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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75条记录   Direct Access to Acylated Azobenzenes via Pd-Catalyzed C-H Functionalization and Further Transformation into an Indazole Backbone [作者：LI HONGJI; LI PINHUA; WANG LEI,期刊：Organic Letters, 页码：620-623 , 文章类型： Article，,卷期：2013年15-3] Azobenzenes were readily acylated at the 2-position through a Pd-catalyzed C-H functionalization from simple aromatic azo compounds and aldehydes in good yields. The obtained acylated azobenzenes could be efficiently con... Oxidative C-C Bond Cleavage of Aldehydes via Visible-Light Photoredox Catalysis [作者：SUN HONGNAN; YANG CHAO; GAO FEI; LI ZHE; XIA WUJIONG,期刊：Organic Letters, 页码：624-627 , 文章类型： Article，,卷期：2013年15-3] The visible-light mediated oxidative C-C bond cleavage of aldehydes has been achieved in good yields at ambient temperature and open to air using Ru(bpy)(3)Cl-2 (bpy = 2,2'-bipyridine) as the photoredox catalyst Moreover... Pd-Catalyzed P-C Cross-Coupling Reactions for Versatile Triarylphosphine Synthesis [作者：HAYASHI MINORU; MATSUURA TAKASHI; TANAKA IPPEI; OHTA HIDETOSHI; WATANABE YUTAKA,期刊：Organic Letters, 页码：628-631 , 文章类型： Article，,卷期：2013年15-3] Practical and versatile syntheses of tertiary phosphine derivatives have been achieved by palladium-catalyzed deformylative P-C cross-coupling reactions of hydroxymethylphosphine derivatives. Sequential couplings of orth... Solvent-Free Synthesis of alpha-Amino Nitrile-Derived Ureas [作者：VENTOSAANDRES PILAR; GONZALEZVERA JUAN A; TERESA GARCIALOPEZ M; HERRANZ ROSARIO,期刊：Organic Letters, 页码：632-635 , 文章类型： Article，,卷期：2013年15-3] An efficient and environmentally friendly methodology for the solvent-free synthesis of alpha-amino nitrile derived ureas from alpha-amino acid based amino nitriles has been developed. At room temperature no epimerizatio... Photoinduced Electron Transfer Promoted Radical Ring Expansion and Cyclization Reactions of alpha-(omega-Carboxyalkyl) beta-Keto Esters [作者：NISHIKAWA KEISUKE; ANDO TOMOKI; MAEDA KOUSUKE; MORITA TOSHIO; YOSHIMI YASUHARU,期刊：Organic Letters, 页码：636-638 , 文章类型： Article，,卷期：2013年15-3] Photoinduced electron transfer (PET) promoted decarboxylation of alpha-(omega-carboxyalkyl) beta-keto esters undergoes radical ring expansion and cyclization reactions. This mild and environmentally friendly method can p... Tritylamine as an Ammonia Surrogate in the Ugi Tetrazole Synthesis [作者：ZHAO TING; BOLTJES ANDRE; HERDTWECK EBERHARDT; DOEMLING ALEXANDER,期刊：Organic Letters, 页码：639-641 , 文章类型： Article，,卷期：2013年15-3] The role of tritylamine is introduced as a convenient ammonia substitute in the Ugi tetrazole synthesis. Fifteen examples and their mild cleavage products are described In satisfactory to good yields. N-Unsubstituted alp... Synthesis of Pyridopyrazine-1,6-diones from 6-Hydroxypicolinic Acids via a One-Pot Coupling/Cyclization Reaction [作者：TRAN TUAN P; MULLINS PATRICK B; ENDE CHRISTOPHER W AM; PETTERSSONS MARTIN,期刊：Organic Letters, 页码：642-645 , 文章类型： Article，,卷期：2013年15-3] A facile one-pot synthesis of 3,4-dihydro-1H-pyrido[1,2-a]pyrazine-1,6(2H)-diones (pyridopyrazine-1,6-diones) has been developed which employs a sequential coupling/cyclization reaction of 6-hydroxypicolinic acids and be... Distinctive Meta-Directing Group Effect for Iridium-Catalyzed 1,1-Diarylalkene Enantioselective Hydrogenation [作者：BESS ELIZABETH N; SIGMAN MATTHEW S,期刊：Organic Letters, 页码：646-649 , 文章类型： Article，,卷期：2013年15-3] An iridium-catalyzed asymmetric hydrogenation of 1,1-diarylkenes is described. Employing a novel, modular phosphoramidite ligand, PhosPrOx, in