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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55条记录   Directed ortho-Metalation-Cross-Coupling Strategies. One-Pot Suzuki Reaction to Biaryl and Heterobiaryl Sulfonamides [作者：SCHNEIDER CEDRIC; BRODA ELLEN; SNIECKUS VICTOR,期刊：Organic Letters, 页码：3588-3591 , 文章类型： Article，,卷期：2011年13-14] A general synthesis of stable ortho-boropinacolato aryl and heteroaryl sulfonamides by directed ortho-metalation (DoM) and either MeOBPin or i-PrOBpin electrophile quench, 3 -> 4, is described. A one-pot metalation-Suzuk... Asymmetric Synthesis of Chiral delta-Lactones Containing Multiple Contiguous Stereocenters [作者：PEED JENNIFER; DOMINGUEZ IGNACIO PERINAN; DAVIES IWAN R; CHEESEMAN MATT; TAYLOR JAMES E; KOCIOKKOEHN GABRIELE; BULL STEVEN D,期刊：Organic Letters, 页码：3592-3595 , 文章类型： Article，,卷期：2011年13-14] A versatile methodology for the asymmetric synthesis of chiral delta-lactones containing multiple contiguous stereocenters has been developed that relies on a series of Evans' aldol, hydroxyl-directed cyclopropanation, m... Cu-Mediated Chemoselective Trifluoromethylation of Benzyl Bromides Using Shelf-Stable Electrophilic Trifluoromethylating Reagents [作者：KAWAI HIROYUKI; FURUKAWA TATSUYA; NOMURA YOSHINORI; TOKUNAGA ETSUKO; SHIBATA NORIO,期刊：Organic Letters, 页码：3596-3599 , 文章类型： Article，,卷期：2011年13-14] Copper-mediated chemoselective trifluoromethylation at the benzylic :position by the use of shelf-stable electrophilic trifluoromethylating reagents 3 in good to high yields under mild conditions is described for the fir... [n]Imperilenes: Stacked [n]Trannulenes Separated by Planar Cycloalkane Rings [作者：SHAKIB FARNAZ A; MOMENI MOHAMMAD R; WU JUDY I; SCHLEYER PAUL VON RAGUE; AZIZI ZAHRA; GHAMBARIAN MEHDI,期刊：Organic Letters, 页码：3600-3603 , 文章类型： Article，,卷期：2011年13-14] Two trannulene moieties fused to each other by means of perfectly planar cycloalkane rings comprise an interesting class of molecules (above) named "Imperilenes". Based on computed geometries and NICS(zz) values, only th... Combined Carbometalation-Zinc Homologation-Allylation Reactions as a New Approach for Alkoxyallylation of Aldehydes [作者：MEJUCH TOM; BOTOSHANSKY MARK; MAREK ILAN,期刊：Organic Letters, 页码：3604-3607 , 文章类型： Article，,卷期：2011年13-14] The combined carbometalation reaction of ynol ethers followed by a zinc homologation and further allylation reactions lead to an efficient preparation of allylic vicinal diols. The stereochemical outcome of the reaction ... Heterocyclic Radical Mediated Synthesis and Fluorescence Properties of Conjugated Polyene Ketones [作者：ZHANG XIANGDONG; YE JUNWEI; WANG SUNING; GONG WEITAO; LIN YUAN; NING GUILING,期刊：Organic Letters, 页码：3608-3611 , 文章类型： Article，,卷期：2011年13-14] A straightforward route for the preparation of decatetraene diketone derivates is presented. The synthesis has been accomplished by a one-step procedure starting from phenyl-substituted pyrylium perchlorates, and an elab... Glycoside Bond Formation via Acid-Base Catalysis [作者：KUMAR AMIT; KUMAR VIPIN; DERE RAVINDRA T; SCHMIDT RICHARD R,期刊：Organic Letters, 页码：3612-3615 , 文章类型： Article，,卷期：2011年13-14] Acid-base catalyzed glycosyl donor and then glycosyl acceptor activation with phenylboron difluoride or diphenylboron fluoride permits hydrogen bond mediated Intramolecular S(N)2-type glycosidation In generally high anom... Regioselective Transformation of O-Propargylic Arylaldoximes to Four-Membered Cyclic Nitrones by Copper-Catalyzed Skeletal Rearrangement [作者：NAKAMURA ITARU; ARAKI TOSHIHARU; ZHANG DONG; KUDO YU; KWON EUNSANG; TERADAU MASAHIRO,期刊：Organic Letters, 页码：3616-3619 , 文章类型： Article，,卷期：2011年13-14] (E)-O-Propargylic arylaldoximes were regioselectively