[en] The review discusses the literature data on a new method for the synthesis of 4-imidazolones, proposed in 2004, in which organosilicon compounds such as dimethyldichlorosilane, trimethyldichlorosilane, hexamethyldisilazane and bis-trimethylsilylacetamide were used as dehydrating agents. Their suitability for the synthesis of both 2,5-disubstituted and 2,3,5-trisubstituted 4-imidazolones is shown. The possibility of carrying out multistage syntheses with the participation of involving these agents in one reactor is described. Data on the side effects of this method are also provided

No abstract available

[en] In each chapter, except chapter 1, methods are reviewed for isotopic labelling certain groups of organic compounds. refs.; figs.; tabs

[en] The data on the synthesis, structure and chemical transformations of 2-(het)arylhydrazono-1,3-dicarbonyl compounds is surveyed. The synthetic potential and possible applications of the title compounds are analyzed.

[en] As a part of a department of development of various typed organic-inorganic nano-complex using gamma irradiation for nano-leveled pesticide delivery system (PDS), we are investigating for advanced various types of customized nanomaterials development in bioindustry fields. Specially, we described herein, preparation of various types of nano-Ag associated complexes and results are presented

[en] 1-Amino-3,3-dimethyl-3,4-dihydro-naphthalene-2-carboxylate (aminoether) in the medium of low-boiling alcohols (methanol, ethanol, isopropanol) was reacted with propyl isothiocyanate. It was found that the best yields were obtained when the reaction was carried out at the boiling point of the solvent. When the reaction is carried out for 18-20 hours, the formed ethyl 3,3-dimethyl-1-(3-propylthioureido)-3,4-dihydronaphthalene-2-carboxylate under the reaction conditions is partially cyclized to 5,5-dimethyl-3-propyl-2-thioxo-2,3,5,6-tetrahydrobenzo[h]quinazoline-4(1H)-one (thioxobenzoquinazoline) in a 1:1 ratio. To increase the yield of thioxobenzoquinazoline, the resulting mixture was treated with a solution of caustic potash, which led to the production of thioxoquinazoline with a yield of 40%. The alkylation of thioxobenzoquinazoline in the presence of caustic potash with halides of various structures in absolute ethanol led to 2-alkylthio-5,5-dimethyl-3-propyl-5,6-dihydro-benzo[h]quinazoline-4(3H)-ones with yields of 48-83%. As a result of condensation of thioxobenzoquinazoline with 2-aminoethanol in excess of the amine, 2-(2-hydroxyethylamino)-5,5-dimethyl-3-propyl-5,6- dihydroben-zo[h]quinazoline-4(3H)-one was synthesized. The antibacterial activity of the compounds was studied by ―diffusion in agar‖ at a microbial load of 20 million microbial bodies per 1 ml of medium. Gram-positive staphylococci (St. Aureus 209p, Bac.subtilis) and gram-negative rods (Sh. Flexneri 6858, E. coli 0-55) were used as test objects. As a result of the research, it was found that the studied compounds had weak or moderate antibacterial activity

No abstract available

[en] • The work described here relies on organic compounds used in the nuclear cycle (extractants, diluents and specific additives) to provide a valuable information about the origin and process of nuclear materials. • When used in headspace mode, MONOTRAP is an efficient method to capture trace-level volatile and semi-volatile organic markers from small amounts (10 – 100 mg) of uranium ore concentrates (UOCs). • MONOTRAP is easy to implement in the field for control of nuclear material in the context of nuclear safeguards, without any contact with the radioactive samples, avoiding radiological contamination controls. • When combined with the high-resolution power and mass accuracy of a GC/Q-TOF mass analyzer, using both electron impact and chemical ionization and a comprehensive search against our “in-house” spectral database of “non-proliferation” organic chemical markers: this new method has the potential to facilitate the identification of nuclear production processes and thus to verify the correctness and the completeness of the declarations made by the States about their nuclear material and activities. (author)

[en] This book deals with nomenclature on an organic compound except carbon, hydrogen, oxygen, nitrogen, halogen, sulfur, selenium and tellurium. It mentions introduction, nomenclature system, coordination compound, an organo-metallic compound, homogeneous chains and rings with regular form of heteroatoms, organic compound including arsenic, phosphorus and bismuth, stereochemistry, nomenclature of compound related a natural substance, modified compound in to an isotope. The last chapter has recommendation on general principle and instruction for nomenclature.

[en] This paper presents research results regarding acid hydrolysis of Acacia mangium wood sawdust forming xylose for further production of furfural. The optimization of the hydrolysis process in a hydrolyzer and pilot scale was studied. Optimal conditions of the hydrolysis were established as follows: temperature was increased from 100 to 140 ℃ within approx. 35 min, retention time at the maximum temperature was 25-50 minutes, sulfuric acid concentration of 0.75 %, solid-to-liquor ratio of 1:8. Under these conditions, xylose yield was 7.59 % over the oven dried amount of the wood sawdust used. The glucose (0.93 % w/w) and furfural (0.33 % w/w) were obtained as by-products of the hydrolysis process. The furfural synthesis from the obtained xylose was successfully carried out. (author)