this transformation affords biologically relevant 1,1-diarylmethine products ... Cobalt-Catalyzed Acceptorless Alcohol Dehydrogenation: Synthesis of Imines from Alcohols and Amines [作者：ZHANG GUOQI; HANSON SUSAN K,期刊：Organic Letters, 页码：650-653 , 文章类型： Article，,卷期：2013年15-3] A cobalt catalyst has been developed for the acceptorless dehydrogenation of alcohols and applied to synthesize Imines from alcohols and amines. Deuterium labeling studies suggest that the reaction proceeds by an initial... Quantum Chemical Calculations of (1)J(CC) Coupling Constants for the Stereochemical Determination of Organic Compounds [作者：BIFULCO GIUSEPPE; RICCIO RAFFAELE; MARTIN GARY E; BUEVICH ALEXEI V; WILLIAMSON R THOMAS,期刊：Organic Letters, 页码：654-657 , 文章类型： Article，,卷期：2013年15-3] Quantum chemical calculations of one-bond carbon carbon coupling constants are demonstrated as potential probes for the configurational assignment of organic molecules. The stereochemical analysis of strychnine and its p... Total Synthesis of Chaetoquadrins A-C [作者：BIN KIM U; FURKERT DANIEL P; BRIMBLE MARGARET A,期刊：Organic Letters, 页码：658-661 , 文章类型： Article，,卷期：2013年15-3] The first total synthesis of the monoamine oxidase inhibitors chaetoquadrins A-C has been accomplished. Key steps in the synthesis include an aromatic Ciaisen rearrangement, asymmetric boron aidol reaction and acid-media... Colorimetric Hg2+ Sensing in Water: From Molecules toward Low-Cost Solid Devices [作者：ERMAKOVA ELIZAVETA; MICHALAK JULIEN; MEYER MICHEL; ARSLANOV VLADIMIR; TSIVADZE ASLAN; GUILARD ROGER; BESSMERTNYKHLEMEUNE ALLA,期刊：Organic Letters, 页码：662-665 , 文章类型： Article，,卷期：2013年15-3] A new colorimetric molecular sensor allowing for cheap, fast, sensitive, and highly selective naked-eye detection of Hg2+ In water is described. This molecule combines a 1,8-diaminoanthraquinone signaling subunit and pho... From Thia- to Selenadiazoles: Changing Interaction Priority [作者：LINDNER BENJAMIN D; COOMBS BENJAMIN A; SCHAFFROTH MANUEL; ENGELHART JENS U; TVERSKOY OLENA; ROMINGER FRANK; HAMBURGER MANUEL; BUNZ UWE H F,期刊：Organic Letters, 页码：666-669 , 文章类型： Article，,卷期：2013年15-3] The synthesis, optical, and electrochemical properties as well as solid-state structures of a series of alkynylated, benzannulated selenadiazoles are reported. This set of compounds Is compared to the lighter homologue s... Enantioselective Total Syntheses and Absolute Configuration of JBIR-02 and Mer-A2026B [作者：HOECKER JOHANNES; GADEMANN KARL,期刊：Organic Letters, 页码：670-673 , 文章类型： Article，,卷期：2013年15-3] The first total syntheses of the piericidin related natural products Mer-A2026B and JBIR-02 are reported. Key features of the synthetic approach involve an Ir-catalyzed one-pot C-H activation/oxidation procedure for the ... Polyflavanostilbene A, a New Flavanol-Fused Stilbene Glycoside from Polygonum cuspidatum [作者：LI FUSHUANG; ZHAN ZHILAI; LIU FU; YANG YANAN; LI LI; FENG ZIMING; JIANG JIANSHUANG; ZHANG PEICHENG,期刊：Organic Letters, 页码：674-677 , 文章类型： Article，,卷期：2013年15-3] Polyflavanostilbene A, a new flavanol-fused stilbene glycoside, was isolated from the rhizome of Polygonum cuspidatum. Its unusual structure, including its absolute stereochemistry, was determined by UV, IR, HRESIMS, and... syn-Selective Kobayashi Aldol Reaction Using Acetals [作者：TSUKADA HIROYUKI; MUKAEDA YUKI; HOSOKAWA SEIJIRO,期刊：Organic Letters, 页码：678-681 , 文章类型： Article，,卷期：2013年15-3] The Kobayashi aldol reaction has been used to construct anti-aldol products by remote stereoinduction. Since the product of the Kobayashi aldol reaction has a typical polyketide structure, this reaction has been applied ...