4871-90-3Relevant articles and documents
EREMOPHILENOLIDES FROM PETASITES JAPONICUS
Sugama, Ko,Hayashi, Koji,Mitsuhashi, Hiroshi
, p. 1531 - 1536 (1985)
Key Word Index - Petasites japonicus; Compositae; Senecioneae; sesquiterpene lactones; eremophilenolides; 13C NMR; CD spectra. - Chemical investigation of the young flower stalks of Petasites japonicus afforded some eremophilenolides, including a mixture of the two new compounds 6β-angeloyloxy-3β,8α-dihydroxyeremophil-7(11)-en-12,8β-olide and 6β-angeloyloxy-3β,8β-dihydroxyeremophil-7(11)-en-12,8α-olide.Their structures were elucidated by chemical and spectroscopic methods.The 13C NMR signals for the carbon atoms of the eremophilenolides were assigned with the help of Beierbeck's parameters.The CD spectra of the compounds are briefly discussed.
New eremophilane type lactones from Ligularia fauriei (FR.) KOIDZ
Moriyama,Takahashi
, p. 360 - 362 (1976)
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The Photosensitized Oxygenation of Furanoeremophilanes. III. The Transformations to the Skeletally Isomeric Lactones from Furanofukinol
Naya, Keizo,Shimizu, Mitsuaki,Nishio, Hideki,Takeda, Motonori,Oka, Shogo,Hirota, Keiji
, p. 1071 - 1080 (2007/10/02)
Pairs of the skeletal isomers of eremophilane-type lactones were synthesized from furanofukinol via photosensitized oxygenation, followed by lactone cleavage and refomation.Their stereochemistry has been clarified so as to be consistent with a classification method outlined in our earlier papers.