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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   Application of the Superarmed Glycosyl Donor to Chemoselective Oligosaccharide Synthesis. [作者：Mydock, Laurel K.;Demchenko, Alexei V.;,期刊：Organic Letters, 页码：2107-2110 , 文章类型： 研究论文，,卷期：2008年10-11] Recently, we discovered a novel method for "superarming" glycosyl donors. Herein, this concept has been exemplified in one-pot oligosaccharide syntheses, whereby the superarmed glycosyl donor was chemoselectively activa... A Cyclotrimerization Route to Cannabinoids. [作者：Teske, Jesse A.;Deiters, Alexander;,期刊：Organic Letters, 页码：2195-2198 , 文章类型： 研究论文，,卷期：2008年10-11] Three members of the cannabinoid class, cannabinol I (R = H), cannabinol Me ether I (R = Me), and cannabinodiol II, were synthesized using a microwave-mediated [2 + 2 + 2] cyclotrimerization reaction as the key step. Th... Palladium-Catalyzed Formal Cycloaddition of Silacyclobutanes with Enones: Synthesis of Eight-Membered Cyclic Silyl Enolates. [作者：Hirano, Koji;Yorimitsu, Hideki;Oshima, Koichiro;,期刊：Organic Letters, 页码：2199-2201 , 文章类型： 研究论文，,卷期：2008年10-11] Treatment of silacyclobutanes with enones under palladium catalysis resulted in formal cycloaddn. to yield the corresponding eight-membered ring. The reaction provides a facile and convergent access to synthetically use... Efficient and Selective Peracetic Acid Epoxidation Catalyzed by a Robust Manganese Catalyst. [作者：Garcia-Bosch, Isaac;Company, Anna;Fontrodona, Xavier;Ribas, Xavi;Costas, Miquel;,期刊：Organic Letters, 页码：2095-2098 , 文章类型： 研究论文，,卷期：2008年10-11] A manganese catalyst contg. a tetradentate ligand derived from triazacyclononane exhibits high catalytic activity in epoxidn. reactions using peracetic acid as oxidant. The system exhibits broad substrate scope and requ... A Set of Homologous Hetarylenediyne Macrocycles by Oxidative Acetylene-Acetylene Coupling. [作者：Opris, Dorina M.;Ossenbach, Alexander;Lentz, Dieter;Schlueter, A. Dieter;,期刊：Organic Letters, 页码：2091-2093 , 文章类型： 研究论文，,卷期：2008年10-11] The synthesis of a set of bipyridine-contg. macrocycles by oxidative acetylene-acetylene dimerization is described. The cycles are sepd. by preparative GPC, and the smallest homolog is analyzed by single-crystal X-ray d... Catalytic Enantioselective Addition of Diorganozinc Reagents to Vinyl Sulfones. [作者：Desrosiers, Jean-Nicolas;Bechara, William S.;Charette, Andre B.;,期刊：Organic Letters, 页码：2315-2318 , 文章类型： 研究论文，,卷期：2008年10-11] An efficient method for the catalytic asym. conjugate addn. of diorganozinc reagents to vinyl sulfones (E)-RCH:CHSO2Py (R = Me, Me2CH, Ph, 4-MeOC6H4, 4-F3CC6H4, 2-naphthyl; Py = 2-pyridyl) is reported. Using a Binap稢u c... Low Temperature Organocopper-Mediated Two-Component Cross Coupling/Cycloisomerization Approach Toward N-Fused Heterocycles. [作者：Chernyak, Dmitri;Gadamsetty, Surendra Babu;Gevorgyan, Vladimir;,期刊：Organic Letters, 页码：2307-2310 , 文章类型： 研究论文，,卷期：2008年10-11] Organocopper reagents R1Cu(CN)Li (R1 = Me, n-Bu, s-Bu, t-Bu, n-hexyl) or PhCu smoothly react with heterocyclic propargyl mesylates, e.g. I (R2 = H, Me; R3 = H, Me, n-pentyl, Ph, 4-ClC6H4, 4-MeO2CC6H4, etc.) generated in ... Sc(OTf)3-Catalyzed or t-BuOK Promoted Tandem Reaction of 2-(2-(Alkynyl)benzylidene)malonate with Indole. [作者：Gao, Ke;Wu, Jie;,期刊：Organic Letters, 页码：2251-2254 , 文章类型： 研究论文，,卷期：2008年10-11] Tandem reaction of 2-(2-(alkynyl)benzylidene)malonate with indole was investigated. (Z)-1-Benzylidene-3-(1H-indol-1-yl)-1H-indene-2,2(3H)-dicarboxylate was generated in the presence of t-BuOK at room temp. 