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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77条记录   Asymmetric Diels-Alder Reaction of 2-Methyl-3-indolylmethanols via in Situ Generation of o-Quinodimethanes [作者：XIAO YOUCAI; ZHOU QINGQING; DONG LIN; LIU TIANYU; CHEN YINGCHUN,期刊：Organic Letters, 页码：5940-5943 , 文章类型： Article，,卷期：2012年14-23] An asymmetric Diels-Alder reaction of 2-methyl-3-indolylmethanols and alpha,beta-unsaturated aldehydes has been developed that relies on in situ generation of active indole-2,3-quinodimethane intermediates under mild aci... Efficient Synthesis of Chiral 2,2 '-Bipyrrolidines by an anti-Selective Alkene Diamination [作者：MUELLER CHRISTIAN H; FROEHLICH ROLAND; DANILIUC CONSTANTIN G; HENNECKE ULRICH,期刊：Organic Letters, 页码：5944-5947 , 文章类型： Article，,卷期：2012年14-23] The rapid and efficient construction of complex chiral bicyclic amines is possible using a novel alkene diamination reaction. Electrophilic iodinating agents promote the intramolecular anti-selective diamination of alken... Benzazoles from Aliphatic Amines and o-Amino/Mercaptan/Hydroxyanilines: Elemental Sulfur as a Highly Efficient and Traceless Oxidizing Agent [作者：THANH BINH NGUYEN; ERMOLENKO LUDMILA; DEAN WILLIAM A; ALMOURABIT ALI,期刊：Organic Letters, 页码：5948-5951 , 文章类型： Article，,卷期：2012年14-23] A novel remarkably simple solvent-free and catalyst-free synthesis of benzazoles from alkylamines and o-hydroxy/amino/mercaptan anilines using elemental sulfur as traceless oxidizing agent has been developed. Total Synthesis of Natural p-Quinol Cochinchinenone [作者：BARRADAS SILVIA; HERNANDEZTORRES GLORIA; URBANO ANTONIO; CARMEN CARRENO M,期刊：Organic Letters, 页码：5952-5955 , 文章类型： Article，,卷期：2012年14-23] Cochinchinenone has been synthesized in only five steps and four pots and in 58% overall yield from commercially available 2,3-dimethoxy-4-hydroxy-benzaldehyde and OPMB-protected p-hydroxy acetophenone, the key step bein... Divergent Synthesis of Cytotoxic Styryl Lactones Related to Goniobutenolides A and B, and to Crassalactone D [作者：POPSAVIN VELIMIR; KOVACEVIC IVANA; BENEDEKOVIC GORAN; POPSAVIN MIRJANA; KOJIC VESNA; BOGDANOVIC GORDANA,期刊：Organic Letters, 页码：5956-5959 , 文章类型： Article，,卷期：2012年14-23] Goniobutenolides A (1) and B (2), crassalactone D (3), 4-epi-crassalactone D (4), and the corresponding 7-epimers have been synthesized starting from D-glucose. The key step in the synthesis of 1 and 2 is a new one-pot s... Soluble-support-assisted Electrochemical Reactions: Application to Anodic Disulfide Bond Formation [作者：KITADA SHINGO; TAKAHASHI MASAHITO; YAMAGUCHI YUSUKE; OKADA YOHEI; CHIBA KAZUHIRO,期刊：Organic Letters, 页码：5960-5963 , 文章类型： Article，,卷期：2012年14-23] A soluble-support-assisted technique was successfully applied to electrochemical reactions, leading to anodic disulfide bond formation. The support-bound peptide was soluble in electrolyte solution, allowing electron tra... Direct Intermolecular Aniline Ortho-Arylation via Benzyne Intermediates [作者：THANH TRUONG; DAUGULIS OLAFS,期刊：Organic Letters, 页码：5964-5967 , 文章类型： Article，,卷期：2012年14-23] A method for direct, transition-metal-free ortho-arylation of anilines by aryl chlorides, bromides, fluorides, and triflates has been developed. This methodology provides the most direct approach to 2-arylanilines since ... Assembly of Spirooxindole Derivatives via Organocatalytic Iminium-Enamine Cascade Reactions [作者：ALBERTSHOFER KLAUS; ANDERSON KIMBERLY E; BARBAS CARLOS F III,期刊：Organic Letters, 页码：5968-5971 , 文章类型： Article，,卷期：2012年14-23] The assembly of complex spirocyclopentaneoxindoles via a novel organocatalytic iminium-enamine cascade process is reported. Reactions between 3-substituted oxindoles and alpha,beta-unsaturated aldehydes