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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57条记录   Chiral Counteranion Synergistic Organocatalysis under High Temperature: Efficient Construction of Optically Pure Spiro[cyclohexanone-oxindole] Backbone [作者：LAN YUBAO; ZHAO HUA; LIU ZHAOMIN; LIU GUOGUI; TAO JINGCHAO; WANG XINGWANG,期刊：Organic Letters, 页码：4866-4869 , 文章类型： Article，,卷期：2011年13-18] The combination of a cinchona-based chiral primary amine and a BINOL-phosphoric acid has been demonstrated as a powerful and synergistic catalyst system for the double Michael addition of isatylidene malononitriles with ... Reactivity of N-(1,2,4-Triazolyl)-Substituted 1,2,3-Triazoles [作者：ZIBINSKY MIKHAIL; FOKIN VALERY V,期刊：Organic Letters, 页码：4870-4872 , 文章类型： Article，,卷期：2011年13-18] Synthetically useful rhodium(II) carbenes were obtained from N-(1,2,4-triazolyl)-substituted 1,2,3-triazoles and Rh(II) carboxylates. The electron-withdrawing 1,2,4-triazolyl group reveals the heretofore unknown reactivi... Nucleophilic Addition of Sulfonamides to Bromoacetylenes: Facile Preparation of Pyrroles [作者：YAMAGISHI MASAHITO; NISHIGAI KEN; HATA TAKESHI; URABE HIROKAZU,期刊：Organic Letters, 页码：4873-4875 , 文章类型： Article，,卷期：2011年13-18] Nucleophilic addition of sulfonamides to 1-bromo-1-alkynes provided (2)-N-(1-bromo-1-alken-2-yl)-p-toluenesulfonamides in good yield and in a highly regio- and stereoselective manner. Treatment of product (2)-N-(1-bromo-... DABCO-Bis(sulfur dioxide), DABSO, as a Convenient Source of Sulfur Dioxide for Organic Synthesis: Utility in Sulfonamide and Sulfamide Preparation [作者：WOOLVEN HOLLY; GONZALEZRODRIGUEZ CARLOS; MARCO ISABEL; THOMPSON AMBER L; WILLIS MICHAEL C,期刊：Organic Letters, 页码：4876-4878 , 文章类型： Article，,卷期：2011年13-18] The charge-transfer complex generated from the combination of DABCO and sulfur dioxide, DABSO, is a bench-stable colorless solid suitable for use in organic synthesis as a replacement for gaseous sulfur dioxide. The comp... Three-Step Synthesis of Cyclopropyl Peptidomimetics [作者：DUNLAP NORMA; LANKFORD KEVIN R; PATHIRANAGE ANURADHA LIYANA; TAYLOR JESSICA; REDDY NIKHIL; GOUGER DANIEL; SINGER PHILLIP; GRIFFIN KENT; REIBENSPIES JOSEPH,期刊：Organic Letters, 页码：4879-4881 , 文章类型： Article，,卷期：2011年13-18] An efficient approach to novel cyclopropyl peptidomimetics has been developed. The synthetic route involves a cyclopropanation using ethyl (dimethylsulfuranylidene)acetate (EDSA) as the key step and affords a cyclopropyl... Green Synthesis of Polycyclic Benzimidazole Derivatives and Organic Semiconductors [作者：MAMADA MASASHI; PEREZBOLIVAR CESAR; ANZENBACHER PAVEL JR,期刊：Organic Letters, 页码：4882-4885 , 文章类型： Article，,卷期：2011年13-18] Polycyclic benzimidazole derivatives, an important class of compounds in organic electronics and photovoltaics, were prepared using a solvent-free "green" process based on heating carboxylic acid anhydrides and arylene d... Sterostreins A-E, New Terpenoids from Cultures of the Basidiomycete Stereum ostrea BCC 22955 [作者：ISAKA MASAHIKO; SRISANOH URARAT; CHOOWONG WILUNDA; BOONPRATUANG THITIYA,期刊：Organic Letters, 页码：4886-4889 , 文章类型： Article，,卷期：2011年13-18] Sterostreins A-E (1, 2, 3a/3b, 4, and 5), five novel terpenoids, were isolated from cultures of the mushroom fungus Stereum ostrea BCC 22955. Sterostrein A (1) exhibited antimalarial activity (IC(50) 2.3 mu g/mL) and cyt... Total Syntheses of (+)-Vigulariol and (-)-Sclerophytin A [作者：CRIMMINS MICHAEL T; STAUFFER CHRISTINA S; MANS MARK C,期刊：Organic Letters, 页码：4890-4893 , 文章类型： Article，,卷期：2011年13-18] The total syntheses of (+)-vigulariol and (-)-sclerophytin A are