JEE Main Chemistry question
Match each transformation in Column-I with the reagent in Column-II most suited to accomplish it, and select the correct code:
| Column-I | Column-II | |---|---| | (A) φCOCH₃ → φCH₂CH₃ | (p) SnCl₂ | | (B) φCOCH₃ → φCH(OH)CH₃ | (q) Zn–Hg / HCl | | (C) φNO₂ → φNHOH | (r) NaBH₄ | | (D) φCH₂–OTs → φCH₃ | (s) Zn / NH₄Cl |
Answer: (A)
Solution
(A) Full reduction of the ketone to a CH₂ group (acetophenone to ethylbenzene) is Clemmensen reduction, Zn–Hg/HCl → A–q. (B) Reduction of the ketone only to the secondary alcohol (acetophenone to 1-phenylethanol) is achieved by the mild hydride reducing agent NaBH₄ → B–r. (C) Partial, controlled reduction of a
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