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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42条记录   Branch-Selective Synthesis of Oxindole and Indene Scaffolds: Transition Metal-Controlled Intramolecular Aryl Amidation Leading to C3 Reverse-Prenylated Oxindoles [作者：IGNATENKO VASILY A; DELIGONUL NIHAL; VISWANATHAN RAJESH,期刊：Organic Letters, 页码：3594-3597 , 文章类型： Article，,卷期：2010年12-16] In an effort to access biologically important scaffolds, a concise branch-selective synthesis of C3 tertiary oxindoles by Cu(I)-catalyzed aryl amidation and 2,2-dimethyl indene by Pd(0)-catalyzed Heck cyclization has bee... Catalytic and Regioselective Ring Expansion of Arylcyclobutanones with Trimethylsilyldiazomethane. Ligand-Dependent Entry to beta-Ketosilane or Enolsilane Adducts [作者：DABROWSKI JENNIFER A; MOEBIUS DAVID C; WOMMACK ANDREW J; KORNAHRENS ANNE F; KINGSBURY JASON S,期刊：Organic Letters, 页码：3598-3601 , 文章类型： Article，,卷期：2010年12-16] Divergent reactivity is uncovered in the homologation of arylcyclobutanones with trimethylsilyldiazomethane. With Sc(OTf)(3) as catalyst, enolsilanes are obtained with a high preference for methylene migration. By contra... Enzymatic Dynamic Kinetic Resolution of (+/-)-cis-N-(Alkoxycarbonyl)cyclopentane-1,2-diamines based on Spontaneous Racemization [作者：QUIJADA F JAVIER; GOTOR VICENTE; REBOLLEDO FRANCISCA,期刊：Organic Letters, 页码：3602-3605 , 文章类型： Article，,卷期：2010年12-16] Lipase B from Candida antarctica is an excellent catalyst for the enantioselective acetylation of different (+/-)-cis-N-(alkoxycarbonyl)cyclopentane-1,2-diamines. Depending on the alkoxycarbonyl group, a simple kinetic r... 12-Helix Folding of Cyclobutane beta-Amino Acid Oligomers [作者：FERNANDES CARLOS; FAURE SOPHIE; PEREIRA ELISABETH; THERY VINCENT; DECLERCK VALERIE; GUILLOT REGIS; AITKENT DAVID J,期刊：Organic Letters, 页码：3606-3609 , 文章类型： Article，,卷期：2010年12-16] The hexamer and octamer of trans-2-aminocyclobutane carboxylic acid were prepared and their conformational preferences studied experimentally and using molecular modeling. All observations suggest a marked preference for... Highly Selective Nickel-Catalyzed Three-Component Coupling of Alkynes with Enones and Alkenyl Boronic Acids: A Novel Route to Substituted 1,3-Dienes [作者：YANG CHUNMING; JEGANMOHAN MASILAMANI; PARTHASARATHY KANNIYAPPAN; CHENG CHIENHONG,期刊：Organic Letters, 页码：3610-3613 , 文章类型： Article，,卷期：2010年12-16] A highly regio- and stereoselective nickel-catalyzed three-component coupling of alkynes with enones and alkenyl boronic acids to afford highly substituted 1,3-dienes is described. The reaction can also be extended to cy... A Direct Synthesis of Oxazoles from Aldehydes [作者：GRAHAM THOMAS H,期刊：Organic Letters, 页码：3614-3617 , 文章类型： Article，,卷期：2010年12-16] An expedient method for the direct conversion of aldehydes to 2,4-disubstituted oxazoles is presented. The method relies on the oxidation of an oxazolidine formed from the condensation of serine with an aldehyde and proc... KMnO4-Mediated Oxidation as a Continuous Flow Process [作者：SEDELMEIER JOERG; LEY STEVEN V; BAXENDALE IAN R; BAUMANN MARCUS,期刊：Organic Letters, 页码：3618-3621 , 文章类型： Article，,卷期：2010年12-16] An efficient and easily scalable transformation of alcohols and aldehydes to carboxylic acids and nitroalkane derivatives to the corresponding carbonyls and carboxylic acids using permanganate as the oxidant within a con... Concise Total Synthesis of (+/-)-Pseudotabersonine via Double Ring-Closing Metathesis Strategy [作者：CHENG BO; SUNDERHAUS JAMES D; MARTIN STEPHEN F,期刊：Organic Letters, 页码：3622-3625 , 文章类型： Article，,卷期：2010年12-16] A concise synthesis of (+/-)-pseudotabersonine from