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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84条记录   Thermal [2+2] Cycloaddition of Morpholinoenamines with C(60) via a Single Electron Transfer [作者：MIKIE TSUBASA; ASAHARA HARUYASU; NAGAO KAZUAKI; IKUMA NAOHIKO; KOKUBO KEN; OSHIMA TAKUMI,期刊：Organic Letters, 页码：4244-4247 , 文章类型： Article，,卷期：2011年13-16] The thermal reaction of C(60) with five- and six-membered morpholinocycloalkenes in refluxing toluene exclusively gave the [2 + 2] cycloadducts In high yields. However, a seven-membered homologue sluggishly reacted with ... Photoactivatable Phospholipids Bearing Tetrafluorophenylazido Chromophores Exhibit Unprecedented Protonation-State -Dependent (19)F NMR Signals [作者：XIA YI; QU FANQI; MAGGIANI ALAIN; SENGUPTA KHEYA; LIU CHENG; PENG LING,期刊：Organic Letters, 页码：4248-4251 , 文章类型： Article，,卷期：2011年13-16] Phospholipids bearing tetrafluorophenylazido chromophores were synthesized with perfectly conserved amphiphilicity and photochemical activity. Interestingly however, those phospholipids harboring the amine-linked chromop... Enantioselective Formal Synthesis of Palmerolide A [作者：PRASAD KAVIRAYANI R; PAWAR AMIT B,期刊：Organic Letters, 页码：4252-4255 , 文章类型： Article，,卷期：2011年13-16] Enantioselective formal synthesis of macrolactone palmerolide A, a polyketide marine natural product, is described. Key strategies in the synthesis include the oxidative furan ring-opening of a chiral furyl carbinol for ... Ring Opening/C-N Cyclization of Activated Aziridines with Carbon Nucleophiles: Highly Diastereo- and Enantioselective Synthesis of Tetrahydroquinolines [作者：GHORAI MANAS K; NANAJI Y; YADAV A K,期刊：Organic Letters, 页码：4256-4259 , 文章类型： Article，,卷期：2011年13-16] A simple strategy for the synthesis of substituted tetrahydroquinolines through regio- and stereoselective ring opening of N-tosyl aziridines with carbon nucleophiles generated from 2-(bromoaryl)acetonitriles followed by... Chiral Sulfinamide/Achiral Sulfonic Acid Cocatalyzed Enantioselective Protonation of Enol Silanes [作者：BECK ELIZABETH M; HYDE ALAN M; JACOBSEN ERIC N,期刊：Organic Letters, 页码：4260-4263 , 文章类型： Article，,卷期：2011年13-16] The application of chiral sulfinamides and achiral sulfonic acids as a cocatalyst system for enantioselective protonation reactions is described. Structurally simple, easily accessible sulfinamides were found to Induce m... Asymmetric Decarboxylative Allylation of Oxindoles [作者：FRANCKEVICIUS VILIUS; CUTHBERTSON JAMES D; PICKWORTH MARK; PUGH DAVID S; TAYLOR RICHARD J K,期刊：Organic Letters, 页码：4264-4267 , 文章类型： Article，,卷期：2011年13-16] An asymmetric decarboxylative palladium-catalyzed allylation of alkyl- and aryl-substituted oxindoles has been developed, enabling the installation of an all-carbon quaternary chiral center at the oxindole 3-position in ... Rapid Assembly of Quinolizidines via Consecutive Nucleophilic Cyclizations onto Activated Amides [作者：BELANGER GUILLAUME; OBRIEN GARY; LAROUCHEGAUTHIER ROBIN,期刊：Organic Letters, 页码：4268-4271 , 文章类型： Article，,卷期：2011年13-16] A new approach to the synthesis of quinolizidines involving a cascade of nucleophilic cyclizations triggered by chemoselective amide activation is reported. Particular attention was given to the effect of the nature of t... Regio- and Stereoselective Synthesis of Multisubstituted Olefins and Conjugate Dienes by Using alpha-Oxo Ketene Dithioacetals as the Building Blocks [作者：JIN WEIWEI; DU WANGMING; YANG QIN; YU HAIFENG; CHEN JIPING; YU ZHENGKUN,期刊：Organic Letters, 页码：4272-4275 , 文章类型： Article，,卷期：2011年13-16] An efficient palladium(0)-catalyzed, Cu(I)-mediated synthetic route to