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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96条记录   Organocatalytic Synthesis of Multiple Substituted Bicyclo[4.4.0]Decalin System [作者：ANWAR SHEIK; CHANG HUIJU; CHEN KWUNMIN,期刊：Organic Letters, 页码：2200-2203 , 文章类型： Article，,卷期：2011年13-9] An efficient and unprecedented organocatalytic reaction of gamma-nitroketones with alpha,beta-unsaturated aldehydes to give polyfunctionalized [4.4.0] bicyclic skeletons was developed. The diphenylprolinol silyl ether me... Toward the Racemic Total Synthesis of Hederacines A and B: Construction of an Advanced Tricyclic Intermediate [作者：YAMASHITA MIHO; YAMASHITA TETSUYA; AOYAGI SAKAE,期刊：Organic Letters, 页码：2204-2207 , 文章类型： Article，,卷期：2011年13-9] Progress toward the total synthesis of hederacines A and B is described. Our approach involves an allylic cyanate-to-isocyanate rearrangement, eneyne ring-closing metathesis, and a transannular reaction between the C-5 a... Iron-Catalyzed Stereospecific Olefin Synthesis by Direct Coupling of Alcohols and Alkenes with Alcohols [作者：LIU ZHONGQUAN; ZHANG YUEXIA; ZHAO LIXING; LI ZEJIANG; WANG JIANTAO; LI HUAJIE; WU LONGMIN,期刊：Organic Letters, 页码：2208-2211 , 文章类型： Article，,卷期：2011年13-9] An efficient Fe(III)-catalyzed direct coupling of alkenes with alcohols and cross-coupling of alcohols with alcohols to give the corresponding substituted (E)-alkenes stereospecifically is demonstrated. Additionally, thi... Characterization of TrdL as a 10-Hydroxy Dehydrogenase and Generation of New Analogues from a Tirandamycin Biosynthetic Pathway [作者：MO XUHUA; HUANG HONGBO; MA JUNYING; WANG ZHONGWEN; WANG BO; ZHANG SI; ZHANG CHANGSHENG; JU JIANHUA,期刊：Organic Letters, 页码：2212-2215 , 文章类型： Article，,卷期：2011年13-9] TrdL, encoding a flavin-dependent oxidoreductase in the tirandamycin gene cluster, was inactivated to afford a Delta trdL mutant, the fermentation of which yielded a new intermediate, tirandamycin E (5), and an additiona... A New Spirobifluorene-Bridged Bipolar System for a Nitric Oxide Turn-On Fluorescent Probe [作者：LIN LIYEN; LIN XIAUOYUN; LIN FRANCIS; WONG KENTSUNG,期刊：Organic Letters, 页码：2216-2219 , 文章类型： Article，,卷期：2011年13-9] A new spirobifluorene-bridged bipolar molecule (EDADO) as a nitric oxide (NO) turn-on fluorescent probe was designed and synthesized. The fluorescence of EDADO is strongly quenched by photoinduced electron transfer (PET)... Iodobenzene-Catalyzed Intramolecular Oxidative Cyclization Reactions of delta-Alkynyl beta-Ketoesters [作者：RODRIGUEZ ARANTXA; MORAN WESLEY J,期刊：Organic Letters, 页码：2220-2223 , 文章类型： Article，,卷期：2011年13-9] Iodobenzene is shown to catalyze the 5-exo-dig cyclization of delta-alkynyl beta-ketoesters under oxidative conditions that generate hypervalent iodine species in situ. The cyclopentane products contain adjacent quaterna... Synthesis of Spirotetramates via a Diels-Alder Approach [作者：BUTT NICHOLAS A; MOODY CHRISTOPHER J,期刊：Organic Letters, 页码：2224-2227 , 文章类型： Article，,卷期：2011年13-9] A study toward the unusual spirotetramate core of the pyrroindomycin antibiotics employing an intermolecular Diets Alder reaction of an exo-methylene tetramic acid dienophile is described. The exp-methylene tetramate is ... NHC-Catalyzed Oxidative Cyclization Reactions of 2-Alkynylbenzaldehydes under Aerobic Conditions: Synthesis of O-Heterocycles [作者：PARK JONG HYUB; BHILARE SACHIN V; YOUN SO WON,期刊：Organic Letters, 页码：2228-2231 , 文章类型： Article，,卷期：2011年13-9] An NHC-catalyzed, regio- and stereoselective oxidative cyclization of o-alkynylbenzaldehydes bearing an