环开放/Friedel-Crafts 基环坦流向纳夫他林
Liyan Fu1, Min Zhang1, Xiaofei Zhu1
1Department of Chemistry, Jilin Provincial Key Laboratory of Carbon Fiber Development and Application, College of Chemistry and Life Science, Changchun University of Technology, Changchun 130012, P. R. China.
The Journal of organic chemistry
|February 12, 2026
概括
一种新型的铜催化反应有效地将循环butanones转化为多替代纳. 这种方法采用温和的条件,为复杂的芳香化合物提供了一条新的合成途径.
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:
- 循环布坦是具有独特反应性的紧张循环.
- 在有机合成中,开发高效的合成途径以获得多替代性纳素仍然是有机合成的一个关键挑战.
研究的目的:
- 为开发一种新型的铜催化分子内环开放/Friedel-Crafts反应的循环butanones.
- 在温和和高效的条件下合成多替代纳.
主要方法:
- 铜催化反应涉及循环butanones的选择性C-C键裂变.
- 在现场生成和捕获zwitterionic中间体.
- 基质和反应条件的优化.
主要成果:
- 实现了新型的环内分子开放/Friedel-Crafts反应的循环butanones.
- 合成了多种多替代的纳烯,产量高达99%.
- 与3 - 和3 - 基循环布坦前体均表现出兼容性.
结论:
- 开发的铜催化策略提供了一条前所未有的,高效的通往多替代纳的途径.
- 反应在温和条件下进行,避免敏感的易斯酸,并仅产生水作为副产品.
- 通过合成和转化反应中间体,验证了催化途径.
相关概念视频
Limitations of Friedel–Crafts Reactions
7.0K
Several restrictions limit the use of Friedel–Crafts reactions. First, the halogen in the alkyl halide must be attached to an sp3-hybridized carbon for the Friedel–Crafts reactions to occur. Vinyl or aryl halides do not react since the carbocations formed are unstable under the reaction conditions. Second, Friedel–Crafts alkylation is susceptible to carbocation rearrangement, and the major products obtained have a rearranged carbon skeleton. In contrast, the acylium ion is...
7.0K
Electrophilic Aromatic Substitution: Friedel–Crafts Alkylation of Benzene
8.3K
Friedel–Crafts reactions were developed in 1877 by the French chemist Charles Friedel and the American chemist James Crafts. Friedel–Crafts alkylation refers to the replacement of an aromatic proton with an alkyl group via electrophilic aromatic substitution. A Lewis acid catalyst such as aluminum chloride reacts with an alkyl halide to form a carbocation. The resulting carbocation then reacts with the aromatic ring and undergoes a series of electron rearrangements before giving the final...
8.3K
Electrophilic Aromatic Substitution: Friedel–Crafts Acylation of Benzene
9.0K
The Friedel–Crafts acylation reactions involve the addition of an acyl group to an aromatic ring. These reactions proceed via electrophilic aromatic substitution by employing an acyl chloride and a Lewis acid catalyst such as aluminum chloride to form aryl ketone.
9.0K
Intracellular Signaling Cascades
53.7K
Once a ligand binds to a receptor, the signal is transmitted through the membrane and into the cytoplasm. The continuation of a signal in this manner is called signal transduction. Signal transduction only occurs with cell-surface receptors, which cannot interact with most components of the cell, such as DNA. Only internal receptors can interact directly with DNA in the nucleus to initiate protein synthesis. When a ligand binds to its receptor, conformational changes occur that affect the...
53.7K
Rab Cascades
3.6K
Rab GTPases act in a regulated cascade during membrane fusion, helping the lipid bilayers mix. The Rab family of proteins are active when bound to GTP, and inactive when bound to GDP. Hence, they act as guanine nucleotide-dependent molecular switches. Rab-GTP recognizes and binds to long or short-range tethering proteins to capture the target vesicle. These tethers coordinate with SNAREs on the vesicle and the target membrane to assemble the trans SNARE complex that locks the mixing bilayers.
3.6K
Amplifying Signals via Enzymatic Cascade
18.6K
When a ligand binds to a cell-surface receptor, the receptor's intracellular domain changes shape, which may either activate its enzyme function or allow its binding to other molecules. The initial signal is amplified by most signal transduction pathways. This means that a single ligand molecule can activate multiple molecules of a downstream target. Proteins that relay a signal are most commonly phosphorylated at one or more sites, activating or inactivating the protein. Kinases catalyze...
18.6K


