指碱性条件下，强碱将氯仿等二氯卡宾前体转化为二氯卡宾；然后与苯酚作用生成邻甲酰苯酚和对甲酰苯酚的反应；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...
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:
Reimer – Tiemann reactionWikipedia, From
瑞穆尔-悌曼反应(Reimer-Tiemann Reaction) 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, 1268, 1285. ・Wynberg, H.Chem. Rev.1960,60, 169. DOI:10.1021/cr60204a003 ・Wynberg, H.; Mei...
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 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...
Reimer Tiemann reaction 赖悌二氏反应 Reimer's reflex 赖默氏反射 reaction to 对…的反应 the reaction to 对……的反应 reaction stage reaction step 反应阶段 acid reaction n. 酸性反应 allergic reaction 过敏反应 reaction engine n. 喷气发动机 reverse reaction n. 逆反应 cachexia reaction ...
i. ii. View Solution Give balanced equation for the following name reaction: Reimer-Tiemann reaction. View Solution Write the reactions involved in the following reactions: (i) Clemmensen reduction (ii) Cannizzaro reaction View Solution Exams ...
1.The regularity of substituent effect on classicalReimer-Tiemann reactionis obtained for the first time in accordance with the Hammett-Brown equation.本文首先对经典的 Reimer-Tiemann 反应的取代基效应进行了基础性研究,首次得到了符合 Hammett-Brown 方程式的取代基效应规律,证实了反应的亲电取代历程。
1) Reimer-Tiemann reaction Reimer-Tiemann 反应 1. The regularity of substituent effect on classicalReimer-Tiemann reactionis obtained for the first time in accordance with the Hammett-Brown equation. 本文首先对经典的Reimer-Tiemann 反应的取代基效应进行了基础性研究,首次得到了符合 Hammett-Brown 方程式的...