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Jörg Stierstorfer Dr. Karina R. Tarantik Dipl.‐Chem. Thomas M. Klapötke Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(23):5775-5792
A new way to make a bang : Several functionalized 1‐ethyl‐5‐aminotetrazoles, 1‐ethyl‐5‐nitrimino‐tetrazoles, and copper complexes have been synthesized and their chemical and energetic properties have been comprehensively characterized. The compounds belong to all classes of “energetic materials”: explosives, propellants, and pyrotechnics.
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Ru bo Zhang Dr. Leif A. Eriksson Prof. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(10):2394-2402
Cutting ties : Strand scission and base release in hydroxy‐radical adducts of 3′‐uridine monophosphate (UMP) have been explored by using density functional theory. The presence of the ribose 2′‐OH group and the resultant formation of low‐barrier hydrogen bonds with oxygen atoms of the 3′‐phosphate linkage are highly important for hydrogen transfer and the subsequent bond‐breakage reactions (see picture).
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Maryline Chemama Matthieu Fonvielle Dr. Michel Arthur Dr. Jean‐Marc Valéry Prof. Mélanie Etheve‐Quelquejeu Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(8):1929-1938
Stable analogues : An effective synthetic route involving cycloaddition between alkynes and azidonucleosides to afford a new class of stable aminoacyl‐tRNA analogues such as depicted is presented. Biological evaluation showed that theses new compounds act as potent inhibitors of FemXWv aminoacyl transferase, a novel drug target.
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Andreas Sonnauer Frank Hoffmann Dr. Michael Fröba Prof. Dr. Lorenz Kienle Prof. Dr. Viola Duppel Matthias Thommes Dr. Christian Serre Gérard Férey Prof. Dr. Norbert Stock Prof. Dr. 《Angewandte Chemie (International ed. in English)》2009,48(21):3791-3794
Large, larger, …? Replacement of 1,4‐benzenedicarboxylate by 2,6‐naphthalenedicarboxylate in the MIL‐101 structure leads to an isoreticular mesoporous framework containing cages with diameters of 39 and 46 Å. High‐throughput methods are employed to determine appropriate reaction conditions. The microcrystalline compound is characterized by molecular simulation techniques, powder X‐ray diffraction, N2‐sorption, and TEM investigations.
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Alexis Coste Ganesan Karthikeyan Dr. François Couty Prof. Gwilherm Evano Dr. 《Angewandte Chemie (International ed. in English)》2009,48(24):4381-4385
Mild reaction conditions are the advantage of the title reaction, which allows straightforward entry to a variety of ynamides starting from readily available 1,1‐dibromo‐1‐alkenes, which act as attractive alkynylating agents (see scheme; EWG=electron‐withdrawing group, DMF=N,N‐dimethylformamide).
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Osama Shekhah Dr. Hui Wang Denise Zacher Roland A. Fischer Prof. Christof Wöll Prof. 《Angewandte Chemie (International ed. in English)》2009,48(27):5038-5041
One step at a time : The in situ monitoring of the step‐by‐step formation of metal–organic frameworks (MOFs) by using surface plasmon resonance (SPR), allows the nucleation process and the formation of the secondary building units to be investigated. Growth rates on functionalized organic surfaces with different crystallographic orientations can also be studied.
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Anne Brennführer Helfried Neumann Dr. Matthias Beller Prof. Dr. 《Angewandte Chemie (International ed. in English)》2009,48(23):4114-4133
A CO group richer : (Hetero)arenes are vital intermediates in the manufacture of agrochemicals, dyes, pharmaceuticals, and other industrial products. In the past decades transition‐metal‐catalyzed coupling reactions of aryl halides with all types of nucleophiles have been developed. This Review summarizes recent work in the area of palladium‐catalyzed carbonylation reactions of aryl halides and related compounds (see scheme).
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Bhasker Bantu Gajanan Manohar Pawar Ulrich Decker Dr. Klaus Wurst Dr. Axel M. Schmidt Dr. Michael R. Buchmeiser Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(13):3103-3109
Catalytic rivals : Both CO2‐protected tetrahydropyrimidin‐2‐ylidene‐based N‐heterocyclic carbenes (NHCs) and SnII‐1,3‐dimesitylimidazol‐2‐ylidene, as well as SnII‐1,3‐dimesitylimidazolin‐2‐ylidene complexes (example displayed), have been identified as truly latent catalysts for polyurethane (PUR) synthesis rivaling all existing systems both in activity and latency.
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Qiufeng Huang Dr. Ruimao Hua Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(15):3817-3822
Economical atoms : 2‐Cyclopenten‐1‐ones, 5‐alkylidenefuran‐2(5 H)‐ones and indan‐1‐ones have been synthesized by atom‐economic reductive cyclocarbonylation of internal alkynes with carbon monoxide catalyzed by [{RhCl(CO)2}2]/CO(NH2)2 in the presence of water (see scheme).
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Keunho Kim Jin Kun Cha Prof. Dr. 《Angewandte Chemie (International ed. in English)》2009,48(29):5334-5336
A stereoselective synthesis of cyathin A3 and cyathin B2 has been achieved by a Prins‐type reaction of a cycloalkenyl cyclopropanol. Particularly noteworthy is the use of a spirocyclobutanone moiety as a convenient scaffold for an efficient ring‐closing metathesis to stereoselectively construct a suitably functionalized seven‐membered ring (see scheme).
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Yoshihiro Matano Prof. Dr. Makoto Nakashima Hiroshi Imahori Prof. Dr. 《Angewandte Chemie (International ed. in English)》2009,48(22):4002-4005
Mind the (narrow) gap : α‐Ethynylphospholes generated in situ from the corresponding silyl‐capped precursors were converted into a series of α‐(arylethynyl) phospholes bearing functional substituents as well as an α,α′‐linked terphosphole (see scheme). The terphosphole has a narrow HOMO–LUMO gap owing to efficient π conjugation over the three phosphole rings.
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Richard B. C. Jagt Dr. Rodolfo F. Gómez‐Biagi Mark Nitz Prof. 《Angewandte Chemie (International ed. in English)》2009,48(11):1995-1997
Tracking down potential killers : Strong host–guest interactions enable the facile combination of polycationic cyclodextrin binding motifs (blue) with fluorescent reporters (orange) tethered to a hydrophobic guest molecule (dark green). An array of supramolecular fluorescent receptors prepared by this modular approach was used for the pattern‐based recognition of negatively charged contaminants in the anticoagulant drug heparin.
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Kirill Nikitin Dr. Helge Müller‐Bunz Dr. Yannick Ortin Dr. Michael J. McGlinchey Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(8):1836-1843
Metal clamping in operation! Deprotonation of [η6‐2‐(9‐triptycyl)indene]tricarbonylchromium induces a haptotropic shift of the organometallic fragment from the six‐membered to the five‐membered ring, as in a→b . In the anion, rotation of the molecular paddlewheel is blocked by the bulky tripod. X‐ray crystal structures provide pictures of the system in both its “ON” and “OFF” states.
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Sergey N. Semenov Olivier Blacque Dr. Thomas Fox Dr. Koushik Venkatesan Dr. Heinz Berke Prof. Dr. 《Angewandte Chemie (International ed. in English)》2009,48(28):5203-5206
Tungsten tryst : A 4‐H‐butatrienylidene complex of tungsten was successfully isolated and structurally characterized. It undergoes a unique self‐coupling, which leads to a dimer (see picture; P pink, O red) with a cross‐conjugated π system and with electrochemically and magnetically active metal centers.
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