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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58条记录   A New Family of Cinchona-Derived Bifunctional Asymmetric Phase-Transfer Catalysts: Application to the Enantio- and Diastereoselective Nitro-Mannich Reaction of Amidosulfones [作者：JOHNSON KAYLI M; RATTLEY MATT S; SLADOJEVICH FILIPPO; BARBER DAVID M; NUNEZ MARTA G; GOLDYS ANNA M; DIXON DARREN J,期刊：Organic Letters, 页码：2492-2495 , 文章类型： Article，,卷期：2012年14-10] A new family of bifunctional H-bond donor phase-transfer catalysts derived from cinchona alkaloids has been developed and evaluated in the enantio- and diastereoselective nitro-Mannich reaction of in situ generated N-Boc... Three-Component Organocascade Kinetic Resolution of Racemic Nitroallylic Acetates via Sequential Iminium/Enamine Asymmetric Catalysis [作者：ROY SUPARNA; CHEN KWUNMIN,期刊：Organic Letters, 页码：2496-2499 , 文章类型： Article，,卷期：2012年14-10] Nitroallylic acetates 1a-f have been kinetically resolved via an asymmetric three-component coupling that involves indoles, acrolein, and nitroolefin allylic acetates and is mediated by the chiral catalyst 2 (5 mol A). T... Synthesis and Studies of a Water-Soluble and Air-Stable Cu-I/Cu-II Open-Shell Funnel Complex [作者：THIABAUD GREGORY; BRUGNARA ANDREA; CARBONI MICHAEL; LE POUL NICOLAS; COLASSON BENOIT; LE MEST YVES; REINAUD OLIVIA,期刊：Organic Letters, 页码：2500-2503 , 文章类型： Article，,卷期：2012年14-10] The derivatization of the large rim of a TMPA-capped calix[6]arene (TMPA = tris(2-pyridylmethyl)amine) with three trimethylammonium groups enables the water-solubilization of two air-stable Cu(I)/Cu(II) complexes. These ... One-Pot Formation of Aromatic Tetraurea Macrocycles [作者：WU ZEHUI; HU TING; HE LAN; GONG BING,期刊：Organic Letters, 页码：2504-2507 , 文章类型： Article，,卷期：2012年14-10] Treating derivatives of m-phenylenediamine having different electron-richness and reactivities with triphosgene in the presence of triethylamine led to aromatic tetraurea rnacrocycles in high yields. Factors important fo... Mild and Ligand-Free Pd(II)-Catalyzed Conjugate Additions to Hindered gamma-Substituted Cyclohexenones [作者：JORDANHORE JAMES A; SANDERSON JAMES N; LEE AILAN,期刊：Organic Letters, 页码：2508-2511 , 文章类型： Article，,卷期：2012年14-10] Ligand-free cationic Pd(II) catalyst with NaNO3 as an additive is a highly active catalytic system for conjugate additions to sterically hindered gamma-substituted cyclohexenones. More challenging gamma gamma- and beta g... Synthesis of N-Alkoxycarbonyl Ketimines Derived from Isatins and Their Application in Enantioselective Synthesis of 3-Aminooxindoles [作者：YAN WENJIN; WANG DONG; FENG JINGCHAO; LI PENG; ZHAO DEPENG; WANG RUI,期刊：Organic Letters, 页码：2512-2515 , 文章类型： Article，,卷期：2012年14-10] A simple and general method in the synthesis of N-alkoxycarbonyl ketimines derived from isatins has been described first. Generally, the enantioselective addition of 1,3-dicarbonyl compounds to this kind of ketimine affo... Total Synthesis of (+/-)-Sorocenol B Employing Nanoparticle Catalysis [作者：CONG HUAN; PORCO JOHN A JR,期刊：Organic Letters, 页码：2516-2519 , 文章类型： Article，,卷期：2012年14-10] The total synthesis of (+/-)-sorocenol B has been accomplished featuring key steps including silver nanoparticle (AgNP)-catalyzed Diels-Alder cycloaddition and late-stage Pd(II)-catalyzed oxidative cyclization. The synth... Cycloisomerization versus Hydration Reactions in Aqueous Media: A Au(III)-NHC Catalyst That Makes the Difference [作者：TOMASMENDIVIL EDER; TOULLEC PATRICK Y; DIEZ JOSEFINA; CONEJERO SALVADOR; MICHELET VERONIQUE; CADIERNO VICTORIO,期刊：Organic Letters, 页码：2520-2523 , 文章类型： Article，,卷期：2012年14-10] A novel water-soluble Au(III)-NHC complex has been synthesized and successfully applied in the intramolecular cyclization of gamma-alkynoic