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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80条记录   Synthesis and In Vivo Evaluation of 4-Deoxy-4,4-difluoro-KRN7000. [作者：Leung, Leo;Tomassi, Cyrille;Van Beneden, Katrien;Decruy, Tine;Elewaut, Dirk;Elliott, Tim;Al-Shamkhani, Aymen;Ottensmeier, Christian;Van Calenbergh, Serge;Werner, Joern;Williams, Tony;Linclau, Bruno;,期刊：Organic Letters, 页码：4433-4436 , 文章类型： 研究论文，,卷期：2008年10-20] phytosphingosine is described. Key steps include a regioselective benzylation of azidophytosphingosine and a deoxofluor-mediated fluorination of the corresponding 4-ketone. This fluorination failed completely when the ... A Convenient Negishi Protocol for the Synthesis of Glycosylated Oligo(ethynylene)s. [作者：Hoheisel, Tobias N.;Frauenrath, Holger;,期刊：Organic Letters, 页码：4525-4528 , 文章类型： 研究论文，,卷期：2008年10-20] A convenient and efficient sp-sp carbon heterocoupling protocol based on the Negishi reaction was developed, in which the required zinc diacetylide was generated from 1,4-bis(trimethylsilyl)butadiyne in situ and reacted ... De Novo Asymmetric Synthesis and Biological Evaluation of the Trisaccharide Portion of PI-080 and Vineomycin B2. [作者：Yu, Xiaomei;O'Doherty, George A.;,期刊：Organic Letters, 页码：4529-4532 , 文章类型： 研究论文，,卷期：2008年10-20] a-L-rhodinose, and b-D-olivose trisaccharide is described. The key transformations include the palladium-catalyzed glycosylation, Myers' reductive rearrangement, diastereoselective dihydroxylation, and regioselective Mi... The First Synthesis of a Thioglycoside Analogue of the Immunostimulant KRN7000. [作者：Dere, Ravindra T.;Zhu, Xiangming;,期刊：Organic Letters, 页码：4641-4644 , 文章类型： 研究论文，,卷期：2008年10-20] potential immunostimulant, is described. Two key intermediates are a-galactosyl thiol and phytosphingosine deriv., which were both prepd. from D-galactose. The First Synthesis of a Novel 5:7:5-Fused Diimidazodiazepine Ring System and Some of Its Chemical Properties. [作者：Kumar, Raj;Ujjinamatada, Ravi K.;Hosmane, Ramachandra S.;,期刊：Organic Letters, 页码：4681-4684 , 文章类型： 研究论文，,卷期：2008年10-20] Compounds (More Than One Hetero Atom)) Section The first synthesis of a novel 5:7:5-fused heterocyclic ring system (I), a diimidazodiazepine, is reported. The propensity of the ring system to undergo facile, acid-cataly... Potassium t-Butoxide Alone Can Promote the Biaryl Coupling of Electron-Deficient Nitrogen Heterocycles and Haloarenes. [作者：Yanagisawa, Shuichi;Ueda, Kirika;Taniguchi, Tadashi;Itami, Kenichiro;,期刊：Organic Letters, 页码：4673-4676 , 文章类型： 研究论文，,卷期：2008年10-20] The biaryl coupling of electron-deficient nitrogen heterocycles and haloarenes can be promoted by potassium t-butoxide alone, without the addn. of any exogenous transition metal species. Electron-deficient nitrogen hete... Synthesis of Highly Functionalized 2(1H)-Pyrazinone 3-Carboxamide Scaffolds. [作者：Pawar, Sonalika V.;Pawar, Vijaykumar G.;Dehaen, Wim;De Borggraeve, Wim M.;,期刊：Organic Letters, 页码：4473-4476 , 文章类型： 研究论文，,卷期：2008年10-20] The synthesis of highly functionalized 2(1H)-pyrazinone 3-carboxamide derivs. is reported. A one-pot, two-step process including the base-mediated reaction of N,N-disubstituted aminoacetonitrile deriv. I with 3,5-dichlo... A Highly Stereoselective Organocatalytic Tandem Aminoxylation/Aza-Michael Reaction for the Synthesis of Tetrahydro-1,2-Oxazines. [作者：Zhu, Di;Lu, Min;Chua, Pei Juan;Tan, Bin;Wang, Fei;Yang, Xinhao;Zhong, Guofu;,期刊：Organic Letters, 页码：4585-4588 , 文章类型： 研究论文，,卷期：2008年10-20] A facile stereoselective synthesis of multifunctionalized tetrahydro-1,2-oxazines (THOs) has been achieved by the