Isoartemisia ketone

Such routes have been used for the synthesis of natural products terpenes such as egomaketone (3-(4-methyl-3-pentenoyl)furan, perillene, ar-turmerone and iso-ar-turmerone [341], ar-curcumene [152], artemisia and isoartemisia ketones [342, 343], damascone [344], macrolides such as maysine [345], and pheromones with the sex attractant of the pine saw-fly [346],... 

The possibility of conversion of the dithioacctal into the corresponding ketone without reconjugation of the double bond is a noteworthy j feature of this synthetic scheme. The syntheses of iso-ar-turmerone and isoartemisia ketone mentioned above proceeded similarly via a carbophilic pathway. In the latter case a p-ethylenic dithioester was not isomerized during the following overall sequence carbophilic addition-methylation-dithioacetalization [343]. ... 

The analysis of essential oils which contain monoterpenoids has contributed many papers to the literature this year a disturbing number of analyses are trivial and furnish little that is new. The validity of the natural occurrence of minor components can be questioned in the light of isolation technique linalyl acetate yields eleven monoterpenoids on steam distillation.87 Analyses of interest are the major component (58%) of the steam-volatile leaf oil of Zieria aspalathoides is (—)-car-3-en-2-one 88 (+)-2,6-dimethyloct-7-en-4-one is the major component (97%) in Phebalium glandulosum subsp. glandulosum 89 major components in Achillea millefolium essential oil (isolated by steam distillation ) are sabinene and artemisia ketone,90 which is incorrectly named by the authors as isoartemisia ketone (possibly from... 

Essential oil from A. annua is another active research interest as it could be potentially used in perfume, cosmetics, and aromatherapy. Depending on its geographical origin, the oil yield in A. annua ranges from 0.02% to 0.49% on a fresh weight basis and from 0.04% to 1.9% on a dry weight basis. The major components in the oil were reported to be artemisia ketone (80), isoartemisia ketone (81), 1,8-cineole (82), and camphor (83) (Structure 5-5). GC/MS was employed to analyze the chemical composition in the essential oil more than 70 constituents have been identified. For more detailed information on the oil composition of essential oil from A. annua, the readers are referred to Refs. 65, 66 and 72-81. 

Yarrow contains about 0.1-1.4% volatile oil that is composed of azulene (0.51%), a-and P-pinenes (mainly P-), caryophyllene, bomeol, terpineol, cineole, bomyl acetate, camphor, sabinene, isoartemisia ketone, and other compounds (including a trace of thu-jone). The relative composition varies considerably (especially its azulene content) depending on sources (horhammer). A. millefolium L. sensu stricto (a hexaploid) contains no azeulene. Its oil primarily contains monoterpenes including linalool (26%),... 

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