acids into enol-lactones under biphasic toluene/water conditions, thus represent... Aphanamixoid A, a Potent Defensive Limonoid, with a New Carbon Skeleton from Aphanamixis polystachya [作者：CAI JIEYUN; ZHANG YU; LUO SHIHONG; CHEN DUOZHI; TANG GUIHUA; YUAN CHUNMAO; DI YINGTONG; LI SHENGHONG; HAO XIAOJIANG; HE HONGPING,期刊：Organic Letters, 页码：2524-2527 , 文章类型： Article，,卷期：2012年14-10] Aphanamixoid A (1), a limonoid with a new carbon skeleton, along with its biogenetically related limonoid aphanamixoid B (2), was isolated from the leaves and twigs of Aphanamixis polystachya. Their structures with the a... Dynamic Origin of the Stereoselectivity of a Nucleophilic Substitution Reaction [作者：BOGLE XAVIER S; SINGLETON DANIEL A,期刊：Organic Letters, 页码：2528-2531 , 文章类型： Article，,卷期：2012年14-10] A nucleophilic substitution on a dichlorovinyl ketone was studied experimentally and computationally. A mixture of products is observed experimentally, but a conventional computational analysis does not account for the f... A Novel Organic Sensitizer Combined with a Cobalt Complex Redox Shuttle for Dye-Sensitized Solar Cells [作者：QIN CHUANJIANG; PENG WENQIN; ZHANG KUN; ISLAM ASHRAFUL; HAN LIYUAN,期刊：Organic Letters, 页码：2532-2535 , 文章类型： Article，,卷期：2012年14-10] A novel donor-pi-acceptor organic dye (HIQ7) was used in dye-sensitized solar cells with a cobalt redox shuttle. The cells showed broad incident monochromatic photon-to-current conversion efficiency spectra covering the ... Palladium Catalyzed Carbonylative Heck Reaction Affording Monoprotected 1,3-Ketoaldehydes [作者：GOGSIG THOMAS M; NIELSEN DENNIS U; LINDHARDT ANDERS T; SKRYDSTRUP TROELS,期刊：Organic Letters, 页码：2536-2539 , 文章类型： Article，,卷期：2012年14-10] The direct carbonylative palladium catalyzed synthesis of monoprotected 1,3-ketoaldehydes is reported starting from aryl iodides applying near stoichiometric amounts of carbon monoxide. Besides representing platforms for... Total Synthesis of (-)-(alpha)-Kainic Acid via a Diastereoselective Intramolecular [3+2] Cycloaddition Reaction of an Aryl Cyclopropyl Ketone with an Alkyne [作者：LUO ZHI; ZHOU BING; LI YUANCHAO,期刊：Organic Letters, 页码：2540-2543 , 文章类型： Article，,卷期：2012年14-10] An enantioselective synthesis of (-)-(alpha)-kainic acid in 15 steps with an overall yield of 24% is reported. The pyrrolidine kainoid precursor with the required C2/C3 trans stereochemistry was prepared with complete di... Regioselective Synthesis of Heteroaryl Triflones by LDA (Lithium Diisopropylamide)-Mediated Anionic Thia-Fries Rearrangement [作者：XU XIUHUA; WANG XIN; LIU GUOKAI; TOKUNAGA ETSUKO; SHIBATA NORIO,期刊：Organic Letters, 页码：2544-2547 , 文章类型： Article，,卷期：2012年14-10] Novel heteroaryl triflones including oxindole, pyrazolone, pyridine, and quinoline derivatives have been regioselectively synthesized by LDA-mediated thia-Fries rearrangement for the first time. These reactions are also ... Enantioselective Rh(I)-Catalyzed Cyclization of Arylboron Compounds onto Ketones [作者：LOW DARRYL W; PATTISON GRAHAM; WIECZYSTY MARTIN D; CHURCHILL GWYDION H; LAM HON WAI,期刊：Organic Letters, 页码：2548-2551 , 文章类型： Article，,卷期：2012年14-10] Rhodium complexes based upon chiral sulfinamide-alkene, TADDOL-derived phosphoramidite, or diene ligands catalyze cyclizations of arylboron compounds ono ketones, generating a variety of products containing five-, six-, ... Assembly of N,N-Disubstituted Hydrazines and 1-Aryl-1H-indazoles via Copper-Catalyzed Coupling Reactions [作者：XIONG XIAODONG; JIANG YONGWEN; MA DAWEI,期刊：Organic Letters, 页码：2552-2555 , 文章类型： Article，,卷期：2012年14-10] Cul-catalyzed coupling of N-acyl-N-substituted hydrazines with aryl iodides takes place at 60-90 degrees C to afford N-acyl-N,N-disubstituted hydrazines regioselectively and thereby gives a facile method for assembling N...