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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77条记录   Synthesis of the Macrocyclic Core of (-)-Pladienolide B. [作者：Skaanderup, Philip R.;Jensen, Thomas;,期刊：Organic Letters, 页码：2821-2824 , 文章类型： 研究论文，,卷期：2008年10-13] An efficient synthesis of the macrocyclic core (I) of (-)-pladienolide B is disclosed. The concise route relies on a chiral auxiliary-mediated asym. aldol addn. and an osmium-catalyzed asym. dihydroxylation to install t... Successive Copper(I)-Catalyzed Cross-Couplings in One Pot: A Novel and Efficient Starting Point for Synthesis of Carbapenems. [作者：Jiang, Biao;Tian, Hua;Huang, Zuo-Gang;Xu, Min;,期刊：Organic Letters, 页码：2737-2740 , 文章类型： 研究论文，,卷期：2008年10-13] An efficient approach for synthesizing a series of 2-sulfide carbapenems has been developed using two successive Cu(I)-catalyzed cross-couplings in a single pot. The method involves highly selective intramol. coupling o... Mild, Efficient Friedel-Crafts Acylations from Carboxylic Acids Using Cyanuric Chloride and AlCl3. [作者：Kangani, Cyrous O.;Day, Billy W.;,期刊：Organic Letters, 页码：2645-2648 , 文章类型： 研究论文，,卷期：2008年10-13] A mild method for Friedel-Crafts acylation with arom. and aliph. carboxylic acids using cyanuric chloride, pyridine, and AlCl3 was developed. Both inter- and intramol. acylations were achieved at room temp. in high yiel... A New Five-Membered Ring Forming Process Based on Palladium(0)-Catalyzed Arylative Cyclization of Allenyl Enones. [作者：Tsukamoto, Hirokazu;Kondo, Yoshinori;,期刊：Organic Letters, 页码：2633-2636 , 文章类型： 研究论文，,卷期：2008年10-13] cyclization reaction of C1-, C2-, and C3-tethered allenyl enones with arylboronic acids to produce five-membered ring contg. products. The regioselectivity of the process, assocd. with aryl group introduction into the a... Catalytic Michael Reactions of Keto esters with a Camphor-Derived Acrylate Equivalent: Stereoselective Access to All-Carbon Quaternary Centers. [作者：Palomo, Claudio;Oiarbide, Mikel;Garcia, Jesus M.;Banuelos, Patricia;Odriozola, Jose M.;Razkin, Jesus;Linden, Anthony;,期刊：Organic Letters, 页码：2637-2640 , 文章类型： 研究论文，,卷期：2008年10-13] A camphor-based a'-hydroxy enone reagent acts as a chiral acrylate equiv. in copper-catalyzed Michael reactions of b-keto esters and affords products, e.g. the (trimethylbicycloheptanyl)oxopentanoate I, that possess all-... Assigning the Configuration of Amino Alcohols by NMR: A Single Derivatization Method. [作者：Leiro, Victoria;Seco, Jose Manuel;Quinoa, Emilio;Riguera, Ricardo;,期刊：Organic Letters, 页码：2733-2736 , 文章类型： 研究论文，,卷期：2008年10-13] The chirality of sec/prim- and prim/sec-1,2-amino alcs. can be detd. by 1H NMR of just one MPA deriv. -either (R) or (S)- by comparison of two spectra at different temps. and anal. of the evolution of the easily observab... Copper(I)-Catalyzed Carboxylation of Aryl- and Alkenylboronic Esters. [作者：Takaya, Jun;Tadami, Satoshi;Ukai, Kazutoshi;Iwasawa, Nobuharu;,期刊：Organic Letters, 页码：2697-2700 , 文章类型： 研究论文，,卷期：2008年10-13] alkenylboronic esters proceeded smoothly under CO2 to give the corresponding carboxylic acids in good yield. This reaction showed wide generality with higher functional group tolerance compared to the corresponding Rh(I... Water-Soluble Tripeptide Ab (9-11) Forms Amyloid-Like Fibrils and Exhibits Neurotoxicity. [作者：Naskar, Jishu;Drew, Michael G. B.;Deb, Ishani;Das, Sumantra;Banerjee, Arindam;,期刊：Organic Letters, 页码：2625-2628 , 文章类型： 研究论文，,卷期：2008年10-13] A water-sol., hydrophilic tripeptide GYE, having sequence identity with the N-terminal segment of amyloid peptides Ab(9-11), upon self-assocn. exhibits amyloid-like fibrils and significant neurotoxicity towards the Neuro... 2',3'-dideoxy-3'-thionucleoside triphosphates: Syntheses and polymerase substrate activities. [Erratum to document cited in CA146:522007]. [作者：Meena;Sam, Mui;Pierce, Kathryn;Szostak, Jack W.;McLaughlin, Larry W.;,期刊：Organic Letters, 页码：2917-2917 , 文章类型： 研究论文，,卷期：2008年10-13] Further studies with MALDI-TOF MS show that our conclusion on page 1161 that DNA polymerases can catalyze the attack of a thiol nucleophile on a phosphate electrophile to generate a phosphorothiolate linkage is incorrect... Base-Mediated Cyclization Reaction of 2-Alkynylphenylphosphine Oxides: Synthesis and Photophysical Properties of Benzo[b]phosphole Oxides. [作者：Sanji, Takanobu;Shiraishi, Kentaro;Kashiwabara, Taigo;Tanaka, Masato;,期刊：Organic Letters, 页码：2689-2692 , 文章类型： 研究论文，,卷期：2008年10-13] The base-mediated intramol. cyclization reaction of 2-alkynylphenylphosphine oxides affords benzo[b]phosphole oxides (e.g. I), which show intense blue-green fluorescence. Benzo[b]phospholes were also prepd. by the redn. ... Electrophilic aromatic substitution reactions of 1,2-dihydro-1,2-azaborines. [Erratum to document cited in CA146:441839]. [作者：Pan, Jun;Kampf, Jeff W.;Ashe, Arthur J.;,期刊：Organic Letters, 页码：2917-2917 , 文章类型： 研究论文，,卷期：2008年10-13] On page 681, the Acknowledgement section should have included a statement thanking Mr. Joseph D. Davidson for performing some preliminary work on the bromination and deuteration of 1a. Iron-Catalyzed Intramolecular O-Arylation: Synthesis of 2-Aryl Benzoxazoles. [作者：Bonnamour, Julien;Bolm, Carsten;,期刊：Organic Letters, 页码：2665-2667 , 文章类型： 研究论文，,卷期：2008年10-13] A practical iron-catalyzed intramol. O-arylation reaction and its application in the synthesis of benzoxazole derivs., starting from the readily available 2-haloanilines, is presented. The key cyclization step involves ... Origin of Enantioselection in Hetero-Diels-Alder Reactions Catalyzed by Naphthyl-TADDOL. [作者：Anderson, Christopher D.;Dudding, Travis;Gordillo, Ruth;Houk, K. N.;,期刊：Organic Letters, 页码：2749-2752 , 文章类型： 研究论文，,卷期：2008年10-13] 1-dimethylamino-3-tert-butyldimethylsiloxy butadiene catalyzed by (R,R)-1-Np-TADDOL was studied using computational methods. A theor. rationale was developed through the combined use of mol. mechanics and ONIOM(B3LYP/6-...