Crystal and molecular structures of methyl (2-hydroxy-3-oxo-5-p-tolyl-2,3-dihydrofuran-2-yl)acetate

Institute of Chemical Physics in Chernogolovka, Russian Academy of Sciences. Institute of Technical Chemistry, Russian Academy of Sciences. A. M. Gorkii Perm State University. Translated fromZhurnal Struktumoi Khimii, Vol. 36, No. 5, pp. 952–956, September–October, 1995.     

Crystal and molecular structure of 1-(2′-methoxyphenyl)-3,7,10-trimethylstannatrane

A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences. Irkutsk Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences. Translated fromZhurnal Strukturnoi Khimii, Vol. 35, No. 5, pp. 199–203, September–October, 1994.     

Construction of crystal structure sections using the clat software package

Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences. Institute of Physical Chemistry, Polish Academy of Sciences. Translated fromZhurnal Struktumoi Khimii, Vol. 36, No. 5, pp. 956–959, September–October, 1995.     

Coordinated diaminoguanidinium(1+) ion in the crystal structure of the [Cu(CH8N5)Cl3] complex

Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences. Institute of Organoelement Compounds, Russian Academy of Sciences. Translated fromZhurnal Strukturnoi Khimii, Vol. 36, No. 5, pp. 936–941, September–October, 1995.     

Production of (+)-norsolanadione

Institute of Chemistry, Bashkir Scientific Center, Urals Branch, Russian Academy of Sciences, Ufa. Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 735–736, September–October, 1991.     

Molecular structure of 10,10-dimethyl-7H-pyrano[4′,3′:4,5]thieno[3,2-e]-(1,2,4)-triazolo[2,3-e]pyrimidine

Institute of Fine Organic Chemistry, Armenian Academy of Sciences. A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences. Translated fromZhurnal Strukturnoi Khimii, Vol. 35, No. 5, pp. 197–199, September–October, 1994.     

Refinement of the crystal and molecular structure of 4-phenylthiosemicarbazide diacetic acid monohydrate

Institute of Applied Physics, Academy of Sciences, Moldova Republic. Institute of Chemistry, Academy of Sciences, Moldova Republic. Translated fromZhurnal Strukturnoi Khimii, Vol. 35, No. 3, pp. 154–158, May–June, 1994.     

Autooxidation of 2-isobutyl-5,6-benzo-1,3,2-dioxaborepane

Using PMR, IR, and mass spectrometric methods it was shown that the main autooxidation product upon prolonged storage of 2-isobutyl-5,6-benzo-1,3,2-dioxaborepane is 2,2′-oxybis(5,6-benzo-1,3,2-doxaborepane). A. V. Bogatskii Physicochemical Institute, National Academy of Sciences of Ukraine, Odessa 270080. Organic Chemistry Institute, Ufa Science Center, Russian Academy of Sciences, Ufa 450054. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1418–1421, October, 1998.     

Synthesis of 2-amino-5-nitro-4H-pyran-3-carbonitriles

Reaction of 2-carbomethoxy-ω-nitroacetophenone with arylmethylenemalononitriles gives the previously unknown 2-amino-4-aryl-5-nitro-6-(2-carbomethoxyphenyl)-4H-pyran-3-carbonitriles. N. D. Zelinskii Institute of Organic Chemistry, Russian Academy of Sciences, Moscow 117913. E-mail: muskat@cacr.ioc.ac.ru. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, pp. 1661–1663, December, 1998.     

Crystal structure of bis(5,5-dimethyl-1-hydroxo-4-oxo-2-phenyl-pyrrolin-2-YL-3), recyclization product of 3-imidazoline enaminoketone

Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences. Translated fromZhurnal Strukturnoi Khimii, Vol. 35, No. 3, pp. 145–151, May–June 1994.     

Dependence of the growth-regulating activity of macrocyclic allyl alcohols of the cembrane series on the stereochemistry of the disubstituted double bond

With the use of a number of known and two specially synthesized cembranoids it was established that the growth-inhibiting activity of membrane alcohols does not change appreciably on the inversion of the configuration of the Δ² double bond in their molecule. Institute of Organic Chemistry, Siberian Branch, Academy of Sciences of the USSR, Novosibirsk. V. N. Sukachev Forestry and Wood Institute, Siberian Branch, Academy of Sciences of the USSR, Krasnoyarsk. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 638–641, September–October, 1990.     

