195 Result(s)

Article

Regioselective Synthesis of New [1,3]Thiazolo- and [1,3]Selenazolo[3,2-a]pyridinium Derivatives

The reactions of pyridine-2-sulfenyl and pyridine-2-selenenyl halides with heteroatomic vinyl compounds were used as a basis for the development of effective regioselective methods for the synthesis of new fus...

R. S. Ishigeev, S. V. Amosova, V. A. Potapov in Russian Journal of General Chemistry (2023)

Article

Testing the Hypothesis about the Existence of a Planet Orbiting the Pulsar B0329+54 (J0332+5434)

We have analyzed the results of our observations of the millisecond pulsar B0329+54 (J0332+5434), which exhibits quasi-periodic variations in the barycentric times of arrival (TOAs) of pulses on long time scal...

V. A. Potapov, S. A. Andrianov in Astronomy Letters (2023)

Article

Regioselective Reactions of Pyridine-2-sulfenyl Bromide with Vinyl and Allyl Ethers

Annulation reactions of pyridine-2-sulfenyl bromide with vinyl and allyl ethers proceeded regioselectively, but with opposite regiochemistry. Reactions with vinyl ethers led to 3-organyloxy-2,3-dihydro[1,3]thi...

R. S. Ishigeev, S. V. Amosova, V. A. Potapov in Russian Journal of General Chemistry (2022)

Article

On Long-Term Variations in Solar Wind and Solar Activity Parameters with Possible Application to the Global Climate Problem

According to the data on the 20–24 solar activity cycles, long-term variations in the annual average solar wind speed and interplanetary scintillation index are compared to Wolf number variations. It is shown ...

V. I. Vlasov, R. D. Dagkesamanskii… in Bulletin of the Lebedev Physics Institute (2022)

Article

Effect of a Synthetic Organoselenium Compound on Post-Vaccination Immunopoiesis in the Red Bone Marrow and Cell Composition of Peripheral Blood of White Mice Vaccinated with Yersinia pestis EV

We studied the effect of an experimental synthetic organoselenium compound 2,6-dipyridinium- 9-selenabicyclo[3.3.1]nonane dibromide (974zh) on the cell composition of the red bone marrow and peripheral blood i...

V. I. Dubrovina, T. P. Starovoitova… in Bulletin of Experimental Biology and Medic… (2021)

Article

One-Pot Syntheses of Functionalized Dihydrobenzoselenophenes and Selenochromans from Acetyl Eugenol and Selenium Dibromide. Rearrangement of 2-(Bromomethyl)-2,3-dihydro-1-benzoselenophene to Selenochromans

Efficient methods for the synthesis of new fused heterocyclic compounds have been developed on the basis of annulation–functionalization of acetyl eugenol with selenium dibromide. The proposed procedures make ...

M. V. Musalov, V. A. Yakimov, V. A. Potapov… in Russian Journal of Organic Chemistry (2021)

Article

One-Pot Synthesis of Functionalized 1,1′-(9-Selenabicyclo[3.3.1]nonane-2,6-diyl)dipyridinium Dibromides

Previously unknown functionally substituted 1,1′-(9-selenabicyclo[3.3.1]nonane-2,6-diyl)dipyridi­nium dibromides were synthesized in 90–98% yields by one-pot condensation of selenium dibromide, cyclo­octa-1,5-...

M. V. Musalov, S. A. Zhivet’eva, V. A. Potapov… in Russian Journal of Organic Chemistry (2021)

Article

Efficient Synthesis of 2-[(Alkyltellanyl)methyl]-2,3-dihydro-1-benzofurans from Tellurium Tetrahalides and 2-Allylphenols

Efficient methods have been proposed for the synthesis of 2-[(alkyltellanyl)methyl]-2,3-dihydro-1-benzofurans in up to 90% yield through generation of (2,3-dihydro-1-benzofuran-2-yl)methanetellurolate ions fro...

V. A. Potapov, A. G. Khabibulina, M. V. Musalova… in Russian Journal of Organic Chemistry (2021)

Article

Stereoselective synthesis of functionalized divinyl sulfides based on sulfur dichloride and (trimethylsilyl)acetylene

Sulfur dichloride reacts with (trimethylsilyl)acetylene to form stereoselectively E, E-bis-(2-chloro-2-trimethylsilylvinyl) sulfide and isomeric E-2-chloro-2-trimethylsilylvinyl E-2-chloro-1-trimethylsilylvinyl s...