trisubstituted olefins and conjugate dienes has been developed via oxo directing Liebeskind-Srogl cross-coupling reactions of gem-dihaloolefin-type a... A Novel and Highly Stereoselective Synthesis of 2-Substituted Perhydrofuro[2,3-b]pyran Derivatives [作者：MA XIAOFENG; TIAN QIANG; TANG QIN; ZHAO JINZHONG; SHAO HUAWU,期刊：Organic Letters, 页码：4276-4279 , 文章类型： Article，,卷期：2011年13-16] An effective and facile method for the synthesis of 2-substituted perhydrofuro[2,3-b]pyran derivatives Is described. The cyclization of 2-C-aldehydo-2-deoxy-D-thioglucoside in the presence of N-iodosuccinimide (NIS) is h... Indium(III)-Catalyzed Hydrative Cyclization of 1,7-Diynyl Ethers [作者：GIBEAU AMANDA L; SNYDER JOHN K,期刊：Organic Letters, 页码：4280-4283 , 文章类型： Article，,卷期：2011年13-16] A new hydrative cyclization of 1,7- and 1,8-diynyl ethers is reported. Using catalytic InI(3) and p-TSA as a cocatalyst, several 2,2-disubstituted tetrahydrofurans with exocyclic enone appendages were prepared. Reaction ... Thermally Induced Cycloadditions of Donor/Acceptor Carbenes [作者：OVALLES STEPHANIE R; HANSEN JORN H; DAVIES HUW M L,期刊：Organic Letters, 页码：4284-4287 , 文章类型： Article，,卷期：2011年13-16] The thermal decomposition of aryldiazoacetates and aryldiazoketones in the absence of a catalyst leads to synthetically useful transformations. The thermal reaction of aryldiazoacetates with alkenes generates cyclopropan... Catalytic Migratory Oxidative Coupling of Nitrones [作者：HASHIZUME SHOGO; OISAKI KOUNOSUKE; KENAI MOTOMU,期刊：Organic Letters, 页码：4288-4291 , 文章类型： Article，,卷期：2011年13-16] A Cu(I)-catalyzed migratory oxidative coupling between nitrones and heterocycles or a methylamine is described. Selective C-C bond-formation proceeds through cleavage of two C(sp(3))-H bonds concomitant with C=N double b... [1,5]-H Shift of Aldehyde Hydrogen in Dienal Compounds to Produce Ketenes [作者：SAKAGUCHI TAKU; OKUNO YUDAI; TSUTSUMI YOHEI; TSUCHIKAWA HIROSHI; KATSUMURA SHIGEO,期刊：Organic Letters, 页码：4292-4295 , 文章类型： Article，,卷期：2011年13-16] In 3-ethozycarbony1-2,4-dienal compounds, a thermal [1,5]-H shift of aldehyde hydrogen easily proceeded to produce the corresponding vinyl ketenes due to the remarkable substituent effect caused by the C3 ester group. Th... A Stereoselective Inverting sec-Alkylsulfatase for the Deracemization of sec-Alcohols [作者：SCHOBER MARKUS; GADLER PETRA; KNAUS TANJA; KAYER HEIDEMARIE; BIRNERGRUENBERGER RUTH; GUELLY CHRISTIAN; MACHEROUX PETER; WAGNER ULRIKE; FABERT KURT,期刊：Organic Letters, 页码：4296-4299 , 文章类型： Article，,卷期：2011年13-16] A metallo-beta-lactamase-type alkylsulfatase was found to catalyze the enantioselective hydrolysis of sec,alkylsulfates with strict inversion of configuration. This catalytic event, which does not have an analog in chemo... Kinetic Profiling of Prolinate-Catalyzed alpha-Amination of Aldehydes [作者：HEIN JASON E; ARMSTRONG ALAN; BLACKMOND DONNA G,期刊：Organic Letters, 页码：4300-4303 , 文章类型： Article，,卷期：2011年13-16] Deconvolution of the role of off-cycle species from the desired catalytic cycle leads to an optimized protocol for the prolinate-catalyzed amination of aldehydes. The scope of complex reaction networks will be greatly br... An Unexpected Directing Effect in the Asymmetric Transfer Hydrogenation of alpha,alpha-Disubstituted Ketones [作者：SONI RINA; COLLINSON JOHNMICHAEL; CLARKSON GUY C; WILLS MARTIN,期刊：Organic Letters, 页码：4304-4307 , 文章类型： Article，,卷期：2011年13-16] alpha,alpha-Disubstituted ketones containing an aromatic ring or alkene are reduced in high enantiomeric excess using an asymmetric transfer hydrogenation catalyst. The sense of reduction indicates that the unsaturated r...