epoxidation

简明释义

英[ɪpˌɒksɪˈdeɪʃən]美[epɑːksɪˈdeɪʃn]

n. [有化] 环氧化作用

英英释义

单词用法

同义词

反义词

例句

1.The comparison of heterogenized and homogenous catalyst on epoxidation of different alkene was also given.

同时与均相催化剂空气环氧化不同烯烃的性能进行了对比。

2.Moreover, the effects of reaction temperature and the concentrations of oxidant and catalyst on the epoxidation of EPDM were investigated as well.

分别考察了反应温度、反应时间、氧化剂和催化剂浓度对环氧化反应的影响。

3.Styrene epoxidation was carried out using styrene as the row material, molecular oxygen as the oxidant, and modified vanadium phosphorus oxide as the catalyst.

以苯乙烯为原料，分子氧为氧化剂，改性的钒磷氧化物为催化剂合成环氧苯乙烷。

4.The SCF technology actualises the idea of green chemistry in liquefaction of microalgae and epoxidation of propylene reaction.

超临界流体技术在微藻液化和丙烯环氧化反应的应用正是体现绿色化学的思想。

5.The epoxy group of epoxidation product of SBS has been proved by IR.

通过红外光谱对SBS的环氧化产物中环氧基团的存在进行证实。

6.The use of performic acid, an affordable and easily prepared reagent, in epoxidation led to quantitatively the target epoxide.

在环氧化反应中，利用价廉、易制备的过氧甲酸以几乎定量的收率得到了环氧化合物。

7.The project also found that some iron-containing molecular sieves or compounds could catalyze the epoxidation of high olefins using oxygen as the oxidant.

项目还发现了一些含铁分子筛或化合物可以催化以氧气为氧化剂的高碳烯烃的环氧化反应。

8.Based on the reaction medium and the elements in the catalysts, the recent progresses of epoxidation of alkenes with hydrogen peroxide have been reviewed.

以反应介质和主催化元素为线索，对双氧水为氧源的烯烃环氧化反应的最新研究进展进行了综述。

9.Two different integrated processes of the epoxidation of allyl chloride and production of hydrogen peroxide by anthraquinone route were investigated.

对两种不同的氯丙烯环氧化与蒽醌法生产过氧化氢过程的集成方法进行了研究。

10.The process of converting alkenes into epoxides through the reaction known as epoxidation is widely used in organic chemistry.

通过被称为环氧化的反应将烯烃转化为环氧化物的过程在有机化学中得到广泛应用。

11.In the synthesis of pharmaceuticals, epoxidation can be a crucial step for creating reactive intermediates.

在制药合成中，环氧化可能是创建反应性中间体的关键步骤。

12.Researchers are exploring new catalysts to improve the efficiency of epoxidation reactions.

研究人员正在探索新的催化剂以提高环氧化反应的效率。

13.The epoxidation of fatty acids can lead to the production of valuable biofuels.

脂肪酸的环氧化可以导致生产有价值的生物燃料。

14.Understanding the mechanism of epoxidation helps chemists design better synthetic routes.

理解环氧化的机制帮助化学家设计更好的合成路线。

作文

In the realm of organic chemistry, the process of epoxidation plays a crucial role in the synthesis of various compounds. Epoxidation refers to the chemical reaction that converts alkenes into epoxides, which are three-membered cyclic ethers. This transformation is significant due to the unique reactivity of epoxides, making them valuable intermediates in the production of pharmaceuticals, agrochemicals, and other fine chemicals. Understanding the mechanisms and applications of epoxidation can provide insights into its importance in both industrial and academic settings. The mechanism of epoxidation typically involves the addition of an oxidizing agent to an alkene. Common oxidants used in this reaction include peracids, such as peracetic acid and performic acid, as well as transition metal catalysts. The choice of oxidant can influence the regioselectivity and stereoselectivity of the epoxidation process. For instance, using m-chloroperbenzoic acid (MCPBA) is one of the most widely utilized methods for achieving high yields of epoxides from alkenes. One of the key features of epoxidation is its ability to create chiral centers in the resulting epoxide. This characteristic is particularly important in the pharmaceutical industry, where the chirality of a compound can significantly affect its biological activity. As a result, researchers have developed various asymmetric epoxidation methods to produce enantiomerically pure epoxides, which can lead to more effective drugs with fewer side effects. Moreover, the utility of epoxides extends beyond their role as intermediates. They can undergo further reactions, such as ring-opening, to yield a variety of products. This versatility allows chemists to design synthetic pathways that can lead to complex molecules with specific functionalities. For example, the ring-opening of epoxides with nucleophiles can produce alcohols, amines, or other functional groups, thereby expanding the range of potential applications for these compounds. In addition to their synthetic applications, epoxides also possess interesting physical and chemical properties. They are generally more reactive than their parent alkenes, which makes them suitable for a variety of chemical transformations. However, this reactivity can also pose challenges in terms of stability and handling. Therefore, understanding the conditions under which epoxidation occurs and the stability of the resulting epoxides is essential for chemists working in this field. In conclusion, epoxidation is a vital reaction in organic chemistry that facilitates the conversion of alkenes into valuable epoxide intermediates. Its significance is underscored by its applications in the synthesis of pharmaceuticals and other important chemicals. As research continues to advance in this area, new methods and strategies for epoxidation are likely to emerge, further enhancing our ability to create complex molecules efficiently. The study of epoxidation not only enriches our understanding of organic reactions but also opens up new avenues for innovation in chemical synthesis.

在有机化学领域，环氧化过程在各种化合物的合成中起着至关重要的作用。环氧化指的是将烯烃转化为环氧化物的化学反应，这是一种三元环醚。这一转化因环氧化物独特的反应性而显得重要，使其成为药物、农用化学品和其他精细化学品生产中的宝贵中间体。理解环氧化的机制和应用可以为我们提供关于其在工业和学术环境中重要性的见解。 环氧化的机制通常涉及将氧化剂添加到烯烃中。常用的氧化剂包括过酸，如过乙酸和过甲酸，以及过渡金属催化剂。氧化剂的选择会影响环氧化过程的区域选择性和立体选择性。例如，使用对氯苯甲酸过氧化物（MCPBA）是实现高产率从烯烃获得环氧化物的最广泛使用的方法之一。 环氧化的一个关键特点是它能够在生成的环氧化物中创建手性中心。这一特性在制药行业尤其重要，因为化合物的手性会显著影响其生物活性。因此，研究人员开发了各种不对称环氧化方法，以生产对映体纯的环氧化物，从而可能导致更有效的药物，副作用更少。 此外，环氧化物的用途不仅限于作为中间体。它们可以进一步反应，例如开环，产生多种产品。这种多功能性使化学家能够设计合成路径，导致具有特定功能的复杂分子。例如，环氧化物与亲核试剂的开环反应可以产生醇、胺或其他功能团，从而扩大这些化合物的潜在应用范围。 除了合成应用外，环氧化物还具有有趣的物理和化学性质。它们通常比其母体烯烃更具反应性，这使它们适合进行各种化学转化。然而，这种反应性也可能在稳定性和处理方面带来挑战。因此，理解环氧化发生的条件以及所产生的环氧化物的稳定性对于从事该领域的化学家至关重要。 总之，环氧化是有机化学中一种重要的反应，促进了烯烃转化为有价值的环氧化物中间体。其重要性通过其在药物和其他重要化学品合成中的应用得到了强调。随着这一领域的研究不断进展，新的环氧化方法和策略可能会出现，进一步增强我们高效创造复杂分子的能力。对环氧化的研究不仅丰富了我们对有机反应的理解，还为化学合成中的创新打开了新的途径。