使用N-Hydroxyphthalimide进行分子间激素介导的抗马尔科夫尼科夫氨化
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在PubMed上查看摘要
概括
此摘要是机器生成的。一种新方法使得使用酸乙烯和N-甲胺的多种基能产生抗马尔科夫尼科夫胺. 这种反应通过N-甲胺中间体提供了一种通往原始氨基的通道.
科学领域
- 有机化学
- 合成方法
背景情况
- 胺反应对于合成含化合物至关重要.
- 开发高效和选择性的分子间胺化方法仍然是一个挑战.
研究的目的
- 开发一种新的分子间抗马尔科夫尼科夫胺化.
- 建立一个通用的方法来获取初级氨基.
主要方法
- 使用三乙和N-甲作为关键试剂.
- 研究了各种基的反应范围,包括乙烯,基,硫化物和未激活的基.
- 使用机械探测器来阐明反应路径.
主要成果
- 成功实现了多种基的分子间抗马尔科夫尼科夫胺化.
- 证明了基基体内的多种功能组的耐受性.
- 展示了N-甲基胺产品易于转化为原始氨基.
- 鉴定了一种由酸盐促进的激素脱氧机制,
结论
- 开发了一种强大而通用的抗马尔科夫尼科夫水胺化方法.
- 这种方法为初级氨基的合成提供了有价值的途径.
- 机械学理解为酸盐介导的激进过程提供了洞察力.
相关概念视频
The reaction of hydrogen bromide with alkenes in the presence of hydroperoxides or peroxides proceeds via anti-Markovnikov addition. The radical chain reaction comprises initiation, propagation, and termination steps.
The mechanism starts with chain initiation, which involves two steps. In the first chain initiation step, a weak peroxide bond is homolytically cleaved upon mild heating to form two alkoxy radicals. In the second initiation step, a hydrogen atom is abstracted by the alkoxy...
The addition of hydrogen bromide to alkenes in the presence of hydroperoxides or peroxides proceeds via an anti-Markovnikov pathway and yields alkyl bromides.
The observed regioselectivity can be explained based on the radical stability and steric effect. From the radical stability perspective, adding hydrogen bromide in the presence of peroxide directs the bromine radical at the less substituted carbon via a more stable tertiary radical intermediate. Similarly, in the steric framework, the...
The anti-Markovnikov addition of hydrogen halides to an alkene is thermodynamically feasible only with HBr. The radical addition reaction with other hydrogen halides like HCl and HI is thermodynamically unfavorable.
Thermodynamic factors
The temperature influences the spontaneity of a reaction, which can be evaluated based on the change in the Gibbs free energy, ΔG. If the change in Gibbs free energy, ΔG, is negative, the reaction occurs spontaneously. As shown below, ΔG can be evaluated...
Radical reactions can occur either intermolecularly or intramolecularly. In an intermolecular radical reaction, a nucleophilic radical adds to an electrophilic alkene or vice versa. In such reactions, the radical and generally the alkene, which is also called the radical trap, are two different molecules. Additionally, for such intermolecular reactions to occur, the radical trap must be active, present in an excess concentration, and the radical starting material must have a weak...
If a set of reactants can yield multiple constitutional isomers, but one of the isomers is obtained as the major product, the reaction is said to be regioselective. In such reactions, bond formation or breaking is favored at one reaction site over others.
The hydrohalogenation of an unsymmetrical alkene can yield two haloalkane products, depending on which vinylic carbon takes up the halogen. However, one product usually predominates, where hydrogen adds to the vinylic carbon bearing the...
The formation of a solution is an example of a spontaneous process, a process that occurs under specified conditions without energy from some external source.
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Such a solution is called an ideal solution. A mixture of ideal gases (or gases such as helium and argon,...