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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64条记录   [Pd(mu-Br)((PBu3)-Bu-t)](2) as a Highly Active Isomerization Catalyst: Synthesis of Enol Esters from Allylic Esters [作者：MAMONE PATRIZIA; GRUENBERG MATTHIAS F; FROMM ANDREAS; KHAN BILAL A; GOOSSEN LUKAS J,期刊：Organic Letters, 页码：3716-3719 , 文章类型： Article，,卷期：2012年14-14] The dimeric Pd(I)-complex [Pd(mu-Br)((PBu3)-Bu-t)](2) was found to be highly active for catalyzing double-bond migration in various substrates such as unsaturated ethers, alcohols, amides, and arenes, under mild conditio... Formal Synthesis of Merrilactone A Using a Domino Cyanide 1,4-Addition-Aldol Cyclization [作者：NAZEF NAIM; DAVIES ROBERT D M; GREANEY MICHAEL F,期刊：Organic Letters, 页码：3720-3723 , 文章类型： Article，,卷期：2012年14-14] A formal synthesis of merrilactone A has been completed using a domino 1,4-addition-aldol process as the key step. Both iodo- and cyano-1, 4-addition-aldol cyclizations were productive in forming the highly hindered C1-C... Pd(II)-Catalyzed Primary-C(sp(3))-H Acyloxylation at Room Temperature [作者：RIT RAJA K; YADAV M RAMU; SAHOO AKHILA K,期刊：Organic Letters, 页码：3724-3727 , 文章类型： Article，,卷期：2012年14-14] With the aid of a novel S-methyl-S-2-pyridyl-sulfoximine (MPyS) directing group (DG), the unactivated primary beta-C(sp(3))-H bond of MPyS-N-amides oxidizes at room temperature. The catalytic conditions are applicable to... Predominance of the Participation of the Geminal over Vicinal Bonds: Torquoselectivity of Retro-Nazarov Reactions [作者：NARUSE YUJI; ICHIHASHI YU; SHIMIZU TAKASHI; INAGAKI SATOSHI,期刊：Organic Letters, 页码：3728-3731 , 文章类型： Article，,卷期：2012年14-14] Torquoselectivities of electrocyclic ring-opening reactions have been proposed to be controlled by the participation of electron-donating sigma-bonds (sigma-EDB) geminal to the breaking sigma-bond and/or vicinal electron... One-Pot, Two-Step Cascade Synthesis of Quinazolinotriazolobenzodiazepines [作者：GUGGENHEIM KATHRYN G; TORU HANNAH; KURTH MARK J,期刊：Organic Letters, 页码：3732-3735 , 文章类型： Article，,卷期：2012年14-14] An operationally simple, one-pot, two-step cascade method has been developed to afford quinazolino[1,2,3]triazolo[1,4]benzodiazepines. This unique, atom-economical transformation engages five reactive centers (amide, ani... Formal Synthesis of 7-Methoxymitosene and Synthesis of its Analog via a Key PtCl2-Catalyzed Cycloisomerization [作者：LIU LIANZHU; WANG YANZHAO; ZHANG LIMING,期刊：Organic Letters, 页码：3736-3739 , 文章类型： Article，,卷期：2012年14-14] A formal synthesis of 7-methoxymitosene is achieved via a key platinum-catalyzed cycloisomerization. The precursor for the Pt catalysis, a fully functionalized benzene intermediate, was prepared via a regioselective elec... Enantio- and Diastereoselective Synthesis of Substituted Tetrahydro-1H-isochromanes through a Dynamic Kinetic Resolution Proceeding under Dienamine Catalysis [作者：ORUE ANE; REYES EFRAIM; VICARIO JOSE L; CARRILLO LUISA; URIA UXUE,期刊：Organic Letters, 页码：3740-3743 , 文章类型： Article，,卷期：2012年14-14] Racemic 5-acyloxydihydropyranones react with enolizable alpha,beta-unsaturated aldehydes in the presence of a chiral secondary amine catalyst furnishing a wide range of differently substituted tetrahydro-1H-isochromanes ... Ni-Catalyzed Alkenylation of Triazolopyridines: Synthesis of 2,6-Disubstituted Pyridines [作者：LIU SHENG; SAWICKI JAMES; DRIVER TOM G,期刊：Organic Letters, 页码：3744-3747 , 文章类型： Article，,卷期：2012年14-14] A synthetic strategy to access 2,6-disubstituted pyridines from triazolopyridines through a regioselective nickel-catalyzed alkenylation reaction of the C7-H bond is described. The