NMR Spectra of Triterpenoids. III. Oleanenes and Migrated Oleanenes

• Published in: Chemical & pharmaceutical bulletin Vol. 43; no. 2; pp. 198 - 203
• Main Authors: ARAI, Yoko, SUZUKI, Hideki, AGETA, Hiroyuki, KIYOTANI, Tamiko, KITABAYASHI, Miyoe
• Format: Journal Article
• Language: English
• Published: Tokyo The Pharmaceutical Society of Japan 1995; 公益社団法人日本薬学会; Maruzen; Japan Science and Technology Agency
• Subjects: 1H-NMR; Alicyclic compounds, terpenoids, prostaglandins, steroids; Atomic and molecular physics; C-NMR; Chemistry; conformation; contormation; Exact sciences and technology; General molecular conformation and symmetry; stereochemistry; H-NMR; migrated oleanene; Molecular properties and interactions with photons; oleanene; Organic chemistry; Physics; Preparations and properties; Properties of molecules and molecular ions; Terpenoids; triterpenoid; Pentacyclic compound; Position isomer; Hydrocarbon; Molecular structure; Overhauser effect; Triterpene; NMR spectrum; Ketone; Ethylenic compound; Conformation
• ISSN: 0009-2363; 1347-5223
• DOI: 10.1248/cpb.43.198

The 1H- and 13C-NMR signals of nine triterpenoid hydrocarbons belonging to the oleanene and migrated oleanene groups together with friedelin were completely assigned by the application of modern NMR techniques, and the conformations of rings D and E are discussed on the basis of Chem3D Plus and MM2 calculations, and nuclear Overhauser effect spectroscopy spectra.