organocatalyzed asym. tandem a-aminoxylation/aza-Michael reaction for the C-O/C-N bond formations in moder... Catalytic enantioselective addition of diorganozinc reagents to vinyl sulfones. [Erratum to document cited in CA149:009855]. [作者：Desrosiers, Jean-Nicolas;Bechara, William S.;Charette, Andre B.;,期刊：Organic Letters, 页码：4709-4709 , 文章类型： 研究论文，,卷期：2008年10-20] On page 2315, due to a processing error, the author William S. Bechara was acknowledged with an asterisk as the corresponding author. All correspondence should only be sent to Andre B. Charette. Direct Transition-Metal-Free Intramolecular Arylation of Phenols. [作者：Bajracharya, Gan B.;Daugulis, Olafs;,期刊：Organic Letters, 页码：4625-4628 , 文章类型： 研究论文，,卷期：2008年10-20] Direct transition-metal-free, base-mediated intramol. arylation of phenols with aryl halides has been developed. In the presence of 2.5 equiv of t-BuOK in dioxane at 140 癈, the intramol. cyclization of 3-(2-halobenzylox... Platinum-Catalyzed Enantioselective Tandem Alkylation/Arylation of Primary Phosphines. Asymmetric Synthesis of P-Stereogenic 1-Phosphaacenaphthenes. [作者：Anderson, Brian J.;Guino-o, Marites A.;Glueck, David S.;Golen, James A.;DiPasquale, Antonio G.;Liable-Sands, Louise M.;Rheingold, Arnold L.;,期刊：Organic Letters, 页码：4425-4428 , 文章类型： 研究论文，,卷期：2008年10-20] (Organometallic and Organometalloidal Compounds) Section Enantioselective tandem alkylation/arylation of primary phosphines with complexes gave P-stereogenic 1-phosphaacenaphthenes (AcePhos) in up to 74% ee. Diastereose... Total Synthesis of Neolaulimalide and Isolaulimalide. [作者：Gollner, Andreas;Mulzer, Johann;,期刊：Organic Letters, 页码：4701-4704 , 文章类型： 研究论文，,卷期：2008年10-20] The first total syntheses of the potential antitumoral leads neolaulimalide (I) and isolaulimalide (II) have been achieved. Key steps in our convergent, fully stereocontrolled route are a Yamaguchi macrolactonization, a... Expeditious Total Syntheses of Natural Allenic Products via Aromatic Ring Umpolung. [作者：Sabot, Cyrille;Berard, Didier;Canesi, Sylvain;,期刊：Organic Letters, 页码：4629-4632 , 文章类型： 研究论文，,卷期：2008年10-20] Concise diastereoselective syntheses of the marine (?-panacene I (R1 = Br, R2 = H) and terrestrial (?-desbromopanacene I (R1 = R2 = H), as well as (?-epi-panacene I (R1 = H, R2 = Br), were achieved in a few steps based o... Copper-Catalyzed One-Pot Multicomponent Coupling Reaction of Phenols, Amides, and 4-Bromphenyl Iodide. [作者：Chen, Wenming;Li, Jianjun;Fang, Dongmei;Feng, Chun;Zhang, Chenggang;,期刊：Organic Letters, 页码：4565-4568 , 文章类型： 研究论文，,卷期：2008年10-20] An efficient copper-catalyzed multicomponent reaction of phenols, amides, and 4-bromphenyl iodide was developed that uses com. available N,N-dimethylglycine as the ligand. This multicomponent reaction proceeds in modera... Convergent and General One-Step DNA-Catalyzed Synthesis of Multiply Branched DNA. [作者：Mui, Timothy P.;Silverman, Scott K.;,期刊：Organic Letters, 页码：4417-4420 , 文章类型： 研究论文，,卷期：2008年10-20] We report a deoxyribozyme (DNA enzyme) that catalyzes the convergent and general synthesis of branched DNA. The 15HA9 deoxyribozyme mediates nucleophilic attack of the 2'-hydroxyl group of a ribonucleotide embedded with... A Light-Harvesting Array Composed of Porphyrins and Rigid Backbones. [作者：Kozaki, Masatoshi;Uetomo, Atsuhiro;Suzuki, Shuichi;Okada, Keiji;,期刊：Organic Letters, 页码：4477-4480 , 文章类型： 研究论文，,卷期：2008年10-20] A light-harvesting array contg. rigid backbones, peripherally positioned Zn-porphyrin terminals, and a free-base (Fb) porphyrin core was prepd. by a convergent method where the Sonogashira coupling reaction was used in t...