title: Thiol-promoted catalytic synthesis of diphenolic acid with sulfonated hyperbranched poly(arylene oxindole)s.
abstract: Acid-catalyzed condensation of levulinic acid and phenol into high yields of diphenolic acid (>50%) is possible with a combination of sulfonated hyperbranched polymers and thiol promotors, either added as a physical mixture or bound to the polymer by ion-pairing.
authors.affiliation: Centre for Surface Chemistry and Catalysis, Katholieke Universiteit Leuven, Kasteelpark Arenberg 23, 3001 Heverlee, Belgium.
authors.forename: Stijn
authors.initials: S
authors.lastname: Van de Vyver
authors.forename: Jan
authors.initials: J
authors.lastname: Geboers
authors.forename: Sasja
authors.initials: S
authors.lastname: Helsen
authors.forename: Feng
authors.initials: F
authors.lastname: Yu
authors.forename: Joice
authors.initials: J
authors.lastname: Thomas
authors.forename: Mario
authors.initials: M
authors.lastname: Smet
authors.forename: Wim
authors.initials: W
authors.lastname: Dehaen
authors.forename: Bert F
authors.initials: BF
authors.lastname: Sels
mesh_terms: D002384:Catalysis; D062385:Hydroxybenzoates / Q000138:chemical synthesis*; D007211:Indoles / Q000737:chemistry*; D007982:Levulinic Acids / Q000737:chemistry; D019800:Phenol / Q000737:chemistry; D013438:Sulfhydryl Compounds / Q000737:chemistry*
chemical_list: D062385:Hydroxybenzoates; D007211:Indoles; D007982:Levulinic Acids; D013438:Sulfhydryl Compounds; D019800:Phenol; C032246:levulinic acid