converted, In the presence of copper catalysts, into their corresponding four-membered cyclic nitrones In good to excellent yields. The reactions proceeded via a tand... Concise Entry to Both Enantiomers of 8-Oxabicyclo[3.2.1]oct-3-en-2-one Based on Novel Oxidative Etherification: Formal Synthesis of (+)-Sundiversifolide [作者：KAWASUMI MUNEO; KANOH NAOKI; IWABUCHI YOSHIHARU,期刊：Organic Letters, 页码：3620-3623 , 文章类型： Article，,卷期：2011年13-14] Both enantiomers of 8-oxabicyclo[3.2.1]oct-3-en-2-one (6) have been synthesized from 4-hydroxycyclohept-2-enone (3) on the basis of a novel oxidative cyclo-etherification using PhI(OH)OTs (Koser's reagent). (-)-(1S,5R)-8... Effect of High Pressure on the Organocatalytic Asymmetric Michael Reaction: Highly Enantioselective Synthesis of gamma-Nitroketones with Quaternary Stereogenic Centers [作者：KWIATKOWSKI PIOTR; DUDZINSKI KRZYSZTOF; LYZWA DAWID,期刊：Organic Letters, 页码：3624-3627 , 文章类型： Article，,卷期：2011年13-14] The significant effect of hydrostatic pressure on the difficult organocatalytic 1,4-conjugate addition of nitroalkanes to prochiral sterically congested beta,beta-disubstituted enones is demonstrated. This approach allow... Highly Efficient Synthesis of Ketoheptoses [作者：WASCHKE DANIEL; THIMM JULIAN; THIEM JOACHIM,期刊：Organic Letters, 页码：3628-3631 , 文章类型： Article，,卷期：2011年13-14] A reliable, facile, high overall yielding and diastereoselective synthesis of ketoheptoses was developed and applied for preparation of the two most diabetogenic ketoheptoses as well as in a modified version for the synt... Allosteric P=O-Based Receptors for Dicarboxylic Acids [作者：JOSE D AMILAN; MON IGNASI; FERNANDEZPEREZ HECTOR; ESCUDEROADAN EDUARDO C; BENETBUCHHOLZ J; VIDALFERRAN ANTON,期刊：Organic Letters, 页码：3632-3635 , 文章类型： Article，,卷期：2011年13-14] The synthesis of new P=O-disubstituted receptors with appended crown ethers and their properties as receptors for dicarboxylic acids have been studied. High affinities have been observed (oxalic and malonic acids with 4-... A Concise Asymmetric Total Synthesis of (+)-Brevisamide [作者：HERRMANN AARON T; MARTINEZ STEVEN R; ZAKARIAN ARMEN,期刊：Organic Letters, 页码：3636-3639 , 文章类型： Article，,卷期：2011年13-14] A new protecting-group-free synthesis of the marine monocyclic ether (+)-brevisamide is reported. The enantioselective synthesis utilizes a key asymmetric Henry reaction and an Achmatowicz rearrangement for the formation... Regioselective Oxidative Coupling Reactions of 3-Substituted Thiophenes with Arylboronic Acids [作者：SCHNAPPERELLE INGO; BREITENLECHNER STEFAN; BACH THORSTEN,期刊：Organic Letters, 页码：3640-3643 , 文章类型： Article，,卷期：2011年13-14] Under optimized conditions, 3-substituted thiophenes (EWG = COOEt, PO(OEt)(2)) undergo a facile and regioselective oxidative coupling reaction at carbon atom C4. The reactions were performed with various aryl boronic aci... Total Synthesis and Absolute Configuration of (-)-Gummiferol [作者：TAKAMURA HIROYOSHI; WADA HIROKO; LU NAN; KADOTA ISAO,期刊：Organic Letters, 页码：3644-3647 , 文章类型： Article，,卷期：2011年13-14] Stereoselective synthesis of two possible diastereomers of (-)-gummiferol was accomplished by the stepwise epoxidation and Cadiot-Chodkiewicz reaction as the key transformations. Detailed comparison of their (1)H and (13... Palladium-Catalyzed Oxidative Rearrangement of Diaryl Alkenyl Carbinols to beta,beta-Diaryl alpha,beta-Unsaturated Ketones [作者：ROSA DAVID; ORELLANA ARTURO,期刊：Organic Letters, 页码：3648-3651 , 文章类型： Article，,卷期：2011年13-14] An unusual oxidative palladium-catalyzed rearrangement of diaryl alkenyl carbinols to beta,beta-diaryl alpha,beta-unsaturated ketones is described. The geometry of the alkene product is not determined by the electronic n...