Question

The following transformation is carried out by: \includegraphics[width=0.5\textwidth]{08.jpeg} Choose the correct answer from the options given below:

• A. (i) Cyclic polymerization, (ii) Gatterman-Koch's reaction, (iii) Bischler-Napieralski's reaction
• B. (i) Cycloaddition, (ii) Etard's reaction, (iii) Pomeranz-Fritsch's reaction
• C. (i) Cyclic polymerization, (ii) Etard's reaction, (iii) Doebner-Miller's synthesis
• D. (i) Cyclic polymerization, (ii) Gatterman-Koch's reaction, (iii) Pomeranz-Fritsch's reaction

Hint:

Cyclic polymerization is often used to prepare intermediate aromatic compounds, which are further functionalized in reactions like Gatterman-Koch's and Pomeranz-Fritsch's.

Answer 1

The Correct Option is D

Step 1: Cyclic Polymerization.
The initial substance undergoes cyclic polymerization, forming a cyclic precursor for subsequent reactions.

Step 2: Gatterman-Koch's Reaction.
This reaction introduces a formyl group to an aromatic compound, a crucial intermediate step.

Step 3: Pomeranz-Fritsch's Reaction.
This reaction converts the intermediate from Step 2 into isoquinoline.

Step 4: Conclusion.
The correct sequence is cyclic polymerization, Gatterman-Koch's reaction, and Pomeranz-Fritsch's reaction. Therefore, option (4) is correct.

Final Answer: \[\boxed{\text{(4) (i) Cyclic polymerization, (ii) Gatterman-Koch's reaction, (iii) Pomeranz-Fritsch's reaction}}\]