3-((1H-indol-3... Novel N-Phosphonio Imine-Catalyzed Epoxidation Reactions. [作者：Prieur, David;El Kazzi, Aimee;Kato, Tsuyoshi;Gornitzka, Heinz;Baceiredo, Antoine;,期刊：Organic Letters, 页码：2291-2294 , 文章类型： 研究论文，,卷期：2008年10-11] A new type of acyclic N-phosphonio imine catalyst for selective epoxidns. has been synthesized. The activity of these imine catalysts can easily be modulated by varying its substituents. The substituent attached to the... Stereoselective Alkylidenation of Ketones with 2-(p-Toluenesulfinyl)benzyl Iodide: Synthesis of Enantiomerically Pure Trisubstituted Epoxides. [作者：Arroyo, Yolanda;Meana, Angela;Sanz-Tejedor, M. Ascension;Garcia Ruano, Jose Luis;,期刊：Organic Letters, 页码：2151-2154 , 文章类型： 研究论文，,卷期：2008年10-11] Alkylidenation of arylmethyl, dialkyl, and cyclic ketones with 2-(p-toluenesulfinyl)benzyl iodide in the presence of NaN(SiMe3)2 takes place with a high or complete control of the facial selectivity at the carbonyl group... Twofold C-H Functionalization: Palladium-Catalyzed Ortho Arylation of Anilides. [作者：Brasche, Gordon;Garcia-Fortanet, Jorge;Buchwald, Stephen L.;,期刊：Organic Letters, 页码：2207-2210 , 文章类型： 研究论文，,卷期：2008年10-11] The ortho arylation of anilides R1C6H4NHR (R = Ac, R1 = 2-Me; R = pivaloyl, R1 = 3-Me, 2,3-Me2, 2-Me-4-MeO, etc.) to form biphenyls, e.g. I (R = 3-Me, 2-Me-4-MeO, 3-F, 2-F-4-Me), via a twofold C-H functionalization/C-C b... Asymmetric Total Synthesis of Antiochic Acid. [作者：Zhao, Yu-Jun;Loh, Teck-Peng;,期刊：Organic Letters, 页码：2143-2145 , 文章类型： 研究论文，,卷期：2008年10-11] The first asym. total synthesis of antiochic acid I using bioinspired polyene cyclization strategy is described. Reacting polyene II with acetal III gave tricyclic product IV which was transformed into I. Both good yie... An RCM Strategy to Stereodiverse d-Sultam Scaffolds. [作者：Jimenez-Hopkins, Maria;Hanson, Paul R.;,期刊：Organic Letters, 页码：2223-2226 , 文章类型： 研究论文，,卷期：2008年10-11] An asym. approach for the synthesis of substituted d-sultams with multiple synthetic handles is described. This study demonstrates the facile construction of a stereochem. diverse array of substituted d-sultams, more sp... Microwave-Accelerated Competing Domino Processes: A Tether-Controlled Dual Pathway into High Molecular Complexity. [作者：Elkhayat, Zobida;Safir, Imad;Castellote, Isabel;Retailleau, Pascal;Arseniyadis, Simeon;,期刊：Organic Letters, 页码：2219-2222 , 文章类型： 研究论文，,卷期：2008年10-11] Bicyclic unsatd. diols undergo a path selective modular domino transformation upon subjection to Pb(OAc)4, the reaction being biased to the nature of the angular substituent. The magnitude of the linking chain and the n... Aluminum Chloride-Mediated Acylation of Methylenecyclobutanes. A Facile Synthetic Protocol for the Construction of Substituted Cyclopentenes. [作者：Jiang, Min;Shi, Min;,期刊：Organic Letters, 页码：2239-2242 , 文章类型： 研究论文，,卷期：2008年10-11] Reactions of methylenecyclobutanes (MCBs) with acyl chlorides produce the corresponding substituted cyclopentene derivs. in moderate to high yields via ring enlargement in the presence of aluminum chloride under mild con... General, Robust, and Stereocomplementary Preparation of b-Ketoester Enol Tosylates as Cross-Coupling Partners Utilizing TsCl - N-Methylimidazole Agents. [作者：Nakatsuji, Hidefumi;Ueno, Kanako;Misaki, Tomonori;Tanabe, Yoo;,期刊：Organic Letters, 页码：2131-2134 , 文章类型： 研究论文，,卷期：2008年10-11] A general, robust, and cost-effective method for the (E)- or (Z)-stereocomplementary enol tosylation of b-ketoesters using TsCl-N-methylimidazole (NMI)-Et3N or LiOH has been developed. TsCl coupled with NMI formed a hig...