副平面的5H-Cyclopenta[2,1-b:3,4-b']二氧化联体:在不对称环开放反应中的合成和应用
Han Yang1, Xiaojie Sun1, Zhen Chen1
1Hefei National Research Center for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui, 230026, P. R. China.
Angewandte Chemie (International ed. in English)
|October 8, 2024
概括
新的轴性性平面双二联体使得高效和立体选择性的铜催化环开放反应成为可能. 这些新型连接体在以前方法失败的庞大基质上表现出色.
科学领域:
- 有机化学 有机化学
- 催化剂是一种催化剂.
- 不对称的合成方法
背景情况:
- 双二联体在过渡金属催化过程中至关重要.
- 奇拉双胺具有独特的反应性和立体选择性.
- 开发新的性联结体是促进催化方法的关键.
研究的目的:
- 设计和合成新型的轴性性平面性双二连接体.
- 为了研究这些配体在不对称催化剂中的实用性.
- 为了克服以前的催化系统的局限性.
主要方法:
- 合成的亚特罗波基拉斯平面双氨酸连接体.
- 复合铜用于催化.
- 应用在铜催化环开放的循环diaryliodoniums.
主要成果:
- 成功合成了具有轴性性脚手架的新型双胺连接体.
- 在铜催化反应中证明了高效率和立体选择性.
- 通过大量的二次氨基酸成功实现了催化,克服了以前的局限性.
结论:
- 轴性性平面双胺连接体在铜催化中有效.
- 设计的连接体提供了一个宽的性环境,适合大型基板.
- 这项工作通过新联体开发推进了非对称合成.
相关概念视频
Diels–Alder Reaction Forming Cyclic Products: Stereochemistry
3.8K
The Diels–Alder reaction is one of the robust methods for synthesizing unsaturated six-membered rings. The reaction involves a concerted cyclic movement of six π electrons: four π electrons from the diene and two π electrons from the dienophile.
3.8K
[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
Cycloaddition Reactions: Overview
2.5K
Cycloadditions are one of the most valuable and effective synthesis routes to form cyclic compounds. These are concerted pericyclic reactions between two unsaturated compounds resulting in a cyclic product with two new σ bonds formed at the expense of π bonds. The [4 + 2] cycloaddition, known as the Diels–Alder reaction, is the most common. The other example is a [2 + 2] cycloaddition.
2.5K
[3,3] Sigmatropic Rearrangement of 1,5-Dienes: Cope Rearrangement
2.6K
The Cope rearrangement is classified as a [3,3] sigmatropic shift in 1,5-dienes, leading to a more stable, isomeric 1,5-diene. The reaction involves a concerted movement of six electrons, four from two π bonds and two from a σ bond, via an energetically favorable chair-like transition state.
2.6K
Diels–Alder Reaction Forming Bridged Bicyclic Products: Stereochemistry
4.6K
Diels–Alder reactions between cyclic dienes locked in an s-cis configuration and dienophiles yield bridged bicyclic products.
4.6K
Thermal Electrocyclic Reactions: Stereochemistry
2.0K
The stereochemistry of electrocyclic reactions is strongly influenced by the orbital symmetry of the polyene HOMO. Under thermal conditions, the reaction proceeds via the ground-state HOMO.
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
2.0K


