在双相系统中,酸盐离子对催化了乙烯硫的合化
Siyu Jiang1, Yicen Ge1, Ai Zhang1
1College of Materials, Chemistry and Chemical Engineering, Chengdu University of Technology, Chengdu, Sichuan 610059, China. geyicen@cdut.edu.cn.
Organic & biomolecular chemistry
|March 19, 2025
概括
这项研究引入了一种新方法,用于合成β-硫醇,使用乙烯基硫的合玻利化. 这种离子配对技术有效地创造了多样化的,功能化的分子.
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:
- 乙烯基硫是多功能合成前体.
- 合玻里化是有机合成中的一个关键转化.
- 对合成功能性酒精的高效方法有需求.
研究的目的:
- 开发一种新型的乙烯基硫的合玻利化.
- 为了实现β-硫醇的高效合成.
- 探索潜在的反应机制.
主要方法:
- 通过离子配对介导的乙烯基硫的结合化.
- 用铜催化反应.
- 机械学研究包括动力学分析.
主要成果:
- 实现了各种β-硫醇的高效合成 (13-98%的产量).
- 证明了离子配对在中介反应中的有效性.
- 识别了负责加速的阳离子玻利铜中间体.
结论:
- 开发的方法为获得有价值的β-硫醇提供了一个简单的途径.
- 离子配对在提高反应速率和效率方面发挥着至关重要的作用.
- 机械洞察力揭示了涉及离子玻利铜物种的催化循环.
相关概念视频
02:36Regioselectivity and Stereochemistry of Hydroboration
8.0K
A significant aspect of hydroboration–oxidation is the regio- and stereochemical outcome of the reaction.
Hydroboration proceeds in a concerted fashion with the attack of borane on the π bond, giving a cyclic four-centered transition state. The –BH2 group is bonded to the less substituted carbon and –H to the more substituted carbon. The concerted nature requires the simultaneous addition of –H and –BH2 across the same face of the alkene giving syn...
Hydroboration proceeds in a concerted fashion with the attack of borane on the π bond, giving a cyclic four-centered transition state. The –BH2 group is bonded to the less substituted carbon and –H to the more substituted carbon. The concerted nature requires the simultaneous addition of –H and –BH2 across the same face of the alkene giving syn...
8.0K
01:01Acid Halides to Carboxylic Acids: Hydrolysis
2.5K
Hydrolysis of acid halides is a nucleophilic acyl substitution reaction in which acid halides react with water to give carboxylic acids. The reaction occurs readily and does not require acid or a base catalyst.
As shown below, the mechanism involves a nucleophilic attack by water at the carbonyl carbon to form a tetrahedral intermediate. This is followed by the reformation of the carbonâÃÂÃÂoxygen ÃÂàbond along with the departure of a halide ion. A final proton...
As shown below, the mechanism involves a nucleophilic attack by water at the carbonyl carbon to form a tetrahedral intermediate. This is followed by the reformation of the carbonâÃÂÃÂoxygen ÃÂàbond along with the departure of a halide ion. A final proton...
2.5K
03:08Hydroboration-Oxidation of Alkenes
7.7K
In addition to the oxymercurationâÃÂÃÂdemercuration 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 BâÃÂÃÂH bond of borane to an alkene giving an organoborane intermediate. The oxidation of this intermediate with basic hydrogen peroxide forms an alcohol.
7.7K
01:12Acid Halides to Esters: Alcoholysis
2.7K
Alcoholysis is a nucleophilic acyl substitution reaction in which an alcohol functions as a nucleophile. Acid halides react with alcohol to produce esters. The mechanism proceeds in three steps:
2.7K
01:22Reactions of Aldehydes and Ketones: Baeyer–Villiger Oxidation
3.8K
Baeyer–Villiger oxidation converts aldehydes to carboxylic acids and ketones to esters. The reaction uses peroxy acids or peracids and is often catalyzed by acid. The reaction is named after its pioneers, Adolf von Baeyer and Victor Villiger. The reaction is achieved by a wide range of peracids such as m-chloroperoxybenzoic acid (mCPBA), perbenzoic acid (C6H5COOOH), peracetic acid (CH3COOOH), hydrogen peroxide (H2O2), and tert-butyl hydroperoxide (t-BuOOH).
The carbonyl center is...
The carbonyl center is...
3.8K
01:15α-Bromination of Carboxylic Acids: Hell–Volhard–Zelinski Reaction
2.9K
The method to achieve α-brominated carboxylic acids using a mixture of phosphorus tribromide and bromine is known as the Hell–Volhard–Zelinski reaction. The reaction is catalyzed by phosphorus tribromide, which can be used directly or produced in situ from red phosphorus and bromine. The mechanism comprises PBr3 catalyzed conversion of acid to acid bromide and hydrogen bromide. The acid bromide enolizes to its enol form in the presence of HBr. The nucleophilic enol attacks the...
2.9K