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文章名     作者     期刊名     摘要     卷     期         如果没有找到您所需要的文献，请点击 ——此处申请     共19条记录   Donor-Acceptor-Substituted Oligo(1,4-phenylene)s [作者：Kim, S; Oehlhof, A; Beile, B; Meier, H,期刊：Helvetica Chimica Acta, 页码：1023-1033 , 文章类型： Article，,卷期：2009年92-6] Oligo(para-phenylene)s (DAOPPs) 2a-2d (n = 1-4) with terminal donor-acceptor substitution (D = C6H13O, A = NO2) were prepared by applying Suzuki cross-couplings for chain extension and end capping. The push - pull effect... Synthesis, Structural Diversity, and Ligand-Transfer Potential of (Carbene)copper(I) Complexes [作者：Venkatachalam, G; Heekenroth, M; Neels, A; Albrecht, M,期刊：Helvetica Chimica Acta, 页码：1034-1045 , 文章类型： Article，,卷期：2009年92-6] Copper(I) complexes comprising different N-heterocyclic carbene ligands were prepared via in situ deprotonation and metallation. Depending on the wingtip groups on the carbene ligand (alkyl vs. aryl, chelating or monoden... Alternative Solid-Phase Strategies for the Efficient Labelling of Peptides with (Bathophenanthroline)ruthenium(II) Complexes [作者：Kramer, RA; Bannwarth, W,期刊：Helvetica Chimica Acta, 页码：1046-1055 , 文章类型： Article，,卷期：2009年92-6] To increase the flexibility for the insertion of highly sensitive and robust [Ru-II(bathophenanthroline)] complexes into peptides, we have evaluated three different solid-phase strategies (bathophenanthroline = 4,7-diphe... 1,3-Dipolar Cycloadditions of a 2-Oxoethanenitrile Oxide Derived from (2R)-Bornane-10,2-sultam to Electronically Modified 4,4 '-Disubstituted Stilbenes [作者：Romanski, J; Chapuis, C; Jurczak, J,期刊：Helvetica Chimica Acta, 页码：1056-1069 , 文章类型： Article，,卷期：2009年92-6] Thanks to its type-II dipole nature, we were able to demonstrate the higher reactivity of the SO2/C=O syn-conformer for the uncatalyzed 1,3-dipolar cycloaddition of the 2-oxoethanenitrile oxide 2 derived from bornane-10,... Chemical Constituents from Clerodendrum bungei and Their Cytotoxic Activities [作者：Liu, SS; Zhou, T; Zhang, SW; Xuan, LJ,期刊：Helvetica Chimica Acta, 页码：1070-1079 , 文章类型： Article，,卷期：2009年92-6] A new phenylethanoid glycoside, two new cyclohexylethanoids, one new phenolic glycoside, and a new farnesane-type sesquiterpenoid, namely 2-phenylethyl 3-O-(6-deoxy-alpha-L-mannopyranosyl)-beta-D-glucopyranoside (1), 6 '... beta-Cyclodextrin-Promoted Addition of Benzeneselenol to Conjugated Alkenes in Water [作者：Srinivas, B; Kumar, VP; Sridhar, R; Reddy, VP; Nageswar, YVD; Rao, KR,期刊：Helvetica Chimica Acta, 页码：1080-1084 , 文章类型： Article，,卷期：2009年92-6] For the first time, a mild and efficient procedure was developed for the conjugate addition of alpha,beta-unsaturated compounds to benzeneselenol providing beta-(phenylseleno)-substituted compounds (Scheme). The reaction... New Cembranoids from the Hainan Soft Coral Sarcophyton glaucum [作者：Yao, LG; Liu, HL; Guo, YW; Mollo, E,期刊：Helvetica Chimica Acta, 页码：1085-1091 , 文章类型： Article，,卷期：2009年92-6] From the soft bodied coral Sarcophyton glaucum collected from the South China Sea two new cembranoids, (7R,8S)-dihydroxydeepoxy-ent-sarcophine (1) and secosarcophinolide (2), together with one known related compound, ent... Domino-Heck Reactions of Carba- and Oxabicyclic, Unsaturated Dicarboximides: Synthesis of Aryl-Substituted, Bridged Perhydroisoindole Derivatives [作者：Celik, C; Kulu, I; Ocal, N; Kaufmann, DE,期刊：Helvetica Chimica Acta, 页码：1092-1101 , 文章类型： Article，,卷期：2009年92-6] The C-C coupling of the two bicyclic, unsaturated dicarboximides 5 and 6 with aryl and heteroaryl halides gave, under reductive Heck conditions, the C-aryl-N-phenyl-substituted