使用适应性动态同质催化反应的一般交叉合反应
Indrajit Ghosh1, Nikita Shlapakov2,3, Tobias A Karl2
1Fakultät für Chemie und Pharmazie, Universität Regensburg, Regensburg, Germany. Indrajit1.Ghosh@chemie.uni-regensburg.de.
Nature
|June 14, 2023
概括
这项研究引入了适应性动态同质催化 (AD-HoC) 使用用于多功能C(sp2) 异构原子交叉合反应. 这种自我调整系统简化了多种核友和键形成的反应优化.
科学领域:
- 有机化学
- 催化剂
- 合成方法
背景情况:
- 交叉合反应在有机合成中至关重要,但通常需要具体的个别优化.
- 现有的 (乙) 化物和核结合方法各不相同,但缺乏通用性.
- 反应条件的变化需要针对不同类型的化合物进行频繁的再优化.
研究的目的:
- 开发一种通用且适应性强的催化系统,用于C (sp2) - (hetero) 原子交叉合反应.
- 在可见光驱动的氧化还原条件下使用进行自适应动态同质催化 (AD-HoC).
- 简化与各种核友的交叉合反应的分类和执行.
主要方法:
- 使用催化适应动态同质催化剂 (AD-HoC).
- 使用可见光驱动的氧化还原反应条件.
- 通过变化的核友和可选的氨基基体来证明适应性.
主要成果:
- 通过自调节的催化系统实现了一般的C(sp2) - ((hetero) 原子合反应.
- 已经成功地分类了几十种核爱类的交叉合.
- 合成证明了九种不同的结合反应 (C-S,C-Se,C-N,C-P,C-B,C-O,C-C,C-Si,C-Cl) 和许多例子.
- 可以适应不同核友的可预测反应条件.
结论:
- AD-HoC为广泛的交叉合反应提供了通用和可预测的平台.
- 催化剂的自调性质简化了合成策略和优化.
- 这种方法扩大了有机合成中高效的C(sp2) - ((hetero) 原子结合的范围.
相关概念视频
Catalysis
27.1K
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
27.1K
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
3.4K
Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
3.4K
Crossed Aldol Reactions: Overview
5.5K
Crossed aldol addition is the reaction between two different carbonyl compounds under acidic or basic conditions. Here, both the carbonyl compounds function as nucleophiles and electrophiles. As shown in Figure 1, such a reaction yields a mixture of products, two of which are formed via self-condensation, while the remaining two are formed via crossed-condensation. Without adjustment, the reaction's usefulness in organic chemistry is decreased.
5.5K
Cycloaddition Reactions: Overview
2.7K
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.
2.7K
Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)
2.0K
Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
2.0K
Cycloaddition Reactions: MO Requirements for Thermal Activation
3.6K
Thermal cycloadditions are reactions where the source of activation energy needed to initiate the reaction is provided in the form of heat. A typical example of a thermally-allowed cycloaddition is the Diels–Alder reaction, which is a [4 + 2] cycloaddition. In contrast, a [2 + 2] cycloaddition is thermally forbidden.
3.6K
![Mizoroki-Heck Cross-coupling Reactions Catalyzed by Dichloro{bis[1,1',1''-phosphinetriyltripiperidine]}palladium Under Mild Reaction Conditions](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F51444.jpg&w=3840&q=50)