catalyzed by seco... A General Organocatalytic Approach toward the Enantioselective Total Synthesis of Indolizidine Based Alkaloids [作者：ABELS FALKO; LINDEMANN CHRIS; KOCH EVA; SCHNEIDER CHRISTOPH,期刊：Organic Letters, 页码：5972-5975 , 文章类型： Article，,卷期：2012年14-23] Four indolizidine based alkaloids (IBAs) have been synthesized in a highly enantioselective, straightforward, and flexible manner. As a key step our previously developed Bronsted acid catalyzed vinylogous Mannich reactio... Expedient Approach to Novel N-Unprotected Bicyclic Azapyrimidine and Pyridine Structures [作者：LIU ZHIBO; QIN LING; ZARD SAMIR Z,期刊：Organic Letters, 页码：5976-5979 , 文章类型： Article，,卷期：2012年14-23] A direct route to novel bicyclic N-unprotected azapyrimidine structures including fused five-, six-, and seven-membered rings is described involving radical addition and cyclization of xanthates; this approach could be p... Copper Catalyzed N-Arylation of Amidines with Aryl Boronic Acids and One-Pot Synthesis of Benzimidazoles by a Chan-Lam-Evans N-Arylation and C-H Activation/C-N Bond Forming Process [作者：LI JIHUI; BENARD SEBASTIEN; NEUVILLE LUC; ZHU JIEPING,期刊：Organic Letters, 页码：5980-5983 , 文章类型： Article，,卷期：2012年14-23] Mono-N-arylation of benzamidines 1 with aryl boronic acids 2 was effectively achieved in the presence of a catalytic amount of Cu(OAc)(2) and NaOPiv under mild aerobic conditions. Combining this step with an intramolecul... Water Control over the Chemoselectivity of a Ti/Ni Multimetallic System: Heck- or Reductive-Type Cyclization Reactions of Alkyl Iodides [作者：MILLAN ALBA; ALVAREZ DE CIENFUEGOS LUIS; MIGUEL DELIA; CAMPANA ARACELI G; CUERVA JUAN M,期刊：Organic Letters, 页码：5984-5987 , 文章类型： Article，,卷期：2012年14-23] A versatile Ti/Ni multimetallic protocol is described for the efficient catalysis of two different reactions, namely a Heck- and reductive-type cyclization of alkyl iodides, in the absence or presence of water, respectiv... An Oxidopyrylium Cyclization/Ring-Opening Route to Polysubstituted alpha-Hydroxytropolones [作者：MECK CHRISTINE; MOHD NOUSHAD; MURELLI RYAN P,期刊：Organic Letters, 页码：5988-5991 , 文章类型： Article，,卷期：2012年14-23] alpha-Hydroxytropolones are a class of molecules with therapeutic potential against several human diseases. However, structure-activity relationship studies on these molecules have been limited due to a scarcity of effic... Graphene-Supported RuO2 Nanoparticles for Efficient Aerobic Cross-Dehydrogenative Coupling Reaction in Water [作者：MENG QINGYUAN; LIU QIANG; ZHONG JIANJI; ZHANG HUIHUI; LI ZHIJUN; CHEN BIN; TUNG CHENHO; WU LIZHU,期刊：Organic Letters, 页码：5992-5995 , 文章类型： Article，,卷期：2012年14-23] A cross-dehydrogenative coupling (CDC) reaction between tertiary amines and nitroalkanes has been realized under an oxygen atmosphere in water simply by using graphene-supported RuO2 as the catalyst, which was made from ... An Enantioselective Total Synthesis of Helioporins C and E [作者：LOELSBERG WIBKE; WERLE SUSEN; NEUDOERFL JOERGMARTIN; SCHMALZ HANSGUENTHER,期刊：Organic Letters, 页码：5996-5999 , 文章类型： Article，,卷期：2012年14-23] A short and enantioselective total synthesis of helioporins C and E, which are bioactive marine diterpenes containing a serrulatane or amphilectane skeleton, was elaborated. The chirogenic step, i.e. a Cu(I)-catalyzed al... Palladium-Catalyzed Reactions of Enol Ethers: Access to Enals, Furans, and Dihydrofurans [作者：LAUER MATTHEW G; HENDERSON WILLIAM H; AWAD AMNEH; STAMBULI JAMES P,期刊：Organic Letters, 页码：6000-6003 , 文章类型： Article，,卷期：2012年14-23] The palladium-catalyzed oxidation of alkyl enol ethers to enals, which employs low loadings of a palladium catalyst, is described. The mild oxidation conditions tolerate a diverse array of functional groups, while allowi...