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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61条记录   A Non-Photochemical Approach to the Bicyclo[3.2.0]heptane Core of Bielschowskysin [作者：FARCET JEANBAPTISTE; HIMMELBAUER MARTIN; MULZER JOHANN,期刊：Organic Letters, 页码：2195-2197 , 文章类型： Article，,卷期：2012年14-9] An asymmetric synthesis of the tricyclic core (-)-1 of the marine diterpene bielschowskysin is described. In particular, a methodology was developed to introduce the crucial quaternary center at C-12. Polyphosphoric Acid Promoted Synthesis of 10,11-Dihydrobenzo[j]fluoranthen-12-one [作者：CHANG MENGYANG; LEE TEINWEI; WU MINGHAO,期刊：Organic Letters, 页码：2198-2201 , 文章类型： Article，,卷期：2012年14-9] A straightforward synthesis of 3,8-dimethoxy-10,11-dihydrobenzo[j]fluoranthen-12-ones 1 Is reported In a seven-step route from blpheny1-4,4'-diol 2 via the transformation of a double Clalsen rearrangement, cross metathes... Nucleophilic Addition of beta-Amino Carbanions to Arynes: One-Pot Synthesis of 4-Aryl-N-methyl-1,2,3,4-tetrahydroisoquinolines [作者：SINGH KEMAL NAIN; SINGH PARAMJIT; SINGH PUSHPINDER; DEOL YADWINDER SINGH,期刊：Organic Letters, 页码：2202-2205 , 文章类型： Article，,卷期：2012年14-9] A novel approach for the direct C-4 arylation of N-methyl-1,2,3,4-tetrahydroisoquinolines by nucleophilic addition of beta-aminocarbanions to benzynes is described which provides a one-pot procedure for synthesis of the ... Iron-Promoted Tandem Reaction of Anilines with Styrene Oxides via C-C Cleavage for the Synthesis of Quinolines [作者：ZHANG YICHENG; WANG MIN; LI PINHUA; WANG LEI,期刊：Organic Letters, 页码：2206-2209 , 文章类型： Article，,卷期：2012年14-9] A novel iron-promoted tandem reaction of anilines with styrene oxides via C-C cleavage and C-H activation has been developed. The reaction utilizes an inexpensive FeCl3 as promoter and is suitable for forming a variety o... Phenyliodine Bis(trifluoroacetate)-Mediated Oxidative C-C Bond Formation: Synthesis of 3-Hydroxy-2-oxindoles and Spirooxindoles from Anilides [作者：WANG JUNWEI; YUAN YUCHENG; XIONG RUI; ZHANGNEGRERIE DAISY; DU YUNFEI; ZHAO KANG,期刊：Organic Letters, 页码：2210-2213 , 文章类型： Article，,卷期：2012年14-9] The reaction of phenyliodine bis(trifluoroacetate) (PIFA) with a series of anilides 1 (E = CO2Et) In CF3CH2OH was found to give 3-hydroxy-2-oxindole derivatives 2, while that with various anilides 1' (E = CON(R-4)Ar) aff... Dithiafulvenyl Unit as a New Donor for High-Efficiency Dye-Sensitized Solar Cells: Synthesis and Demonstration of a Family of Metal-Free Organic Sensitizers [作者：GUO KUNPENG; YAN KEYOU; LU XIAOQING; QIU YONGCAI; LIU ZHIKE; SUN JIANWEI; YAN FENG; GUO WENYUE; YANG SHIHE,期刊：Organic Letters, 页码：2214-2217 , 文章类型： Article，,卷期：2012年14-9] This work identifies the dithiafulvenyl unit as an excellent electron donor for constructing D-pi-A-type metal-free organic sensitizers of dye-sensitized solar cells (DSCs). Synthesized and tested are three sensitizers a... Scandium(III)-Catalyzed Enantioselective Allylation of Isatins Using Allylsilanes [作者：HANHAN NADINE V; TANG YNG C; TRAN NGON T; FRANZ ANNALIESE K,期刊：Organic Letters, 页码：2218-2221 , 文章类型： Article，,卷期：2012年14-9] The scandium(III)-catalyzed enantioselective Hosomi-Sakurai allylation of isatins with various substituted allylic silanes is described. A catalyst loading as low as 0.05 mol % Is utilized at room temperature to afford t... Access to Cyclic or Branched Peptides Using Bis(2-sulfanylethyl)amido Side-Chain Derivatives of Asp and Glu [作者：BOLL EMMANUELLE; DHEUR JULIEN; DROBECQ HERVE; MELNYK OLEG,期刊：Organic Letters, 页码：2222-2225 , 文章类型： Article，,卷期：2012年14-9] Bis(2-sulfanylethyl)amido (SEA) side-chain derivatives of aspartic and glutamic acids enable the synthesis of tail-to-side chain