使用骨修饰合成来自罗利丁的二烯
Haitao Qin1,2, Ting Guo1, Ken Lin1
1Institute of Chemistry and BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China.
Nature communications
|November 11, 2023
概括
研究人员开发了一种新方法,通过去除原子,将和的N-异环环罗利丁转化为线性烯. 这种新的骨改造策略为各种应用创造了新的化学空间.
科学领域:
- 有机化学 有机化学
- 合成化学 合成化学
- 药用化学 医学化学
背景情况:
- 和的N-异环型罗利丁是天然产品,药品和农业化学品中普遍存在的支架.
- 重建罗利丁骨以获取新型化学实体是由于有限的方法而具有合成挑战.
研究的目的:
- 开发一种新的骨修饰策略,用于pyrrolidines.
- 为了将极性循环皮罗利丁转化为非极性线性二烯.
- 通过N原子的去除和解构来探索新的化学空间.
主要方法:
- 罗利丁环的N原子去除和解构.
- N-硫酸化,然后重新排列硫酸中间体.
- C-C π 键的形成和 C-N 和 C-C σ 键的裂变.
主要成果:
- 成功地将pyrrolidines转化为具有不同链接长度的多功能结合和非结合dienes.
- 证明该方法在生物活性化合物的后期骨修饰中的适用性.
- 探索正式的无痕 C ((sp2) -H 功能化和 N 原子删除.
结论:
- 开发的方法提供了一种独特的方法,用于皮罗利丁的骨架修饰.
- 这一策略使人们能够访问各种线性天体,扩大合成的可能性.
- 该方法对药物发现和开发具有潜力,通过后期功能化.
相关概念视频
![[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2Ffiles%2Fmedia%2Fscience-education%2Fscience-education-thumbs%2F12417.jpg&w=3840&q=75)
01:16[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction
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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.
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01:28Diels–Alder Reaction Forming Cyclic Products: Stereochemistry
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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.
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01:29Diels–Alder Reaction Forming Bridged Bicyclic Products: Stereochemistry
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Diels–Alder reactions between cyclic dienes locked in an s-cis configuration and dienophiles yield bridged bicyclic products.
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01:29Diels–Alder Reaction: Characteristics of Dienes
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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...
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02:44Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
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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.
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01:24Diels–Alder Reaction: Characteristics of Dienophiles
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In a Diels–Alder reaction, the diene is usually an electron-rich system and acts as a nucleophile, whereas the dienophile is electron-deficient and functions as an electrophile. Much like the diene, the nature of the dienophile significantly impacts the outcome of the reaction.
Characteristics of Dienophiles
Generally, the best dienophiles are alkenes containing electron-withdrawing substituents such as carbonyl, nitrile, and nitro groups. The feasibility of a Diels–Alder reaction depends...
Characteristics of Dienophiles
Generally, the best dienophiles are alkenes containing electron-withdrawing substituents such as carbonyl, nitrile, and nitro groups. The feasibility of a Diels–Alder reaction depends...
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