reported in 15 steps and 16 steps, respectively, from a known compound. The flexible, readily scalable synthetic strategy allows for rapid construction of ... Rhodium-Catalyzed Olefin Isomerization/Enantioselective Intramolecular Alder-Ene Reaction Cascade [作者：OKAMOTO RYUICHI; OKAZAKI ERI; NOGUCHI KEIICHI; TANAKA KEN,期刊：Organic Letters, 页码：4894-4897 , 文章类型： Article，,卷期：2011年13-18] The olefin isomerization/enantioselective intramolecular Alder-ene reaction cascade was achieved by using a cationic rhodium(I)/(R)-BINAP complex as a catalyst. A variety of substituted dihydrobenzofurans and dihydronaph... Cucurbit[8]uril Rotaxanes [作者：RAMALINGAM VIJAYAKUMAR; URBACH ADAM R,期刊：Organic Letters, 页码：4898-4901 , 文章类型： Article，,卷期：2011年13-18] The synthesis of [2]rotaxanes, each comprising a viologen core threaded through a cucurbit[8]uril (Q8, Figure 1) macrocycle and stoppered by tetraphenylmethane groups, and their binding to second guests as inclusion comp... Palladium Induced Macrocyclic Preorganization for Stabilization of a Tetrathiafulvalene Mixed-Valence Dimer [作者：BEJGER CHRISTOPHER; DAVIS CHRISTINA M; PARK JUNG SU; LYNCH VINCENT M; LOVE JASON B; SESSLER JONATHAN L,期刊：Organic Letters, 页码：4902-4905 , 文章类型： Article，,卷期：2011年13-18] Ditopic metalation of a flexible "Pacman"-like tetrathiafulvalene (TTF) modified Schiff-base-calixpyrrole results in the stabilization upon oxidation of an otherwise difficult-to-access mixed-valence TTF radical dimer. E... A New Strategy for the Synthesis of Bisaminoacylated tRNAs [作者：NANGREAVE RYAN C; DEDKOVA LARISA M; CHEN SHENGXI; HECHT SIDNEY M,期刊：Organic Letters, 页码：4906-4909 , 文章类型： Article，,卷期：2011年13-18] Tandemly activated tRNAs participate effectively in protein synthesis and exhibit superior chemical and biochemical stability compared to the more commonly used singly aminoacylated tRNAs. While several bisaminoacylated ... Enantioselective One-Pot Synthesis of 2-Amino-4-(indol-3-yl)-4H-Chromenes [作者：CHEN WEILIANG; CAI YUNFEI; FU XUAN; LIU XIAOHUA; LIN LILI; FENG XIAOMING,期刊：Organic Letters, 页码：4910-4913 , 文章类型： Article，,卷期：2011年13-18] An enantioselective one-pot synthesis of 2-amino-4-(indol-3-yl)-4H-chromenes via a Knoevenagel/Pinner/Friedel-Crafts reaction of salicylaldehyde, malononitrile, and indole is presented. Moderate to good yields (up to 89%... Cu(II)-Catalyzed Intermolecular Amidation of C-Acylimine: A Convenient Access to gem-Diamino Acid Derivatives [作者：ZHU SHUJIE; DONG JIA; FU SHAOMIN; JIANG HUANFENG; ZENG WEI,期刊：Organic Letters, 页码：4914-4917 , 文章类型： Article，,卷期：2011年13-18] C-Acylimines 1 undergo intermolecular amidation with amides 2 to produce monoacyl gem-diamino acid derivatives 3 upon treatment with Cu(OTf)(2) (20 mol %)/PPh(3) (20 mol %) under mild conditions. This method provides an ... Synthesis of Subphthalocyanines as Probes for the Accessibility of Silica Nanochannels [作者：INCE MINE; GARTMANN NANDO; CLAESSENS CHRISTIAN G; TORRES TOMAS; BRUEHWILER DOMINIK,期刊：Organic Letters, 页码：4918-4921 , 文章类型： Article，,卷期：2011年13-18] The synthesis of a new subphthalocyanine is reported. Its structural and photophysical properties are ideal for probing the accessibility of arrays of silica nanochannels. A Colorimetric and Ratiometric Fluorescent Probe for Palladium [作者：JIANG JIE; JIANG HUIE; LIU WEI; TANG XIAOLIANG; ZHOU XI; LIU WEISHENG; LIU RUITING,期刊：Organic Letters, 页码：4922-4925 , 文章类型： Article，,卷期：2011年13-18] A colorimetric and ratiometric fluorescent probe for the palladium species has been developed based on the Pd(0)-catalyzed cleavage of an allyoxycarbonyl group of amines under mild conditions. The probe displays a highly...