cyclic or branched peptides using standard Fmoc-SPPS followed by SEA native peptide ligatio... Selective Synthesis of a [3]Rotaxane Consisting of Size-Complementary Components and Its Stepwise Deslippage [作者：AKAE YOSUKE; OKAMURA HISASHI; KOYAMA YASUHITO; ARAI TAKAYUKI; TAKATA TOSHIKAZU,期刊：Organic Letters, 页码：2226-2229 , 文章类型： Article，,卷期：2012年14-9] An alpha-cyclodextrin-based size-complementary [3]rotaxane with an alkylene axle was selectively synthesized In one pot via an end-capping reaction with 2-bromophenyl isocyanate In water. Thermal degradation of the [3]ro... An Expeditious Total Synthesis of Both Diastereoisomeric Lipid Dihydroxytetrahydrofurans from Notheia anomala [作者：ROY SUDESHNA; SPILLING CHRISTOPHER D,期刊：Organic Letters, 页码：2230-2233 , 文章类型： Article，,卷期：2012年14-9] Short, high yielding syntheses of both diastereomers of the naturally occurring oxylipids 1 and 2 using a combination of organocatalytic hydroxylation of an aldehyde, alkene cross metathesis, and palladium(0) catalyzed c... Semipinacol Rearrangement of Cis-Fused beta-Lactam Diols into Keto-Bridged Bicyclic Lactams [作者：GRAINGER RICHARD S; BETOU MARIE; MALE LOUISE; PITAK MATEUSZ B; COLES SIMON J,期刊：Organic Letters, 页码：2234-2237 , 文章类型： Article，,卷期：2012年14-9] The 6-azabicyclo[3.2.1]octane ring system, prevalent in a range of biologically active molecules, is prepared through a novel semipinacol rearrangement utilizing a cyclic phosphorane or sulfite intermediate. The rearrang... Mechanism and Fluorescence Application of Electrochromism in Photochromic Dithienylcyclopentene [作者：LEE SUMIN; YOU YOUNGMIN; OHKUBO KEI; FUKUZUMI SHUNICHI; NAM WONWOO,期刊：Organic Letters, 页码：2238-2241 , 文章类型： Article，,卷期：2012年14-9] The kinetic process of key intermediates Involved in the electrochemical ring opening of photochromic dithienylcyclopentenes (DTEs) has been observed for the first time, where the electronic nature of the DTEs is an impo... Pyridine Is an Organocatalyst for the Reductive Ozonolysis of Alkenes [作者：WILLANDCHARNLEY RACHEL; FISHER THOMAS J; JOHNSON BRADLEY M; DUSSAULT PATRICK H,期刊：Organic Letters, 页码：2242-2245 , 文章类型： Article，,卷期：2012年14-9] Whereas the cleavage of alkenes by ozone typically generates peroxide Intermediates that must be decomposed in an accompanying step, ozonolysis in the presence of pyridine directly generates ketones or aldehydes through ... Enantioselective Preparation of cis-beta-Azidocyclopropane Esters by Cyclopropanation of Azido Alkenes Using a Chiral Dirhodium Catalyst [作者：GU PEIMING; SU YAN; WU XIUPING; SUN JIAN; LIU WANYI; XUE PING; LI RUI,期刊：Organic Letters, 页码：2246-2249 , 文章类型： Article，,卷期：2012年14-9] A diastereo- and enantiocontrolled preparation of the conformationally restricted cis-beta-azidocyclopropane esters have been developed. The Rh-2(S-DOSP)(4) was found to be an efficient catalyst in hexane for the cyclopr... Modified Shapiro Reactions with Bismesitylmagnesium As an Efficient Base Reagent [作者：KERR WILLIAM J; MORRISON ANGUS J; PAZICKY MAREK; WEBER TINA,期刊：Organic Letters, 页码：2250-2253 , 文章类型： Article，,卷期：2012年14-9] Bismesitylmagnesium has been shown to successfully mediate the Shapiro reaction. A range of tosylhydrazones has been subjected to the developed system, which furnishes exceptionally high incorporation of the introduced e... Palladium-Catalyzed Asymmetric Allylic Alkylation of Electron-Deficient Pyrroles with Meso Electrophiles [作者：TROST BARRY M; OSIPOV MAKSIM; DONG GUANGBIN,期刊：Organic Letters, 页码：2254-2257 , 文章类型： Article，,卷期：2012年14-9] Pyrroles can serve as competent nucleophiles with mesa electrophiles in the Pd-catalyzed asymmetric allylic alkylation. The products from this transformation were obtained as a single regio- and diastereomer in high yiel...