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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60条记录   Highly Sterically Hindered Olefins: A Case of E- and Z-Di-tert-butyl a,b-Unsaturated Acids. [作者：Ionkin, Alex S.;Marshall, William J.;Fish, Brian M.;,期刊：Organic Letters, 页码：2303-2305 , 文章类型： 研究论文，,卷期：2008年10-11] Use of a superbase in the Favorskii rearrangement of 3,5-dibromo-2,2,6,6-tetramethyl-4-heptanone resulted in the synthesis of highly sterically hindered olefins, (E)- and (Z)-2-tert-butyl-4,4-dimethyl-2-pentenoic acids. ... Stereodivergent Catalytic Doubly Diastereoselective Nitroaldol Reactions Using Heterobimetallic Complexes. [作者：Sohtome, Yoshihiro;Kato, Yuko;Handa, Shinya;Aoyama, Naohiro;Nagawa, Keita;Matsunaga, Shigeki;Shibasaki, Masakatsu;,期刊：Organic Letters, 页码：2231-2234 , 文章类型： 研究论文，,卷期：2008年10-11] Stereodivergent construction of three contiguous stereocenters in catalytic doubly diastereoselective nitroaldol reactions of a-chiral aldehydes, e.g. I (R1 = Me, PhCH2, EtO2CCH2CH2; R2 = Boc, Cbz), with nitroacetaldehyd... Mn-Mediated Coupling of Alkyl Iodides and Ketimines: A Radical Addition Route to a,a-Disubstituted a-Aminoesters. [作者：Friestad, Gregory K.;Ji, An;,期刊：Organic Letters, 页码：2311-2313 , 文章类型： 研究论文，,卷期：2008年10-11] Coupling of primary and secondary alkyl iodides with N-acylhydrazonoesters via Mn-mediated photolysis conditions affords access to tert-alkyl amines RMeC(NHBz)CO2Me (R = Et, iso-Pr, iso-Bu, n-C12H25, etc.). Assisted Ruthenium-Catalyzed C-H Bond Activation: Carboxylic Acids as Cocatalysts for Generally Applicable Direct Arylations in Apolar Solvents. [作者：Ackermann, Lutz;Vicente, Ruben;Althammer, Andreas;,期刊：Organic Letters, 页码：2299-2302 , 文章类型： 研究论文，,卷期：2008年10-11] Compounds (More Than One Hetero Atom)) Section Catalytic amts. of arom. carboxylic acid MesCO2H enabled efficient ruthenium-catalyzed direct arylations in apolar solvents with unparalleled broad scope via a concerted dep... Gold(III)-mediated aldol condensations provide efficient access to nitrogen heterocycles. [作者：Waldmann, Herbert;Karunakar, Galla V.;Kumar, Kamal;,期刊：Organic Letters, 页码：2159-2162 , 文章类型： 研究论文，,卷期：2008年10-11] Quinolines, dihydroquinolines, and aza-xanthones can be synthesized efficiently and under mild reaction conditions by means of a reaction sequence employing Au(III)-catalyzed aldol reactions as the key step. Inclusion and Gelation Properties of Novel Tetra- and Hexasalicylide Derivatives. [作者：Tanaka, Koichi;Hayashi, Satoshi;Caira, Mino R.;,期刊：Organic Letters, 页码：2119-2122 , 文章类型： 研究论文，,卷期：2008年10-11] tetrasalicylides having a 5-substituted halogen atom on the arom. ring form organogels with several kinds of org. solvents, whereas the parent compd. does not. In contrast, hexasalicylides form stable inclusion crystals... Nagelamides K and L, Dimeric Bromopyrrole Alkaloids from Sponge Agelas species. [作者：Araki, Atsushi;Kubota, Takaaki;Tsuda, Masashi;Mikami, Yuzuru;Fromont, Jane;Kobayashi, Jun'ichi;,期刊：Organic Letters, 页码：2099-2102 , 文章类型： 研究论文，,卷期：2008年10-11] Two new dimeric bromopyrrole alkaloids, nagelamides K (I) and L (II), have been isolated from Okinawan marine sponges Agelas species, and the structures and stereochem. were elucidated from spectroscopic data. Nagelamid... "Click" saccharide/b-lactam hybrids for lectin inhibition. [作者：Palomo, Claudio;Aizpurua, Jesus M.;Balentova, Eva;Azcune, Itxaso;Santos, J. Ignacio;Jimenez-Barbero, Jesus;Canada, Javier;Miranda, Jose Ignacio;,期刊：Organic Letters, 页码：2227-2230 , 文章类型： 研究论文，,卷期：2008年10-11] carbohydrate recognition domains in selectins have been prepd. according to a "shape-modulating linker" design. This approach was implemented using the azide-alkyne "click" cycloaddn. reaction, and as shown by NMR/MD ex... One-Way Biohydrogen Transfer for Oxidation of sec-Alcohols. [作者：Lavandera, Ivan;Kern, Alexander;Resch, Verena;Ferreira-Silva, Bianca;Glieder, Anton;Fabian, Walter M. F.;de Wildeman, Stefaan;Kroutil, Wolfgang;,期刊：Organic Letters, 页码：2155-2158 , 文章类型： 研究论文，,卷期：2008年10-11] Quasi-irreversible oxidn. of sec-alcs. was achieved via biocatalytic hydrogen transfer reactions using alc. dehydrogenases employing selected ketones as hydrogen acceptors, which can only be reduced but not oxidized. Th... Thiophene Donor-Acceptor [2]Rotaxanes. [作者：Ikeda, Taichi;Higuchi, Masayoshi;Sato, Akira;Kurth, Dirk G.;,期刊：Organic Letters, 页码：2215-2218 , 文章类型： 研究论文，,卷期：2008年10-11] A series of the thiophene donor-acceptor [2]rotaxanes have been synthesized based on the inclusion complexes of cyclobis(paraquat-p-phenylene) (CBPQT4+) with thiophene, bithiophene, and terthiophene. The max. wavelength... A Pentiptycene-Derived Light-Driven Molecular Brake. [作者：Yang, Jye-Shane;Huang, Yao-Ting;Ho, Jinn-Hsuan;Sun, Wei-Ting;Huang, Hsin-Hau;Lin, Ying-Chih;Huang, Shing-Jong;Huang, Shou-Ling;Lu, Hsiu-Feng;Chao, Ito;,期刊：Organic Letters, 页码：2279-2282 , 文章类型： 研究论文，,卷期：2008年10-11] A room-temp. light-driven mol. brake I consisting of a pentiptycene rotator, a 3,5-dinitrophenyl brake, and a photoisomerizable ethenyl spacer, is reported. The rotation rates of the rotator differ by about 9 orders of ... 1,2-H Shift in Copper-Chlorocarbenoid Intermediate during CuCl/bpy-Promoted Stereoselective Dechlorination of 2,2,2-Trichloroethyl Alkyl Ethers to (Z)-1-Alkoxy-2-chloroethenes. [作者：Ram, Ram N.;Manoj, T. P.;,期刊：Organic Letters, 页码：2243-2246 , 文章类型： 研究论文，,卷期：2008年10-11] CuCl/bpy in refluxing DCE yielded (Z)-1-alkoxy-2-chloroethenes stereoselectively as the major product via 1,2-H shift in copper-chlorocarbenoid intermediate. 2,2,2-Trichloroethyl carboxylates undergo a radical 1,2-acylo...