oxabicyclic imides 7a-c and 8a-c (Scheme3).... First Authentication of Kostanecki's Triketone and Multimolecular Reaction of Aromatic Aldehydes with Acetophenone [作者：Shan, ZX; Hu, XY; Hu, L; Peng, XT,期刊：Helvetica Chimica Acta, 页码：1102-1111 , 文章类型： Article，,卷期：2009年92-6] A double-component, multimolecular reaction between acetophenone and aromatic aldehydes was achieved under catalysis by the solid-base mixture NaOH/K2CO3, and Kostanecki's triketone, supposed to exist for more than 110 y... Proline-Containing Dipeptides from a Marine Sponge of a Callyspongia Species [作者：Yang, B; Dong, JD; Zhou, XF; Yang, XW; Lee, KJ; Wang, LS; Zhang, S; Liu, YH,期刊：Helvetica Chimica Acta, 页码：1112-1117 , 文章类型： Article，,卷期：2009年92-6] A detailed analysis of the chemical constituents of a marine sponge of Callyspongia sp. was performed. A new proline-containing dipeptide, callyspongidipeptide A (cyclo-((S)-Pro-8-hydroxy-(R)-Ile); 1) along with cyclo-((... Labdane and Tetranorlabdane Diterpenoids from Botryosphaeria sp MHF, an Endophytic fungus of Maytenus hookeri [作者：Yuan, L; Zhao, PJ; Ma, J; Lu, CH; Shen, YM,期刊：Helvetica Chimica Acta, 页码：1118-1125 , 文章类型： Article，,卷期：2009年92-6] Five new diterpenoids, named botryosphaerins A-E (1-5, resp.), including one labdane and four tetranorlabdane diterpenes, were isolated from the solid culture of the endophytic fungal strain Botryosphaeria sp. MHF of May... Alkaloids from Aconitum barbatum var. puberulum [作者：Sun, LM; Huang, HL; Li, WH; Nan, ZD; Zhao, GX; Yuan, CS,期刊：Helvetica Chimica Acta, 页码：1126-1133 , 文章类型： Article，,卷期：2009年92-6] Three new diterpenoid alkaloids, puberulines A-C (1-3, resp.), and three new benzamide derivatives, puberulines D-F (4-6, resp.). as well as 16 known diterpenoid alkaloids were isolated from Aconitum barbatum var. puberu... Oligonucleotide Analogues with Integrated Bases and Backbone Part 20 Hydrazide- and Amide-Linked Analogues. 1. Design and Synthesis of Monomeric Building Blocks [作者：Peifer, M; De Giacomo, F; Schandl, M; Vasella, A,期刊：Helvetica Chimica Acta, 页码：1134-1166 , 文章类型： Article，,卷期：2009年92-6] Hydrazide- and amide-linked oligonucleoside analogues with integrated bases and backbone were designed to allow for a rapid synthesis of long and water-soluble oligomers. The uracil-, cytosine-, and adenine-derived hydra... Oligonucleotide Analogues with Integrated Bases and Backbone Part 21 Influence of the Hydrogen-Bonding Motif on the Gelation of Self-Complementary A*[s]U-(*()) Dinucleosides [作者：Bogliotti, N; Vasella, A,期刊：Helvetica Chimica Acta, 页码：1167-1183 , 文章类型： Article，,卷期：2009年92-6] Gelation of organic solvents by the A*[s]U-(*()) dinucleosides 1 and 2 requires the formation of linear associates cross-linked by H-bonding involving either the nucleobase or HOCH2-C(6/I). This is evidenced by the absen... New Polyketides from Endophytic Diaporthe sp XZ-07 [作者：Yuan, L; Lin, X; Zhao, PJ; Ma, J; Huang, YJ; Shen, YM,期刊：Helvetica Chimica Acta, 页码：1184-1190 , 文章类型： Article，,卷期：2009年92-6] Four new polyketides, namely rel-(2R,3S,4R,5R)-4-ethyltetrahydro-3-methyl-5-propylfuran-2,3-diol (1), methyl 5-[(1R)-1-hydroxyethyl]-gamma-oxofuran-2-butanoate (2), butyl 5-[(1R)-1-hydroxyethyl]-gamma-oxofuran-2-butanoat... Three New Limonoids from Melia toosendan [作者：Zhou, CY; Tang, HY; Li, X; Sang, YS,期刊：Helvetica Chimica Acta, 页码：1191-1197 , 文章类型： Article，,卷期：2009年92-6] In order to find new and biologically active compounds, the constituents of the root bark of Melia toosendan were investigated, and three new limonoids, 29-[(2-methylbutanoyl)oxy]-2 alpha-hydroxyamoorastatone (1), 1,3-ep...