电化学脱sp2 - - 纳醇的合反应,获得一个多环纳氨酸基因
Julian Buchholz1, Elisabeth K Oehl2, Maximilian M Hielscher2
1Max-Planck-Institute for Chemical Energy Conversion, Stiftstraße 34-36, 45470 Mülheim an der Ruhr, Germany.
Organic letters
|December 10, 2024
概括
使用纳醇的电化学合成产生了一种新型的多环纳氨酸基因. 这种由溶剂控制的过程,利用流电解,产生具有潜在生物活性的复杂结构.
科学领域:
- 有机化学 有机化学
- 电化学 电化学 电化学
- 合成方法论 合成方法论
背景情况:
- 纳夫索是有机合成中的多功能起始材料.
- 电化学方法为复杂分子构造提供了可持续的途径.
- 多环甲是生物活性天然产品中发现的支架.
研究的目的:
- 开发一种用于多环纳基基因的新型电化学合成方法.
- 在循环化反应中探索溶剂对二聚体选择性的溶剂效应.
- 为潜在的生物活性查合成和表征新衍生物.
主要方法:
- 从醇中进行电化学合成.
- 溶剂控制的二聚体选择性循环.
- 通过流电解进行阳极脱化sp2合.
主要成果:
- 一种新型的多环甲基基基因被成功合成.
- 循环表现出高的二聚体选择性,受溶剂效应的影响.
- 使用流电解,制备了10种衍生品,产量高达88%.
- 合成的化合物在结构上与已知的生物活性分子相似.
结论:
- 已经建立了一种新的,高效的电化学方法来构建多环甲.
- 这些发现强调了溶剂效应在控制立体化学中的作用.
- 合成的衍生品代表着探索新生物活性化合物的有希望的候选人.
![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)
相关概念视频
01:26Thermal and Photochemical Electrocyclic Reactions: Overview
2.3K
Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
2.3K
01:26Photochemical Electrocyclic Reactions: Stereochemistry
1.8K
The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
Selection Rules: Photochemical Activation
1.8K
01:27Vicinal Diols via Reductive Coupling of Aldehydes or Ketones: Pinacol Coupling Overview
1.7K
Wilhelm Rudolph Fittig discovered the pinacol coupling reaction in 1859. It is a radical dimerization reaction and involves the reductive coupling of aldehydes or ketones in the presence of hydrocarbon solvent to yield vicinal diols.
1.7K
01:17Thermal Electrocyclic Reactions: Stereochemistry
2.0K
The stereochemistry of electrocyclic reactions is strongly influenced by the orbital symmetry of the polyene HOMO. Under thermal conditions, the reaction proceeds via the ground-state HOMO.
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
2.0K
01:11Aryldiazonium Salts to Azo Dyes: Diazo Coupling
2.9K
The reaction of weakly electrophilic aryldiazonium (also called arenediazonium) salts with highly activated aromatic compounds leads to the formation of products with an —N=N— link, called an azo linkage. This reaction, presented in Figure 1, is known as diazo coupling and occurs without the loss of the nitrogen atoms of the aryldiazonium salt. Highly activated aromatic compounds such as phenols or arylamines favor the diazo coupling reaction. The coupling generally occurs at the...
2.9K
01:16Cycloaddition Reactions: Overview
2.5K
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.
2.5K