Physics and Chemistry of the Hydrogen Fluoride Production Process from Fluorine Containing Waste

The impact of the aluminum industry wastes on the environment is established. The resource efficient method of aluminum industry fluorine-containing wastes processing, which includes wastes oxidizing roasting to remove carbon component and the interaction of fluorine- containing particles with sulfuric acid in order to produce hydrogen fluoride, is considered. The economic and environmental effect of the proposed processing method is substantiated

New Synthesis of Tetrahydroisoquinolines

Abstract: The reaction of cyclohexylidenecyanothioacetamide with N,N-dimethylformamide dimethyl acetal was studied. This transformation, depending on the reaction conditions, leads to different results: when the starting reagents are refluxed without a solvent, 3-(methylsulfanyl)-5,6,7,8-tetrahydroisoquinoline-4-carbonitrile is formed, and refluxing in benzene leads to 2-cyano-3-(dimethylamino)prop-2-enethioamide. The structure of these products was studied by XRD analysts. © 2022, Pleiades Publishing, Ltd

Alkylation of Malononitrile and its Dimer with α-Bromketones

Abstract: The alkylation of malononitrile and its dimer with α-bromoketones was studied. Substituted furans and pyrroles were synthesized. Their molecular and crystal structures were studied by XRD. © 2022, Pleiades Publishing, Ltd

Synthesis of 2-Alkylsulfanyl-6-amino-4-aryl-5-cyanonicotinonitriles by Recyclization of 2,6-Diamino-4-aryl-3,5-dicyano-4Н-thiopyrans with Alkyl Halides

2,6-Diamino-4-aryl-3,5-dicyano-4Н-thiopyrans in DMF in the presence of bases recycle into pyridine derivatives. After adding of haloalkanes diverse 2-(alkylsulfanyl)-6-amino-4-aryl-5-cyano-nicotinonitriles are formed. © 2018, Pleiades Publishing, Ltd

Multicomponent Synthesis and Molecular and Crystal Structure of New Derivatives of Partially Hydrogenated Quinolines

Abstract: The multicomponent condensation of aromatic aldehydes, cyanothioacetamide, 1-(cyclohex-1-en-1-yl)azepine, and α-halocarbonyl compounds was studied. As a result, new derivatives of partially hydrogenated quinolines were synthesized. The molecular and crystal structures of a number of the synthesized heterocycles were studied X-ray analysis. © 2021, Pleiades Publishing, Ltd

Multicomponent synthesis and molecular structure of 3-amino-2-aroyl(alkoxycarbonyl, arylcarbamoyl)-4-aryl(hetaryl)-5-arylcarbamoyl-6-methylthieno[2,3-b]pyridines

[Figure not available: see fulltext.] A new, effective method has been developed for the synthesis of functionalized thieno[2,3-b]pyridines by multicomponent condensation reactions of aromatic and heteroaromatic aldehydes, cyanothioacetamide, acetoacetanilides, and alkylating agents containing activated methylene groups. The structures of 3-amino-2-benzoyl-4-(furan-2-yl)-6-methyl-N-phenylthieno[2,3-b]pyridine-5-carboxamide, 3-amino-N2-(4-bromophenyl)-N5-(4-chlorophenyl)-6-methyl-4-(3-methylthiophen-2-yl)thieno[2,3-b]pyridine-2,5-dicarboxamide, and 3-amino- 4-(2-chlorophenyl)-N-(4-chlorophenyl)-6-methyl-2-(4-methylbenzoyl)thieno[2,3-b]pyridine-5-carboxamide were studied by X-ray structural analysis. © 2019, Springer Science+Business Media, LLC, part of Springer Nature

Synthesis and Properties of 3-Substituted 2H-Chromen-2-ones

Abstract: The condensation of salicylaldehyde with CH acids [p-methoxyacetoacetanilide, ethyl3-amino-3-sulfanylidenepropanoate, 3-amino-N-aryl-3-sulfanylidenepropanamides, and ethyl 2-(1,3-thiazol-2- and-4-yl)acetates] afforded 3-substituted chromen-2-ones. Some properties of theproducts were studied. The structures of3-[4-(4-chlorophenyl)-1,3-thiazol-2-yl]-2H-chromen-2-one, 2-oxo-2H-chromene-3-carboxamide, and 2-imino-N-(2-methoxyphenyl)-2H-chromene-3-carboxamide were determined by X-ray analysis. © 2020, Pleiades Publishing, Ltd

Multicomponent Synthesis of Thiazole, Selenazole, Pyrane, and Pyridine Derivatives, Initiated by the Knoevenagel Reaction

(2E,2′E)-3,3′-(Propane-1,3-diyl)bis[oxy(4,1-phenylene)]bis[2-(4-aryl-1,3-thiazol-2-yl)acrylonitriles] and functionally substituted pyridines and fused pyrans containing a 3-[1,3-thi(selen)azol-2-yl]-substituent were synthesized by multicomponent condensations initiated by the Knoevenagel reaction. The structures of 2-amino-5-oxo-4-(1-phenylethyl)-4,5-dihydropyrano[3,2-c]chromene-3-carbonitrile and 2-amino-7-hexyloxy-4-cyclohexyl-4H-chromene-3-carborutrile were studied by X-ray diffraction analysis. © 2019, Pleiades Publishing, Ltd