Epoxidation of Alkenes (mCPBA)

R2C=CR2 + mCPBA → epoxide + mCBA

概述

Meta-chloroperoxybenzoic acid (mCPBA) converts alkenes to epoxides (oxiranes) in a concerted syn-addition. The peracid oxygen inserts into the C=C bond, forming a strained three-membered ring. Epoxides are highly reactive due to ring strain and serve as versatile synthetic intermediates.

日常示例

Epoxy resin adhesives (like Araldite) are made from epoxides that cross-link with hardeners to form incredibly strong bonds.

工业重要性

烯烃环氧化是有机合成中制备环氧化物的关键步骤，环氧化物可进一步开环制备反式二醇、氨基醇等功能分子。工业上采用多种环氧化方法：钛硅分子筛（TS-1）催化的过氧化氢环氧化用于生产环氧丙烷（绿色化学），夏普莱斯不对称环氧化用于手性药物合成（2001年诺贝尔化学奖）。

属性

类型
Organic
可逆
否
能量
放热
ΔH
-200.0 kJ/mol

相关反应

Oxidation of Secondary Alcohol to Ketone Claisen Condensation (Ethyl Acetate) Kolbe Electrolysis Baeyer-Villiger Oxidation Beckmann Rearrangement (Cyclohexanone Oxime) Catalytic Hydrogenation of Ethylene Condensation Polymerization (Nylon 6,6) Cope Rearrangement Oxidation of Primary Alcohol to Aldehyde Swern Oxidation

Frequently Asked Questions

What is the equation for Epoxidation of Alkenes (mCPBA)?
The balanced equation is: R₂C=CR₂ + mCPBA → epoxide + mCBA.
What type of reaction is Epoxidation of Alkenes (mCPBA)?
Epoxidation of Alkenes (mCPBA) is a organic reaction.
Is Epoxidation of Alkenes (mCPBA) exothermic or endothermic?
Epoxidation of Alkenes (mCPBA) is exothermic (releases energy). The enthalpy change (ΔH) is -200.0 kJ/mol.