M. V. Musalov, A. A. Maylyan, M. V. Musalova, S. V. Amosova… in Russian Chemical Bulletin (2021)

Article

Synthesis of Functional Dihydro-1,4-benzoxaselenines from Carvacrol Allyl Ether and Selenium Dihalides

One-step procedures have been developed for the selective synthesis of functionalized 2,3-dihydro-1,4-benzoxaselenines in 90–98% yields by cyclization of carvacrol allyl ether with selenium dihalides. Annulati...

M. V. Musalov, V. A. Yakimov, V. A. Potapov… in Russian Journal of Organic Chemistry (2020)

Article

Principles of Pulsar Space Navigation

The paper considers the principles of space navigation using pulsars observed in the radio range. The requirements for receiving equipment are outlined, a recommended pulsar list is given, and an algorithm for...

A. E. Rodin, V. V. Oreshko, V. A. Potapov, M. S. Pshirkov… in Astronomy Reports (2020)

Article

Immunotropic Properties of an Experimental Synthetic Selenium-Organic Compound

We studied immunotropic properties of synthetic selenium-organic preparation 2,6-dipyridinium-9-selenabicyclo[3.3.1]nonyl dibromide (974zh). The experimental preparation reduced the cAMP/cGMP ratio, which indi...

O. V. Yur’eva, V. I. Dubrovina… in Bulletin of Experimental Biology and Medic… (2020)

Article

Assembling of Thiazolo[3,2-a]pyridinium Salts via the Reaction of 2-Pyridinesulfenyl Halides with Vinyl Ethyl Ether

The regio- and stereoselective synthesis of 3-ethoxy-2H,3H-[1,3]thiazolo[3,2-a]pyridin-4-ium halides via the reaction of 2-pyridinesulfenyl halides with vinyl ethyl ether has been elaborated.

V. A. Potapov, R. S. Ishigeev, I. V. Shkurchenko… in Russian Journal of General Chemistry (2019)

Article

Effect of Synthetic Organoselenium Drug on the Degree of Pathological Changes in the Organs of White Mice Immunized with Tularemia and Brucellosis Vaccines

We studied the effect of the organoselenium compound 2,6-dipyridinium-9-selenium-bicyclo[ 3,3,1]nonan dibromide (974zh) on the severity of pathological changes in the organs of experimental animals immunized w...

O. V. Yurieva, V. I. Dubrovina… in Bulletin of Experimental Biology and Medic… (2019)

Article

Regio- and stereoselective reaction of sodium benzeneselenolate with 3-(trimethylsilyl)prop-2-ynamides

Sodium benzeneselenolate adds regio- and stereoselectively to 3-(trimethylsilyl)prop-2-yn-amides to give (Z)-3-(phenylselanyl)prop-2-enamides.

M. V. Andreev, V. A. Potapov, M. V. Musalov, L. I. Larina… in Russian Chemical Bulletin (2019)

Article

Synthesis of (1,3-oxathiolan-2-ylmethyl) sulfide and disulfide by cyclofunctionalization of 2-(vinylsulfanyl)ethanol with sulfur dichloride and monochloride

V. A. Potapov, E. O. Kurkutov, S. V. Amosova in Russian Chemical Bulletin (2019)

Article

Regio- and Stereoselective Addition of Selenium Dichloride to Alkyl Propiolates

The reaction of selenium dichloride with methyl and ethyl propiolates leads to formation of anti-Markovnikov adducts. The regio- and stereoselective synthesis of hitherto unknown bis[(E)-2-chloro-1-(alkoxycarbony...

M. V. Musalov, V. A. Yakimov, V. A. Potapov… in Russian Journal of Organic Chemistry (2019)

Article

Alkoxytelluration of Styrene with Tellurium Tetrahalides

An efficient synthesis of the earlier unknown trichloro- and tribromo(2-ahkoxy-2-phenylethyl)-λ⁴-tellanes with yields of 90 to 100% has been developed basing on alkoxytelluration of styrene with tellurium tetrach...

V. A. Potapov, A. G. Khabibulina, S. I. Udalova… in Russian Journal of General Chemistry (2019)

Article

Regio- and Stereoselective Synthesis of (E)-2-Bromo-1-(phenoxymethyl)vinyltellanes

Regio- and stereoselective synthesis of tribromo[(E)-2-bromo-1-(phenoxymethyl)vinyl]tellane based on the reaction of tellurium tetrabromide with propargyl phenyl ether has been elaborated. This reaction is the fi...

V. A. Potapov, A. G. Khabibulina, L. A. Ivanova… in Russian Journal of General Chemistry (2019)