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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49条记录   Intermolecular Reductive Radical Addition to 2-(2,2,2-Trifluoroethylidene)-1,3-dithiane 1-Oxide: Experimental and Theoretical Studies [作者：NAKAYAMA RYOTA; MATSUBARA HIROSHI; FUJINO DAISHI; KOBATAKE TAKAYUKI; YOSHIDA SUGURU; YORIMITSU HIDEKI; OSHIMA KOICHIRO,期刊：Organic Letters, 页码：5748-5751 , 文章类型： Article，,卷期：2010年12-24] Tin hydride mediated radical addition of organic halide to 2-(2,2,2-trifluoroethylidene)-1,3-dithiane 1-oxide has been devised. The reaction is equivalent to an unrealizable radical addition to trifluoromethylketene, pro... Stereoselective Synthesis and Structural Correction of the Naturally Occurring Lactone Stagonolide G [作者：ANGULOPACHON CESAR A; DIAZOLTRA SANTIAGO; MURGA JUAN; CARDA MIGUEL; MARCO J ALBERTO,期刊：Organic Letters, 页码：5752-5755 , 文章类型： Article，,卷期：2010年12-24] A convergent synthesis of the structure proposed for the naturally occurring lactone stagonolide G is described. All three stereocenters were created with the aid of asymmetric Brown allylations. The lactone ring was bui... Novel Sequential Sigmatropic Rearrangements of Allylic Diols: Application to the Total Synthesis of (-)-Kainic Acid [作者：KITAMOTO KATSUNORI; SAMPEI MANA; NAKAYAMA YASUAKI; SATO TAKAAKI; CHIDA NORITAKA,期刊：Organic Letters, 页码：5756-5759 , 文章类型： Article，,卷期：2010年12-24] Sequential sigmatropic rearrangements (Claisen/Claisen and Claisen/Overman) of enantiopure allylic diols are described. The reactions proceeded in complete diastereoselectivity without protecting group manipulations. The... Duboscic Acid: A Potent alpha-Glucosidase Inhibitor with an Unprecedented Triterpenoidal Carbon Skeleton from Duboscia macrocarpa [作者：WAFO PASCAL; KAMDEM RAMSAY S T; ALI ZULFIQAR; ANJUM SHAZIA; KHAN SHAMSUN NAHAR; BEGUM AFSHAN; KROHN KARSTEN; ABEGAZ BERHANU M; NGADJUI BONAVENTURE T; CHOUDHARY MUHAMMAD IQBAL,期刊：Organic Letters, 页码：5760-5763 , 文章类型： Article，,卷期：2010年12-24] Duboscic acid (1), a triterpenoid with a unique carbon backbone, was isolated from Duboscia macrocarpa Bocq. It is the first member of a new class of triterpenoids, for which the name "dubosane" is proposed. Duboscic aci... Self-Assembled Interwoven Cages from Triptycene-Derived Bis-Macrotricyclic Polyether and Multiple Branched Paraquat-Derived Subunits [作者：GUO JIABIN; JIANG YI; CHEN CHUANFENG,期刊：Organic Letters, 页码：5764-5767 , 文章类型： Article，,卷期：2010年12-24] On the basis of formation of a 1:2 complex between the triptycene-derived bis-macrotricyclic polyether and the paraquat derivative, two novel well-defined interwoven supramolecular cages were constructed by the [3 + 2] a... Stereoselective 6 pi-Electron Electrocyclic Ring Closures of 2-Halo-Amidotrienes via a Remote 1,6-Asymmetric Induction [作者：HAYASHI RYUJI; WALTON MARY C; HSUNG RICHARD P; SCHWAB JOHN H; YU XUELIANG,期刊：Organic Letters, 页码：5768-5771 , 文章类型： Article，,卷期：2010年12-24] A diastereoselective 6 pi-electrocyclic ring closure employing halogen-substituted 3-amidotrienes via a 1,6-remote asymmetric induction is described. This new asymmetric manifold for pericyclic ring closure further under... NHC-Catalyzed Spiro Bis-Indane Formation via Domino Stetter-Aldol-Michael and Stetter-Aldol-Aldol Reactions [作者：SANCHEZLARIOS EDUARDO; HOLMES JANICE M; DASCHNER CRYSTAL L; GRAVEL MICHEL,期刊：Organic Letters, 页码：5772-5775 , 文章类型： Article，,卷期：2010年12-24] Two novel domino NHC-catalyzed spirocyclizations are described herein, enabling the rapid construction of three new carbon-carbon bonds and a quaternary center with high diastereoselectivity. A variety of Spiro bis-indan... Synthesis of Stilbene and Distyrylbenzene Derivatives through Rhodium-Catalyzed