18 Result(s)

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...

V. M. Dashunin, R. V. Maeva, G. A. Samotuga… in Chemistry of Heterocyclic Compounds (1965)

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...

Yu. I. Tarnopol'skii, V. N. Belov in Chemistry of Heterocyclic Compounds (1965)

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...

Yu. I. Tarnopol'skii, V. N. Belov in Chemistry of Heterocyclic Compounds (1965)

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.

A. L. Voitsekhovskaya, V. M. Dashunin, V. N. Belov in Chemistry of Heterocyclic Compounds (1966)

Article

Hydrogenation of alkenylfuran-maleic anhydride adducts

Yu. I. Tarnopol'skii, V. N. Belov in Chemistry of Heterocyclic Compounds (1966)

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.

Yu. I. Tarnopol'skii, I. S. Shraiber, V. N. Belov in Chemistry of Heterocyclic Compounds (1967)

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 [...

Yu. I. Tarnopol'skii, V. N. Belov in Chemistry of Heterocyclic Compounds (1967)

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 ...

M. M. Tarnopol'skaya, Yu. I. Tarnopol'skii… in Chemistry of Heterocyclic Compounds (1968)

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, ...

Yu. I. Tarnopol'skii, M. M. Tarnopol'skaya… in Chemistry of Heterocyclic Compounds (1968)

Article

Wear resistance of shot peener blades of steel Kh12F1

1. A change in the phase composition of steel Kh12F1 and an increase of the dislocation density in α and γ phase...

V. N. Belov, Yu. I. Titukh in Metal Science and Heat Treatment (1974)

Article

Automatic monitoring of heat losses in blast-furnace cooling systems

V. N. Belov, A. V. Borodulin, E. E. Gavrilov, V. V. Kanaev, B. M. Neginskii… in Metallurgist (1985)

Article

Thermal performance of the cooling system of a 5000-m³ blast furnace

V. N. Belov, A. V. Borodulin, E. E. Gavrilov, V. V. Kanaev, V. A. Lozovoi… in Metallurgist (1986)

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 ...

G. Mann, D. Bendler, L. Hennig, M. A. Kuznetsov… in Chemistry of Heterocyclic Compounds (1988)

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.

V. N. Belov, V. R. Denisov, M. A. Kuznetsov in Chemistry of Heterocyclic Compounds (1988)

Article

Connection between the variability of BL Lac in the radio and optical ranges

V. N. Belov, V. A. Gagen-Torn, S. G. Marchenko in Astrophysics (1989)

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...

M. A. Kuznetsov, V. V. Semenovskii, V. N. Belov… in Chemistry of Heterocyclic Compounds (1989)

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...

M. A. Kuznetsov, V. N. Belov, S. M. Buchaka in Russian Journal of Organic Chemistry (2005)

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,...

V. N. Belov, V. Yu. Dudkin, E. A. Urusova… in Russian Journal of Bioorganic Chemistry (2007)