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Article
Synthesis, structure, and biological properties of some 8α analogues of steroid estrogens with fluorine in position 2
A total synthesis of 8α analogues of steroid estrogens with fluorine in position 2 was achieved. Structural features of these compounds were studied by the example of 17β-acetoxy-2-fluoro-3-methoxy-8α-estra-1,...
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Article
Oxidative Addition of N-Aminophthalimide to Conjugated and Nonconjugated Alkylazoalkanes
A series of γ,δ-unsaturated azo compounds was prepared by thermal isomerization of allylalkylhydrazones obtained from the simplest carbonyl compounds. The oxidation of N-aminophthalimide with lead tetraacetate in...
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Article
Reaction of phthalimidonitrene with phenylbutenynes
The addition of phthalimidonitrene with phenylbutenynes proceeds exclusively at the double bond and leads to derivatives of 1-phthalimido-2-ethynylaziridine in high yield. The observed chemoselectivity of this...
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Article
Connection between the variability of BL Lac in the radio and optical ranges
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Article
Reactions of phthalimidonitrene with conjugated enamines. Synthesis of 1-amino-2-ethynylaziridine
Addition of phthalimidonitrene to 1-(1-octynyl)- and 1-(phenylethynyl)-cyclopentene takes place exclusively at the double bond to give the bicyclic N-phthalimidoaziridines in ∼40% yield.
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Article
Reaction of 4-arylidene-3-methyl-1-phenyl-5-pyrazolones with amines
The reaction of primary and secondary amines with 4-arylidenepyrazolones gives the corresponding ammonium salts of 4,4′-benzylidenebis-5-pyrazolone derivatives but not adducts on the exocyclic C=C bond as was ...
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Article
Thermal performance of the cooling system of a 5000-m3 blast furnace
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Article
Automatic monitoring of heat losses in blast-furnace cooling systems
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Article
Wear resistance of shot peener blades of steel Kh12F1
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A change in the phase composition of steel Kh12F1 and an increase of the dislocation density in α and γ phase...
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Article
Investigations in the field of oxygen-containing heterocycles
2-(4′-Chloro-2′-methyl-2′-butenyl)tetrahydropyran and 2-(4′-chloro2′, 3′-dimethyl-2′-butenyl)tetrahydropyran react with organomagnesium compounds and also with sodium amalgam with the formation of mixtures of ...
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Article
Investigations in the field of oxygen-containing heterocycles
In the presence of SNCl4, 2-chlorotetrahydrofuran adds to isoprene, dimethylbutadiene, piperylene, and bivinyl in the 1,4 position with the formation of the corresponding allyl chlorides. In the case of bivinyl, ...
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Article
Peculiarities in the hydrogenation of alkenylfurans with a double bond situated in the 2, 3 position to the ring
Up to the present there has been no doubt about the possibility of selective hydrogenation of the side chain double bond in alkenylfurans [1]. In particular, catalysts consisting of palladium on carriers (SrCO3 [...
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Article
Researches on compounds with oxygen in the heterocyclic ring
Alkylation of furan and sylvan with 2-phenyl-2-chloropropane and cinnamyl chloride, and alkylation of sylvan with tert-butyl chloride in the presence of zinc chloride and zinc acetate are described.
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Article
Hydrogenation of alkenylfuran-maleic anhydride adducts
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Article
Substituted lactones and their reactions
Hydrogenation of δ-methyl-γ-alkyl-δ-valerolactones with copper-chromium catalyst at 230°–250° gives 2-methyl-3-alkyltetrahydropyrans. Reduction of these lactones at 140°-170° gives 3 alkylhexane-2, 6-diols.
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Article
Researches on oxygen ring compounds
Treatment of furfuryl acetate with equilibrium mixtures of 1, 2 and 1, 4 hydrochlorides of isoprene and dimethylbutadiene respectively give 2-(3-rnethylbuten-2-yl)-5-acetoxymethylfuran and 2-(2, 3-dimethylbute...
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Article
Researches on oxygen ring compounds
Treatment of sylvan with equilibrium mixtures of 1, 2- and 1, 4-hydrochlorides of isoprene and dimethylbutadiene in the presence of zinc chloride and acetate gives the 2-methyl-5-alkenylfurans corresponding to...
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Article
Substituted lactones and their transformations; IV. Hydrogenation of substituted lactones to alkyltetrahydrofurans
To make a comparative study of the connection between odor and structure in the alkyl-γ-butyrolactone and alkyltetrahydrofuran series, α-,γ-, and α,γ-dialkylbutyrolactones are hydrogenated over copper-chromium ca...