Match List I with List II

Choose the correct answer from the options given below:

A-III, B-IV, C-II, D-I

The correct answer is option 2.  A-III, B-IV, C-II, D-I.

A. Gattermann-Koch Reaction

In the Gattermann – Koch reaction, benzene is treated with carbon monoxide in the acidic medium in the presence of anhydrous aluminium chloride to give benzaldehyde. In this reaction, anhydrous aluminium chloride works as a catalyst. It is an electrophilic substitution reaction. Gattermann – Koch Reaction can be written as follows:

Mechanism:

B. Stephen's Reaction:

An alkyl or aryl cyanide dissolved in ether is reduced with stannous chloride and HCl to give aliphatic or aromatic aldehydes. The reaction proceeds by the formation of aldimine hydrochloride (present as stannichloride), which are not stable and hydrolyzed to give aldehydes.

Mechanism:

C. Hoffmann Bromamide degradation:

Amides with no substituent on the nitrogen when treated with a solution of \(Br_2\) in \(KOH\) yield only primary amines having one carbon atom less than the amides.

Mechanism:

4. Fittig reaction:

Fittig Reaction is a form of ‘Coupling Reaction’ in which two aryl(aromatic) groups combine in the presence of Sodium in dry ether or THF(Tetrahydrofuran) to form a biaryl species.

Mechanism: