In the given reaction,[A] and [B] are respect | vedclass

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(A) $LiAlH_4$ is a strong reducing agent that reduces both the ester and the ketone functional groups in the cyclic lactone to alcohols,resulting in t

Vedclass · Accepted Answer

$HO-CH_2-CH_2-CH_2-CH(OH)-CH_2-OH$ and $4-$hydroxytetrahydropyran$-2-$one

Vedclass · Answer

(A) $LiAlH_4$ is a strong reducing agent that reduces both the ester and the ketone functional groups in the cyclic lactone to alcohols,resulting in the ring-opening product $HO-CH_2-CH_2-CH_2-CH(OH)-CH_2-OH$ (pentane$-1,2,5-$triol). $NaBH_4$ is a milder reducing agent that selectively reduces the ketone group while leaving the ester group intact,resulting in the cyclic product $4-$hydroxytetrahydropyran$-2-$one. Therefore,$[A]$ is $HO-CH_2-CH_2-CH_2-CH(OH)-CH_2-OH$ and $[B]$ is $4-$hydroxytetrahydropyran$-2-$one.

In the given reaction,$[A]$ and $[B]$ are respectively:

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