Insect phermones and their analogues XXXIX. Synthesis of 11RS-hydroxy- and 12-hydroxydodec-3Z-enoic acids — Acyclic precursors of the macrolide components of the pheromones of Cryptolestes ferrugineus and C. pusillus

A new approach to the synthesis of 11RS-hydroxy- and 12-hydroxydodec-3Z-enoic acids has been developed with the use, in one of the key stages, of the partial ozonolysis of the acetates of the corresponding methylene-separated enynic alcohols.Institute of Organic Chemistry, Urals Branch, Russian Academy of Sciences, Ufa. Translated from Khimiya Prirodnykh Soedinenii, Nos. 3,4, pp. 417–422, May–August, 1992.     

Adsorption of some phosphorus oxy anions on copper

Conclusions The radioactive isotope method was used to study the adsorption of various anions of phosphoric, phosphorous, and hypophosphorous acids on negatively and positively charged copper, and it was shown that the corresponding adsorption values change oppositely to the sums of the absolute values of the charges of all of the atoms of the anion, which were calculated by the CNDO/2 method.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 9, pp. 2121–2124, September, 1977.     

Changes in the strength of gamma-irradiated cellulose during storage

A comparison of the physicochemical properties of irradiated specimens of cotton and viscose fibers, stored for long periods at various temperatures, with the properties of the starting specimens has revealed reversible effects consisting in the recovery of the strength and heat of wetting of the starting fibers.Tashkent Lenin State University. Translated from Mkhanika Polimerov, No. 5, pp. 941–944, September–October, 1970.     

Insect pheromones and their analogues

A stereospecific synthesis has been achieved of tetradec-11E-enal and of tetradec-11E-en-l-ol and its acetate — components of the pheromones of many species of insects of the order Lepidoptera — from the readily available undecenoic acid, using the Knoevenagel reaction and catalytic hydroalumination.Institute of Chemistry, Bashkir Scientific Center, Urals Branch, Russian Academy of Sciences, Ufa. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 272–276, March–April, 1992.     

Symbolic Computation of the Averaged Hamiltonian Describing the Motion of Asteroids under the Influence of Major Planets

A semianalytic theory of motion of minor planets is constructed by means of the Lie-series method involving the Le Verrier expansions of the planetary disturbing function. The averaging procedure is realized symbolically by means of the computer algebra system MAPLE. The averaged Hamiltonian is used for symbolic computation of the right-hand parts of the canonical differential equations of motion. The equations are integrated numerically by means of traditional numerical software. Bibliography: 9 titles.     

Insect pheromones and their analogs

A highly selective synthesis of 2-methyl-cis-7, 8-epoxyoctadecane — the racemic analog of the sex pheromone of the gypsy moth Porthetria dispar L. — (Z)-disparlure — has been developed that is based on the functionally differentiated partial ozonization of cycloocta-IZ.5Z-diene.Institute of Petroleum and Catalysis, Academy of Sciences of the Republic of Bashkortostan, 450075, Ufa, Prospekt Oktyabrya, 141. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 901–904, November-December, 1995. Original article submitted February 21, 1995.     

Synthesis of macrolide pheromones

This review considers pathways for the synthesis of macrocyclic lactones (macrolides) identified as components of pheromones of insects of the order Coleoptera (Cucujidae), genera Cryptolestes and Oryzaephilus —granary pests.Institute of Petrochemistry and Catalysis, Academy of Sciences of the Republic of Bashkortostan, Ufa. Institute of Organic Chemistry, Ufa Scientific Center, Russian Academy of Sciences, Ufa. Institute of Fine Organic Synthesis, Academy of Sciences of the Republic of Bashkortostan, Ufa. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 526–548, July–August, 1995. Original article submitted July 15, 1994.