Question:
Write chemical reactions involved in Gattermann-Koch Formylation
Write chemical reactions involved in Gattermann-Koch Formylation
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The Gattermann-Koch reaction is particularly useful for incorporating formyl groups into benzene rings to create benzaldehyde, a valuable intermediate in the synthesis of various organic compounds.
Updated On: Mar 4, 2025
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Solution and Explanation
The Gattermann-Koch reaction enables the synthesis of benzaldehyde derivatives by introducing a formyl (\(-\text{CHO}\)) group into benzene or similarly activated aromatic rings. This transformation utilizes carbon monoxide (\(\text{CO}\)) and hydrogen chloride (\(\text{HCl}\)) in the presence of Lewis acid catalysts such as aluminum chloride (\(\text{AlCl}_3\)) and copper(I) chloride (\(\text{CuCl}\)).
\[
\text{C}_6\text{H}_6 + \text{CO} + \text{HCl} \xrightarrow{\text{AlCl}_3, \text{CuCl}} \text{C}_6\text{H}_5\text{CHO}
\]
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