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81.
P. Marchenko Anatoliy K. Koydan Georgiy S. Huryeva Anastasia V. Smaliy Radomyr A. Yurchenko Aleksandr N. Alekseenko Anatoliy 《Heteroatom Chemistry》2010,21(7):453-455
It has been found that N‐(4‐imidazolyl)phosphinimidic isocyanates obtained by the reaction of the corresponding chlorophosphine N‐hetarylimide with alkali metal cyanates can undergo intramolecular heterocyclization to yield previously unknown phosphapurine derivatives containing an endocyclic PN double bond. This radically novel approach to building the 2‐phosphapurine system shows promise for the synthesis of related phosphorus‐containing fused heterocycles. © 2010 Wiley Periodicals, Inc. Heteroatom Chem 21:453–455, 2010; View this article online at wileyonlinelibrary.com . DOI 10.1002/hc.20617 相似文献
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Vanessa A. dos Santos Lidia S. Shul''pina Dario Veghini Dalmo Mandelli Georgiy B. Shul''pin 《Reaction Kinetics and Catalysis Letters》2006,88(2):339-348
Summary The dinuclear manganese(IV) complex [LMn(O)3MnL](PF6)2 (1, L = 1,4,7-trimethyl-1,4,7-triazacyclononane) catalyzes the extremely efficient oxidation of alcohols with hydrogen peroxide
at room temperature. Oxalic acid is an obligatory co-catalyst. The oxidation of isopropanol, for example, yields acetone with
turnover numbers up to 40000 after 5-10 h in the absence of a solvent. 2-Cyanoethanol was oxidized by this system with somewhat
lower efficiency (conversion 70%). The catalytically active cation from salt 1 was obtained in an insoluble form containing
a heteropoly anion [Mn2O3(TMTACN)2]2[SiW12O40]. Oxidation of 2-cyanoethanol using this heterogenized catalyst and oxalic acid gave the oxo-products with the 54% total
yield. 相似文献
84.
Dr. Alexey N. Bilyachenko Dr. Mikhail M. Levitsky Alexey I. Yalymov Prof. Alexander A. Korlyukov Prof. Viktor N. Khrustalev Dr. Anna V. Vologzhanina Lidia S. Shul'pina Dr. Nikolay S. Ikonnikov Dr. Alexander E. Trigub Pavel V. Dorovatovskii Dr. Xavier Bantreil Dr. Frédéric Lamaty Dr. Jérôme Long Prof. Joulia Larionova Dr. Igor E. Golub Prof. Elena S. Shubina Prof. Georgiy B. Shul'pin 《Angewandte Chemie (International ed. in English)》2016,55(49):15360-15363
A series of four unprecedented heterometallic metallagermsesquioxanes were synthesized. Their cage‐like architectures have a unique type of molecular topology consisting of the hexairon oxo {Fe6O19} core surrounded in a triangular manner by three cyclic germoxanolates [PhGe(O)O]5. This structural organization induces antiferromagnetic interactions between the FeIII ions through the oxygen atoms. Evaluated for this first time in catalysis, these compounds showed a high catalytic activity in the oxidation of alkanes and the oxidative formation of benzamides from alcohols. 相似文献
85.
Frontispiece: Cage‐like Copper(II) Silsesquioxanes: Transmetalation Reactions and Structural,Quantum Chemical,and Catalytic Studies
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Dr. Alexey N. Bilyachenko Dr. Marina S. Dronova Alexey I. Yalymov Dr. Frédéric Lamaty Dr. Xavier Bantreil Prof. Jean Martinez Christelle Bizet Lidia S. Shul'pina Prof. Alexander A. Korlyukov Dmitry E. Arkhipov Dr. Mikhail M. Levitsky Prof. Elena S. Shubina Dr. Alexander M. Kirillov Prof. Georgiy B. Shul'pin 《Chemistry (Weinheim an der Bergstrasse, Germany)》2015,21(24)
86.
