1,3-二烯的三组分1,2-脱氧化,使用碳酸和TEMPO的碳酸
Sophia M Baldassarre1, Heidi S Sato1, Adam P Louise1
1Department of Chemistry and Biochemistry, University of Tampa, Tampa, Florida 33606, United States.
The Journal of organic chemistry
|November 4, 2024
概括
一个新的无金属反应使得使用TEMPO和碳酸酸的1,3-dienes轻度的1,2-二氧化. 这种选择性氧化可以获得有价值的邻近二氧化物化合物及其衍生物.
科学领域:
- 有机化学 有机化学
- 催化剂是一种催化剂.
- 合成方法论 合成方法论
背景情况:
- 1,3-二烯是有机合成中的多功能构建块.
- 选择性氧化dienes仍然是一个合成的挑战.
- 无金属的催化方法对于可持续化学是非常可取的.
研究的目的:
- 开发一种温和的,无金属的方法,用于1,3-dienes的1,2-二氧化.
- 探索新反应的范围和局限性,使用各种二烯和碳酸.
- 为了研究观察到的二氧化反应的机制.
主要方法:
- 该反应使用2,2,6,6-四甲基胺-1-氧基 (TEMPO) 作为催化剂和碳素酸作为氧化剂.
- 测试了一系列的1,3-二烯,包括亚利法和芳香基质.
- 随后对二氧化物产品进行了衍生,包括基还原.
主要成果:
- 开发的方法实现了1,3-dienes的温和,无金属的1,2-二氧化,具有高的位点和区域选择性.
- 这种反应与各种异性和芳香碳酸盐酸有效.
- 由此产生的邻近有氧化物的支架可以进一步功能化,证明了合成效用.
结论:
- 已经建立了一个新的,高效的无金属的1,3-dienes的二氧化.
- 反应通过碳酸驱动的TEMPO不成比例进行,实验和计算研究证实了这一点.
- 这种方法提供了一个有价值的新工具,用于访问功能化的邻近二氧化化合物.
相关概念视频
Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids
5.6K
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.
5.6K
[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction
10.1K
The Diels–Alder reaction is an example of a thermal pericyclic reaction between a conjugated diene and an alkene or alkyne, commonly referred to as a dienophile. The reaction involves a concerted movement of six π electrons, four from the diene and two from the dienophile, forming an unsaturated six-membered ring. As a result, these reactions are classified as [4+2] cycloadditions.
10.1K
Diels–Alder Reaction: Characteristics of Dienes
4.1K
The Diels–Alder reaction brings together a diene and a dienophile to form a six-membered ring. Both components have unique characteristics that influence the rate of the reaction.
Characteristics of the diene
Conformation
The simplest example of a diene is 1,3-butadiene, an acyclic conjugated π system. At room temperature, the molecule exists as a mixture of s-cis and s-trans conformers by virtue of rotation around the carbon–carbon single bond. Although the s-trans isomer is...
Characteristics of the diene
Conformation
The simplest example of a diene is 1,3-butadiene, an acyclic conjugated π system. At room temperature, the molecule exists as a mixture of s-cis and s-trans conformers by virtue of rotation around the carbon–carbon single bond. Although the s-trans isomer is...
4.1K
Carboxylic Acids to Methylesters: Alkylation using Diazomethane
2.1K
Carboxylic acids react with diazomethane in an ether solvent via alkylation at the carboxylate oxygen atom to give methyl esters of the corresponding acid with excellent yields.
2.1K
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
9.9K
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.
9.9K
Preparation of Diols and Pinacol Rearrangement
3.3K
Compounds bearing two hydroxyl groups are known as diols. When the hydroxyl groups are located on adjacent carbon atoms, the diols are called vicinal diols or glycols. Under acidic conditions, vicinal diols undergo a specific reaction called pinacol rearrangement.
The reaction begins with transferring a proton from the acid catalyst to one of the hydroxyl groups, producing an oxonium ion.
The reaction begins with transferring a proton from the acid catalyst to one of the hydroxyl groups, producing an oxonium ion.
3.3K


