通过区域控制的C(2) -H功能化在竞技场内精确安装silyl合成手柄
Jamie H Docherty1,2, Mishra Deepak Hareram1, Luke M Nichols1
1Department of Chemistry, University of Manchester, Manchester, UK.
概括
催化C(sp2)-H基甲基化使的区域选择性功能化成为可能. 这种方法引入了用于合成复杂分子的多功能西甲基,包括像losmapimod这样的药品.
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:
- 站点选择性C(sp2) -H键功能化对于合成各种有机化合物至关重要.
- 为区域选择性功能化开发高效的催化方法仍然是有机合成的一个关键挑战.
研究的目的:
- 报告高效的区域选择性催化方法,用于使用的C(sp2) -H基甲基化.
- 为了在以N为基础的定向组的竞技场的ortho和meta位置上实现选择性功能化.
主要方法:
- 催化C ((sp2) -H的基甲基化.
- 使用基于N的指导小组进行区域控制.
- 使用偏磁性NMR实验研究了机械方面的研究.
主要成果:
- 实现了高效和区域选择性的基三甲基西兰基的形成.
- 在整形和元位置均表现出选择性功能化.
- 展示了由此产生的甲基化合物的多种变化.
结论:
- 开发了新型的催化协议,用于C ((sp2) -H甲基化.
- 该方法允许对复杂分子合成 (包括药品) 进行不同区域安装西甲基手柄.
- 机械学研究揭示了二环金属化 (II) 和 (III) 中间体的作用.
相关概念视频
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
3.2K
Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
3.2K
Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation
7.5K
Introduction
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
7.5K
Olefin Metathesis Polymerization: Overview
2.0K
Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists...
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists...
2.0K
Diels–Alder Reaction Forming Cyclic Products: Stereochemistry
3.7K
The Diels–Alder reaction is one of the robust methods for synthesizing unsaturated six-membered rings. The reaction involves a concerted cyclic movement of six π electrons: four π electrons from the diene and two π electrons from the dienophile.
3.7K
Preparation of Alkynes: Alkylation Reaction
9.7K
Introduction
Alkylation of terminal alkynes with primary alkyl halides in the presence of a strong base like sodium amide is one of the common methods for the synthesis of longer carbon-chain alkynes. For example, treatment of 1-propyne with sodium amide followed by reaction with ethyl bromide yields 2-pentyne.
Alkylation of terminal alkynes with primary alkyl halides in the presence of a strong base like sodium amide is one of the common methods for the synthesis of longer carbon-chain alkynes. For example, treatment of 1-propyne with sodium amide followed by reaction with ethyl bromide yields 2-pentyne.
9.7K
Regioselectivity and Stereochemistry of Acid-Catalyzed Hydration
8.2K
The rate of acid-catalyzed hydration of alkenes depends on the alkene's structure, as the presence of alkyl substituents at the double bond can significantly influence the rate.
8.2K