Ortho-Olefination and Decarboxylation of Benzoic Acids [作者：MOCHIDA SATOSHI; HIRANO KOJI; SATOH TETSUYA; MIURA MASAHIRO,期刊：Organic Letters, 页码：5776-5779 , 文章类型： Article，,卷期：2010年12-24] Ortho-substituted benzoic acids efficiently undergo precisely ordered ortho-olefination/decarboxylation upon treatment with styrenes in the presence of a rhodium catalyst and silver salt oxidant to afford the correspondi... Ga(OTf)(3)-Catalyzed Direct Substitution of Alcohols with Sulfur Nucleophiles [作者：HAN XINPING; WU JIMMY,期刊：Organic Letters, 页码：5780-5782 , 文章类型： Article，,卷期：2010年12-24] It is reported that Ga(OTf)(3) catalyzes the direct displacement of alcohols with sulfur nucleophiles. The products are versatile intermediates that can be utilized in carbon carbon, carbon sulfur bond formation or used ... Nickel-Catalyzed Cross-Coupling of Potassium Aryl- and Heteroaryltrifluoroborates with Unactilvated Alkyl Halides [作者：MOLANDER GARY A; ARGINTARU O ANDREEA; ARON IOANA; DREHER SPENCER D,期刊：Organic Letters, 页码：5783-5785 , 文章类型： Article，,卷期：2010年12-24] A method for the cross-coupling of alkyl electrophiles with various potassium aryl- and heteroaryltrifluoroborates has been developed. Nearly stoichiometric amounts of organoboron species could be employed to cross-coupl... Controlling Binding Affinities for Anions by a Photoswitchable Foldamer (vol 12, pg 3631, 2010) [作者：WANG YING; BIE FUSHENG; JIANG HUA,期刊：Organic Letters, 页码：5786-5786 , 文章类型： Correction，,卷期：2010年12-24] (4S,5S)-2,2,4-Triethy1-5-methyl-1,3-dioxolane: A New Volatile Released by a Triatomine Bug [作者：UNELIUS C R; BOHMAN B; LORENZO M G; TROEGER A; FRANKE S; FRANCKE W,期刊：Organic Letters, 页码：5601-5603 , 文章类型： Article，,卷期：2010年12-24] Adults of the triatomine bug Triatoma brasiliensis release 2,2,4-triethy1-5-methy1-1,3-dioxolane (1) as a mixture of the (4S,5S)- and (4R,5R)-enantiomers in a ratio of 4:1. Among the volatile acetals identified from inse... Chiral Ruthenium Lewis Acid Catalyzed Intramolecular Diels-Alder Reactions [作者：THAMAPIPOL SIRINPORN; BERNARDINELLI GERALD; BESNARD CELINE; KUENDIG E PETER,期刊：Organic Letters, 页码：5604-5607 , 文章类型： Article，,卷期：2010年12-24] Single point binding ruthenium Lewis acid catalysts [Ru(acetone)(S,S)-BIPHOP-F)CpliSbF(6)] ((S,S)-1b) and [Ru(acetone)(S,S)-BIPHOP-F)(indenyl)[SbF6] ((S,S)-1c) efficiently catalyze intramolecular Diels-Alder (IMDA) react... N-(2-Pyridylmethyl)imines as Azomethine Precursors in Catalytic Asymmetric [3+2] Cycloadditions [作者：PADILLA SILVIA; TEJERO RUBEN; ADRIO JAVIER; CARRETERO JUAN C,期刊：Organic Letters, 页码：5608-5611 , 文章类型： Article，,卷期：2010年12-24] An efficient Cu(I)-catalyzed asymmetric [3 + 2] cycloaddition of N-(2-pyridylmethyl) imines has been developed. In the presence of a Cu(CH3CN)(4)PF6/bisoxazoline catalyst system, high levels of enantioselectivity (up to ... Tetraureas versus Triureas in Sulfate Binding [作者：JIA CHUANDONG; WU BIAO; LI SHAOGUANG; HUANG XIAOJUAN; YANG XIAOJUAN,期刊：Organic Letters, 页码：5612-5615 , 文章类型： Article，,卷期：2010年12-24] By mimicking the scaffolds of oligopyridine-based ligands, triurea and tetraurea receptors have been developed for sulfate binding. The triureas (L-1, L-2) show stronger binding of sulfate than tetraureas (L-3, L-4) in D... Highly Enantioselective and Efficient Organocatalytic Aldol Reaction of Acetone and beta,gamma-Unsaturated alpha-Keto Ester [作者：LI PENGFEI; ZHAO JUNLING; LI FENGBO; CHAN ALBERT S C; KWONG FUK YEE,期刊：Organic Letters, 页码：5616-5619 , 文章类型： Article，,卷期：2010年12-24] An effective organocatalytic asymmetric aldol reaction of acetone to beta,gamma-unsaturated alpha-keto ester has been developed. In the presence of 5 mol % of 9-amino (9-deoxy)-epicinchona alkaloid and 10 mol A of 4-nitr...