Isoprenoids of Gossypium Leaves and Their Effect on the Functional Activity of Cotton-Sprout Nuclei

A method of isolating the total isoprenoids and their separate components from cotton leaves was developed. Their effect on the level of protein biosynthesis by cotton-sprout nuclei was found to be greater in vivo than in vitro. -Tocopherol was found to be the most active among them.     

Investigation of the dynamics of the accumulation of some secondary metabolites of cottonplant leaves

The compositions of the secondary metabolites (SMs) of the leaves and petioles of cotton plants of the deciduous and selection lines L-275, L-470, L-475, and 142-F and the variety Tashkent-1 have been studied. It has been shown that the level of -tocopherol and polyprenols in the leaf blades and petioles changes fairly sharply according to the phases of ontogenesis. The results of an exogenous treatment of the leaves of cotton plants of the control varieties Tashkent-1 and 108-F with the SMs showed an interrelationship of deciduousness and the quantitative composition of the sterols.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Republic of Uzbekistan, Tashkent, fax (3712) 40 64 75. Translated from Khimiya Prirodnykh Soedinenii, Vol. 33, No. 1, pp. 113–117, January–February, 1997.     

1,2,4-Thiadiazol derivatives of cytisine alkaloid: solvate formation and phase transitions

1,2,4-Thiadiazol derivatives of cytisine alkaloid—N-(3-methylthio-1,2,4-thiadiazol-5-yl-aminocarbonylmethyl) (1), N-(3-ethylthio-1,2,4-thiadiazol-5-yl-aminocarbonylmethyl) (2), N-(3-hexylthio-1,2,4-thiadiazol-5-yl-aminocarbonylmethyl) (3) cytisine have been crystallized from different solvents and by X-ray and TG–DSC method were studied. By X-ray analysis the structures of the crystal solvate of 2 with dioxane have been determined. By topology represented solvate belongs to tabulate type. In the crystal structure two conformers of the host molecules were determined. By TG–DSC method has been shown, that methyl-, ethyl-, and hexyl cytisine derivatives can exist in two phase forms. But, unlike methyl- and ethyl-derivatives, hexyl-derivative of cytisine not form inclusion compounds.     

Synthesis of carbamates of amino alcohols of pyrrolizidine and quinazolidine alkaloids

Summary Previously undescribed mono- and dicarbamates of pyrrolizidine and quinazolidine amino alcohols have been obtained by the reaction of mono- and diisocyanates with the corresponding alcohol derivatives of the alkaloids.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 765–768, November–December, 1975.     

Quinazolines

The reaction of 2-amino-4-quinazolone with unsaturated acids such as acrylic, methacrylic, dimethylacrylic, crotonic, and cinnamic acids was studied, as a result of which the previously undescribed 1,2,3,4-tetrahydropyrimido[2,1-b]quinazoline-2,6-diones were synthesized.See [1] for communication VII.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 105–107, January, 1978.     

Synthesis of some bisquaternary salts of the alkaloids loline and lolinine

Summary An investigation of the UV, IR, PMR, and mass spectra and chemical transformations of luteicine have established for it the structure of 11-hydroxy-2,13-dimethoxyhexahydro-1,13-epoxyhomoproaporphine.The structure of the base was confirmed by its partial synthesis from luteidine.V. I. Lenin Tashkent State University. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 359–363, May–June, 1976.     

Structures of crystalline mixed peganole-brompeganole systems

The structures of mixed crystals — solid solutions in the peganole-brompeganole system with molar ratios 0.72:0.28, 0.32:0.68, 0.10:0.90 and of pure peganole are determined by single crystal X-ray diffraction. It is shown that the solid solutions (mixed crystals) exist as three different phases. These crystal structures tend to form closed centrosymmetric dimers involving two molecules (probably different) joined by “anti-parallel” centrosymmetric hydrogen O-H...N(1) bonds. The development of this dimer is the cause of forming mixed crystals in the peganole–brompeganole system.