Gattermann koch reaction: In short

In short, the mechanism of Gattermann- Koch reaction can be written as follow. The Gattermann – Koch reaction is a variant of the Gattermann reaction in which carbon monoxide is used instead of hydrogen cyanide to formylate aromatic compounds. It is named after Ludwig Gattermann and Julius Arnold Koch , and is similar to the Friedel–Crafts reaction . Gattermann-Koch Reaction About Gattermann-Koch Reaction Benzaldehyde and many aromatic aldehydes are conveniently synthesized by treating benzene (or other aromatic compounds) with a mixture of carbon monoxide and hydrogen chloride (compounds of formyl chloride) in the presence of an equimolecular quantity of Lewis acid and a trace of copper (I) chloride. The initially formed cation (C+HO) adds to the benzene nucleus to give the σ complex which yields the aldehyde. Reaction Mechanism of ... Gattermann Koch ’ s reaction mechanism begins with the formation of the reactive species with the help of the acid. The overall aim of the reaction is to attach a formyl group (-CHO group) to an aromatic system. An example of the Gattermann – Koch reaction is given below.