HPLC separation and determination of naphtho[2,3-b]furan-4,9-diones and related compounds in extracts of Tabebuia avellanedae (Bignoniaceae)

Structure Determination of New Isomeric

Structure Determination of New Isomeric Naphtho[2,3-b]furan-4,9-diones from Tabebuia avellanedae by the selective-INEPT technique

✍ Hildebert Wagner; Bernhard Kreher; Hermann Lotter; Matthias O. Hamburger; Geoffr 📂 Article 📅 1989 🏛 John Wiley and Sons 🌐 German ⚖ 590 KB

Beside the known naphthoquinones, dehydro-cc -1apachone (17) and lapachol (20), four new naphtho[2,3-b]furan-4,9-diones, i. e. the 2-acetyl-S-hydroxy, 2-acetyl-E-hydroxy, (-)-5-hydroxy-2-(l'-hydroxyethyl), and (+)-8hydroxy-2-( 1'-hydroxyethyl) derivatives 16, 15,12, and 13, respectively, and the new