title: Base-catalyzed isomerism in elfamycin antibiotics. Structures of ganefromycins epsilon and epsilon 1.
abstract: The structures of ganefromycins epsilon (2a) and epsilon 1 (2b) have been determined by spectroscopic techniques. The compounds are isomeric deoxygenated precursors of the parent antibiotics ganefromycins alpha and beta. The nature of the isomerism was determined by chemical interconversion experiments and spectroscope analysis to be a change in configuration at C-21. Evidence is provided for other cases of this type of isomerism in the elfamycin class of antibiotics.
authors.affiliation: Wyeth-Ayerst Research, Lederle Laboratories, Pearl River, NY 10965, USA.
authors.forename: G T
authors.initials: GT
authors.lastname: Carter
authors.forename: M
authors.initials: M
authors.lastname: Tischler
authors.forename: R R
authors.initials: RR
authors.lastname: West
authors.forename: A E
authors.initials: AE
authors.lastname: Bailey
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry*; D002254:Carbonates / Q000737:chemistry; D002851:Chromatography, High Pressure Liquid; D005663:Furans / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007536:Isomerism; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation; D015394:Molecular Structure; D016339:Spectrometry, Mass, Fast Atom Bombardment
chemical_list: D000900:Anti-Bacterial Agents; D002254:Carbonates; D005663:Furans; C097840:ganefromycin epsilon; C005686:sodium carbonate