Partial synthesis and characterization of karpoxanthins and cucurbitaxanthin A epimers

Péter Molnár, József Deli, Zoltán Matus, Gyula Tóth, Andrea Steck, Hanspeter Pfander

Research output: Article

8 Citations (Scopus)

Abstract

Karpoxanthin (=(all-E,3S,5R,6R,3'R)-5,6-dihydro-β,β-carotene-3,5,6,3'- tetrol; 7), 6-epikarpoxanthin (=(all-E,3S,5R,6S,3'R)-5,6-dihydro-β,β- carotene-3,5,6,3'-tetrol; 4), 5-epikarpoxanthin (=(all-E,3S,5S,6R,3'R)-5,6- dihydro-β,β-carotene-3,5,6,3'-tetrol; 11), cucurbitaxanthin A (=(all- E,3S,5R,6R,3'R)-3,6-epoxy-5,6-dihydro-β,β-carotene-5,3'-diol; 10), epicucurbitaxanthin A (= (all-E-3S,5S,6R,3'R)-3,6-epoxy-5,6-dihydro-β,β- carotene-5,3'-diol; 14), and the corresponding mutatoxanthin epimers 8, 9, 12, and 13 were prepared in crystalline state by the acid-catalyzed hydrolysis of (3S,5R,6S,3'R)- and (3S,5S,6R,3'R)-antheraxanthin (5 and 6, resp.) and characterized by their UV/VIS, CD, 1H- and 13C-NMR, and mass spectra.

Original languageEnglish
Pages (from-to)1994-2002
Number of pages9
JournalHelvetica Chimica Acta
Volume82
Issue number11
DOIs
Publication statusPublished - jan. 1 1999

ASJC Scopus subject areas

  • Catalysis
  • Biochemistry
  • Drug Discovery
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

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