Synthesis of a disaccharide of phenolic glycolipid from Mycobacterium leprae (PGL-I) and its conjugates with bovine serum albumin

Russian Chemical Bulletin - Terminal disaccharide fragment of phenolic glycolipid from Mycobacterium leprae (PGL-I) was synthesized as a glycoside with 4-(2-aminoethoxy)phenyl aglycon. The obtained...     

Synthesis of the pentasaccharide repeating unit of the O-specific polysaccharide from salmonella strasbourg

The pentasaccharide α - Tyv - (1→3) - β - d - Man - (1→4) - α - l - Rha - (1→3) - d - Gal - (4←1) -α - d - Glc 1, the repeating unit of the O-specific polysaccharide chain of the lipopolysaccharide from S. Strasbourg, was obtained by glycosylation of benzyl - 2,6 - di - O - benzyl - 4 - O - (2,3,4 - tri - O - benzyl - 6 - O - benzoyl - α - d - glucopyranosyl) - β - d - galactopyranoside with 1,2 - methylorthoacetyl - 3 - O - acetyl - 4- O - [3 - O - (2,4 - di - O - acetyl - 3, 6 - dideoxy,- α - d - arabino - hexopyranosyl) - 2,4,6 - tri - O - acetyl - β - d - mannopyranosyl] - β - l - rhamnopyranose 3 followed by removal of protecting groups. The structure of the synthetic pentasaccharide was proved by methylation analysis and ¹³C NMR.     

Synthesis of 2-ethyl-1,6-dioxaspiro[4.4]-nonane,the major component of the pheromone of the chalcograph beetle pityogenes chalcographus (L.)

Conclusions A synthesis was reported for 2-ethyl-1,6-dioxaspiro[4.4]nonane (chalcograne), which is an aggregational pheromone for thePityogenes chalcographus (L.) bark beetle.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 2, pp. 325–328, February, 1982.     

Synthesis of lipooligosaccharides related to nodulation factors ofRhizobium sp. NGR234

Trisaccharide analogs of natural nodulation factors fromRhizobium sp. NGR234, namely, 2-acetamido-2-deoxy-4-O-(2-deoxy-2-hexadecanamido-β-d-glucopyranosyl)-6-O-(2-O-methyl-α-l-fucopyranosyl)-d-glucopyranose and its derivatives containing a 4-O-acetyl or a 3-O-sulfo group at thel-fucose residue, were synthesized. The oligosaccharides synthesized were shown to posses biological activity. Laboratoire de Biologie Moléculaire des Plantes Supérieures (LBMPS), Université de Genève, 1 ch. de l'Impératrice, 1292 Chambesy-Genève, Suisse. Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya No. 3, pp. 513–518, March, 1998.     

(±)-14α-Hydeoxy-19-nor-D-homotestosterone and its 17aα-OH epimer

Conclusions A synthesis of (±)-14-hydroxy-19-nor-D-homotestosterone (VI) and its 17a-OH epimer (VII) was carried out starting from the 3-methyl ether of 14-hydroxy-D-homoestrone (I).Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 6, pp. 1356–1357, June, 1969.     

Variants of the complete synthesis of d,l-estrone from 1-vinyl-6-methoxytetralol and 2-methylcyclopentane-1,3-dione

Summary Various routes for the synthesis of the methyl ether of d,l-estrone (XI) and of d,l-estrone itself (XIII) have been investigated. The best results were obtained by synthesis according to the route IV V VI I X XI XIII, when the yield of the methyl ether of d,l-estrone (XI) was 25% and that of d,l-estrone 13%, calculated on the basis of 6-methoxytetralone.Khimiya Prirodnykh Soedinenii, Vol. 1, No. 3, pp. 172–180, 1965     

Behavior of nitrite forms of nitrosylruthenium on extraction and back extraction of heterometalic Ru/Zn complexes with trioctylphosphine oxide

The state of ruthenium in conjugated phases upon extraction of trans-[Ru(¹⁵NO)(¹⁵NO₂)₄(OH)]^2? complex with tri-n-octylphosphine oxide (TOPO) in the presence of Zn²⁺ and subsequent back extraction with H¹⁵NO₃ and NH₃(concd.) solutions was studied by ¹⁵N NMR. Binuclear complexes [Ru(NO)(NO₂)_5?n (μ-NO₂) _n?1(μ-OH)Zn(TOPO) _n ] and [Ru(NO)(NO₂)_4?n (ONO)(μ-NO₂) _n?1(μ-OH)Zn(TOPO) _n ], where n = 2, 3, are predominant forms in extract. Kinetic restrictions for ruthenium extraction with TOPO solution in hexane and its back extraction with aqueous solutions of nitric acid and ammonia are eliminated in the absence of direct coordination of extractant to ruthenium. fac-Dinitronitrosyl forms [Ru(NO)(H₂O)₃(NO₂)₂]⁺, [Ru(NO)(H₂O)₂(NO₂)₂(NO₃)]⁰ (3 and 6 M HNO₃) and [Ru(NO)(H₂O)(NO₂)₂(NO₃)₂]^? (6 M HNO₃) prevail in nitric acid back extracts. Equilibrium constant at ambient temperature (0.05 ± 0.01) was assessed for the coordination of second nitrate ion to nitrosylruthenium dinitronitrato complex. Complex species [Ru(NO)(NO₂)₄(OH)]^2? and [Ru(NO)(NO₂)₃(ONO)(OH)]^2? prevail in ammonia back extract.