A new terpene ketone,a component of the essential oil ofElsholtzia ciliata

A new terpene ketone which has been called dehydroelsholtsia ketone has been isolated from the essential oil ofElsholtzia ciliata (Thumb.) Hyl. The structure of dehydroelsholtzia ketone as 3-methyl-2-(3-methylbut-2-enoyl)furan has been proposed on the basis of a study of its IR, PMR, mass and¹³C spectra and has been confirmed by its conversion into elsholtzia ketone.     

A new component ofArtemesia hanseniana

A sesquiterpene lactone with mp 97–99°C, C₁₅H₂₀O₃, identified as deoxy--santonin, has been isolated from the epigeal part ofArtemisia hanseniana var.phylostachus.V. L. Komarov Institute of Botany of the Academy of Sciences of the Azerbaidzhanian SSR, Baku. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 564–568, September–October, 1981.     

Monoterpenes of the essential oil ofLarix sukaczewii

An analytical separation has been performed of the essential oil of the bark of one-year winter shoots ofL. sukaczewii andL. sibirica. Out of the 37 terpenes detected, 13 monoterpenes have been identified. The two species have identical sets of monoterpenes with significant differences in their relative amounts.Botanical Garden-Institute, Ufa Scientific Center of the Russian Academy of Sciences. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 640–642, September–October, 1994.     

Composition of the essential oil ofLarix sibirica

The composition of the essential oil isolated under production conditions from the woody verdure ofLarix sibirica Lbd. growing in the Krasnoyarsk district has been studied. The bulk of the essential oil is composed of monoterpenes (84.95%). Among the sesquiterpene hydrocarbons -murolene, -humulene, and caryophyllene are present in considerable amounts. The sesquiterpene alcohol -cadinol has been detected. -Murolene, -murolene, and longifolene have been isolated from the essential oil in the chromatographically pure state by column and preparative thin-layer chromatography.Siberian Branch, Krasnoyarsk Technological Institute. Translated Khimiya Prirodnykh Soedinenii, No. 3, pp. 312–316, May–June, 1982.     

Composition of the essential oil ofTanacetum vulgare

The essential oil of the common tansy obtained from a population growing in the Dzhungarain Ala-Tau has been investigated. More than 50 substances have been detected, of which 39, including the main ones, have been identified.Institute of Chemical Sciences, Academy of Sciences of the Kazakh SSR, Alma-Ata. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 716–720, November–December, 1984.     

Seasonal dynamics of the essential oil ofAbies sibirica

The qualitative and quantitative compositions of the essential oils of the woody verdure and bark of the Siberian fir have been studied. It has been shown that the oils investigated differ both in their amount and in the ratio of their individual components. The annual dynamics of the main substances are also different.Deceased.V. N. Sukachev Forest and Timber Institute, Siberian Branch, Academy of Sciences of the USSR, Krasnoyarsk. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 718–721, November–December, 1983.     

Seasonal change in the essential oil ofLarix sibirica

Information is given on the qualitative and quantitative changes in the essential oil from the woody verdure of the Siberian larch. It has been established that during the vegetation period not only does the amount of essential oil in the woody verdure of the Siberian larch change but so also does the ratio of its individual components.Siberian Technological Institute, Krasnoyarsk. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 51–54, January–February, 1982.     

Asaricin, the main component of Ocotea opifera Mart. essential oil

Investigation of the volatile fraction from the stem bark of Ocotea opifera Mart. led to the isolation and characterization of asaricin, a phenolic derivative with antifungal and insecticidal activity, as the main component, which is described for the first time for the genus Ocotea. The structure has been established by a study of its mono- and bidimensional NMR spectra and mass spectrometry.     

Acorafuran, a new sesquiterpenoid from Acorus calamus essential oil

The structure of acorafuran (6-isopropyl-4-methyl-7,8-dihydro-6H-naphtho[1,8-bc]furan), a new cadalin-type sesquiterpenoid from Acorus calamus essential oil, was established using spectral data (NMR, mass spectrometry). __________ Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 566–568, November–December, 2006.     

A three component ketone synthesis from a phenylthiovinylphosphine oxide

The anion formed by addition of an alkyl-lithium to the vinyl phosphine oxide (40 reacts with aldehydes to give vinyl sulphie, easily hydrolysed to ketones.