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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49条记录   Catalytic Asymmetric Domino Michael Addition-Alkylation Reaction: Enantioselective Synthesis of Dihydrofurans [作者：RUEPING MAGNUS; PARRA ALEJANDRO; URIA UXUE; BESSELIEVRE FRANCOIS; MERINO ESTIBALIZ,期刊：Organic Letters, 页码：5680-5683 , 文章类型： Article，,卷期：2010年12-24] A catalytic enantioselective synthesis of dihydrofurans has been developed. 1,3-Dicarbonyl derivatives react with (E)-beta,beta-bromonitrostyrenes in the presence of a chiral bifunctional thiourea catalyst providing mild... Indium-Catalyzed Homo-Nazarov Cyclizations of Alkenyl Cyclopropyl Ketones [作者：PATIL DADASAHEB V; PHUN LIEN H; FRANCE STEFAN,期刊：Organic Letters, 页码：5684-5687 , 文章类型： Article，,卷期：2010年12-24] Herein, an efficient Lewis acid catalyzed protocol for the homo-Nazarov cyclizations of alkenyl cyclopropyl ketones is reported. Alkenes bearing beta-hydrogens (or silyl groups) provide 1.5:1 mixtures of methylene cycloh... Rhodium(III)-Catalyzed Synthesis of Isoquinolines from Aryl Ketone O-Acyloxime Derivatives and Internal Alkynes [作者：TOO PEI CHUI; WANG YIFENG; CHIBA SHUNSUKE,期刊：Organic Letters, 页码：5688-5691 , 文章类型： Article，,卷期：2010年12-24] A synthetic method of isoquinolines from aryl ketone O-acyloxime derivatives and internal allkynes has been developed using [Cp*RhCl2](2) NaOAc as the potential catalyst system. The present transformation is carried out ... Expeditious Synthesis of Phenanthridines from Benzylamines via Dual Palladium Catalysis [作者：MAESTRI GIOVANNI; LARRAUFIE MARIEHELENE; DERAT ETIENNE; OLLIVIER CYRIL; FENSTERBANK LOUIS; LACOTE EMMANUEL; MALACRIA MAX,期刊：Organic Letters, 页码：5692-5695 , 文章类型： Article，,卷期：2010年12-24] A method for the synthesis of phenanthridines from benzylamines and aryl iodides which uses a dual palladium-catalyzed process is developed. The domino sequence ends via an intramolecular amination and an oxidative dehyd... Highly Enantioselective Organocatalytic alpha-Amination Reactions of Aryl Oxindoles: Developing Designer Multifunctional Alkaloid Catalysts [作者：BUI TOMMY; HERNANDEZTORRES GLORIA; MILITE CIRO; BARBAS CARLOS F III,期刊：Organic Letters, 页码：5696-5699 , 文章类型： Article，,卷期：2010年12-24] An enantioselective alpha-amination of aryl oxindoles catalyzed by a dimeric quinidine has been developed. The reaction is general, broad in substrate scope, and affords the desired products in good yields with good to e... "One-Pot" Tandem C-H Borylation/1,4-Conjugate Addition/Reduction Sequence [作者：TAJUDDIN HAZMI; SHUKLA LENA; MAXWELL AOIFE C; MARDER TODD B; STEEL PATRICK G,期刊：Organic Letters, 页码：5700-5703 , 文章类型： Article，,卷期：2010年12-24] A microwave-assisted, one-pot, iridium-catalyzed aromatic C-H borylation/rhodium-catalyzed 1,4-conjugate addition sequence provides a highly robust protocol suitable for high-throughput array synthesis. Selective formati... Concise Synthesis of the Erythrina Alkaloid 3-Demethoxyerythratidinone via Combined Rhodium Catalysis [作者：JOO JUNG MIN; DAVID RAMONCITO A; YUAN YU; LEE CHULBOM,期刊：Organic Letters, 页码：5704-5707 , 文章类型： Article，,卷期：2010年12-24] The total synthesis of the erythrina alkaloid 3-demethoxyerythratidinone has been achieved via a strategy based on combined rhodium catalysis. The catalytic tandem cyclization effected by the interplay of allrynyl and vi... NHC-Catalyzed Intramolecular Redox Amidation for the Synthesis of Functionalized Lactams [作者：THAI KAREN; WANG LI; DUDDING TRAVIS; BILODEAU FRANCOIS; GRAVEL MICHEL,期刊：Organic Letters, 页码：5708-5711 , 文章类型： Article，,卷期：2010年12-24] A very efficient NHC-catalyzed lactamization reaction is reported. For most cases, the ring expansion reaction proceeds to cleanly furnish five- and six-membered N-Ts and N-Bn lactams, without the need for further