A mass-spectrometric study of insect pheromones. II. Epoxy compounds

The mass spectra of epoxy compounds have been studied and the positions of the epoxy rings and their configurations have been shown.V. I. Lenin Tashkent State University. A. S. Sadykov Institute of Bioorganic Chemistry, Uzbekistan Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 130–135, January–February, 1992.     

X-ray structural investigation of a derivative of the alkaloid kesselringine

The molecular and crystal structures of 2,6-dimethyl-12-demethylkesselringine methosulfate have been determined by x-ray structural analysis. The relative configurations of the chiral centers in the R, S nomenclature have been established.Institute of Bioorganic Chemistry, Academy of Sciences of the Uzbek SSR, Tashkent; V. I. Lenin State University, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 89–92, January–February, 1986.     

Oxidation of hexadec-11Z-en-1-ol by Cr(VI) reagents on polymeric supports

A method is proposed for the oxidation of hexadec-11Z-en-1-ol to hexadec-11Z-enal by Cr(VI) reagents on polymeric supports.A. S. Sadykov Institute of Bioorganic Chemistry, Uzbek Academy of Sciences, Tashkent. V. I. Lenin Tashkent State University. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 252–255, March–April, 1990.     

Stereospecificity of a lysophospholipase from the venom ofVespa orientalis

Institute of the Chemistry of Plant Substances, Academy of Sciences of the Republic of Uzbekistan, Tashkent, fax (3712) 89 14 75. Institute of Physiology and Biophysics, Academy of Sciences of the Republic of Uzbekistan, 700095, Tashkent, ul. Niyazova, 1. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 625–627, July–August, 1995. Original article submitted November 9, 1994.     

Modification of microcrystalline cellulose by a binary mixture of pyromellitic dianhydride and phosphoric acid

The reactions involved in the esteriification of microcrystalline cellulose with a binary mixture of pyromellitic dianhydride and phosphoric acid have been studied. By changing the molar ratio of dianhydride to acid it is possible to regulate the course of the reaction and to obtain products with required contents of phosphoric acid and carboxy groups.Tashkent Institute of Chemical Technology, 700034, Tashkent, ul. Shevchenko, 1. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 583–586, July–August, 1996. Original article submitted January 22, 1996.     

Alkaloids of the leaves of Cocculus laurifolius the structure of coclafine

Cocculine, isoboldine, norisoboldine, and a new erythrinan alkaloid, coclafine, for which the structure and absolute configuration of 3S,5R-3,15-dihydroxyerythrin-1(6)-ene have been established, have been isolated from the leaves ofCocculus laurifolius DC.Institute of Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Tashkent Agricultural Institute. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 84–86, January–February, 1991.     

2,10-Didemethylcolchicine — A new alkaloid from Merendera robusta

The alkaloid complex ofMerendera robusta Bge. (familyLiliaceae) growing in the Tashkent province of the Uzbek SSR has been investigated. The main alkaloids of this plant are colchicine and colchamine. Eleven tropolone alkaloids and their photochemical isomers have been isolated and identified. A new alkaloid of phenolic nature has been isolated for which the structure of 2,10-didemethylcolchicine has been established.V. I. Lenin Tashkent State University. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 67–71, January–February, 1991.     

11,13-Dihydroarteglasin A — A new guaianolide from Artemisia argyi

Institute of Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Tashkent Agricultural Institute. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 555–556, July–August, 1990.     

For the 50th anniversary of the laboratory of alkaloid chemistry,Institute of the Chemistry of Plant Substances of the Uzbekistan Republic Academy of Sciences

The present review gives the main advances made in the laboratory of alkaloid chemistry of the Institute of Plant Substances of the Usbekistan Republic Academy of Sciences [IKhRV AN RUz] (Tashkent) over 50 years in the field of the chemistry of diterpene, isoquinoline, quinoline, steroid, indole, spiropiperidine, sulfur-containing, tropane, pyrrolidine, quinazoline, quinolizidine, amaryllis, and pyrrolizidine bases and possible routes for the biosynthesis of some of these groups of alkaloids.Institute of Chemistry of Plant Substances, Uzbekistan Republic Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 3–33, January–February, 1993.     

Molecular and crystal structure of luteidine

The crystal structure of luteidine has been deciphered by x-ray structural analysis; there are two molecules in the independent part of its elementary cell. These symmetrically independent molecules differ in structure. The position of the olefinic methoxy group of luteidine has been established. Its structure has been determined as 1-hydroxy-2,12-dimethoxy-9,10-dihydrohomoaporphine.Institute of Biorganic Chemistry, Academy of Sciences of the Uzbek SSR, Tashkent, and V. I. Lenin Tashkent State University. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 348–352, May–June, 1986.     

Stereochemical enzymatic synthesis of menthyl esters

All-Union Scientific-Research Chemical and Technological Institute of the Medical Industry, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 140–141, January–February, 1991.     

Triterpene glycosides of astragalus and their genins. XXVI. Cycloartanes and sterols of Astragalus schachirudensis

Institute of the Chemistry of Plant Substances, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 136–137, January–February, 1988.     

Influence of zinc ions on cotton pyrophosphatase

V. I. Lenin Tashkent State University. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 132–133, January–February, 1990.     

Comparative study of amino acid compositions of flavoproteins of the cotton plant and of the fungus Verticillium dahliae

Institute of Experimental Plant Biology, Academy of Sciences of the Uzbek SSR, Tashkent. Tashkent Agricultural Institute. Translated from Khimiya Prirodynkh Soedinenii, No. 6, pp. 893–895, November–December, 1988.     

A mass-spectrometric study of the hydroxy acids of cottonseed oil

Eight new components of the hydoxy acids have been found in the seed oil of the cotton plant of variety Tashkent 1: six monohydroxy acids, of which three are isomeric hydroxyoctadecenoic, two are hydroxyheptadecenoic, and one is a hydroxy-octadecanoic acid, and two polyhydroxy acids — trihydroxystearic and dihydroxy-octadecinoic acids. The main acids in the combined material were 12-hydroxyoctadec-9-enoic acid and a trihydroxydecanoic acid.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 436–443, July–August, 1981. Original article submitted January 20, 1981.     

A comparative investigation of the fatty acid compositions of the seeds of a number of lines of a genetic collection of Gossypium hirsutum

A comparative analysis has been made of the amounts of lipids and their fatty-acid compositions in the seeds of the lines of agenetic collection of cotton plants of the speciesGossypium hirsutum and their hybrids and the variety Tashkent-1. The results obtained on the fatty-acid compositions of some hybrids make it possible to recommend the use of individual lines of cotton plants as donors for improving the food-value indices of cottonseed oil.Institute of Chemsitry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. V. I. Lenin Tashkent State University. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 173–176, March–April, 1991.     

Structure of the product of the reaction of 6-dehydroeldelidine with sodium in liquid ammonia

Institute of the Chemistry of Plant Substances, Uzbek SSR Academy of Sciences, Tashkent. Abu Ali ibn Sina [Avicenna] Tashkent State Medical Institute, Dushanbe. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 279–281, March–April, 1990.     

Alkaloids of Nitraria komarovii. XIV. Deoxypeganine N-oxide

Institute of Chemistry of Plant Substances, Uzbekistan Republic Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedeninii, No. 1, pp. 87–88, January–February, 1993.     

Rhamnose orthoacetates of aconitine and imperialine

The preparation and spectral properties of rhamnose orthoacetates of aconitine and imperialine are described.Tashkent Pharmaceutical Institute. Institute of the Chemistry of Plant Substances, Academy of Sciences of the Republic of Uzbekistan, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 743–746, September–October, 1993.