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 starting material undergoes a cyclic polymerization reaction. This type of reaction typically forms a cyclic structure that is a precursor for further transformations.

Step 2: Gatterman-Koch's Reaction.
This reaction involves the formylation of an aromatic compound. In this case, it adds a formyl group to the aromatic compound, which is a critical intermediate step in the transformation.

Step 3: Pomeranz-Fritsch's Reaction.
The Pomeranz-Fritsch's reaction leads to the formation of isquinoline from the reaction intermediate formed in step 2.

Step 4: Conclusion.
Thus, the correct sequence involves cyclic polymerization, Gatterman-Koch's reaction, and the Pomeranz-Fritsch's reaction. Hence, option (4) is correct.

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