purifi... Ligand-Mediated Highly Effective and Selective C-N Coupling for Synthesizing Bioactive N-Aryltriazole Acyclonucleosides [作者：FAN YUTING; XIA YI; TANG JINGJIE; ROCCHI PALMA; QU FANQI; IOVANNA JUAN; PENG LING,期刊：Organic Letters, 页码：5712-5715 , 文章类型： Article，,卷期：2010年12-24] N-aryltriazole nucleosides are new chemical entities with potential biological activity. The two phosphor ligands, Synphos and Xantphos, had a selective and effective impact on Pd-catalyzed C-N coupling with the 5- and 3... Highly Enantioselective Alkynylation of Trifluoropyruvate with Alkynylsilanes Catalyzed by the BINAP-Pd Complex: Access to alpha-Trifluoromethyl-Substituted Tertiary Alcohols [作者：AIKAWA KOHSUKE; HIOKI YUTA; MIKAMI KOICHI,期刊：Organic Letters, 页码：5716-5719 , 文章类型： Article，,卷期：2010年12-24] A highly enantioselective alkynylation catalyzed by the dicationic (S)-BINAP-Pd complex with a variety of alkynylsilanes and trifluoropyruvate is described. The catalytic reaction is applicable to highly enantioselective... Tuning Photosensitized Singlet Oxygen Generation Efficiency of Novel Aza-BODIPY Dyes [作者：ADARSH NAGAPPANPILLAI; AVIRAH REKHA R; RAMAIAH DANABOYINA,期刊：Organic Letters, 页码：5720-5723 , 文章类型： Article，,卷期：2010年12-24] Novel aza-BODIPY derivatives substituted with heavy atoms such as bromine and iodine were synthesized, and their triplet and singlet oxygen generation efficiencies have been investigated. These derivatives showed absorpt... Selective Synthesis of 7-Substituted Purines via 7,8-Dihydropurines [作者：KOTEK VLADISLAV; CHUDIKOVA NADEZDA; TOBRMAN TOMAS; DVORAK DALIMIL,期刊：Organic Letters, 页码：5724-5727 , 文章类型： Article，,卷期：2010年12-24] A simple and efficient protocol for the preparation of 7-substituted purines is described. 6- and 2,6-Dihalopurines were N-9-tritylated and then transformed to 7,8-dihydropurines by DIBAL-H. Subsequent N-7-alkylation fol... Bifunctional Organocatalyst for Activation of Carbon Dioxide and Epoxide To Produce Cyclic Carbonate: Betaine as a New Catalytic Motif [作者：TSUTSUMI YOSHIHIRO; YAMAKAWA KYOHEI; YOSHIDA MASAHIKO; EMA TADASHI; SAKAI TAKASHI,期刊：Organic Letters, 页码：5728-5731 , 文章类型： Article，,卷期：2010年12-24] Bifunctional organocatalysts bearing an ammonium betaine framework have been developed as a new catalytic motif for the activation of carbon dioxide and epoxides to produce cyclic carbonates. Three-Dimensional Structures of OSW-1 and Its Congener [作者：SAKURAI KAORI; FUKUMOTO TAKURO; NOGUCHI KEIICHI; SATO NORIYUKI; ASAKA HIROKI; MORIYAMA NAOMI; YOHDA MASAFUMI,期刊：Organic Letters, 页码：5732-5735 , 文章类型： Article，,卷期：2010年12-24] The 3D structures of an antitumor glycosylsterol OSW-1 and its closely related congener were investigated by NMR studies and an X-ray crystallographic analysis. The disaccharide moiety was found as a structural scaffold ... Palladium-Catalyzed Asymmetric Synthesis of Axially Chiral Allenylsilanes and Their Application to S(E)2 ' Chirality Transfer Reactions [作者：OGASAWARA MASAMICHI; OKADA ATSUSHI; SUBBARAYAN VELUSAMY; SOERGEL SEBASTIAN; TAKAHASHI TAMOTSU,期刊：Organic Letters, 页码：5736-5739 , 文章类型： Article，,卷期：2010年12-24] Stepwise application of the Pd-catalyzed S(N)2' reaction and the desilylative S(E)2' reaction to the ambivalent 2-bromo-1-silyl-1,3-dienes provides a novel route to the highly enantioselective construction of tertiary an... Friedel-Crafts Acylation of Pyrroles and Indoles using 1,5-Diazabicyclo[4.3.0]non-5-ene (DBN) as a Nucleophilic Catalyst [作者：TAYLOR JAMES E; JONES MATTHEW D; WILLIAMS JONATHAN M J; BULL STEVEN D,期刊：Organic Letters, 页码：5740-5743 , 文章类型： Article，,卷期：2010年12-24] 1,5-Diazabicyclo[4.3.0]non-5-ene (DBN) has been shown to be an effective catalyst for the regioselective Friedel-Crafts C-acylation of pyrroles and indoles in high yields. A detailed mechanistic study implies that DBN is...