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Atom-economic Approach to the Synthesis of α-(Hetero)aryl-substituted Furan Derivatives from Biomass
Leonid V. Romashov Kirill S. Kozlov Matvey K. Skorobogatko Alexander Y. Kostyukovich Valentine P. Ananikov 《化学:亚洲杂志》2022,17(1):e202101227
An atom-economic ring construction approach to the synthesis of α-(hetero)arylfurans based on renewable furanic platform chemicals has been developed. Corresponding compounds have been prepared in good to excellent yields via [2+2+2] and [4+2] cycloaddition reactions using metal-catalyzed or photoredox protocols. Easily available HMF-based 2-hydroxymethyl-5-ethynylfuran and 2-hydroxymethyl-5-cyanofuran were used as starting materials. A synthetic route with an improved carbon economy factor has been implemented to achieve sustainability aim. The possible application of arylfurans as molecular conductors has been investigated by DFT calculations, which revealed excellent charge transfer properties. As a future perspective, integration of biomass processing strategy into manufacturing of molecular electronics was pointed out to achieve the aim of sustainability. 相似文献
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Maryasov M. A. Romashov N. P. Davydova V. V. Nasakin O. E. Osipova M. P. 《Russian Journal of General Chemistry》2021,91(5):947-950
Russian Journal of General Chemistry - A series of new methyl 4-aryl-6-oxo-5-cyano-1,6-dihydropyridine-2-carboxylates and 4-aryl-6-oxo-5-cyano-1,6-dihydropyridine-2-carboxylic acids were... 相似文献
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We obtain an analytical solution of the problem on the motion of a body with wedge-shaped nose in an elastic medium for the
case in which a medium separation zone may occur near the nose owing to asymmetry. The character of the dependence of the
separation region length on the body velocity, the nose opening angle, the motion asymmetry degree, and the friction coefficient
is found. It is shown that if the body moves at a velocity greater than the transverse wave velocity, then there is a limit
velocity at which the separation region near the nose of the body disappears. 相似文献
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Interaction between two opposed jets 总被引:3,自引:0,他引:3
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Krekov G. M. Krekova M. M. Romashov D. N. Shamanaev V. S. 《Russian Physics Journal》2001,44(11):1197-1208
A numerical experiment is performed to obtain the polarization characteristics of signals of a monostatic lidar intended for homogeneous cloud sensing. It is assumed that clouds consist of monodisperse randomly-oriented hexagonal ice crystals. To solve the vector radiative transfer equation, the light scattering phase matrices, preliminary calculated with the help of the beam splitting technique, are used as input data. The formation of the polarization structure of multiply scattered background signal component is studied for different scattering orders depending on crystal shapes and sizes and optical and geometrical conditions of the experiment. 相似文献
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T. V. Voloshina T. N. Zavaritskaya I. V. Kavetskaya V. A. Karavanskii D. A. Romashov 《Journal of Applied Spectroscopy》2002,69(2):275-278
Samples of porous silicon have been produced and investigated for the first time by the method of anodizing in a modified iodinecontaining electrolyte. It is shown that the addition of iodine to the electrolyte, all other things being constant, substantially influences the formation of porous silicon and leads to the occurrence of photoluminescence in poroussilicon layers on highly doped substrates of silicon of the n
+type. The morphology of the surface of the produced poroussilicon samples has been investigated and a marked decrease in the inhomogeneity scale as compared to the nonluminescent porous silicon produced without iodine under the same conditions has been detected. Investigation of the dependence of the spectral properties of photoluminescence on the density of the anodizing current has shown that with increase in the current density the maximum of the photoluminescence spectrum shifts to the shortwave region and the halfwidth of the photoluminescence spectrum decreases. 相似文献
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