Synthesis of macrolide antibiotics Communication 2. Synthesis of the C9-C13 fragment of erythronolides A and C and megalonolide

Conclusions The synthesis of the C⁹-C¹³ fragment of erythromycin A has been accomplished, starting from levoglusan (18 steps, 3.4%).For previous communications, see [1, 2].Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 11, pp. 2561–2568, November, 1982.     

Luminescence and lasing properties of SOCl2-GaCl3-Nd3+ inorganic laser liquids

Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 50, No. 4, pp. 609–613, April, 1989.     

Synthesis of macrolide antibiotics. 16. Synthesis of erythronolides A and B by a coupling scheme of (C5-C9) + (C3-C4) + (C1-C2) + (C10) + (C11-C13) fragments and synthesis of the C5-C9 fragment

Conclusions A synthesis of a C⁵-C⁹-fragment common to erythronolides A and B was carried out starting from levoglucosan.For previous communications, see [1].Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 3, pp. 674–680, March, 1989.     

Free radical reactions of carbohydrate derivatives in the synthesis of carbocyclic compounds

The benzyloxy group at C(4) of the pyranose ring in 3,4-disubstituted and 3-deoxy carbohydrate derivatives affects the direction of intramolecular free-radical C(2)-C(6) cyclization. A possible mechanism of the formation of the tetrahydrofuran ring was proposed.For Part 3, see Ref. 1.Deceased.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 4, pp. 767–773, April, 1995.The present work was partially supported by the Russian Foundation for Basic Research (project No. 93-03-5834) and the International Science Foundation (Project No. MOM 000).     

Titanium and Iron Oxide-Based Magnetic Photocatalysts for Oxidation of Organic Compounds and Sulfur Dioxide

New approaches to designing magnetic photocatalysts on the basis of microheterogeneous structures built according to the scheme magnetic core–photocatalytic shell were proposed. A procedure for preparing the Zn_0.35Ni_0.65Fe₂O₄/SiO₂/TiO₂ catalyst designed for the destructive oxidation of organic compounds, as well as the Fe₃O₄/Fe₂O₃/Fe₄[Fe(CN)₆]₃: KCo[Co(CN)₆] and Fe₃O₄/Fe₂O₃/polyaniline catalysts designed for the photo-oxidation of SO₂, was considered. It was shown that the reduction of molecular oxygen proceeded primarily to H₂O₂, as a result of doping the polyaniline shell with 18-tungstophosphoric acid, and the quantum yield of the SO₂ photo-oxidation reaction was doubled by coupling heterogeneous photocatalysis with homogeneous catalysis (involving the hydrogen peroxide formed).