相关实验视频
Updated: Jul 11, 2026
12:06
Synthesis of High Purity Nonsymmetric Dialkylphosphinic Acid Extractants
Published on: October 19, 2017
催化合的propargy醇和基烯酸的合
Michael R Luzung1, F Dean Toste
1Center for New Directions in Organic Synthesis, Department of Chemistry, University of California, Berkeley, California 94720, USA.
Journal of the American Chemical Society
|December 18, 2003
概括
这项研究引入了一种温和的催化方法,用于合propargyl醇和allylsilanes,有效地形成新的碳-碳键. 氧催化剂可重复使用,并耐受多种功能组,使复杂分子合成成为可能.
科学领域:
- 有机金属化学 有机金属化学
- 有机合成 有机合成
- 催化剂是一种催化剂.
背景情况:
- 形成sp3-碳-sp3键的传统方法通常需要恶劣的条件或基质的预激活.
- 开发轻度和区域选择性合反应对于复杂有机分子的高效合成至关重要.
- 氧复合物由于其稳定性和反应性,具有独特的催化性能.
研究的目的:
- 开发一种温和和区域选择性方法,用于合propargyl醇和allylsilanes.
- 利用稳定且可重复使用的氧复合物作为C-C键形成的催化剂.
- 证明开发方法在不对称合成和天然产品合成中的实用性.
主要方法:
- 采用耐空气和耐潮湿的氧复合物, (dppm) ReOCl3,作为催化剂.
- 在温和的反应条件下,将甲基醇与甲基合在一起.
- 使用enantiopurecrotylsilanes进行相邻立体中心的不对称合成.
主要成果:
- 在没有基质预激活的情况下实现了sp3-碳-sp3-碳键的区域选择性形成.
- 已证明具有广泛的功能组耐受性,包括烯化物,烯酸,和乙.
- 即使在其他电友的存在下,也展示了酒精部分的优先排位.
- 成功合成了一种delta-lactone,di-O-methylcalopin,展示了该方法的潜力.
结论:
- 开发的催化方法为C-C键形成提供了温和,高效和区域选择性途径.
- 催化剂的稳定性使其易于回收和重复使用,提高了其实际适用性.
- 反应对各种功能组的耐受性及其在不对称合成中的实用性在有机化学中开辟了新的途径.
相关概念视频
02:45Acid-Catalyzed Hydration of Alkenes
Alkenes react with water in the presence of an acid to form an alcohol. In the absence of acid, hydration of alkenes does not occur at a significant rate, and the acid is not consumed in the reaction. Therefore, alkene hydration is an acid-catalyzed reaction.
02:40Alkynes to Aldehydes and Ketones: Acid-Catalyzed Hydration
Introduction
Analogous to alkenes, alkynes also undergo acid-catalyzed hydration. While the addition of water to an alkene gives an alcohol, hydration of alkynes produces different products such as aldehydes and ketones.
Analogous to alkenes, alkynes also undergo acid-catalyzed hydration. While the addition of water to an alkene gives an alcohol, hydration of alkynes produces different products such as aldehydes and ketones.
01:12Acid Halides to Esters: Alcoholysis
Alcoholysis is a nucleophilic acyl substitution reaction in which an alcohol functions as a nucleophile. Acid halides react with alcohol to produce esters. The mechanism proceeds in three steps:
01:08Nitriles to Carboxylic Acids: Hydrolysis
Nitriles undergo acid-catalyzed hydrolysis or base-catalyzed hydrolysis to form a carboxylic acid. These reactions proceed via an amide intermediate.
00:57Nitriles to Ketones: Grignard Reaction
Organomagnesium halides, commonly known as Grignard reagents, convert nitriles to ketones and proceed through a nucleophilic acyl substitution. Nitriles react with a Grignard reagent, followed by an aqueous acid, to yield ketones. The reaction introduces a new carbon–carbon bond. The alkyl–magnesium bond in the Grignard reagent is highly polar, so the alkyl carbon develops a carbanionic character and acts as a nucleophile.
The mechanism begins with a nucleophilic attack by the Grignard reagent...
The mechanism begins with a nucleophilic attack by the Grignard reagent...
01:15Acid-Catalyzed Aldol Addition Reaction
The aldol reaction of a ketone under acidic conditions successfully forms an unsaturated carbonyl as the final product instead of an aldol. The acid-catalyzed aldol reaction is depicted in Figure 1.