开发一个阴离子级联尾随到Piancatelli重排的路径,以骨不同的多循环框架
Manveer Patel1, Chenna Jagadeesh1, Abhijit Nandy2
1Department of Biological and Synthetic Chemistry, Centre of Biomedical Research, Lucknow-226014, India.
Organic letters
|September 12, 2025
概括
这项研究展示了aza-Piancatelli重组,使用一种新的 furan 构建块. 该反应有效地合成了复杂的多环架,具有多个立体中心,由HFIP结集群驱动.
科学领域:
- 有机化学 有机化学
- 合成化学 合成化学
背景情况:
- 阿扎 - 皮安卡特利重组是从 furan 碳醇合成环二烯的关键方法.
- 开发新的合成路径,以复杂的多循环支架仍然是有机化学的一个重大挑战.
研究的目的:
- 为了证明在阿扎-皮安卡特利重新排列中非正规构建块的实用性.
- 将这种重新排列与以azaoxyallyl为中心的过程整合起来,用于构建复杂的分子架构.
- 为了突出一个快速的,以多样性为导向的环类架构的合成.
主要方法:
- 在阿扎-皮安卡特利重新排列中使用非正规的 furan 构建块.
- 将重新排列与以azaoxyallyl为中心的过程相结合.
- 采用六异醇 (HFIP) 的结集群作为唯一的促进剂.
主要成果:
- 成功合成了难以捉摸的多环架.
- 构建具有多个连续立体中心的分子.
- 展示快速和以多样性为导向的综合战略.
结论:
- 阿扎-皮安卡特利重新排列,当与非正规的 furan 构建块和一个 azaoxyallyl 阴离子过程相结合时,可以访问复杂的多环结构.
- HFIP作为这种转变的有效推动者,使高效的合成成为可能.
- 这种综合方法提供了一个强大的工具,用于以多样性为导向的 valuable cyclopentanoid 架构的合成.
相关概念视频
Cycloaddition Reactions: Overview
3.4K
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.
3.4K
Aromatic Hydrocarbon Cations: Structural Overview
3.6K
Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
Removing one hydrogen from the intervening CH2 group...
Removing one hydrogen from the intervening CH2 group...
3.6K
[3,3] Sigmatropic Rearrangement of 1,5-Dienes: Cope Rearrangement
3.4K
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.
3.4K
Preparation of 1° Amines: Hofmann and Curtius Rearrangement Mechanism
4.0K
The Hofmann and Curtius rearrangement reactions can be applied to synthesize primary amines from carboxylic acid derivatives such as amides and acyl azides. In the Hofmann rearrangement, a primary amide undergoes deprotonation in the presence of a base, followed by halogenation to generate an N-haloamide. A second proton abstraction produces a stabilized anionic species, which rearranges to an isocyanate intermediate via an alkyl group migration from the carbonyl carbon to the neighboring...
4.0K
Preparation of 1° Amines: Hofmann and Curtius Rearrangement Overview
3.6K
In the presence of an aqueous base and a halogen, primary amides can lose the carbonyl (as carbon dioxide) and undergo rearrangement to form primary amines. This reaction, called the Hofmann rearrangement, can produce primary amines (aryl and alkyl) in high yields without contamination by secondary and tertiary amines.
3.6K
Pericyclic Reactions: Introduction
9.7K
Pericyclic reactions are organic reactions that occur via a concerted mechanism without generating any intermediates. The reactions proceed through the movement of electrons in a closed loop to form a cyclic transition state, where rearrangement of the σ and π bonds yields specific products.
Pericyclic reactions can be classified into three categories: electrocyclic reactions, cycloaddition reactions, and sigmatropic rearrangements. Electrocyclic reactions and sigmatropic...
Pericyclic reactions can be classified into three categories: electrocyclic reactions, cycloaddition reactions, and sigmatropic rearrangements. Electrocyclic reactions and sigmatropic...
9.7K

![Solid-phase Synthesis of [4.4] Spirocyclic Oximes](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F58508.jpg&w=3840&q=50)
