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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113条记录   New Heteroannulation Reactions of N-Alkoxybenzamides by Pd(II) Catalyzed C-H Activation [作者：WRIGGLESWORTH JOE W; COX BRIAN; LLOYDJONES GUY C; BOOKERMILBURN KEVIN I,期刊：Organic Letters, 页码：5326-5329 , 文章类型： Article，,卷期：2011年13-19] A new palladium(II) catalyzed methodology for the direct synthesis of alkylidene isoindolinones from Al-alkoxybenzamides is presented. Isoindolinone formation proceeds through a highly efficient and E-selective C-H activ... Separate Deprotonation Reactions Converge Mechanistically for a New Cyclization of Benzyl 1-Alkynyl Sulfones [作者：HOSSEIN M SELIM; SCHWAN ADRIAN L,期刊：Organic Letters, 页码：5330-5333 , 文章类型： Article，,卷期：2011年13-19] A heretofore unknown LDA-induced conversion of benzyl 1-alkynyl sulfones to 1H-2-benzothiopyran-S,S-dioxides is demonstrated. A benzyl carbanion, accessible by two means, is thought to cyclize by temporary disruption of ... Synthesis and Evaluation of a Fluorescent Ritterazine-Cephalostatin Hybrid [作者：KUMAR KANDULURU ANANDA; LA CLAIR JAMES J; FUCHS PHILIP L,期刊：Organic Letters, 页码：5334-5337 , 文章类型： Article，,卷期：2011年13-19] The cephalostatin and ritterazine natural products comprise a potent family of bis-steroidal pyrazines that display potent single-digit nanomolar inhibition of tumor cell growth. An active fluorescent ritterazine-cephalo... One-Pot (1-Ethoxycarbonylcyclopropyl)-triphenylphosphonium Tetrafluoroborate Ring-Opening and Wittig Reaction [作者：CHUNG SEUNG WON; PLUMMER MARK S; MCALLISTER LAURA A; OLIVER ROBERT M III; ABRAMITE JOSEPH A; SHEN YUE; SUN JIANMIN; UCCELLO DANIEL P; ARCARI JOEL T; PRICE LOREN M; MONTGOMERY JUSTIN I,期刊：Organic Letters, 页码：5338-5341 , 文章类型： Article，,卷期：2011年13-19] An efficient method was developed for the synthesis of 2-methylene-4-substituted ethyl butyrates via cyclopropyl opening followed by a Wittig reaction. The desired products were formed in a two-step, one-pot reaction seq... Efficient and Direct Nucleophilic Difluoromethylation of Carbonyl Compounds and Imines with Me(3)SiCF(2)H at Ambient or Low Temperature [作者：ZHAO YANCHUAN; HUANG WEIZHOU; ZHENG JI; HU JINBO,期刊：Organic Letters, 页码：5342-5345 , 文章类型： Article，,卷期：2011年13-19] Since 1995, Me(3)SiCF(2)H has been widely believed to be an inefficient difluoromethylating agent, which requires harsh reaction conditions to cleave its rather inert Si-CF(2)H bond. However, it has now been found that, ... A Powerful Cascade Approach for Expeditious Synthesis of Trifluoromethylated Furans [作者：WANG YAO; LUO YONGCHUN; HU XIUQIN; XU PENGFEI,期刊：Organic Letters, 页码：5346-5349 , 文章类型： Article，,卷期：2011年13-19] A powerful approach to synthesize trifluoromethylated furans has been developed. The method is operationally simple, broad in substrate scope, and amenable to scale-up using trifluoroacetic anhydride. Meanwhile, the stra... Total Synthesis of (+)-Herboxidiene from Two Chiral Lactate-Derived Ketones [作者：PELLICENA MIGUEL; KRAEMER KATRINA; ROMEA PEDRO; URPI FELIX,期刊：Organic Letters, 页码：5350-5353 , 文章类型： Article，,卷期：2011年13-19] A substrate-controlled synthesis of (+)-herboxidiene from two lactate-derived chiral ketones is described. Remarkably, most of the carbon backbone was constructed through highly stereoselective titanium-mediated aldol re... Azadipyrromethene-Based Conjugated Oligomers with Near-IR Absorption and High Electron Affinity [作者：GAO LEI; SENEVIRATHNA WASANA; SAUVE GENEVIEVE,期刊：Organic Letters, 页码：5354-5357 , 文章类型： Article，,卷期：2011年13-19] Solution-processable conjugated oligomers incorporating red-light absorbing azadipyrromethenes (aza-DIPY) within the main