Synthesis and properties of 3-cyanopyridine-2(1H)-chalcogenones. Review

Data published over the last 10 years on the synthesis, reactivity, and biological activity of 3-cyanopyridine-2(1H)-chalcogenones are reviewed. N. D. Zelinskii Institute of Organic Chemistry, Russian Academy of Sciences, Moscow Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 5, pp. 579–609, May, 1999.     

Structure and stability of the SiH3O2: Radical

A quantum chemical ab initio study of the electronic structure and force constants of the SiH₃O ₂ ^. radical is reported. The minimum on the potential surface corresponds to a C_s symmetry structure (the²A¹¹ term). The Hartree-Fock solution with the minimal energy for this structure does not satisfy the aufbau principle. The calculated enthalpy of SiH₃O ₂ ^. formation from SiH ₃ ^. and O₂(³∑_g ^-) is approximately −30 kcal/mole. Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences. Novosibirsk Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences. Institute of Catalysis, Siberian Branch, Russian Academy of Sciences. Translated fromZhurnal Strukturnoi Khimii, Vol. 35, No. 1, pp. 25–30, January–February, 1994. Translated by L. Smolina     

Molecular and crystal structure of the germacranolide argolide from Artemisia glabella

The new germacranolide argolide has been isolated from the epigeal part ofArtemisia glabella, and its structure has been shown by its conversion into oxopelenolide B. From the results of an x-ray investigation it is suggested that argolide has the spatial structure of 3-oxo-4α,7α,6β(H)-germacra-1(10),11(13)-dien-6,12-olide. Institute of Organic Synthesis and Coal Chemistry, Kazakh Academy of Sciences, Karaganda. A. N. Nesmeyanov Institute of Organometallic Chemistry, Russian Academy of Sciences, Moscow. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 653–657, September–October, 1991.     

2,6-Dihydroxy-4-methoxyacetophenone 2-O-β-D-gentiobioside from the roots of Dorema aitchisonii

V. L. Komarov Botanical Institute, Russian Academy of Sciences, Leningrad. Translated from Khimiya Prirodnykh Soedinenii, No. 5, p. 718, September–October, 1991.     

1H NMR in CaCl2·xH2O nanocrystals and water sorption isobars in a CaCl2-silica gel system

Mobility of water molecules in nanocrystals and other phases of CaCl₂·xH₂O (x=0–12) formed in the nanopores of silica gel during sorption of water vapor is studied by¹H NMR. The sorption properties of calcium chloride impregnated in the pores of micro- and mesoporous silica gels were measured. Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences. G. K. Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences. Translated fromZhurnal Strukturnoi Khimii, Vol. 39, No. 2, pp. 261–266, March–April, 1998. This work was supported by RFFR grants No. 96-03-33069 and 97-03-33533 and NATO grant HTECH LG N 970330.     

Triterpene glycosides of Astragalus and their genins XXXII. Cyclocarposide from Astragalus coluteocarpus

A new triterpene glycoside of the cycloartane series, which has been called cyclocarposide, has been isolated from the epigeal part of the plantAstragalus coluteocarpus Boiss. (Leguminosae). The structure of cyclocarposide has been established on the basis of chemical transformations and spectral characteristics as 20R,24S-epoxycycloartane-3β,6α,16β,25-tetraol 6-0-α-L-rhamnopyranoside 3-0-α-D-xylopyranoside. Institute of Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Pamir Biological Institute, Academy of Sciences of the Tadzhik SSR, Khorog. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 653–656, September–October, 1990.     

A chemical study of plants of the Mongolian flora the flavonoids of two species of Oxytropis

Institute of Chemistry, Mongolian Academy of Sciences, Ulan-Bator. Institute of the Chemistry of Plant Substances, Uzbekistan Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 722–723, November–December, 1992.     

Berberis alkaloids XIV. Dynamics of the accumulation of alkaloids in Berberis oblonga

Andizhan State Medical Institute. Institute of Chemistry of Plant Substances, Uzbekistan Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 597–598, September–October, 1992.     

Triterpene glycosides of Scabiosa soongorica. V. β-Sitosterol β-D-glucopyranoside and songoroside A

Institute of Organic Chemistry, Academy of Sciences of the Kirgiz SSR, Frunze. Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodynkh Soedinenii, No. 6, pp. 885–886, November–December, 1988.