Glucose to Fructose Conversion

Conversion of Glucose to Fructose

Aldohexose to Ketohexose (Glucose to Fructose)

Aldose reacts with excess of phenylhydrazine gives the corresponding osazone. The osazone is then hydrolysed with dilute HCl to give osone which on reduction with Zn and glacial acetic acid to give isomeric ketone of corresponding aldose.
D-Glucose converted into D-Fructose by the following process-

Conversion of Glucose to Arabinose

Conversion of Arabinose to Fructose

Conversion of Fructose to Glucose and Mannose

Conversion of Arabinose to Glucose and Mannose