REIMER TIEMANN REACTION PDF

Reaction mechanism[ edit ] The mechanism of the Reimer-Tiemann reaction Chloroform 1 is deprotonated by a strong base normally hydroxide to form the chloroform carbanion 2 which will quickly alpha-eliminate to give dichlorocarbene 3 ; this is the principal reactive species. The hydroxide will also deprotonate the phenol 4 to give a negatively charged phenoxide 5. The negative charge is delocalised into the aromatic ring, making it far more nucleophilic. Nucleophilic attack of the dichlorocarbene gives an intermediate dichloromethyl substituted phenol 7.

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