ketones donot respond to fehling test, but why does fructose, inspite of being a ketose respond to the reaction?

Asked by SHUBHAM DIXIT | 22nd Dec, 2011, 12:00: AM

Expert Answer:

D-Fructose rearranges to D-glucose in alkaline medium .this rearrangement is known as Lobry de Bruyn-Van Ekenstein rearrangement.

It is probably due to this isomerisation that fructose reduces fehling's solution in alkaline medium although it does not contain a -CHO group.

Answered by  | 23rd Dec, 2011, 10:08: AM

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