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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80条记录   Room Temperature, Metal-Free Synthesis of Diaryl Ethers with Use of Diaryliodonium Salts [作者：JALALIAN NAZLI; ISHIKAWA ELOISA E; SILVA LUIZ F JR; OLOFSSON BERIT,期刊：Organic Letters, 页码：1552-1555 , 文章类型： Article，,卷期：2011年13-6] A fast, high-yielding synthesis of diaryl ethers with use of mild and metal-free conditions has been developed. The scope includes bulky ortho-substituted diaryl ethers, which are difficult to obtain by metal-catalyzed p... Quinoline-Annulated Porphyrins [作者：AKHIGBE JOSHUA; ZELLER MATTHIAS; BRUECKNER CHRISTIAN,期刊：Organic Letters, 页码：1322-1325 , 文章类型： Article，,卷期：2011年13-6] Porphyrin-2,3-dione mono- and dioximes were used as starting materials for the efficient syntheses of mono- and bis-quinoline-annulated porphyrins and their corresponding N-oxides. Owing to an extended pi-system, these n... A Triangular Macrocycle Altering Planar and Bulky Sections in Its Molecular Backbone [作者：KALETA JIRI; MAZAL CTIBOR,期刊：Organic Letters, 页码：1326-1329 , 文章类型： Article，,卷期：2011年13-6] A triangular macrocyclic molecule has been synthesized which consists of substituted phenanthrene vertices interconnected by 1,3-diethynylbicyclo[1.1.1]pentane sides. The molecule is the very first example of exploiting ... Chirality Transfer in Au-Catalyzed Cyclization Reactions of Monoallylic Diols: Selective Access to Specific Enantiomers Based on Olefin Geometry [作者：APONICK AARON; BIANNIC BERENGER,期刊：Organic Letters, 页码：1330-1333 , 文章类型： Article，,卷期：2011年13-6] The gold(I)-catalyzed cyclization of monoallylic diols to form tetrahydropyrans is shown to be highly stereoselective when chiral allylic alcohols are employed. Substrates that differ only in olefin geometry provide enan... Gold(I)-Catalyzed Intramolecular Amination of Allylic Alcohols With Alkylamines [作者：MUKHERJEE PARAMITA; WIDENHOEFER ROSS A,期刊：Organic Letters, 页码：1334-1337 , 文章类型： Article，,卷期：2011年13-6] A 1:1 mixture of (1)AuCl [1 = P(t-Bu)(2)o-biphenyl] and AgSbF6 catalyzes the intramolecular amination of allylic alcohols with alkylamines to form substituted pyrrolidine and piperidine derivatives. Gold(I)-catalyzed cyc... Dynamic Kinetic Asymmetric Synthesis of Five Contiguous Stereogenic Centers by Sequential Organocatalytic Stetter and Michael-Aldol Reaction: Enantioselective Synthesis of Fully Substituted Cyclopentanols Bearing a Quaternary Stereocenter [作者：HONG BORCHERNG; DANGE NITIN S; HSU CHESHENG; LIAO JUHSIOU; LEE GENEHSIANG,期刊：Organic Letters, 页码：1338-1341 , 文章类型： Article，,卷期：2011年13-6] A synthesis of fully substituted cyclopentanes bearing a quaternary carbon center and five contiguous stereogenic centers has been achieved by sequential organocatalyzed Stetter and Michael Aldol reactions of heteroaroma... Palladium-Catalyzed Oxidative C-H Bond and C=C Double Bond Cleavage: C-3 Acylation of Indolizines with alpha,beta-Unsaturated Carboxylic Acids [作者：YANG YUZHU; CHEN LI; ZHANG ZHAOGUO; ZHANG YUHONG,期刊：Organic Letters, 页码：1342-1345 , 文章类型： Article，,卷期：2011年13-6] A novel palladium-catalyzed C-3 acylation of indolizines with alpha,beta-unsaturated carboxylic acids via C-H bond and C=C double bond cleavage under oxidative conditions is described. The regioselectivity is assisted by... Gold-Catalyzed Synthesis of Benzil Derivatives and alpha-Keto Imides via Oxidation of Alkynes [作者：XU CHENGFU; XU MEI; JIA YIXIA; LI CHUANYING,期刊：Organic Letters, 页码：1556-1559 , 文章类型： Article，,卷期：2011年13-6] An efficient process based on the gold-catalyzed redox reaction has been developed to oxidize 1,2-diarylacetylene or ynamide to 1,2diaryldiketone or a-keto imide respectively. This