个性化文献订阅>文章检索

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49条记录   Development of a Fluorescent Chemosensor for the Detection of Kynurenine [作者：KLOCKOW JESSICA L; GLASS TIMOTHY E,期刊：Organic Letters, 页码：235-237 , 文章类型： Article，,卷期：2013年15-2] Kynurenine, a metabolite of tryptophan, is known to contribute to cancer progression when overproduced. A method for facile fluorescent sensing of kynurenine using sensor 1 has been developed. When bound at low pH, senso... Pd(II)-Catalyzed Highly Regio- and Stereoselective Assembly of C-C Double Bonds: An Efficient Method for the Synthesis of 2,4-Dihalo-1,3,5-trienes from Alkynols [作者：JIANG HUANFENG; GAO YANG; WU WANQING; HUANG YUBING,期刊：Organic Letters, 页码：238-241 , 文章类型： Article，,卷期：2013年15-2] A highly efficient method for the synthesis of 2,4-dihalo-1,3,5-trienes from alkynols was developed. This chemistry allows access to multiple conjugated double bonds in a single step with high stereoselectivity. Total Synthesis of Sedum Alkaloids via Catalyst Controlled aza-Cope Rearrangement and Hydroformylation with Formaldehyde [作者：REN HONG; WULFF WILLIAM D,期刊：Organic Letters, 页码：242-245 , 文章类型： Article，,卷期：2013年15-2] The catalytic asymmetric aminoallylation of chiral aldehydes is developed as a new method for the catalyst controlled synthesis of syn- and anti-1,3-aminoalcohols. This methodology is highlighted in the synthesis of the ... Wang Linker Free of Side Reactions [作者：CASTRO VIDA; RODRIGUEZ HORTENSIA; ALBERICIO FERNANDO,期刊：Organic Letters, 页码：246-249 , 文章类型： Article，,卷期：2013年15-2] A new resin for the solid-phase synthesis of peptide acids was developed. It was based on a linker with two unique features: methoxy groups as the only activating groups of the phenyl ring and a copper(I)-catalyzed Click... Synthesis of Chiral beta-lodo- and Vinylorganophosphorus(V) Compounds by Fragmentation of Carbohydrate Anomeric Alkoxyl Radicals [作者：HERNANDEZGUERRA DANIEL; RODRIGUEZ MARIA S; SUAREZ ERNESTO,期刊：Organic Letters, 页码：250-253 , 文章类型： Article，,卷期：2013年15-2] A new general methodology for the synthesis of chiral vinylphosphonate and vinylphosphine oxide carbohydrate derivatives has been developed using the anomeric alkoxyl radical fragmentation reaction as the key step. The s... Turn-on Fluorescent Chemosensor Based on an Amino Acid for Pb(II) and Hg(II) Ions in Aqueous Solutions and Role of Tryptophan for Sensing [作者：NEUPANE LOK NATH; PARK JOOYOUNG; PARK JU HUN; LEE KEUNHYEUNG,期刊：Organic Letters, 页码：254-257 , 文章类型： Article，,卷期：2013年15-2] This communication presents a fluorescent chemosensor for detecting Pb(II) and Hg(II) in aqueous solutions. The sensor showed a turn-on response to Pb(II) by an enhancement of emission intensity at 380 nm and to Hg(II) b... Direct Imine Acylation: Rapid Access to Diverse Heterocyclic Scaffolds [作者：UNSWORTH WILLIAM P; KITSIOU CHRISTIANA; TAYLOR RICHARD J K,期刊：Organic Letters, 页码：258-261 , 文章类型： Article，,卷期：2013年15-2] A simple and efficient procedure to prepare a range of diverse heterocycles by the direct acylation of imines using a variety of functionalized benzoic acids is described. The methodology features a novel method for N-ac... Direct Imine Acylation: Synthesis of the Proposed Structures of 'Upenamide [作者：UNSWORTH WILLIAM P; GALLAGHER KATHERINE A; JEAN MICKAEL; SCHMIDT JAN PETER; DIORAZIO LOUIS J; TAYLOR RICHARD J K,期刊：Organic Letters, 页码：262-265 , 文章类型： Article，,卷期：2013年15-2] The synthesis of the two proposed structures of macrocyclic marine natural product 'upenamide is reported. The key step utilizes direct imine acylation (DIA) with a protected beta-hydroxy acid to construct the key tricyc... Selective