Which of the following reagent(s) is/are used | vedclass

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(A) The starting material is an ester containing a ketone group. Direct reduction with $LiAlH_4$ would reduce both the ketone and the ester groups to

Vedclass · Accepted Answer

glycol$/LiAlH_4/H_3O^{+}$

Vedclass · Answer

(A) The starting material is an ester containing a ketone group. Direct reduction with $LiAlH_4$ would reduce both the ketone and the ester groups to alcohols. To selectively reduce the ester to an alcohol while keeping the ketone intact,we must first protect the ketone.$1$. The ketone is protected by forming a cyclic acetal using ethylene glycol (glycol) in the presence of an acid catalyst.$2$. The ester group is then reduced to a primary alcohol using $LiAlH_4$.$3$. Finally,the cyclic acetal is deprotected (hydrolyzed) back to the ketone using $H_3O^{+}$.

List $-I$ (Products formed)	List $-II$ (Reaction of carbonyl compound with)
$(a).$ Cyanohydrin	$(i).$ $NH_2OH$
$(b).$ Acetal	$(ii).$ $RNH_2$
$(c).$ Schiff's base	$(iii).$ Alcohol
$(d).$ Oxime	$(iv).$ $HCN$

Which of the following reagent$(s)$ is/are used for the given conversion?

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Match List $-I$ with List $-II.$

List $-I$ (Products formed) List $-II$ (Reaction of carbonyl compound with)

$(a).$ Cyanohydrin $(i).$ $NH_2OH$

$(b).$ Acetal $(ii).$ $RNH_2$

$(c).$ Schiff's base $(iii).$ Alcohol

$(d).$ Oxime $(iv).$ $HCN$

Choose the correct answer from the options given below:

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Which of the following fails to give the iodoform test?

The reagent with which both acetaldehyde and acetone react is

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