通过多胺材料作为异质催化剂介导的appel反应的机械洞察力
Nidhi Kumari1, Anup Mahata1, Biswarup Chakraborty1
1Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas 110016, New Delhi, India.
一种新的无形聚合物胺 (POP) 材料作为一种无金属的有机催化剂,用于酒精化. 这种稳定,可回收的材料通过在位生成的氨基胺表现出高效的催化作用,提供广泛的基质范围和功能组耐受性.
科学领域:
- 材料科学:开发新型无形聚合物胺 (POP) 材料.
- 有机化学:用于催化应用的含胺聚合物的探索.
背景情况:
- 聚胺具有热化学稳定性,经常用作阻燃剂.
- 分子胺基作为易斯基和氨酸中介反应中介的作用.
- 有机合成中需要无金属,可回收的有机催化剂.
研究的目的:
- 合成和描述一种新的无形聚合物胺 (POP) 材料.
- 为了研究POP在酒精化Appel反应中的催化活性.
- 阐明催化机制并确定关键反应参数.
主要方法:
- 通过缩三2-氨基乙基) 胺 (TREN) 和二 (PPDC) 来合成POP.
- 使用31P CPMAS NMR,FTIR,拉曼光谱,X射线光电子光谱和元素分析进行了表征.
- 在阿佩尔反应中的催化评估,包括动力和标记研究.
主要成果:
- 无金属有机物质POP,含量为19.7%的无金属有机物质,已成功合成和表征.
- 在阿佩尔反应中,POP表现出催化活性,达到76%的酒精转化率和462.2的量.
- 从POP中在现场生成的氨基氨酸被确定为酒精化的活性催化剂,显示出广泛的基质范围和功能组耐受性.
结论:
- 无形聚合物胺 (POP) 是一种有效的,可回收的,无金属的有机催化剂,用于酒精化.
- 催化机制涉及在位降解胺基单元到阿米诺,与酒精deprotonation作为速度限制的步骤.
- POP代表了对氨酸介导的有机催化剂有前途的新类有机材料.
更多相关视频
07:06A Microwave-Assisted Direct Heteroarylation of Ketones Using Transition Metal Catalysis
Published on: February 16, 2020
19:58Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
Published on: July 30, 2017
相关概念视频
Olefin Metathesis Polymerization: Overview
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists...
Catalysis
Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
Aldehydes and Ketones to Alkenes: Wittig Reaction Mechanism
The reaction begins with the nucleophilic addition between a phosphorus ylide and the carbonyl compound. Due to its carbanionic character, phosphorus ylide acts as a strong nucleophile and attacks the electrophilic carbonyl group. This generates a charge-separated dipolar intermediate called betaine. The negatively charged oxygen atom and...
Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)
α-Bromination of Carboxylic Acids: Hell–Volhard–Zelinski Reaction
![Mizoroki-Heck Cross-coupling Reactions Catalyzed by Dichloro{bis[1,1',1''-phosphinetriyltripiperidine]}palladium Under Mild Reaction Conditions](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F51444.jpg&w=3840&q=50)