Structure of isosophoridine

A complete x-ray study of the structure of a stereoisomer of the alkaloid matrine -isosophoridine - has been made. Rings A and B have the cis type of linkage. Rings A, B, and C have the chair form and D the half-chair form.Institute of Bioorganic Chemistry, Academy of Sciences of The Uzbek SSR, Tashkent Institute Institute of Crystallography, Academy of Sciences of the USSR, Moscow and V. I. Lenin Tashkent State University. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 460–465, July–August, 1981. Original article submitted February 2, 1981.     

Structure of lehmannine N-oxide

The molecular and crystal structure of lehmannine in its monohydrate has been studied by x-ray structural analysis. Rings A, B, and C have the chair form and ring D the half-chair form in which the deviations of the atoms from their mean-square plane does not exceed 0.06 Å.Institute of Bioorganic Chemistry, Academy of Sciences of the Uzbek SSR, Tashkent. Institute of Crystallography, Academy of Sciences of the USSR, Moscow. V. I. Lenin Tashkent State University. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 757–763, November–December, 1981.     

Carbohydrates of cultivated varieties ofAlthea rosea

The polysaccharides of three cultivated varieties ofAlthea rosea have been investigated. The amounts of water-soluble polysaccharides and pectin substances in various organs of the plant have been determined. It has been shown that the maximum amount of water-soluble polysaccharides and pectin substances is present in the flowers. Their monosaccharide compositions have been studied. The physicochemical characteristics of the pectin substances are given.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Republic of Uzbekistan, Tashkent. A. Sadykov Institute of Bioorganic Chemistry, Academy of Sciences of the Republic of Uzbekistan. Tashkent. Institute of Botany, Academy of Sciences of the Republic of Uzbekistan, Tashkent. Translated from Khimiya Prirodnykh Soedineii, No. 5, pp. 643–646, September–October, 1993.     

X-ray structural investigation of alkaloids. II. Molecular structure and absolute configuration of (?)-pseudokopsinine

Summary By a complete x-ray structural investigation, the structural formula of (–)-pseudokopsinine has been refined and its absolute configuration has been determined.Institute of Heteroorganic Compounds, Academy of Sciences of the USSR, Moscow. Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 197–206, March–April, 1976.     

Synthesis and membrane activity of new derivatives of 2,3-benzo-18-crown-6

The acylation of 2,3-benzo-18-crown-6 with carboxylic acids in the presence of polyphosphoric acid has given new acyl derivatives which have been reduced to the corresponding alkyl derivatives. The ionophoric activities of the compounds have been investigated on mitochondrial membranes.Institute of Biochemistry, Academy of Sciences of the Uzbek SSR, Tashkent. Institute of Bioorganic Chemistry, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 634–637, September–October, 1983.     

Separation of the alkaloids deoxypeganine,peganol, and deoxyvasicinone by the HPLC method

Institute of Chemistry of Plant Substances Academy of Sciences of the Uzbek SSR, Tashkent. Scientific Center for Chromatography, Academy of Sciences of the Uzbek SSR. Institute of the Chemistry and Physics of Polymers, Academy of Sciences of the Uzbek SSR, Tashkent. Iranslated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 297–298, March–April, 1991.     

Isolation and antibiotic properties of cis-hexadeca-4,7,10,13-tetraenoic acid from the algaScenedesmus obliquus UA-2-6

Summary By the method of checking antibiotic activity, conditions have been selected for the isolation of cis-hexadeca-4,7,10,13-tetraenoic acid from the fatty-acid fractions of the lipids ofScenedesmus obliquus UA-2-6. Its structure has been confirmed and it has been established that this acid possesses a broad spectrum of antibiotic action.Institute of Microbiology, Academy of Sciences of the Uzbek SSR, Tashkent. Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 379–385, May–June, 1978.     

Mass-spectrometric characteristics of the molecular species of cotton-plant phosphatidylcholine

Summary The quantitative identification of the molecular species of phosphatidylcholine in the form of their monoacetyldiglycerides has been performed by a mass-spectrometric method.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 305–307, May–June, 1978.     

X-ray structural investigation of alkaloids. III. Molecular structure and absolute configuration of (+)-excelsine

Summary On the basis of a complete x-ray structural investigation, the structural formula of (+)-excelsine has been refined and its absolute configuration has been determined.Institute of Heteroorganic Compounds, Academy of Sciences of the USSR, Moscow. Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 206–217, March–April, 1976.     

Total synthesis of the racemic alkaloid diptocarpamine

A route for the synthesis of racemic diptocarpamine from hex-5-enoic acid has been developed.Institute of Chemistry, Bashkir Scientific Center of the Urals Branch, USSR Academy of Sciences, Ufa. Institute of the Chemistry of Plant Substances, Uzbek SSR Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 232–236, March–April, 1989.     

