90686-45-6Relevant academic research and scientific papers
Determination of the Absolute Configuration of Chiral Secondary Alcohols from Tetra-O-acetylglucosidation-Induced 1H Nuclear Magnetic Resonance Shifts
Faghih, Ramine,Fontaine, Catherine,Horibe, Isao,Immamura, Paulo M.,Lukacs, Gabor,et al.
, p. 4918 - 4920 (2007/10/02)
Tetra-O-acetylglucosidation-induced 1H nuclear magnetic resonance shifts were found highly characteristic of the absolute configuration of representative examples of R and S chiral secondary alcohols.The most important chemical shift changes of structurally diagnostic value for the determination of the absolute configuration of alcohols concern the protons of the aglycone attached to the carbons at β-position relative to the oxygen atom.
CONSTITUENTS OF FERNS. II. THE 9β,19-CYCLOLANOSTANE COMPONENTS OF Polysthicum aculeatum (L.) Roth.
Laonigro, Guglielmo,Adinolfi, Matteo,Barone, Gaspare,Lanzetta, Rosa,Mangoni, Lorenzo
, p. 273 - 276 (2007/10/02)
In addition to polysthicol, 1a, a phytosterol formed by an unprecedented biogenetic sequence, cyclolaudenol, 2a, 24-methylenecycloartanol, 3a, and cycloartenol, 4a, have been isolated from leaves of the title plant.The 13C-NMR spectra of these compounds have been assigned.This assignment confirms the biogenetically unique structure 1a of polysthicol.
