Acetylenic thiophenes from the roots of Escinops ellenbeckii from Ethiopia.
The hexane fraction from the roots of Echinops ellenbeckii O. Hoffm. from Ethiopia yielded seven acetylenic thiophenes of which five compounds (1, 3, 4, 6, 7) are reported for the first time in this species: the monothiophenes 5-(penta-1,3-diynyl)-2-(but-3-en-1-ynyl)-thiophene (1), 5-(penta-1,3-diynyl)-2-(4-acetoxy-but-1-ynyl)-thiophene (2), 5-(penta-1,3-diynyl)-2-(3-hydroxy-4-acetoxy-but-1-ynyl)-thiophene (3), 5-(penta-1,3-diynyl)-2-(3,4-diacetoxy-but-1-ynyl)-thiophene (4), 5-(penta-1,3-diynyl)-2-(3-chloro-4-acetoxy-but-1-ynyl)-thiophene (5), 5-(penta-1,3-diynyl)-2-(3,4-epoxy-but-1-ynyl)-thiophene (6) and the dithiophene 5-[(5-acetoxymethyl-2-thienyl)-2-(but-3-en-1-ynyl)]-thiophene (7). Additionally, four fatty acids (C14, C15, C16 and C18), seven fatty acid esters and three long-chain hydrocarbons could be identified. All the structures were elucidated on the basis of spectral data by GC-MS, HRMS and the NMR techniques.
Hymete
Ariaya
A
The Plant Biocentre, Department of Biology, Norwegian University of Science and Technology (NTNU), N-7491 Trondheim, Norway.
Rohloff
Jens
J
Kjøsen
Helge
H
Iversen
Tor-Henning
TH
D019659:Asteraceae / Q000737:chemistry* / Q000166:cytology / Q000502:physiology; D002849:Chromatography, Gas; D005002:Ethiopia; D005227:Fatty Acids / Q000302:isolation & purification; D008401:Gas Chromatography-Mass Spectrometry; D018517:Plant Roots / Q000737:chemistry* / Q000166:cytology; D013876:Thiophenes / Q000737:chemistry / Q000302:isolation & purification* / Q000378:metabolism
D005227:Fatty Acids; D013876:Thiophenes