高选择性C-H功能化/乙二甲的化
Xiaobing Wan1, Zhongxun Ma, Bijie Li
1Beijing National Laboratory for Molecular Sciences, Peking University, Beijing 100871, China.
Journal of the American Chemical Society
|June 8, 2006
概括
这项研究引入了一种新的方法,用于区域选择性C-H功能化和乙二化物的化. 和铜催化剂有效地使用铜化物作为素源产生正氧酸乙化物.
科学领域:
- 有机化学 有机化学
- 催化剂是一种催化剂.
- 化物化 化物化
背景情况:
- C-H功能化是有机合成的一个关键策略.
- 芳香化合物的区域选择性化具有合成价值.
- 乙乙化物是药品和材料中常见的结构图案.
研究的目的:
- 开发一种高度区域选择性的方法,用于对乙基化物进行正态化.
- 探索和铜催化剂在C-H功能化反应中的使用.
- 为了确定转换的高效素来源.
主要方法:
- 该反应使用乙酸 (Pd) 和铜乙酸 (Cu) 作为催化剂.
- 铜化物 (CuX2) 作为素源.
- 乙乙化物在正位置经历直接的C-H功能化.
主要成果:
- 催化系统表现出高区域选择性用于正形化.
- 这种反应有效地产生了一系列的正极酸乙化物.
- 该方法提供了一条直接通往有价值的化中间体的途径.
结论:
- 这项工作介绍了一种有效的/铜催化方法,用于对乙化的区域选择性C-H化.
- 开发的协议提供了直接访问的ortho-haloacetanilides.
- 这些发现有助于在有机合成中推进C-H功能化策略.
相关概念视频
02:08Introduction to Functional Groups
Functional groups are group of atoms with specific chemical properties that occur within organic molecules and sometimes denoted as “R”. Functional groups are found along the carbon backbone of macromolecules can form chains or rings of carbon atoms. Functional groups can “functionalize” a compound by enabling it to adopt different physical and chemical properties.
Types of common functional groups
The table below summarizes some of the major functional groups in organic chemistry. (The...
02:22Overview of Advanced Functional Groups
Functional groups are groups of atoms with specific chemical properties that occur within organic molecules and are sometimes denoted as “R”. Functional groups can “functionalize” a compound by enabling it to adopt different physical and chemical properties.
Types of Advanced Functional Groups
The table below summarizes some of the major functional groups in organic chemistry.
02:10Carbocations
Carbocations are one of the reaction intermediates formed during several nucleophilic substitutions or elimination reactions. A carbocation is an electron-deficient species with the central carbon atom having six electrons and three bonded atoms. The central carbon in a carbocation is sp2 hybridized with trigonal planar geometry. It has an empty p orbital perpendicular to the plane of the structure that can accept electrons. Thus, carbocations act as strong electrophiles and may react with any...
01:23Properties of Organometallic Compounds
Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.
01:10C–C Bond Formation: Aldol Condensation Overview
Aldol condensation is an important route in synthetic organic chemistry used to generate a new carbon–carbon bond under basic or acidic conditions. The aldol condensation reaction presented in Figure 1 constitutes an aldol addition reaction followed by the dehydration process.
00:57C–C Bond Cleavage: Retro-Aldol Reaction
The reverse of the aldol addition reaction is called the retro-aldol reaction. Here, the carbon–carbon bond in the aldol product is cleaved under acidic or basic conditions to form two molecules of carbonyl compounds. The mechanism of the reaction consists of three steps.
In the first step, as depicted in Figure 1, the base deprotonates the β-hydroxy ketone at the hydroxyl group to form an alkoxide ion.
In the first step, as depicted in Figure 1, the base deprotonates the β-hydroxy ketone at the hydroxyl group to form an alkoxide ion.