D-Mannose overset{HO^{-}}{longleftrightarrow} | vedclass

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Question

(B) The reaction sequence represents the Lobry de Bruyn-van Ekenstein transformation.In this process,aldoses and ketoses undergo base-catalyzed isomer

Vedclass · Accepted Answer

$D$-Fructose

Vedclass · Answer

(B) The reaction sequence represents the Lobry de Bruyn-van Ekenstein transformation.In this process,aldoses and ketoses undergo base-catalyzed isomerization through a common enediol intermediate.$D$-Glucose,$D$-Mannose,and $D$-Fructose are epimers or isomers that exist in equilibrium in an alkaline solution.Therefore,the product $(A)$ is $D$-Fructose.

$D$-Mannose $\overset{HO^{-}}{\longleftrightarrow}$ $D$-Glucose $\overset{HO^{-}}{\longleftrightarrow}$ $(A)$.
Product $(A)$ of the above reaction is:

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$D$-Mannose $\overset{HO^{-}}{\longleftrightarrow}$ $D$-Glucose $\overset{HO^{-}}{\longleftrightarrow}$ $(A)$.Product $(A)$ of the above reaction is: