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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66条记录   Palladium-Catalyzed Cascade Process Consisting of Isocyanide Insertion and Benzylic C(sp(3))-H Activation: Concise Synthesis of Indole Derivatives [作者：NANJO TAKESHI; TSUKANO CHIHIRO; TAKEMOTO YOSHIJI,期刊：Organic Letters, 页码：4270-4273 , 文章类型： Article，,卷期：2012年14-16] Synthesis of the indole skeleton was achieved using a Pd-catalyzed cascade process consisting of isocyanide insertion and benzylic C(sp(3))-H activation. It was found that slow addition of isocyanide is effective for red... Efficient and Selective Multicomponent Oxidative Coupling of Two Different Aliphatic Primary Amines into Thioamides by Elemental Sulfur [作者：THANH BINH NGUYEN; ERMOLENKO LUDMILA; ALMOURABIT ALI,期刊：Organic Letters, 页码：4274-4277 , 文章类型： Article，,卷期：2012年14-16] An efficient and selective multicomponent oxidative coupling of two different aliphatic primary amines into thioamides by elemental sulfur under solvent-free conditions has been developed. Asymmetric Synthesis of the Tropane Alkaloid (+)-Pseudococaine via Ring-Closing Iodoamination [作者：BROCK E ANNE; DAVIES STEPHEN G; LEE JAMES A; ROBERTS PAUL M; THOMSON JAMES E,期刊：Organic Letters, 页码：4278-4281 , 文章类型： Article，,卷期：2012年14-16] Ring-closing iodoamination of terf-butyl 2-hydroxy-7[N-methyl-N-(alpha-methyl-p-methoxybenzyl)amino]cyclohept-3-ene-1-carboxylates proceeds with concomitant loss of the N-alpha-methyl-p-methoxybenzyl group to give the co... Cyclization Strategies to Polyenes Using Pd(II)-Catalyzed Couplings of Pinacol Vinylboronates [作者：IAFE ROBERT G; CHAN DANIEL G; KUO JONATHAN L; BOON BYRON A; FAIZI DARIUS J; SAGA TOMOMI; TURNER JONATHAN W; MERLIC CRAIG A,期刊：Organic Letters, 页码：4282-4285 , 文章类型： Article，,卷期：2012年14-16] As a complement to Pd(0)-catalyzed cyclizations, seven Pd(II)-catalyzed cyclization strategies are reported. alpha,omega-Diynes are selectively hydroborated to bis(boronate esters), which cyclize under Pd(II)-catalysis p... Nickel-Catalyzed Diastereoselective Alkyl-Alkyl Kumada Coupling Reactions [作者：GARCIA PABLO M PEREZ; DI FRANCO THOMAS; ORSINO ALESSIO; REN PENG; HU XILE,期刊：Organic Letters, 页码：4286-4289 , 文章类型： Article，,卷期：2012年14-16] A nickel pincer complex is found to catalyze alkyl-alkyl Kumada coupling reactions of 1,3- and 1,4-substituted cyclohexyl halides and tetrahydropyrans with an excellent diastereoselectivity. The mechanistic investigation... Total Synthesis of Aspercyclides A and B via Intramolecular Oxidative Diaryl Ether Formation [作者：YOSHINO TATSUYA; SATO ITARU; HIRAMA MASAHIRO,期刊：Organic Letters, 页码：4290-4292 , 文章类型： Article，,卷期：2012年14-16] A highly efficient total synthesis of the 11-membered cyclic aspercyclides A (1) and B (2) has been achieved by chemo- and regioselective intramolecular oxidative C-O bond formation from differently substituted diphenols... Traceless Directing Group for Stereospecific Nickel-Catalyzed Alkyl-Alkyl Cross-Coupling Reactions [作者：GREENE MARGARET A; YONOVA IVELINA M; WILLIAMS FLORENCE J; JARVO ELIZABETH R,期刊：Organic Letters, 页码：4293-4296 , 文章类型： Article，,卷期：2012年14-16] Stereospecific nickel-catalyzed cross-coupling reactions of benzylic 2-methoxyethyl ethers are reported for the preparation of enantioenriched 1,1-diarylethanes. The 2-methoxyethyl ether serves as a traceless directing g... First Enantioselective Total Synthesis of (+)-(R)-Pinnatolide Using an Asymmetric Domino Allylation Reaction [作者：TIETZE LUTZ F; WOLFRAM THOMAS; HOLSTEIN JULIAN J; DITTRICH BIRGER,期刊：Organic Letters, 页码：4035-4037 , 文章类型： Article，,卷期：2012年14-16] An efficient total synthesis of (+)-(R)-Pinnatolide is described. As a key step an asymmetric