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(A) The given reaction is the conversion of an aldehyde (butanal) into an acetal ($1$,$1$-dimethoxybutane).This reaction proceeds via the nucleophilic

Vedclass · Accepted Answer

$CH_3OH, H^{+} (cat.),$ heat

Vedclass · Answer

(A) The given reaction is the conversion of an aldehyde (butanal) into an acetal ($1$,$1$-dimethoxybutane).This reaction proceeds via the nucleophilic addition of methanol to the carbonyl group in the presence of an acid catalyst.First,the aldehyde reacts with one equivalent of $CH_3OH$ in the presence of $H^{+}$ to form a hemiacetal.Then,the hemiacetal reacts with a second equivalent of $CH_3OH$ in the presence of $H^{+}$ to form the final acetal product.Therefore,the best conditions for this transformation are $CH_3OH$ with an acid catalyst $(H^{+})$ and heat to drive the reaction forward.

Column-$I$ (Reactions)	Column-$II$ (Reagents)
$(A).$ Benzophenone $\to$ Diphenylmethane	$(1).$ $LiAlH_4$
$(B).$ Benzaldehyde $\to$ $1-$Phenylethanol	$(2).$ $DiBAL-H$
$(C).$ Cyclohexanone $\to$ Cyclohexanol	$(3).$ $Zn(Hg) / \text{Conc. } HCl$
$(D).$ Phenyl benzoate $\to$ Benzaldehyde	$(4).$ $CH_3MgBr$

Give the best conditions for this transformation:

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