两个芳香型环胺的酶选择性总合成
Zackary D Firestone1, Thiago A Grigolo1, Filipe G Pernichelle1
1Laboratories of Molecular Recognition, Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, Florida 32306, United States.
Journal of the American Chemical Society
|February 13, 2026
概括
研究人员报告了首次不对称的海洋类化合物 (+) - 四氧化二甲胺B和 (-) - - 四氧化二甲胺B的合成. 这种10步的方法使得以前无法获得的受控立体化学成为可能.
科学领域:
- 有机化学 有机化学
- 自然产品的合成自然产品的合成
- 药用化学 医学化学
背景情况:
- 海洋类化合物,如四基基胺B,具有具有潜在生物活动的复杂结构.
- 之前的合成努力未能实现这些化合物的不对称合成或受控立体化学.
研究的目的:
- 披露 (+) - 四甲基基胺B和 (-) - 基基胺B的简洁和不同的合成途径.
- 建立这些海洋天然产品的第一个报告的不对称合成.
- 为了使具有挑战性的 * 跨 * 立体化学关系在 piperidine 环中得到控制的组装.
主要方法:
- 用10步合成序列为每个目标分子.
- 关键的转化包括酶选择性有机催化迈克尔添加和宏环性aza-Wittig结合.
- 在核心框架组件中采用试剂控制的立体分离乳减少剂.
主要成果:
- 成功合成了 (+) -四基基胺B和 (-) -epi-四基基胺B.
- 实现了这些海洋类化合物的第一个不对称合成.
- 建立了一种用于*trans* piperidine立体化学的受控合成方法,此前无法实现.
结论:
- 开发的合成策略是高效的,并提供了关键的海洋化物.
- 这项工作克服了先前在合成B. tetradehydrohalicyclamine的特定立体异构体方面的局限性.
- 使用高氧化起始材料简化了合成,避免了复杂的功能组操纵.
相关概念视频
01:14Nucleophilic Aromatic Substitution of Aryldiazonium Salts: Aromatic SN1
2.8K
Treating arylamines with nitrous acid gives aryldiazonium salts that are effective substrates in nucleophilic aromatic substitution reactions. The diazonio group in these salts can be easily displaced by different nucleophiles, yielding a wide variety of substituted benzenes. The leaving group departs as nitrogen gas, and this easy elimination is the driving force for the substitution reaction.
In the Sandmeyer reaction, for example, the diazonio group is replaced by a chloro, bromo,...
In the Sandmeyer reaction, for example, the diazonio group is replaced by a chloro, bromo,...
2.8K
01:15Dehydration Synthesis
150.5K
Overview
Dehydration synthesis (also called a condensation reaction) is the chemical process in which two molecules covalently link together to form a new molecule, along with the release of a water molecule. Many physiologically important compounds form by dehydration synthesis reactions, such as complex carbohydrates, proteins, DNA, and RNA.
Synthesis of carbohydrates
Sugar molecules are covalently linked together by dehydration synthesis. During the reaction, the hydroxyl (-OH) group from...
Dehydration synthesis (also called a condensation reaction) is the chemical process in which two molecules covalently link together to form a new molecule, along with the release of a water molecule. Many physiologically important compounds form by dehydration synthesis reactions, such as complex carbohydrates, proteins, DNA, and RNA.
Synthesis of carbohydrates
Sugar molecules are covalently linked together by dehydration synthesis. During the reaction, the hydroxyl (-OH) group from...
150.5K
02:17Synthesis and Decomposition Reactions
38.4K
Synthesis and decomposition are two types of redox reactions. Synthesis means to make something, whereas decomposition means to break something. The reactions are accompanied by chemical and energy changes.
38.4K
01:25Aromatic Compounds: Overview
14.4K
In general, the term ‘aromatic’ indicates a pleasant smell or fragrance from fresh flowers, freshly prepared coffee, etc. In the early history of organic chemistry, many benzene derivatives were isolated from the pleasant odor oils of the plants. For example, vanillin was isolated from the oil of vanilla, methyl salicylate from the oil of wintergreen, and cinnamaldehyde from the oil of cinnamon. They all had a pleasant odor; hence the name aromatic was given.
In 1825, Faraday isolated...
In 1825, Faraday isolated...
14.4K
01:18Basicity of Aromatic Amines
8.1K
The basicity of aromatic amines is much weaker than that of aliphatic amines due to the involvement of the lone pair of electrons over the N atom in resonance with the aryl rings. Generally, the electron-donating ability of any substituents on the aryl ring of aromatic amines increases the basicity of the amine by increasing electron density, and hence the availability of lone pair on the nitrogen. On the other hand, electron-withdrawing functional groups on the aryl ring of amines decrease the...
8.1K
01:59Lagging Strand Synthesis
61.5K
During replication, the complementary strands in double-stranded DNA are synthesized at different rates. Replication first begins on the leading strand. Replication starts later, occurs more slowly, and proceeds discontinuously on the lagging strand.
There are several major differences between synthesis of the leading strand and synthesis of the lagging strand. 1) Leading strand synthesis happens in the direction of replication fork opening, whereas lagging strand synthesis happens in the...
There are several major differences between synthesis of the leading strand and synthesis of the lagging strand. 1) Leading strand synthesis happens in the direction of replication fork opening, whereas lagging strand synthesis happens in the...
61.5K