只有富电子的苯酚化合物可以发生该反应，原因是羟基（实际为氧负）与苯环p-π共轭，增加了苯环邻对位的电子云密度；反应的实质是亲电芳香取代反应；反应过程：1、二氯卡宾生成；三氯甲烷脱质子，然后α消除形成二氯碳苯，该反应能发生的原因在于pKa规则，氢氧根共轭酸的酸性更弱；2、苯酚被去质子，成醌型，α位和生...
5、质子淬灭得到产物; 因为给电子共轭效应,苯酚的对位同样可以发生上述的反应,机理类似。有兴趣的可以自己画画,此处不再描述; 学习机理不能认死理,要明白一些事:
The transformation of a formyl group onto the ortho - or para -position of an activating group in an electron-rich aromatic compound by warming with chloroform and aqueous alkali is generally known as the Reimer–Tiemann reaction. Several electron-rich aromatic compounds have been suggested for ...
瑞穆尔-悌曼反应(Reimer-Tiemann Reaction)取代反应瑞穆尔-悌曼反应(Reimer-Tiemann Reaction)2014/8/14 取代反应 二氯卡宾, 亲电反应 Author: LuWenjie 概要 在氯仿与碱存在的条件下,在苯酚上导入甲酰基的反应。一般情况的话,主要生成邻位取代产物。 基本文献 ・Reimer, K.; Tiemann, F. Ber. 1876, 9, 824...
Reimer-Tiemann reaction 赖悌二氏反应相关短语 shutdown margin (反应性) 停堆裕度 temperature defect (反应性) 温度亏损 exponential assembly (反应堆的) 指数装置 manual scram (反应堆) 手动紧急停堆 heat exchanger lag (反应堆) 热交换器延迟 graphite stack (反应堆中的) 石墨堆 Napier's aldehyde test...
Reimer-Tiemann reaction noun ˈrīmə(r)¦tēmən-, -ēˌmän- :either of two similar chemical reactions: a :a reaction for producing phenolic aldehydes by the action of chloroform and caustic alkali on phenols b :a reaction for producing phenolic acids from carbon tetrachloride, alka...
Chemical Properties || Reimer Tiemann Reaction || Kolbe Reaction View Solution Dehydration Of Alcohols|Reactions Of Phenols |Halogenation|Kolbe's Reaction|Reimer-Tiemann Reaction|Summary View Solution Reaction OF Phenol (Nitration ,Halogenation, Kolbe ,Reimer Tiemann Reaction Etc) || Physical Properties ...
reimer tiemann reaction 雷默-带曼反应文献(pubmed) 赞助商链接以下为句子列表:英文: The reactions include Heck reaction, Sonogashira reaction, Kumada-Corriu reaction, Negishi reaction, Stille reaction, Su- zuki reaction, Ullmann reaction, C—N coupling, C—O coupling, C—P coupling, and C—S ...
reimer tiemann reaction 释义 雷默 带曼反应
A. V. GAONKARDep. Chem., Goa Univ., Bambolim, Goa 403 005, IndiaJ. K. KIRTANYDep. Chem., Goa Univ., Bambolim, Goa 403 005, IndiaJohn Wiley & Sons, Ltd.CheminformGaonkar AV, Kirtany JK (1991) Reimer-Tiemann reaction using carbon tetrachloride. Indian J Chem Sect B 30B:800...