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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70条记录   Regioselective Catalytic Hydroboration of Propargylic Species Using Cu(I)-NHC Complexes [作者：PARK JIN KYOON; ONDRUSEK BRIAN A; MCQUADE D TYLER,期刊：Organic Letters, 页码：4790-4793 , 文章类型： Article，,卷期：2012年14-18] The catalytic regioselective hydroboration of propargylic alcohols and ethers was investigated using NHC-CuCl. We observe that different NHC-CuCl complexes catalyze hydroborations of propargylic substrates with opposite ... Cobalt(III) Porphyrin Catalyzed Aza-Diels-Alder Reaction [作者：WAKABAYASHI RYOTA; KURAHASHI TAKUYA; MATSUBARA SEIJIRO,期刊：Organic Letters, 页码：4794-4797 , 文章类型： Article，,卷期：2012年14-18] An efficient protocol for the aza-Diels-Alder reaction of electron-deficient 1,3-dienes with unactivated imines in the presence of a cationic cobalt(III) porphyrin complex was developed. The transformation proceeded smoo... Method for the Efficient Synthesis of Highly-Substituted Oxetan- and Azetidin-, Dihydrofuran- and Pyrrolidin-3-ones and Its Application to the Synthesis of (+/-)Pseudodeflectusin [作者：MAEGAWA TOMOHIRO; OTAKE KAZUKI; HIROSAWA KEIICHI; GOTO AKIHIRO; FUJIOKA HIROMICHI,期刊：Organic Letters, 页码：4798-4801 , 文章类型： Article，,卷期：2012年14-18] Highly substituted four- and five-membered heterocycles were prepared starting with O,P- and N,P-acetals by using a one-pot method involving base induced cyclization and a Horner-Wadsworth-Emmons (HWE) olefination reacti... An Efficient Synthesis of Bridged Heterocycles from an Ir(I) Bis-Amination/Ring-Closing Metathesis Sequence [作者：BRAWN RYAN A; GUIMARAES CRISTIANO R W; MCCLURE KIM F; LIRAS SPIROS,期刊：Organic Letters, 页码：4802-4805 , 文章类型： Article，,卷期：2012年14-18] The amination of bis-allylic imidates using an Iridium(I) catalyst leads to the efficient formation of 2,6-divinyl heterocycles. Careful screening of amines, solvents, and conditions has led to the discovery of a system ... Functionalized Chromans and Isochromans via a Diastereoselective Pd(0)-Catalyzedl Carboiodination [作者：PETRONE DAVID A; MALIK HASNAIN A; CLEMENCEAU ANTONIN; LAUTENS MARK,期刊：Organic Letters, 页码：4806-4809 , 文章类型： Article，,卷期：2012年14-18] A diastereoselective approach to isochromans and chromans via Pd(0)-catalyzed carboiodination is reported. The transformations using this methodology display excellent yields and diastereoselectivities as well as broad f... Synthesis of Enantiomerically Enriched 3-Amino-2-oxindoles through a Palladium-Mediated Asymmetric Intramolecular Arylation of alpha-Ketimino Amides [作者：TOLSTOY PAIVI; LEE SAMANTHA X Y; SPARR CHRISTOF; LEY STEVEN V,期刊：Organic Letters, 页码：4810-4813 , 文章类型： Article，,卷期：2012年14-18] A highly efficient and enantioselective synthesis of 3-amino-2-oxindoles through a palladium-catalyzed asymmetric intramolecular arylation of alpha-ketimino amides using (R)-DiFluorPhos as the coordinating ligand is repo... Palladium-Catalyzed Borylation of Aryl and Heteroaryl Halides Utilizing Tetrakis(dimethylamino)diboron: One Step Greener [作者：MOLANDER GARY A; TRICE SARAH L J; KENNEDY STEVEN M,期刊：Organic Letters, 页码：4814-4817 , 文章类型： Article，,卷期：2012年14-18] The palladium-catalyzed borylation of aryl and heteroaryl halides with a novel borylating agent, tetrakis(dimethylamino)diboron [(Me2N)(2)B-B(NMe2)(2)], is reported. The method is complementary to the previously reported... Iron-Catalyzed Cross-Coupling of N-Heterocyclic Chlorides and Bromides with Arylmagnesium Reagents [作者：KUZMINA OLESYA M; STEIB ANDREAS K; FLUBACHER DIETMAR; KNOCHEL PAUL,期刊：Organic Letters, 页码：4818-4821 , 文章类型： Article，,卷期：2012年14-18] A simple, practical iron salt catalyzed procedure allows fast cross-couplings of N-heterocyclic