Alkylation of Amines with Alcohols by Cp-star-Iridium(III) Half-Sandwich Complexes [作者：WETZEL ALEXANDER; WOECKEL SIMONE; SCHELWIES MATHIAS; BRINKS MARION K; ROMINGER FRANK; HOFMANN PETER; LIMBACH MICHAEL,期刊：Organic Letters, 页码：266-269 , 文章类型： Article，,卷期：2013年15-2] [(CpIr)-Ir-star(Pro)Cl] (Pro = prolinato) was identified among a series of Cp-star-iridium half-sandwich complexes as a highly reactive and selective catalyst for the alkylation of amines with alcohols. It is active unde... Palladium-Catalyzed ortho-CH-Bond Oxygenation of Aromatic Ketones [作者：CHOY PUI YING; KWONG FUK YEE,期刊：Organic Letters, 页码：270-273 , 文章类型： Article，,卷期：2013年15-2] A palladium-catalyzed C-(sp2)-H bond oxygenation reaction is described. This protocol represents the first example of a C-H bond cleavage/C-O bond formation sequence, by employing a ketone moiety as the directing group. ... Unprecedented Diterpenoids as a PTP1B Inhibitor from the Hainan Soft Coral Sarcophyton trocheliophorum Marenzeller [作者：LIANG LINFU; KURTAN TIBOR; MANDI ATTILA; YAO LIGONG; LI JIA; ZHANG WEN; GUO YUEWEI,期刊：Organic Letters, 页码：274-277 , 文章类型： Article，,卷期：2013年15-2] Methyl sarcotroates A and B (3 and 4), two unprecedented diterpenoids possessing a tetradecahydrocyclopenta[3',4']cyclobuta[1',2':4,5]-cyclonona[1,2-b]oxirene ring system, along with their probable biogenetic precursor, ... Copper-Catalyzed Direct Arylation of Cyclic Enamides Using Diaryliodonium Salts [作者：GIGANT NICOLAS; CHAUSSETBOISSARIEI LAETITIA; BELHOMME MARIECHARLOTTE; POISSON THOMAS; PANNECOUCKE XAVIER; GILLAIZEU ISABELLE,期刊：Organic Letters, 页码：278-281 , 文章类型： Article，,卷期：2013年15-2] A convenient method for the copper(II)-catalyzed direct arylation of cyclic and nonaromatic enamides using diaryliodonium salts has been developed. The reaction demonstrates large functional group tolerance, good yields,... Catalytic C-H and C-S Bond Activation of Thiophenes [作者：LI JING; HUANG HUANAN; LIANG WEIHONG; GAO QUN; DUAN ZHENG,期刊：Organic Letters, 页码：282-285 , 文章类型： Article，,卷期：2013年15-2] A new Pd-catalyzed reaction of thiophenes with alkynes via C-H and C-S bond activation has been developed. This provides a new approach to prepare sulfur-containing compounds. An interesting salt effect was observed, and... Asymmetric Conjugate Addition of Grignard Reagents to Pyranones [作者：MAO BIN; FANANASMASTRAL MARTIN; FERINGA BEN L,期刊：Organic Letters, 页码：286-289 , 文章类型： Article，,卷期：2013年15-2] An efficient enantioselective synthesis of lactones was developed based on the catalytic asymmetric conjugate addition (ACA) of alkyl Grignard reagents to pyranones. The use of 2H-pyran-2-one for the first time in the AC... Chemoselective Allene Aziridination via Ag(I) Catalysis [作者：RIGOLI JARED W; WEATHERLY CALE D; VO BRIAN T; NEALE SAMUEL; MEIS ALAN R; SCHOMAKER JENNIFER M,期刊：Organic Letters, 页码：290-293 , 文章类型： Article，,卷期：2013年15-2] Allene aziridination generates useful bicyclic methylene aziridine scaffolds that can be flexibly transformed into a range of stereochemically complex and densely functionalized amine-containing stereotriads. The scope o... A Novel Sperm-Activating and Attracting Factor from the Ascidian Ascidia sydneiensis [作者：MATSUMORI NOBUAKI; HIRADATE YUKI; SHIBATA HAJIME; OISHI TOHRU; SHIMMA SHUICHI; TOYODA MICHISATO; HAYASHI FUMIAKI; YOSHIDA MANABU; MURATA MICHIO; MORISAWA MASAAKI,期刊：Organic Letters, 页码：294-297 , 文章类型： Article，,卷期：2013年15-2] A novel SAAF was isolated from the title ascidian. The structure was elucidated using the entire sample of 4 nmol, suggesting that the position of the OH group confers genus-specificity to sperm chemotaxis in ascidians. ...