Triterpenoids from Abies species

Three new triterpenoid acids have been isolated from an ethereal extract of Siberian fir needles, and the structures of their methyl esters have been established on the basis of spectral characteristics.Novosibirsk Institute of Organic Chemistry, Siberian Branch, USSR Academy of Sciences. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 212–219, March–April, 1989.     

Triterpenoids from Abies species. IV. New triterpene acids from the needles of Abies sibirica

Four new triterpene acids of the mariesiic acid series have been isolated from an extract of the needles of the Siberian fir in the form of their methyl esters, and their structures have been established on the basis of chemical transformations, spectral characteristics, and x-ray structural analysis.Novosibirsk Institute of Organic Chemistry, Siberian Branch, USSR Academy of Sciences. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 824–831, November–December, 1987.     

Triterpenoids from Abies sp. IX. Triterpene lactones from Abies sibirica bark

Four lanostane lactones have been isolated from an ethereal extract of Siberian fir bark — abieslactone and its hydroxy and keto analogs, and also (25R)-24,25-dihydroabieslactone, the structure of which was established on the basis of a chemical and spectral correlation with known compounds.Novosibirsk Institute of Organic Chemistry, Siberian Branch, USSR Academy of Sciences. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 220–225, March–April, 1989.     

Chemical investigation ofHippopha? rhamnoides. II. Main components of the neutral reaction of the saponification products of an extract of the leaves of the sea buckthorn

The qualitative and quantitative compositions of the neutral fraction of the products of the saponification of a diethyl ether extract of a sea buckthorn leaves have been investigated. Fourteen triterpene compounds and eight aliphatic alcohols have been identified from the results of GLC, CMS, and PMR and also from their melting points.Novosibirsk Institute of Organic Chemistry, Siberian Branch, Academy of Sciences of the USSR. Institute of Catalysis, Siberian Branch, Academy of Sciences of the USSR, Novosibirsk. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 514–519, July–August, 1985.     

Purification of total phospho- and phosphonolipids of cotton and kenaf seeds from accompanying substances

The quantitative amounts of the essential oil of the European white birch of the Yakut population in the annual cycle and its component composition have been investigated.V. N. Sukachev Forest and Timber Institute, Siberian Branch, USSR Academy of Sciences, Krasnoyarsk. Novosibirsk Institute of Organic Chemistry, Siberian Branch, USSR Academy of Sciences. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 803–805, 1987.     

New derivatives of (?)-neocembrene from the soft coral Sarcophyton trocheliophorum

A hexane extract of the soft coralSarcophyton trocheliophorum has yielded two new diterpenoids for which the structures of 13S-hydroxy-(–)-neocembrene and 13S-hydroxy-11,12-epoxy-(–)-neocembrene have been established.Novosibirsk Institute of Organic Chemistry, Siberian Branch, Academy of Sciences of the USSR. Pacific Ocean Institute of Bioorganic Chemistry, Far Eastern Branch, Academy of Sciences of the USSR, Vladivostok. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 535–540, July–August, 1988.     

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.     

Polyprenols and dolichols from the needles, needle-free shoots, and bark ofPinus sibirica

The presence of bioregulators of animal organisms — dolichols — has been established in the needles, needle-free shoots, and bark of the Siberian stone pine. The qualitative and quantitative compositions of the mixtures of the isoprenologues and polyprenols have been established by the HPLC method. In addition, known diterpene alcohols ((E,E,E)-geranylgeraniol and labd-8(17),13E-dien-15-ol) esterified with higher fatty acids have been identified in the bark.Novosibirsk Institute of Organic Chemistry, Siberian Division of the Russian Academy of Sciences. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 729–733, November–December, 1994.     

O-acylated lignans from the wood of Abies species

Summary From the wood of the Siberian firAbies sibirica Ledeb. and the Khingan firA. nephrolepis Maxim., five new compounds have been isolated which are ester derivatives of the lignans lariciresinol, olivil, and hydroxymatairesinol.It has been established that olivil is esterified at the primary alcoholic hydroxyl by hydroxycinnamic acids — p-coumaric or ferulic — and lariciresinol is esterified by vanillic acid. A representative of the guaialignanolides — hydroxymatairesinol — is esterified at the secondary aliphatic hydroxy group with p-hydroxybenzoic or vanillic acid.Institute of Organic Chemistry, Siberian Branch of the Academy of Sciences of the USSR. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 337–341, May–June, 1977.     