multicomponent domino allylation reaction of methyl levulinate is used to form the quaternary stereogenic center in a highly s... Synthesis of Frame-Shifted Farnesyl Diphosphate Analogs [作者：PLACZEK ANDREW T; HOUGLAND JAMES L; GIBBS RICHARD A,期刊：Organic Letters, 页码：4038-4041 , 文章类型： Article，,卷期：2012年14-16] A set of synthetic approaches were developed and applied to the synthesis of eight frame-shifted farnesyl diphosphate (FPP) analogs. These analogs bear increased or decreased methylene units between the double bonds and/... Biomimetic Synthesis and Proposal of Relative and Absolute Stereochemistry of Heronapyrrole C [作者：SCHMIDT JENS; STARK CHRISTIAN B W,期刊：Organic Letters, 页码：4042-4045 , 文章类型： Article，,卷期：2012年14-16] The first synthesis of (-)-heronapyrrole C, the enantiomer of a unique farnesylated 2-nitropyrrole natural product is described. With none of the chiral centers of heronapyrrole C originally assigned, we proposed the mos... Fluorescence-On Response via CB7 Binding to Viologen-Dye Pseudorotaxanes [作者：SINGH ANURADHA; YIP WAITAK; HALTERMAN RONALD L,期刊：Organic Letters, 页码：4046-4049 , 文章类型： Article，,卷期：2012年14-16] Fluorescence-on sensors typically rely on disrupting photoinduced electron transfer quenching of the excited state through binding the electron donor. To provide a more general fluorescence-on signaling unit, a quencher-... Azocalix[4]arene Strapped Calix[4]pyrrole: A Confirmable Fluoride Sensor [作者：THIAMPANYA PREECHA; MUANGSIN NONGNUJ; PULPOKA BUNCHA,期刊：Organic Letters, 页码：4050-4053 , 文章类型： Article，,卷期：2012年14-16] A new chromogenic fluoride sensor based on 1,3-di-p-nitrophenylazocalix[4]arene-calix[4]pyrrole (1) was designed and synthesized. The color of the solution of probe 1 changed upon the addition of any F-, CH3CO2-, PhCO2-,... FeCl3-Catalyzed Stereoselective Construction of Spirooxindole Tetrahydroquinolines via Tandem 1,5-Hydride Transfer/Ring Closure [作者：HAN YANYAN; HAN WENYONG; HOU XUE; ZHANG XIAOMEI; YUAN WEICHENG,期刊：Organic Letters, 页码：4054-4057 , 文章类型： Article，,卷期：2012年14-16] An efficient FeCl3-catalyzed stereoselective intramolecular tandem 1,5-hydride transfer/ring closure reaction was developed. The method allows for the formation of structurally diverse spirooxindole tetrahydroquinolines ... Iron-Catalyzed Unexpected Easy Access to Stereodefined Trimethylsilyl Vinyl Ketenes [作者：CHAI GUOBI; FU CHUNLING; MA SHENGMING,期刊：Organic Letters, 页码：4058-4061 , 文章类型： Article，,卷期：2012年14-16] Stereodefined trimethylsilyl vinyl ketenes with polysubstitution have been synthesized highly regio- and stereoselectively via an iron-catalyzed reaction of 2-trimethylsilyl-2,3-allenoates with Grignard reagents in good ... Synthesis, Physical Properties, and Field-Effect Mobility of Isomerically Pure syn-/anti-Anthradithiophene Derivatives [作者：MAMADA MASASHI; MINAMIKI TSUKURU; KATAGIRI HIROSHI; TOKITO SHIZUO,期刊：Organic Letters, 页码：4062-4065 , 文章类型： Article，,卷期：2012年14-16] Isomerically pure syn-/anti-isomers of 2,8-dimethylanthradithiophene (DMADT) were synthesized in five steps and characterized using thermogravimetry, X-ray single crystal analysis, UV-vis absorption, and electrochemical ... Cascade Carbopalladation Reaction between Alkynes and gem-Dibromoolefins: Facile Access to Monoannelated Pentalenes [作者：RIVERAFUENTES PABLO; REKOWSKI MARGARETE VON WANTOCH; SCHWEIZER W BERND; GISSELBRECHT JEANPAUL; BOUDON CORINNE; DIEDERICH FRANCOIS,期刊：Organic Letters, 页码：4066-4069 , 文章类型： Article，,卷期：2012年14-16] A carbopalladation cascade reaction of easily accessible gem-dibromoolefins and alkynes furnishes monobenzo- and mononaphthopentalenes. The new chromophores accessed by this short route exhibit small HOMO-LUMO gaps and r...