title: Acid-catalyzed hydrolysis of hesperidin at elevated temperatures.
abstract: 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.
authors.affiliation: US Citrus and Subtropical Products Laboratory, Winter Haven, FL 33881, USA. grohmann@citrus.usda.gov
authors.forename: K
authors.initials: K
authors.lastname: Grohmann
authors.forename: J A
authors.initials: JA
authors.lastname: Manthey
authors.forename: R G
authors.initials: RG
authors.lastname: Cameron
mesh_terms: 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
chemical_list: D013464:Sulfuric Acids; D014867:Water; D006569:Hesperidin; D005947:Glucose; C033158:sulfuric acid; D012210:Rhamnose