(1S,5R)-(-)-2,4,4-trimethylbicyclo[3.1.1]hept-2-en-6-one, from the essential oil of the Ethiopian plant Laggera tomentosa

Authors
Asfaw, N Storesund, HJ Skattebol, L Aasen, AJ
Citation
N. Asfaw et al., (1S,5R)-(-)-2,4,4-trimethylbicyclo[3.1.1]hept-2-en-6-one, from the essential oil of the Ethiopian plant Laggera tomentosa, PHYTOCHEM, 52(8), 1999, pp. 1491-1494
Citations number
16
Categorie Soggetti
Agricultural Chemistry","Animal & Plant Sciences
Journal title
PHYTOCHEMISTRY
ISSN journal
00319422 → ACNP
Volume
52
Issue
8
Year of publication
1999
Pages
1491 - 1494
Database
ISI
SICI code
0031-9422(199912)52:8<1491:(FTE>2.0.ZU;2-8
Abstract
Enantiomerically pure (1S,5R)-(-)-2,4,4-trimethylbicyclo[3.1.1]hept-2-en-6- one has been found along with chrysanthenone, thymoquinol dimethyl ether an d two stereoisomers of dehydrocitral in the essential oil of Laggera toment osa, which is endemic to Ethiopia. (1S,5R)-(-)-2,4,4-trimethylbicyclo[3.1.1 ]hept-2-en-6-one has been identified for the first time from a natural sour ce. Chrysanthenone which is the major constituent of the oil (58%), occurs as the (+)- and (-)-enantiomers in a ca 92:8 ratio. (C) 1999 Elsevier Scien ce Ltd. All rights reserved.