Choose the correct option(s) for the following reaction sequence
Consider Q, R and S as major products
Consider Q, R and S as major products
- (A)(see structure)
S 
Q - (B)(see structure)
Q 
R - (C)(see structure)
R 
S - (D)(see structure)
R 
S
Answer: (B), (D)
Solution
The reaction sequence involves Friedel-Crafts acylation followed by reduction:
Based on the structures shown in options (B) and (D), these correctly represent the major products Q, R, and S.
- The starting material undergoes Friedel-Crafts acylation with succinic anhydride in the presence of to form a keto-acid (Q).
- Treatment with /Pd-C reduces the carbonyl to form the saturated ketone (R).
- Clemmensen reduction (Zn-Hg/HCl) reduces the ketone to the fully saturated product (S).
Based on the structures shown in options (B) and (D), these correctly represent the major products Q, R, and S.
JEE Advanced · 2019 · 27 May 2019 · Paper 2 · One or more correct options