chlorides and bromides with various electron-rich and -poor arylmagnesium reagents. A solvent mixture of THF and tBuOMe is f... Core-Modified Naphthalenediimides Generate Persistent Radical Anion and Cation: New Panchromatic NIR Probes [作者：AJAYAKUMAR M R; ASTHANA DEEPAK; MUKHOPADHYAY PRITAM,期刊：Organic Letters, 页码：4822-4825 , 文章类型： Article，,卷期：2012年14-18] The generation of the first persistent radical cation of naphthalenediimide with Cu2+/Fe3+ under ambient conditions is reported. An alternate anionic trigger generates a persistent radical anion within the same motif. St... Novel Pillar[5]arene-Based Dynamic Polyrotaxanes Interlocked by the Quadruple Hydrogen Bonding Ureidopyrimidinone Motif [作者：HU XIAOYU; WU XUAN; DUAN QUNPENG; XIAO TANGXIN; LIN CHEN; WANG LEYONG,期刊：Organic Letters, 页码：4826-4829 , 文章类型： Article，,卷期：2012年14-18] Novel dynamic polyrotaxanes constructed from pillar[5]arenes as wheels and diamines as axles have been successfully synthesized in good yield using quadruple hydrogen bonding ureidopyrimidinone (UPy) motifs, which play a... Synthesis of Pyrrolo[2,3-b]indole via Iodine(III)-Mediated Intramolecular Annulation [作者：TU DANDAN; MA LIYING; TONG XIAOGANG; DENG XU; XIA CHENGFENG,期刊：Organic Letters, 页码：4830-4833 , 文章类型： Article，,卷期：2012年14-18] New synthetic procedures for the pyrrolo[2,3-b]indole skeleton have been developed via intramolecular annulation of indole derivatives under iodine(III). A series of indole derivatives with different protecting groups or... A Formal Enantioselective Total Synthesis of FR901483 [作者：HUO HAOHUA; ZHANG HONGKUI; XIA XIAOER; HUANG PEIQIANG,期刊：Organic Letters, 页码：4834-4837 , 文章类型： Article，,卷期：2012年14-18] A formal enantioselective total synthesis of the potent immunosuppressant FR901483 (1) has been accomplished. Our approach features the use of chiron 6 as the starting material, the application of the one-pot amide reduc... Palladium-Catalyzed Intramolecular C-H Arylation of Arenes Using Tosylates and Mesylates as Electrophiles [作者：NERVIG CHRISTINE S; WALLER PETER J; KALYANI DIPANNITA,期刊：Organic Letters, 页码：4838-4841 , 文章类型： Article，,卷期：2012年14-18] This paper describes a method for the palladium catalyzed intramolecular C-H arylation using tosylates and mesylates as electrophiles. The transformation is efficient for the synthesis of various heterocyclic motifs incl... Indium-Catalyzed Reductive Bromination of Carboxylic Acids Leading to Alkyl Bromides [作者：MORIYA TOSHIMITSU; YONEDA SHINICHIRO; KAWANA KEITA; IKEDA REIKO; KONAKAHARA TAKEO; SAKAI NORIO,期刊：Organic Letters, 页码：4842-4845 , 文章类型： Article，,卷期：2012年14-18] The combination of 1,1,3,3-tetramethyldisiloxane (TMDS) and trimethylbromosilane (Me3SiBr) with a catalytic amount of indium bromide (InBr3) undertook direct bromination of carboxylic acids, which produced the correspond... Spiro-fused Pyrrolidine, Piperidine, and Oxindole Scaffolds from Lactams [作者：HIRSCHHAEUSER CHRISTOPH; PARKER JEREMY S; PERRY MATTHEW W D; HADDOW MAIRI I F; GALLAGHER TIMOTHY,期刊：Organic Letters, 页码：4846-4849 , 文章类型： Article，,卷期：2012年14-18] Expedient routes to three classes of novel spiro-fused pyrrolidine, piperidine, and indoline heterocycle scaffolds are described. These three-dimensional frameworks, which conform to the "rule of three", are suitably pro... Synthesis of Fluorenone Derivatives through Pd-Catalyzed Dehydrogenative Cyclization [作者：LI HU; ZHU RUYI; SHI WENJUAN; HE KEHAN; SHI ZHANGJIE,期刊：Organic Letters, 页码：4850-4853 , 文章类型： Article，,卷期：2012年14-18] Palladium-catalyzed dual C-H functionalization of benzophenones to form fluorenones by oxidative dehydrogenative cyclization is reported. This method provides a concise and effective route toward the synthesis of fluoren...