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作者:Kucerová-Chlupácová, Marta , Opletalová, Veronika , Jampílek, Josef ...
来源:[J].Collection of Czechoslovak Chemical Communications(IF 1), 2008, Vol.73 (1), pp.1-I
摘要:Pyrazine derivatives show a wide range of biological activities. 1-Pyrazin-2-ylethan-1-ones have served as food flavourants, and together with pyrazine-2-carbonitriles have been widely used as intermediates in the synthesis of various heterocyclic compounds. In our laborator...
作者:Hrebabecký, Hubert , Dracínský, Martin , Holý, Antonín
来源:[J].Collection of Czechoslovak Chemical Communications(IF 1), 2008, Vol.73 (1), pp.44-II
摘要:Starting ethyl (1R*,2R*,3R*,4S*)-3-bromobicyclo[2.2.1]hept-5-ene-2-carboxylate (9) was reduced with LiAlH^sub 4^ and benzoylated giving [(1R*,2R*,3R*,4S*)-3-bromobicyclo[2.2.1]hept-5-en-2-yl]methyl benzoate (11). Treatment of 11 with NaN^sub 3^ and CrO^sub 3^ in acetic acid affor...
作者:Wu, Dayu , Wu, Genhua , Huang, Wei ...
来源:[J].Collection of Czechoslovak Chemical Communications(IF 1), 2008, Vol.73 (1), pp.24-I
摘要:The compound [Cd(4,4'-bpy)^sub 2^(H2O)^sub 2^](ClO^sub 4^)^sub 2^.(L)^sub 2^ was obtained by the reaction of Cd(ClO^sub 4^)^sub 2^, bis(1-pyrazinylethylidene)hydrazine (L) and 4,4'-bipyridine in aqueous MeOH. Single-crystal X-ray diffraction has revealed its two-dimensional ...
作者:Paces, Ondrej , Tocík, Zdenek , Rosenberg, Ivan
来源:[J].Collection of Czechoslovak Chemical Communications(IF 1), 2008, Vol.73 (1), pp.32-I
摘要:Synthesis of a novel cyanoethyl-type linker suitable for the solid-phase synthesis of oligodeoxynucleotides possessing terminal 3'-phosphate group is described. Since the linker is a 2-substituted 2-cyanoethanol, the release of the synthesized oligonucleotide from the solid ...
作者:Hlavatý, Jaromír , Polásek, Miroslav
来源:[J].Collection of Czechoslovak Chemical Communications(IF 1), 2008, Vol.73 (1), pp.19-I
摘要:Tetramethyl acetals of alkynedials were prepared by anodic oxidation of corresponding alkyne-1,ω-diols (C^sub 4^ and C^sub 6^) in trimethyl orthoformate on glassy carbone anode in 80% yield. 1,1,4,4-Tetramethoxybut-2-yne (2a) can be prepared by this one-step procedure from b...
作者:Soralová, Stanislava , Breza, Martin
来源:[J].Collection of Czechoslovak Chemical Communications(IF 1), 2008, Vol.73 (1), pp.59-II
摘要:Optimal geometries and corresponding electronic structures of various [Pb(OH)^sub 3^]^sup -^ and [Pb(OH)^sub 4^]^sup 2-^ conformational isomers are investigated by the B3LYP and MP2 treatments. Unlike highly symmetric [Pb(OH)^sub 3^]^sup -^ structure (C^sub 3^ symmetry), the most...
作者:Ignjatovic, Ljubisa M , Barek, Jirí , Zima, Jirí ...
来源:[J].Collection of Czechoslovak Chemical Communications(IF 1), 2008, Vol.73 (1), pp.97-III
摘要:The optimum conditions were found for the determination of 1,1-dimethyl-3-phenyltriazene in the concentration range from 1 × 10^sup -4^ to 1 × 10^sup -7^ mol l^sup -1^ by differential pulse voltammetry at a hanging mercury drop electrode. The sensitivity of the determination...
作者:Zhang, Wei , Xie, Shaoai , Chen, Hongjin ...
来源:[J].Collection of Czechoslovak Chemical Communications(IF 1), 2008, Vol.73 (1), pp.73-II
摘要:Boron-doped diamond (BDD) electrodes, both as-prepared and electrochemically oxidized were studied. The relation between the anodic oxidation treatment time, anodic potential and electrochemical characteristics has been discussed. Electron transfer processes in all BDD elect...

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