摘要有机羧酸酯是一类重要的应用广泛的化工产品,被广泛应用于有机合成、香料、涂料、化妆品、医药及高分子材料等工业,成酯的传统方法是先将羧酸制成酰氯或者酸酐,然后再与醇反应生成相应的酯,如果从醛制备酯,则要经过三步反应,这会降低酯的产率并需要较长的时间。因此,一步直接将醛或醇氧化成酯的方法具有重要的科学意义和研究价值。62996
本文通过对β-二酰基酮亚胺类配体的合成,进而在以醛或醇、配体以及DTBP为原料的催化体系下合成叔丁酯。同时通过对氧化酯化反应条件的探索,找出合适的催化剂,配体,溶剂,温度等反应条件,为羧酸酯的合成提供了一种新的合成方法。同时本文还对反应底物进行了一定的拓展,从而拓宽了该反应体系的适用范围。
毕业论文关键词:羧酸酯 醛 醇 氧化酯化
毕业设计说明书(论文)外文摘要
Title Study on the Oxidative Esterification
Abstract Organic esters are important classes of chemicals which have considerable applications in different areas of chemical industry such as herbicides, disinfectors, pharmaceuticals, plasticizers, solvents and intermediates. The traditional method is that the carboxylic acid prepared to chloride, and then react with alcohol to the corresponding ester. There are three steps of aldehyde to ester which need more time and have lower yield. It inspired us to invest the direct oxidation of aldehydes or alcohols to esters.
In this paper, through the synthesis of β-Diketiminato complexes, and then in the catalytic system with aldehyde or alcohol and DTBP as raw material react with the ligand to the corresponding esters. At the same time, through the exploration of reaction conditions, in order to find the suitable reaction conditions such as temperature, catalyst, ligand, solvent, this provides a new synthesis method for the synthesis of carboxylic ester. At the same time, in this paper we also extend the substrate, so as to broaden the scope of the reaction system.
Keywords carboxylic ether aldehyde alcohol oxidative esterification
1 引言 1
1.1 研究背景 1
1.2 氧化酯化反应的研究进展 2
1.2.1 醛的氧化酯化反应的研究进展 2
1.2.2 醇的氧化酯化反应的研究进展 4
1.3 课题任务 6
2 反应原理和方案设计 6
2.1 可能的反应原理 6
2.1.1 铜催化的醛的氧化酯化反应机理 6
2.1.2 铜催化醛与醇氧化酯化反应原理 7
2.2 方案设计 7
2.2.1 铜催化醛的氧化酯化反应条件优化方案设计 7
2.2.2 铜催化醛与醇的氧化酯化反应条件优化方案设计 8
3 实验部分 8
3.1 β-二酰基酮亚胺类配体的合成 8
3.2 铜催化醛的氧化酯化 9
3.2.1 铜催化的醛的氧化酯化反应的实验操作 9
3.2.2 铜催化的醛的氧化酯化反应的条件优化