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Question:

In the given transformation, which of the following is the most appropriate reagent?

NH2NH2,OH−

NaBH4

Zn−Hg/HCl

Na,liquidNH3

Solution:

In the given reaction, the reactant has an acid-sensitive group, i.e., OH−. So, the transformation can only be carried out by the 'Wolf-Kishner' reduction method, i.e., NH2NH2,OH−. Clemmensen reduction using Zn−Hg/HCl will not work here.