commercially available 1-(phenylsulfonyl)-3-indolecarboxaldehyde has been accomplished. This synthesis features the convergent assembly of a key intermediate via a step... Stereocontrol in Radical Cyclization: Change in Rate-Determining Step [作者：HAKIM SIDDIKI S M A; SUGIMURA TAKASHI,期刊：Organic Letters, 页码：3626-3629 , 文章类型： Article，,卷期：2010年12-16] Intramolecular cyclization of an alpha-carbon radical of ester carrying a chiral 2,4-pentanediol tether shows low stereoselectivity when the radical carbon has an alkyl substituent, while the selectivity becomes high to ... Controlling Binding Affinities for Anions by a Photoswitchable Foldamer [作者：WANG YING; BIE FUSHENG; JIANG HUA,期刊：Organic Letters, 页码：3630-3633 , 文章类型： Article，,卷期：2010年12-16] A photoswitchable foldamer containing an azobenzene and phenyl-1,2,3-triazole motif was found to show photochemical/dark isomerization in a controllable and reversible manner in both the absence and presence of anions. T... Enantioselective Synthesis of Polysubstituted Cyclopentanones by Organocatalytic Double Michael Addition Reactions [作者：MA ANQI; MA DAWEI,期刊：Organic Letters, 页码：3634-3637 , 文章类型： Article，,卷期：2010年12-16] The O-TMS-protected diphenylprolinol-catalyzed cascade double Michael addition reactions of alpha,beta-unsaturated aldehydes with a beta-keto ester bearing a highly electron-deficient olefin unit occur smoothly to afford... Kinetic Solvent Effects on Hydrogen Abstraction Reactions from Carbon by the Cumyloxyl Radical. The Role of Hydrogen Bonding [作者：BIETTI MASSIMO; SALAMONE MICHELA,期刊：Organic Letters, 页码：3654-3657 , 文章类型： Article，,卷期：2010年12-16] A kinetic study of the H-atom abstraction reactions from 1,4-cyclohexadiene and triethylamine by the cumyloxyl radical has been carried out in different solvents. Negligible effects are observed with 1,4-cyclohexadiene, ... Diels-Alder Chemistry of Siloles and Their Transformation into Cyclohex-2-ene-1,4-cis-diols [作者：STEVENS ANDREW C; PAGENKOPF BRIAN L,期刊：Organic Letters, 页码：3658-3661 , 文章类型： Article，,卷期：2010年12-16] The synthesis of siloles with substitution patterns that are continuative toward natural product synthesis are described. Their reactivity in Die Is Alder chemistry was explored through thermal, Lewis acid, and high-pres... Direct Formation of Ring-Fused 1,3-Thiazine-2,4-dithiones from Aromatic o-Amino Carboxylic Acids: Observation of a Carbon Disulfide Mediated Thionation [作者：OTTERSBACH PHILIPP A; ELSINGHORST PAUL W; HAECKER HANSGEORG; GUETSCHOW MICHAEL,期刊：Organic Letters, 页码：3662-3665 , 文章类型： Article，,卷期：2010年12-16] A facile synthesis of 2H-3,1-benzothiazine-2,4(1H)-dithiones (trithioisatoic anhydrides) or 2H-naphtho[2,3-d][1,3]thiazine-2,4(1H)-dithione solely from anthranilic acids or 3-amino-2-naphthoic acid and carbon disulfide, ... Near-Infrared Absorbing Merocyanine Dyes for Bulk Heterojunction Solar Cells [作者：BUERCKSTUEMMER HANNAH; KRONENBERG NILS M; MEERHOLZ KLAUS; WUERTHNER FRANK,期刊：Organic Letters, 页码：3666-3669 , 文章类型： Article，,卷期：2010年12-16] A series of near-infrared absorbing merocyanine dyes bearing the strong electron-accepting 2-oxo-5-dicyanomethylene-pyrrolidine unit was synthesized and applied in combination with PC61BM and PC71BM in solution-processed... Direct Acylation of Aryl Chlorides with Aldehydes by Palladium-Pyrrolidine Co-catalysis [作者：COLBON PAUL; RUAN JIWU; PURDIE MARK; XIAO JIANLIANG,期刊：Organic Letters, 页码：3670-3673 , 文章类型： Article，,卷期：2010年12-16] A palladium catalyst system has been developed that allows for the direct acylation of aryl chlorides with aldehydes. The choice of ligand, as well as the presence of pyrrolidine and molecular sieves is shown to be criti...