作为臭氧溶解的AZA版本的烯三解
Aleksandr Koronatov1, Pavel Sakharov1, Deepak Ranolia1
1Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Technion City, Israel.
Nature chemistry
|October 11, 2024
概括
研究人员开发了三解,这是一种新的方法,通过裂解碳-碳双键,将基转化为有价值的氨基. 这一突破为合成含化合物提供了一条新的途径,解决了有机化学中长期存在的挑战.
科学领域:
- 有机化学 有机化学
- 合成方法论 合成方法论
- 催化剂是一种催化剂.
背景情况:
- 基是有机合成中的多功能构建块.
- 臭氧溶解裂解C=C键,形成含氧化合物.
- 形成C-N债券的C=C债券裂变的aza-analogs是不发达的.
研究的目的:
- 开发一种新的方法,用于基的aza-cleavage.
- 通过C=C键断开连接,从基中合成有价值的氨基.
- 建立一种名为"三解"的新合成转化.
主要方法:
- 在三二烯酸和基之间发生A (3+2) 循环添加反应.
- 使用化减少中间化盐.
- 易斯酸催化剂以促进反应.
主要成果:
- 通过完全C=C键断开,成功地将基因转化为氨基.
- 适用于循环基,产生二胺.
- 从非循环基生成两个独立的氨基单元.
结论:
- 三解是一种新的,有效的方法,用于从基中合成氨基.
- 反应机制涉及循环添加,化物转移和分解.
- 易斯酸催化在反应效率方面发挥着重要作用.
相关概念视频
Oxidative Cleavage of Alkenes: Ozonolysis
10.0K
In ozonolysis, ozone is used to cleave a carbon–carbon double bond to form aldehydes and ketones, or carboxylic acids, depending on the work-up.
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
10.0K
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
Alkynes to Carboxylic Acids: Oxidative Cleavage
4.9K
Alkynes undergo oxidative cleavage in the presence of oxidizing reagents like potassium permanganate and ozone. The triple bond — one σ bond and two π bonds — is completely cleaved, and the alkyne is oxidized to carboxylic acids. When warm and basic aqueous potassium permanganate is used as an oxidizing agent, alkynes are first converted to carboxylate salts via an unstable α-diketone intermediate. Further, a mild acid treatment protonates the carboxylate anions...
4.9K
Amines to Alkenes: Hofmann Elimination
2.5K
Alkenes can be obtained from amines via an E2 elimination. The amine is first converted into a good leaving group, such as a quaternary ammonium salt. This is accomplished by treating the amine with an excess of alkyl halide, which results in a halide salt. Next, the halide salt is transformed into a hydroxide salt that functions as a base to enable elimination.
Under thermal conditions, the hydroxide can abstract a proton from the β carbon; this generates an alkene with the simultaneous...
Under thermal conditions, the hydroxide can abstract a proton from the β carbon; this generates an alkene with the simultaneous...
2.5K
Preparation of Epoxides
7.5K
Overview
Epoxides result from alkene oxidation, which can be achieved by a) air, b) peroxy acids, c) hypochlorous acids, and d) halohydrin cyclization.
Epoxidation with Peroxy Acids
Epoxidation of alkenes via oxidation with peroxy acids involves the conversion of a carbon–carbon double bond to an epoxide using the oxidizing agent meta-chloroperoxybenzoic acid, commonly known as MCPBA. Since the O–O bond of peroxy acids is very weak, the addition of electrophilic oxygen of...
Epoxides result from alkene oxidation, which can be achieved by a) air, b) peroxy acids, c) hypochlorous acids, and d) halohydrin cyclization.
Epoxidation with Peroxy Acids
Epoxidation of alkenes via oxidation with peroxy acids involves the conversion of a carbon–carbon double bond to an epoxide using the oxidizing agent meta-chloroperoxybenzoic acid, commonly known as MCPBA. Since the O–O bond of peroxy acids is very weak, the addition of electrophilic oxygen of...
7.5K
Hydroboration-Oxidation of Alkenes
7.9K
In addition to the oxymercuration–demercuration method, which converts the alkenes to alcohols with Markovnikov orientation, a complementary hydroboration-oxidation method yields the anti-Markovnikov product. The hydroboration reaction, discovered in 1959 by H.C. Brown, involves the addition of a B–H bond of borane to an alkene giving an organoborane intermediate. The oxidation of this intermediate with basic hydrogen peroxide forms an alcohol.
7.9K


![Cercosporin-Photocatalyzed [4+1]- and [4+2]-Annulations of Azoalkenes Under Mild Conditions](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F60786.jpg&w=3840&q=50)