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MHT CET202616 April 2026Evening ShiftChemistryAldehydes and KetonesActual

Identify the name of the above reaction.

Options

  1. AEtard reaction
  2. BGatterman-Koch formylation reaction
  3. CStephen reaction
  4. DRosenmund reaction

Correct answer

B. Gatterman-Koch formylation reaction

Step-by-step solution

The given reaction shows the conversion of benzene to benzaldehyde using carbon monoxide ( CO ) and hydrogen chloride ( HCl ) in the presence of anhydrous aluminum chloride ( AlCl₃ ) under high pressure. This specific transformation is known as the Gatterman-Koch formylation reaction. In this reaction, a formyl cation is generated in situ from CO , HCl , and the Lewis acid catalyst ( AlCl₃ ), which then undergoes electrophilic aromatic substitution with benzene to form benzaldehyde. Let us review the other options:

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