X-ray structural investigation of gossypol and its derivatives. VII. Molecular and crystal structure of dianilinegossypol

A complete x-ray structural investigation of the complex of dianilinegossypol with ethyl acetate has been made and it has been shown that in these crystals the dianilinegossypol gossypol has predominantly the quinoid tautomeric form.A. S. Sadykov Institute of Bioorganic Chemistry, Uzbek SSR Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 661–666, September–October, 1988.     

Stereospecific analysis of the triacylglycerols of a cottonseed oil hydrogenate and its fractions

A cottonseed oil hydrogenate has been fractionated into three fractions: high-melting, medium-melting, and liquid. It has been established that the fat of the second fraction, because of its physicochemical indices, consistency, and the distribution of the saturated fatty acyl radicals in the extreme positions of the TAG molecules, can be regarded as a cocoa butter substitute.Institute of the Chemistry of Plant Substances of the Uzbek SSR Academy of Sciences, Tashkent. Institute of Bioorganic Chemistry of the Uzbek SSR Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 509–513, July–August, 1987.     

Molecular and crystal structure of tetrahydroneosophoramine

The structure of tetrahydroneosophoramine has been studied by x-ray structural analysis. Rings A, B, and C have the chair conformation, and ring D the half-chair conformation. On the basis of a semiquantitative analysis it has been shown that the strains in the molecules of tetrahydroneosophoramine and of matrine are of the same order of magnitude.Institute of Bioorganic Chemistry, Academy of Sciences of the Uzbek SSR, Tashkent. Institute of Crystallography, Academy of Sciences of the USSR, Moscow. V. I. Lenin Tashkent State University. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 751–757, November–December, 1981.     

Electrohydraulic effect in water-plant heterodisperse systems I. Compositions of the solid residue and the aqueous phase

The electrohydraulic (EH) treatment of water-plant heterodisperse systems leads to the partial degradation of the main components of the plant materials: lignin, cellulose, and carbohydrates. The presence of p-hydroxyphenyl and guaiacyl structures has been established on the basis of the results of the GLC analysis of the ether-extracted phenolic products of plant materials subjected to EH treatment. It has been shown that part of the carbohydrates passes into the aqueous phase in the form of free monosaccharides: pentoses and hexoses.Institute of Chemistry of Plant Substances of Uzbekistan Academy of Sciences, Tashkent. Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, Irkutsk. Siberian Institute of Terrestrial Magnetism, the Ionosphere, and the Propagation of Radio Waves, Siberian Branch, Russian Academy of Sciences, Irkutsk. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 707–711, November–December, 1992.     

Synthesis of the racemic alkaloid diptocarpilidine

A convenient approach to the synthesis of the racemic alkaloid diptocarpilidine from the readily available l-hydroxy-7-thiaoctane has been developed.Institute of Chemistry, Bashkir Scientific Center, Urals Branch Academy of Sciences of the USSR, Ufa. Institute of Chemistry of Plant Substances, Academy of Sciences of the Ubzek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 261–263, March–April, 1991.     

Zeravshanisine — A new alkaloid from Aconitum zeravschanicum

The new diterpene alkaloid zeravshanisine has been isolated from the epigeal part ofAconitum zeravschanicum Steinb.. Its structure has been established by spectral methods and by x-ray structural analysis as 2-acetyl-13-benzoyl-14-hydroxyhetisine.Institute of Chemistry of Plant Substances, Uzbekistan Republic Academy of Sciences, Tashkent. Institute of Organometallic Compounds, Russian Academy of Sciences, Moscow. Translated from Khimiya Prirodnykh Soedinenii, Nos. 3,4, pp. 375–382, May–August, 1992.     

Synthetic analogues of Peganum alkaloids VII. Bromine-substituted quinazoline alkaloids and their analogues

The quinazoline bases pentamethylenequinazoline and peganol react with bromosuccinimide in glacial acetic acid to form the corresponding 6-bromoquinazoline derivatives. Some by-products of the bromination reaction have been isolated and characterized. 6-Bromopeganol has been subjected to x-ray structural analysis.Institute of Chemistry of Plant Substances, Uzbekistan Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 233–240, March–April, 1992.     

Purification of crude cottonseed oil and technical gossypol on a chitin sorbent

It has been shown that the use of chitin (technical), which is a production waste, as adsorbent permits the clarification of black cottonseed oil and the purification of technical gossypol.Institute of the Chemistry of Plant Substances, Uzbek Academy of Sciences, Tashkent. A. N. Nesmeyanov Institute of Organometallic Compounds, Russian Academy of Sciences, Moscow. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 753–758, November–December, 1991.     

Transformations of alkaloids of the quinazolin-4-one group in the animal organism

Summary It has been found by chromato-mass spectrometry that the main product of the transformation of deoxy-vasicinone excreted with rat urine in the unbound form is vasicinone. Vasicinone used as a drug is excreted predominantly in the unchanged form.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 250–254, March–April, 1977.