process can tolerate a variety of funct... Synthesis of Thiazolidine Thioester Peptides and Acceleration of Native Chemical Ligation [作者：DHEUR JULIEN; OLLIVIER NATHALIE; MELNYK OLEG,期刊：Organic Letters, 页码：1560-1563 , 文章类型： Article，,卷期：2011年13-6] Thiazolidine thioester peptides were synthesized by reacting bis(2-sulfanylethyl)amido peptides with glyoxylic acid at pH 1. A significant increase in Native Chemical Ligation (NCL) rate was observed with thiazolidine th... Henrischinins A-C: Three New Triterpenoids from Schisandra henryi [作者：XUE YONGBO; YANG JIANHONG; LI XIAONIAN; DU XUE; PU JIANXIN; XIAO WEILIE; SU JIA; ZHAO WEI; LI YAN; SUN HANDONG,期刊：Organic Letters, 页码：1564-1567 , 文章类型： Article，,卷期：2011年13-6] Three novel triterpenoids, henrischinins A-C (1-3), featuring the unique motif of a 3-one-2-oxabicyclo[3.2.1]-octane, were isolated from the leaves and stems of Schisandra henryi. Their structures were elucidated by spec... Stereoselective Synthesis of Both Stereoisomers of beta-Fluorostyrene Derivatives from a Common Intermediate [作者：LANDELLE GREGORY; TURCOTTESAVARD MARCOLIVIER; ANGERS LAETITIA; PAQUIN JEANFRANCOIS,期刊：Organic Letters, 页码：1568-1571 , 文章类型： Article，,卷期：2011年13-6] The stereoselective synthesis of both cis- and trans-beta-fluorostyrene derivatives from a common intermediate, (Z)-1-aryl-2-fluoro-1-(trimethylsilyl)ethenes, Is described. The trans isomers are obtained by a stereospeci... Generation of Medium-Ring Cycloalkynes by Ring Expansion of Vinylogous Acyl Triflates [作者：TUMMATORN JUMREANG; DUDLEY GREGORY B,期刊：Organic Letters, 页码：1572-1575 , 文章类型： Article，,卷期：2011年13-6] Reductive cyclization of aryl and vinyl iodides tethered to vinylogous acyl trifiates (VATS) induces a ring-expanding fragmentation to provide cyclic alkynyl ketones, including strained nine-membered cycloalkynes, in fai... Catalytic Enantioselective Synthesis of Chiral gamma-Butyrolactones [作者：YANAGISAWA AKIRA; KUSHIHARA NAOYUKI; YOSHIDA KAZUHIRO,期刊：Organic Letters, 页码：1576-1578 , 文章类型： Article，,卷期：2011年13-6] A tandem catalytic asymmetric aldol reaction/cyclization of beta,gamma-didehydro-gamma-lactones with aldehydes was achieved using chiral tin dibromide as a chiral precatalyst and sodium alkoxide as a base precatalyst. Op... ESIPT-Mediated Photocycloadditions of 3-Hydroxyquinolinones: Development of a Fluorescence Quenching Assay for Reaction Screening [作者：XIA BING; GERARD BAUDOUIN; SOLANO DANIELLE M; WAN JIANDI; JONES GUILFORD II; PORCO JOHN A JR,期刊：Organic Letters, 页码：1346-1349 , 文章类型： Article，,卷期：2011年13-6] Irradiation of 1,2-dimethyl-3-hydroxyquinolinone (DMQ) leads to excited state intramolecular proton transfer (ESIPT) generating a 3-oxidoquinolinium species which undergoes [3 + 2] photocycloaddition with dipolarophiles.... Palladium-Catalyzed Intramolecular Trapping of the Blaise Reaction Intermediate for Tandem One-Pot Synthesis of Indole Derivatives [作者：KIM JU HYUN; LEE SANGGI,期刊：Organic Letters, 页码：1350-1353 , 文章类型： Article，,卷期：2011年13-6] Palladium-catalyzed intramolecular N-arylative and N-alkylative/N-arylative trappings of the Blaise reaction intermediates could be a new route to construct the indole moiety in a tandem one-pot manner from nitriles. Phyteumosides A and B: New Saponins with Unique Triterpenoid Aglycons from Phyteuma orbiculare L. [作者：ABBET CHRISTIAN; NEUBURGER MARKUS; WAGNER TRIXIE; OUITSCHAU MELANIE; HAMBURGER MATTHIAS; POTTERAT OLIVIER,期刊：Organic Letters, 页码：1354-1357 , 文章类型： Article，,卷期：2011年13-6] Phyteumosides A (1) and B (2), two saponins with unprecedented triterpenoid aglycons, were isolated from the aerial parts of Phyteuma orbiculare (Campanulaceae). Their structures were elucidated by spectroscopic and chem...