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Article
Synthesis of [3-(trimethylsilyl)prop-2-yn-1-yl] selenides
Efficient and selective methods have been developed for the synthesis of previously unknown organyl [3-(trimethylsilyl)prop-2-yn-1-yl] selenides, organyl prop-2-yn-1-yl selenides, and bis[3-(trimethylsilyl) pr...
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Article
Diagnostics of small-scale details on asteroid’s surface from the fast spectrophotometry data
To study the mineralogical composition of an asteroid’s surface with a technique of colorimetry of small-scale details, we propose fast spectrophotometry with a low-resolution imaging spectrograph and a time r...
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Article
High-frequency variations of spectral lines in cromospherically active stars 61 cyg AB
We report on the detection of rapid variability in subsecond mode in the Balmer lines of hydrogen, lines Ca II H,K, and b Mg I triplet in chromospherically active stars 61 Cyg A, B. The spectral observations o...
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Article
Photometric studies of comet C/2009 P1 (Garradd) before the perihelion
The results of the photometric observations of comet C/2009 P1 (Garradd) performed at the 60-cm Zeiss-600 telescope of the Terskol observatory have been analyzed. During the observations, the comet was at the ...
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Article
Efficient tandem synthesis of 3-alkylaminoprop-2-enamides from 3-trimethylsilylprop-2-ynamides
A tandem synthetic approach to previously unknown 3-aminoprop-2-enamides has been developed. It is based on Si-C sp desilylation of 3-trimethylsilylprop-2-ynamides and subsequen...
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Article
P/2010 TO20 LINEAR-Grauer: A comet in transition from Centaurs to the Jupiter family
The object P/2010 TO20 LINEAR-Grauer, discovered at a heliocentric distance of over 5 AU, and at first classified as a Trojan, is now believed to be a comet. This paper reports special observations of the obje...
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Article
Slitless spectrograph for small telescopes: First results
A slitless UBVR spectrograph has been built for use on small telescopes. Test observations on the Zeiss-600 telescope at the Terskol peak demonstrated that the spectrograph is an efficient instrument for studying...
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Article
Fast spectrophotometry of the flare star EV lacertae
We present the results of fast spectrophotometry for two flares on EV Lac with a time resolution of 8 s and a spectroscopic resolution R ∼ 100. The observations were performed in May and August 2010 with a slitle...
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Article
Photometry of the dwarf nova V503 Cyg in 2010. Orbital and other periods
Photometric studies of the dwarf nova V503 Cygni have been conducted for 29 nights at the Crimean Astrophysical Observatory and at the Terskol Observatory during 2010. We detected none of the socalled “negativ...
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Article
Narrow-band tunable laser system for a lidar facility
A unique ultraviolet laser system has been developed for a lidar intended to detect nitrogen oxide molecules in the atmosphere. The electric-discharge KrF laser system is capable of producing a highly coherent...
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Article
Interaction of 3,5-dimethylpyrazole with cobalt(II) carboxylates containing coordinated 1,10-phenanthroline or 2,2′-dipyridyl
The reaction of Co3(μ-OOCBu t )6(NEt3)2 with 1,10-phenanthroline or 2,2′-dipyridyl in benzene at room temperature yields L2Co2(μ-OH2)(μ-OOCBu t
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Article
The rotation period of comet 29P/Schwassmann-Wachmann 1 determined from the dust structures (Jets) in the coma
The results of the photometric observations of comet 29P/Schwassmann-Wachmann 1 are analyzed. The comet demonstrates substantial activity at heliocentric distances larger than 5 AU, i.e., outside the water ice...
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Article
Highly efficient desilylation of 3-trimethylsilylprop-2-ynamides by the action of KF-Al2O3
A highly effective procedure has been developed for desilylation of 3-trimethylsilylprop-2-ynamides in the presence of KF-Al2O3 as catalyst. The corresponding terminal prop-2-ynamides were obtained in high yield ...
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Article
Chemoselective reactions of trimethylsilylpropynal with aminopyrimidines and amino acid esters
Highly efficient chemoselective 1,2-addition of 2-aminopyrimidines and D,L-amino acid esters to substituted propynals was performed. Acid-catalyzed addition of 2-aminopyrimidine and 2-amino-4-methylpyrimidine ...
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Article
Pulsations of optical radiation during the flare of YZ CMi occurred on February 9, 2008
One of the most powerful and long-lived flares on the active red dwarf YZ CMi is considered. The flare was observed in the U band at the Terskol Peak Observatory on February 9, 2008. During the formation of th...
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Article
Astrometric results of observations at Russian observatories of mutual occultations and eclipses of Jupiter’s Galilean satellites in 2009
In 2009, in five Russian observatories photometric observations of Jupiter’s Galilean satellites during their mutual occultations and eclipses were carried out. Based on these observations, an original method ...
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Article
A photometric study of the polar MT draconis in 2005–2009
We have obtained data on various brightness states of the polar MT Dra over five years of observations, including the first multicolor photometry for this close binary. We confirm the known orbital period, whi...
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Article
One-Pot Synthesis of 3-(Trimethylsilyl)propynamides
A highly efficient one-pot procedure was developed for the synthesis of 3-trimethylsilylpropynamides by acylation of amines with trimethylsilylpropynoyl chloride generated in situ. Selective N-acylation and N,O-b...
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Article
Experimental search for gamma-ray bursts from evaporating primordial black holes
The energy spectra and temporal characteristics of high-energy gamma-ray bursts from evaporating primordial black holes have been calculated using various evaporation models. The currently existing theoretical...
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Article
The dwarf nova MN Dra: Periodic processes at various phases of the supercycle
We analyze photometry of the dwarf nova MN Dra carried out using various instruments at four observatories on 18 nights between May 20 and June 28, 2009. The observations cover a variety of activity states of ...
