Acid-catalyzed hydrolysis of hesperidin at elevated temperatures.
Dilute sulfuric acid was used as a catalyst for hydrolysis of hesperidin suspensions in water at temperatures ranging from 25 to 180 degrees C. Significant acceleration of the reaction was observed at 120 degrees C and higher temperatures. This increase in the rate of hydrolysis can be attributed to increased solubilization of hesperidin in water at higher temperatures. Partial hydrolysis of hesperidin at 140 degrees C was used for the preparations of hesperetin-7-glucoside, which has a value in the synthesis of dihydrochalcone sweeteners. Simple separation of hesperetin and hesperetin-7-glucoside by extraction with dry acetone or lower alcohols has been developed.
Grohmann
K
K
US Citrus and Subtropical Products Laboratory, Winter Haven, FL 33881, USA. grohmann@citrus.usda.gov
Manthey
J A
JA
Cameron
R G
RG
D002384:Catalysis; D005947:Glucose / Q000737:chemistry; D006569:Hesperidin / Q000737:chemistry*; D006358:Hot Temperature; D006868:Hydrolysis; D007700:Kinetics; D012210:Rhamnose / Q000737:chemistry; D012995:Solubility; D013464:Sulfuric Acids / Q000737:chemistry; D013696:Temperature; D014867:Water
D013464:Sulfuric Acids; D014867:Water; D006569:Hesperidin; D005947:Glucose; C033158:sulfuric acid; D012210:Rhamnose