chain were synthesized via palladium-catalyzed Sonogashira coupling reactions. Thin films of these... Cyanocuprates Convert Carboxylic Acids Directly into Ketones [作者：GENNA DOUGLAS T; POSNER GARY H,期刊：Organic Letters, 页码：5358-5361 , 文章类型： Article，,卷期：2011年13-19] Carboxylic acids were converted directly in 56-99% yields into methyl, n-butyl, and isopropyl ketones using excess cyanocuprates R(2)CuLi center dot LiCN. A substrate with a stereocenter alpha to the carboxylic acid was ... Panchromatic Push-Pull Chromophores based on Triphenylamine as Donors for Molecular Solar Cells [作者：GOMEZ ESTEBAN SANDRA; DE LA CRUZ PILAR; ALJARILLA ANA; ARELLANO LUIS M; LANGA FERNANDO,期刊：Organic Letters, 页码：5362-5365 , 文章类型： Article，,卷期：2011年13-19] Two new push pull chromophores based on triphenylamine as donor and 2-carboxymethyl-2-cyanomethylenethiazole as acceptor have been synthesized. Both exhibit strong light absorption covering from 300 to 800 nm. Electroche... Formal Diels-Alder Reactions of Chalcones and Formylcyclopropanes Catalyzed by Chiral N-Heterocyclic Carbenes [作者：LV HUI; MO JUNMING; FANG XINQIANG; CHI YONGGUI ROBIN,期刊：Organic Letters, 页码：5366-5369 , 文章类型： Article，,卷期：2011年13-19] Highly enantioselective (formal) hetero-Diels-Alder reactions between chalcones and formylcyclopropanes are disclosed. The challenging N-heterocyclic carbene (NHC)-bounded enolate intermediates from formylcyclopropanes w... Rhodium-Catalyzed Cross-Coupling Reaction of Arylboronates and Diazoesters and Tandem Alkylation Reaction for the Synthesis of Quaternary alpha,alpha-Heterodiaryl Carboxylic Esters [作者：TSOI YUKTAI; ZHOU ZHONGYUAN; YU WINGYIU,期刊：Organic Letters, 页码：5370-5373 , 文章类型： Article，,卷期：2011年13-19] A rhodium-catalyzed one-pot three-component coupling reaction was developed for the synthesis of quaternary alpha,alpha-heterodiaryl carboxylic esters. This reaction involves cross-coupling of the arylrhodium(I) complexe... N-Capping of Primary Amines with 2-Acyl-benzaldehydes To Give Isoindolinones [作者：AUGNER DANIEL; GERBINO DARIO C; SLAVOV NIKOLAY; NEUDOERFL JOERGMARTIN; SCHMALZ HANSGUENTHER,期刊：Organic Letters, 页码：5374-5377 , 文章类型： Article，,卷期：2011年13-19] A unique reactivity pattern, first observed in the conversion of the marine natural product pestalone into pestalachloride A, was investigated. It was shown that 2-formyl-arylketones smoothly react with ammonia and prima... Enantioselective Synthesis of Dihydropyridinones via NHC-Catalyzed Aza-Claisen Reaction [作者：WANNER BENEDIKT; MAHATTHANANCHAI JESSADA; BODE JEFFREY W,期刊：Organic Letters, 页码：5378-5381 , 文章类型： Article，,卷期：2011年13-19] N-Heterocyclic carbene catalyzed aza-Claisen annulations of enals or their alpha'-hydrozyenone surrogates with vinylogous amides afford dihydropyridinones. The reaction proceeds with a broad range of substrates, and no n... An Enantioselective Formal Synthesis of Berkelic Acid [作者：MCLEOD MICHAEL C; WILSON ZOE E; BRIMBLE MARGARET A,期刊：Organic Letters, 页码：5382-5385 , 文章类型： Article，,卷期：2011年13-19] An enantioselective formal synthesis of berkelic acid is described. The key step Involves a late-stage silyl enol ether addition to a benzannulated oxonium ion with subsequent spiroketalization leading to construction of... Microwave-Assisted Solventless Reaction of Iridium-Catalyzed Alkylation of Amines with Alcohols in the Absence of Base [作者：ZHANG WEIXING; DONG XIAOCHUN; ZHAO WEILI,期刊：Organic Letters, 页码：5386-5389 , 文章类型： Article，,卷期：2011年13-19] Microwave-assisted iridium catalyzed alkylation of amines with alcohols was undertaken under solvent-free and base-free conditions. Such alkylation reactions are green, atom-economic, and effective for mono-, di-, and tr...