17.7 Lithium Enolates 17.8 α-Selenation: A Synthesis of α,β-Unsaturated Carbonyl Compounds 17.9 Additions to α,β-Unsaturated Aldehydes and Ketones

河北科技大学化学与制药工程学院：《化学反应工程》课程PPT教学课件（讲稿）第三章 理想流动反应器（3.1）流动模型概述

The aldols formed in aldol additions can be easily dehydrated to yield conjugated enals (enones)

If a chiral atom attached to the carbonyl group, the stereoselectivity of nucleophilic addition follows the Cram’s rule

The most characteristic reaction of aldehydes and ketones is nucleophilic addition to the carbon-oxygen double bond

Many other pairs of reagents that form cabocations (orcarbocationlike species) may be used as well

No addition of bromine No oxidation No hydroation Slow addition at high temperature and pressure

11.15A Ethers by Intermolecular Dehydration of Alcohols

Acid-Catalyzed hydration of Alkenes Oxymercuration-Demeruration Hydroboration-Oxidation

一、引言及纳米材料概述 二、纳米材料的特性 三、纳米材料的制备 四、纳米材料的表征 五、纳米材料的应用 六、纳米材料之星—单壁碳纳米管