构建一种高稳定的天然酸盐支持的催化剂,用于高效地氧化烯
Xingrui Yu1, Chao Xiong2, Yichao Liang1
1School of Chemical Engineering and Technology, Sun Yat-Sen University, Zhuhai 519082, China.
Journal of colloid and interface science
|January 21, 2024
概括
一种新型的催化剂 (Mo-MATP) 有效地将烯酸转化为环氧化物,产量为99%. 这种绿色化学方法提供了高稳定性和选择性,解决了化学制造中的污染和生产率问题.
科学领域:
- 化学工程是化学工程的重要组成部分.
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 环氧化物是重要的工业化学品,但其生产面临着环境和效率方面的挑战.
- 开发绿色,稳定和具有成本效益的环氧化催化剂对于可持续化学制造至关重要.
研究的目的:
- 合成和评估一种基于的新型催化剂 (Mo-MATP),用于高效和绿色的烯酸环氧化.
- 研究催化机制并评估催化剂的稳定性,产量和基质范围.
主要方法:
- 通过将阿塔普尔吉特用Mo(CO) 6.6修改为Mo-MATP催化剂的制备.
- 用 tert-butyl 氧化物 (TBHP) 作为氧化剂对油脂的催化环氧化.
- 在现场进行光谱分析 (FT-IR,ESR,HRMS),以阐明反应机制.
主要成果:
- 在17个循环后,Mo-MATP获得了99%的环氧甲氧化物 (CYCO) 产量,具有80%的选择性.
- 证明了TBHP的高利用率和广泛的基板适用性.
- 光谱数据表明,TBHP被Mo-MATP激活,形成过氧基,促进烯氧化.
结论:
- 摩-MATP催化剂提供了一个稳定,高效,可回收的解决方案,用于烯酸烯酸氧化.
- 稳定的加载可以防止催化剂漏,确保始终保持高性能.
- 这种催化系统代表了环氧化物生产绿色化学的重大进步.
相关概念视频
02:57Sharpless Epoxidation
4.0K
The conversion of allylic alcohols into epoxides using the chiral catalyst was discovered by K. Barry Sharpless and is known as Sharpless epoxidation. The use of a chiral catalyst enables the formation of one enantiomer of the product in excess. This chiral catalyst is mainly a chiral complex of titanium tetraisopropoxide and tartrate ester (specific stereoisomer). The stereoisomer used in the chiral catalyst dictates the formation of the enantiomer of the product. In other words, the use of...
4.0K
03:00Preparation of Epoxides
7.7K
Overview
Epoxides result from alkene oxidation, which can be achieved by a) air, b) peroxy acids, c) hypochlorous acids, and d) halohydrin cyclization.
Epoxidation with Peroxy Acids
Epoxidation of alkenes via oxidation with peroxy acids involves the conversion of a carbon–carbon double bond to an epoxide using the oxidizing agent meta-chloroperoxybenzoic acid, commonly known as MCPBA. Since the O–O bond of peroxy acids is very weak, the addition of electrophilic oxygen of...
Epoxides result from alkene oxidation, which can be achieved by a) air, b) peroxy acids, c) hypochlorous acids, and d) halohydrin cyclization.
Epoxidation with Peroxy Acids
Epoxidation of alkenes via oxidation with peroxy acids involves the conversion of a carbon–carbon double bond to an epoxide using the oxidizing agent meta-chloroperoxybenzoic acid, commonly known as MCPBA. Since the O–O bond of peroxy acids is very weak, the addition of electrophilic oxygen of...
7.7K
02:44Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
10.2K
Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
10.2K
01:13Olefin Metathesis Polymerization: Overview
2.1K
Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists...
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists...
2.1K
02:04Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids
5.8K
Diols are compounds with two hydroxyl groups. In addition to syn dihydroxylation, diols can also be synthesized through the process of anti dihydroxylation. The process involves treating an alkene with a peroxycarboxylic acid to form an epoxide. Epoxides are highly strained three-membered rings with oxygen and two carbons occupying the corners of an equilateral triangle. This step is followed by ring-opening of the epoxide in the presence of an aqueous acid to give a trans diol.
5.8K
02:21Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate
11.5K
Alkenes can be dihydroxylated using potassium permanganate. The method encompasses the reaction of an alkene with a cold, dilute solution of potassium permanganate under basic conditions to form a cis-diol along with a brown precipitate of manganese dioxide.
11.5K