Abietic and dehydroabietic acid derivatives from needle-free shoots of shoots ofPinus sylvestris

Methyl ethers of hydroxy and keto derivatives of abietic and dehydroabietic acids — 12-hydroxy- and 12-ketoabietic and 12-hydroxy-, 15-hydroxy-, and 17-ketodehydroabietic acids — have been isolated from an extract of needle-free shoots of the Scotch pine and have been identified in the form of methyl esters.S. M. Kirov Leningrad Academy of Wood Technology. Novosibirsk Institute of Organic Chemistry, Siberian Branch, Academy of Sciences of the USSR. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 345–351, May–June, 1985.     

Crystal structure investigation of ternary molybdates Li3Ba2Ln3(MoO4)3 (Ln=Gd,Tm)

Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences. Institute of Physics, Siberian Branch, Russian Academy of Sciences. Buryat Institute of Natural Sciences, Siberian Branch, Russian Academy of Sciences. Translated from Zhurnal Strukturnoi Khimii, Vol. 33, No. 3, pp. 126–130, May–June, 1992.     

First example of the formation of highly ordered supermolecular structures in a series of gibberellin derivatives

The 3-O-palmitate and 3-O-tridecanoate of gibberellin A₃ have been synthesized and monomolecular Langmuir-Blodgett films have been obtained from them.Novosibirsk Institute of Organic Chemistry, Siberian Division of the Russian Academy of Sciences. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 793–795, November–December, 1994.     

Steroid glycosides from the seeds ofPetunia hybrida. Structures of petuniosides B,D, and F

Oplodiol, 3-hydroxyepimanool, and epitorulosol have been isolated for the first time from the oleoresin ofPicea ajanensis. On the basis of the results obtained, it may be assumed that the species studied is possibly a hybrid of Yeddo spruce and Siberian spruce.Novosibirsk Institute of Organic Chemistry, Siberian Division of the Russian Academy of Sciences. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 359–363, May–June, 1994.     

The structure and stereochemistry of teucrin A

Summary The structure of teucrin A has been confirmed by spectral and chemical methods and the relative configurations at all the asymmetric centers have been shown.Institute of Chemistry, Academy of Sciences of the Moldavian SSR. Novosibirsk Institute of Organic Chemistry, Siberian Branch, Academy of Sciences of the USSR. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 169–175, March–April, 1973.     

Influence of structural factors on delocalization of spin density in nitroxyl radicals of the imidazoline series

Institute of Chemical Kinetics and Combustion, Siberian Branch, Russian Academy of Sciences Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences. Translated from Zhurnal Strukturnoi Khimii, Vol. 32, No. 6, pp. 42–51, November–December, 1991.     

Ultraviolet absorption of flavonoids VI. Protonation constants of some dihydroxyflavones

Summary The protonation (basicity) constants of six disubstituted flavones have been determined by the spectrophotometric method.Irkutsk Institute of Organic Chemistry, Siberian Branch of the Academy of Sciences of the USSR. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 587–590, September–October, 1975.     

Inadequacy of one-electron approach for investigating antiaromatic molecules and their isomerization reactions

Institute of Catalysis, Siberian Branch, Academy of Sciences of the USSR. Institute of Organic Chemistry, Siberian Branch, Academy of the Sciences of the USSR. Translated from Zhurnal Strukturnoi Khimii, Vol. 32, No. 5, pp. 30–41, September–October, 1991.     

Photochemical route to cembranoids containing a cis-disubstituted double bond

The 2-cis isomers of the natural diterpenoids isocembrol, 4-epiisocembrol, and isocembrene have been synthesized from a norcembrane ketone by the use of photochemical methods.Novosibirsk Institute of Organic Chemistry, Siberian Branch, USSR Academy of Sciences. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 180–187, March–April, 1988.