Trifluoromethylchlorosulfonylation of Alkenes: Evidence for an Inner‐Sphere Mechanism by a Copper Phenanthroline Photoredox Catalyst
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Dattatraya B. Bagal Dr. Georgiy Kachkovskyi Matthias Knorn Thomas Rawner Prof. Dr. Bhalchandra M. Bhanage Prof. Dr. Oliver Reiser 《Angewandte Chemie (International ed. in English)》2015,54(24):6999-7002
A visible‐light‐mediated procedure for the unprecedented trifluoromethylchlorosulfonylation of unactivated alkenes is presented. It uses [Cu(dap)2]Cl as catalyst, and contrasts with [Ru(bpy)3]Cl2, [Ir(ppy)2(dtbbpy)]PF6, or eosin Y that exclusively give rise to trifluoromethylchlorination of the same alkenes. It is assumed that [Cu(dap)2]Cl plays a dual role, that is, acting both as an electron transfer reagent as well as coordinating the reactants in the bond forming processes. 相似文献
87.
Vladimir Azhazha Sergey Dub Georgiy Khadzhay Boris Merisov Sergey Malykhin Anatoliy Pugachov 《哲学杂志》2013,93(10):983-990
Ti–Zr–Ni samples with a substantial predominance of icosahedral quasicrystalline phase were produced by the melt-spinning technique. Their structure and mechanical properties were studied by X-ray diffraction and nanoindentation methods. The quasicrystalline phase was found to have a primitive lattice with the quasicrystallinity parameter a q = 0.5200–0.5210?nm. Quasicrystalline deformation behaviour under nanoindentation versus phase composition and structure is discussed in comparison with single crystal W–12?wt%?Ta. The estimated elastic modulus E of the quasicrystalline phase shows no correlation with the element composition. The nanohardness was shown to increase with increasing quasicrystalline-phase perfection. Load–displacement curves of Ti–Zr–Ni quasicrystals (QCs) show stepwise character with alternation of elastic and plastic sections. Such non-uniform plastic flow in QCs might be caused by the localization of plastic deformation in shear bands. The non-uniformity of the plastic deformation increases with the increasing quasicrystalline phase perfection. 相似文献
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89.
Georgiy B. Shul'pin Yuriy N. Kozlov Lidia S. Shul'pina Pavel V. Petrovskiy 《应用有机金属化学》2010,24(6):464-472
Trinuclear carbonyl hydride cluster, Os3(CO)10(µ‐H)2, catalyzes oxidation of cyclooctane to cyclooctyl hydroperoxide by hydrogen peroxide in acetonitrile solution. The hydroperoxide partly decomposes in the course of the reaction to afford cyclooctanone and cyclooctanol. Selectivity parameters obtained in oxidations of various linear and branched alkanes as well as kinetic features of the reaction indicated that the alkane oxidation occurs with the participation of hydroxyl radicals. A similar mechanism operates in transformation of benzene into phenol and styrene into benzaldehyde. The system also oxidizes 1‐phenylethanol to acetophenone. The kinetic study led to a conclusion that oxidation of alcohols does not involve hydroxyl radicals as main oxidizing species and apparently proceeds with the participation of osmyl species, ‘Os?O’. Copyright © 2010 John Wiley & Sons, Ltd. 相似文献
90.
Titanosilicalite TS-1 catalyses oxidation of light (methane, ethane, propane and n-butane) and normal higher (hexane, heptane, octane and nonane) alkanes to give the corresponding isomeric alcohols and ketones. The oxidation of higher alkanes proceeds in many cases with a unique regioselectivity. Thus, in the reaction with n-heptane the CH2 groups in position 3 exhibited a reactivity 2.5 times higher than those of the other methylene groups. This selectivity can be enhanced if hexan-3-ol is added to the reaction mixture, the 3-CH2/2-CH2 ratio becoming 10. It is assumed that the unusual selectivity in the oxidation of n-heptane (and other higher alkanes) is due to steric hindrance in the catalyst cavity. As a result, the catalytically active species situated on the catalyst walls can only easily react with certain methylenes of the alkane, which is adsorbed in the cavity taking U-shape (hairpin) conformations. 相似文献