N-2 fragment embedded in the resulting ... An Indium-Mediated Allylative/Transesterification DFT-Directed Approach to Chiral C-(3)-Functionalized Phthalides [作者：MIRABDOLBAGHI ROYA; DUDDING TRAVIS,期刊：Organic Letters, 页码：3748-3751 , 文章类型： Article，,卷期：2012年14-14] A one-pot synthesis of chiral C-(3)-substituted phthalides via an indium-mediated allylation/transesterification reaction is described. The development of this reaction was facilitated through the applied use of DFT calc... A Ring-Closing Metathesis-Based Approach to the Synthesis of (+/-)-Tetrabenazine [作者：JOHANNES MANUEL; ALTMANN KARLHEINZ,期刊：Organic Letters, 页码：3752-3755 , 文章类型： Article，,卷期：2012年14-14] A modular stereoselective synthesis of the vesicular monoamine transport inhibitors (+)-tetrabenazine ((+)-1) and (+)-alpha-dihydrotetrabenazine ((+)-2) has been developed. The approach is based on amine 4 and acid 5 as ... Synthesis of Functionalized Cyclohexenone Core of Welwitindolinones via Rhodium-Catalyzed [5+1] Cycloaddition [作者：ZHANG MIN; TANG WEIPING,期刊：Organic Letters, 页码：3756-3759 , 文章类型： Article，,卷期：2012年14-14] The cyclohexenone core of welwitindolinones was synthesized by a Rh(I)-catalyzed [5 + 1]-cycloaddition of an allenylcyclopropane with CO. A pentasubstituted cyclopropane was prepared successfully by a Rh(II)-catalyzed in... Spirocyclization by Palladium-Catalyzed Domino Heck-Direct C-H Arylation Reactions: Synthesis of Spirodihydroquinolin-2-ones [作者：PIOU TIFFANY; NEUVILLE LUC; ZHU JIEPING,期刊：Organic Letters, 页码：3760-3763 , 文章类型： Article，,卷期：2012年14-14] Treatment of a DMA solution of anilide 1 with a catalytic amount of palladium acetate (0.025 equiv) and XPhos (0.05 equiv) in the presence of potassium carbonate (2.0 equiv) at 100 degrees C afforded dihydroquinolin-2-on... Asymmetric Construction of Functionalized Bicyclic Imides via [3+2] Annulation of MBH Carbonates Catalyzed by Dipeptide-Based Phosphines [作者：ZHONG FANGRUI; CHEN GUOYING; HAN XIAOYU; YAO WEIJUN; LU YIXIN,期刊：Organic Letters, 页码：3764-3767 , 文章类型： Article，,卷期：2012年14-14] A highly enantioselective [3 + 2] annulation of MBH carbonates and maleimides catalyzed by chiral phosphines has been developed. In the presence of 5 mol % of L-Thr-L-Val-derived phosphine 6, functionalized bicyclic imid... A Novel Strategy for the Synthesis of 3-(N-Heteryl)pyrrole Derivatives [作者：KHLEBNIKOV ALEXANDER F; GOLOVKINA MARIA V; NOVIKOV MIKHAIL S; YUFIT DMITRY S,期刊：Organic Letters, 页码：3768-3771 , 文章类型： Article，,卷期：2012年14-14] A flexible approach to unknown 1-(1H-pyrrol-3-yl)pyridinium salts with selective control of the substitution patterns, by the reaction of pyridinium ylides with 2H-azirines, is disclosed. 3-(Pyridinium-1-yl)pyrrolides, a... Palladium(0)-Catalyzed Dearomative Arylation of Indoles: Convenient Access to Spiroindolenine Derivatives [作者：WU KEJIA; DAI LIXIN; YOU SHULI,期刊：Organic Letters, 页码：3772-3775 , 文章类型： Article，,卷期：2012年14-14] Dearomatization of an indole via palladium(0)-catalyzed cross-coupling reaction has been realized. With readily available triphenylphosphine as ligand, various spiroindolenine derivatives have been obtained in good to ex... Automated Solid-Phase Synthesis of Hyaluronan Oligosaccharides [作者：WALVOORT MARTHE T C; VOLBEDA ANNE GEERT; REINTJENS NIELS R M; VAN DEN ELST HANS; PLANTE OBADIAH J; OVERKLEEFT HERMAN S; VAN DER MAREL GIJSBERT A; CODEE JEROEN D C,期刊：Organic Letters, 页码：3776-3779 , 文章类型： Article，,卷期：2012年14-14] Well-defined fragments of hyaluronic acid (HA) have been obtained through a fully automated solid-phase oligosaccharide synthesis. Disaccharide building blocks, featuring a disarmed glucuronic acid donor moiety and a di-...