unactivated alkyne moiety as an internal electrophile as been developed to afford phthalides and isocoumarins. A sin... "Greener" Friedel-Crafts Acylations: A Metal- and Halogen-Free Methodology [作者：WILKINSON MARK C,期刊：Organic Letters, 页码：2232-2235 , 文章类型： Article，,卷期：2011年13-9] The utility of methanesulfonic anhydride for promoting the Friedel-Crafts acylation reaction of aryl and alkyl carboxylic acids is disclosed. This reagent allows the preparation of aryl ketones in good yield with minimal... Radical Alkylphosphanylation of Olefins with Stannylated or Silylated Phosphanes and Alkyl Iodides [作者：LAMAS MARIECELINE; STUDER ARMIDO,期刊：Organic Letters, 页码：2236-2239 , 文章类型： Article，,卷期：2011年13-9] Intermolecular conjugate radical addition reactions of secondary and tertiary alkyl radicals derived from the corresponding alkyl iodides to activated olefins such as alpha,beta-unsaturated esters, amides, imides, nitril... 1,8-Pyrenylene-Ethynylene Macrocycles [作者：VENKATARAMANA GANDIKOTA; DONGARE PRATEEK; DAWE LOUISE N; THOMPSON DAVID W; ZHAO YUMING; BODWELL GRAHAM J,期刊：Organic Letters, 页码：2240-2243 , 文章类型： Article，,卷期：2011年13-9] A concise, highly regioselective synthesis of 1,8-dibromo-4,5-dialkoxypyrenes has been developed and exploited in the synthesis of some 1,8-pyrenylene- ethynylene macrocycles. The H-1 NMR data and NICS calculations indic... Iodo-Carbocyclization of Electron-Deficient Alkenes: Synthesis of Oxindoles and Spirooxindoles [作者：WEI HAILONG; PIOU TIFFANY; DUFOUR JEREMY; NEUVILLE LUC; ZHU JIEPING,期刊：Organic Letters, 页码：2244-2247 , 文章类型： Article，,卷期：2011年13-9] Cyclisative carbo-iodination of N-alkyl-N-arylacrylamide derivatives (3) in the presence of PhI(OAc)(2)/I-2 afforded functionalized 3-(iodomethyl)-3-substituted-indolin-2-ones (4) in good to excellent yields. With a suit... Three-Component and Nonclassical Reaction of Phosphines with Enynes and Aldehydes: Formation of gamma-Lactones Featuring alpha-Phosphorus Ylides [作者：DENG JIECHENG; CHUANG SHIHCHING,期刊：Organic Letters, 页码：2248-2251 , 文章类型： Article，,卷期：2011年13-9] Inverted carbenoid species, generated from attack of phosphines at the alpha(delta')-carbon of hex-2-en-4-ynedioic acid dialkyl esters, react with aldehydes to give gamma-lactones possessing an alpha-phosphorus ylide moi... Na+ Triggered Fluorescence Sensors for Mg2+ Detection Based on a Coumarin Salen Moiety [作者：DONG YU; LI JUNFENG; JIANG XIAOXIANG; SONG FENGYAN; CHENG YIXIANG; ZHU CHENGJIAN,期刊：Organic Letters, 页码：2252-2255 , 文章类型： Article，,卷期：2011年13-9] Two coumarin salen-based sensors CS1 and CS2 can exhibit a pronounced fluorescence enhancement response toward Mg2+ as high as 36-fold (CS1) and 111-fold (CS2) in the presence of Na+ as a synergic trigger. More important... Facile Amide Bond Formation from Carboxylic Acids and Isocyanates [作者：SASAKI KANAME; CRICH DAVID,期刊：Organic Letters, 页码：2256-2259 , 文章类型： Article，,卷期：2011年13-9] A wide variety of carboxylic acids in the form of their salts condense with aryl isocyanates at room temperature with loss of carbon dioxide to give the corresponding amides in high yield. Application of the reaction to ... Resorcinol-Templated Synthesis of a Cofacial Terpyridine in Crystalline pi-Stacked Columns [作者：DUTTA SAIKAT; BUCAR DEJANKRESIMIR; MACGILLIVRAY LEONARD R,期刊：Organic Letters, 页码：2260-2262 , 文章类型： Article，,卷期：2011年13-9] A resorcinol achieves a templated stereospecific and near-quantitative synthesis of a cofacial terpyridine in the solid state. The solid-state synthesis occurs in one-dimensional pi-stacked columns with reactivities high...