purification treatment, bromization ring contraction integral reaction, separation, refining and by-product processing.

本发明包括脱水反应步骤、纯化处理步骤、溴代缩环一体化反应步骤、分离步骤、精制步骤和副产物加工步骤。

According to the result, we believed that the reason resulted in the low sensitivity was that the marker residue compound MQCA structure has changed after conjugated with protein and the antibody induced by the conjugation could not recognize the free MQCA in the ci-ELISA. Therefore we designed some hapten which could reserve the marker residue structural speciality mostly. After synthesis route selection and optimum, the hapten 7-Hydroxymethyl-3-methyl-quinoxaline-2-carboxylic acid was synthesized, used 4-methyl-2-nitroaniline as the start material via six steps, such as oxidation cyclization, bromize reaction, hydrolysis, Beirut reaction, reduction, hydrolysis. This work established basis for producing the high affinity antibody and developing the sensitive ELISA residue detection method.

本论文认为导致ELISA检测灵敏度较低的原因，是残留标示物和蛋白偶联后的特征结构发生改变，诱导产生的抗体不能够对游离MQCA很好的识别，因此，本论文设计了能够最大化保留MQCA结构特征的系列半抗原结构，并对其合成路线进行了筛选和优化，最终以对甲基邻硝基苯胺为起始原料，经氧化环化、溴代、水解、Beirut缩合、还原、水解六步反应制备含羟甲基结构的MQCA衍生物7-羟基甲基-3-甲基-喹噁啉-2-羧酸，为制备对游离残留标示物高亲和力的抗体，高灵敏度的ELISA残留检测方法的建立奠定基础。

Color reaction was performed in organic solution-salt solution biphasic system. The organic solution was 1,2-Dichloroethane-Isoamyl alcohol mixture (V/V=96:4) added Bromophenol blue (per 100 mL added 0.05 g). The salt solution was 55%K2HPO4 aqueous solution added Na3CO3 (per 100 mL added 14 g), under the temperature of color reaction between 12℃ to 25℃.

显色反应在有机溶液－盐溶液两相体系中进行，有机溶液为每100 mL 1，2-二氯乙烷－异戊醇混合溶液（体积比96：4）加入0.05 g溴酚蓝，12~25℃显色反应条件下，盐溶液为每100 mL 55%K2 HPO4水溶液加入14 g Na2CO3。

For the purpose of research on relationship between liquid crystal phenomena and blood compatibility, the propionic, n-butyric esters of hydroxypropyl cellulose were prepared with hydroxypropyl cellulose and propionyl chloride/ butyryl chloride. The reaction conditions and phase behavior have been studied. The results show that the reaction time, temperature and amount of propionyl chloride have effect on content of propionyl, and the amount of proionyl chlorideis more obvious than the other factors.

液晶态的血液相容性是目前抗凝血材料研究的一个新领域，本文是在一系列液晶态材料血液相容性研究的基础上以羟丙基纤维素和丙酰氯为原料合成羟丙基纤维素丙酸酯和羟丙基纤维素丁酸酯两种液晶高分子化合物，并对其合成条件和相变行为进行了研究，结果表明：反应时间、反应温度和酰氯的用量均对产物中的酰基含量有影响，其中以酰氯用量影响最为明显。

Stannous caprylate was selected as the catalyst. Under certain vacuum, we investigate the relation of both the dose of catalyst, the temperature of reaction, the time of reaction and the molecular weight of the PLA.Furthermore we investigate how the purity of lactide and the circumstance of vacuum affect the molecular weight of the PLA.

实验中选用辛酸亚锡Sn(oct_2为催化剂，在一定的真空度下考察了催化剂用量、反应温度、反应时间与聚乳酸分子量的关系；并考察了丙交酯纯度及真空度对聚乳酸分子量的影响。

The browning reaction is mostly non-enzymatic browning, including maillard reaction and caramelization .

浓缩苹果汁的生产工艺基本消除了果汁贮藏期的酶促褐变，在贮藏期的褐变限于非酶促褐变，主要是Maillard反应和焦糖化反应。

Therefore, this paper studied on scorched flavor boiled sunflower seed Processing Technology, tried to find out evidence of increase flavor by maillard reaction and caramelization, and analysed scorched flavor content by GC/MS. The results obtained were as follows: Used maillard reaction and caramelization to optimize sunflower seed sugar addition, baking time, baking temperature, spreading thickness, increase scorched flavor of boiled sunflower seed.

为此，论文研究了焦香味煮制葵花籽的生产工艺、探寻美拉德与焦糖化反应增香的证据、并对焦香味进行GC／MS分析，得出如下结果：利用美拉德反应和焦糖化反应原理，优化葵花籽中的糖添加量，烘烤时间，烘烤温度，摊放厚度等因素，增强煮制葵花籽的焦香味。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。