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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72条记录   Stereoselective C-Glycosidations with Achiral and Enantioenriched Allenylsilanes [作者：BRAWN RYAN A; PANEK JAMES S,期刊：Organic Letters, 页码：4624-4627 , 文章类型： Article，,卷期：2010年12-20] Allenylsilanes are used as carbon nucleophiles in highly stereoselective Lewis acid-promoted C-glycosidations, resulting in the introduction of an internal alkyne with an adjacent stereocenter. Both achiral and chiral al... Synthesis of the Indolizino[7,6-c]quinoline Alkaloid Isaindigotidione [作者：HELLAL MALIK; CUNY GREGORY D,期刊：Organic Letters, 页码：4628-4631 , 文章类型： Article，,卷期：2010年12-20] The first synthesis of isaindigotidione has been developed utilizing a reaction sequence including an asymmetric rhodium-catalyzed 1,4-conjugate addition, an intramolecular aldol reaction, and a lactamization General Solution to the Synthesis of N-2-Substituted 1,2,3-Triazoles [作者：WANG XIAOJUN; ZHANG LI; KRISHNAMURTHY DHILEEPKUMAR; SENANAYAKE CHRIS H; WIPF PETER,期刊：Organic Letters, 页码：4632-4635 , 文章类型： Article，,卷期：2010年12-20] The regioselective N-alkylation of 1,2,3-triazoles 1-6 was studied Good to excellent N-2 selectivity and high chemical yields for N-2-substituted 4,5-dibromotriazoles 7 were obtained with 4,5-dibromo- and 4-bromo-5-trime... Versatile Set of Orthogonal Protecting Groups for the Preparation of Highly Branched Oligosaccharides [作者：BOLTJE THOMAS J; LI CHUNXIA; BOONS GEERTJAN,期刊：Organic Letters, 页码：4636-4639 , 文章类型： Article，,卷期：2010年12-20] A new set of orthogonal protecting groups has been developed based on the use of a diethylisopropylsilyl (DEIPS), methylnaphthyl (Nap), allyl ether, and levulinoyl (Lev) ester. The protecting groups are ideally suited fo... Gold-Catalyzed Cascade Annulations of 2-(Ynol)aryl Aldehydes: Facile Synthesis of Benzochromanes and Benzobicyclo[n.3.1]acetals [作者：LIU LEPING; HAMMOND GERALD B,期刊：Organic Letters, 页码：4640-4643 , 文章类型： Article，,卷期：2010年12-20] Gold-catalyzed reactions of 2-(ynol)aryl aldehydes were investigated. Benzochromanes were obtained from the reaction when AuCl3 was employed as the catalyst, whereas benzobicyclo[n 3.1]acetals were produced when triazole... Hofmann Rearrangement of Carboxamides Mediated by Hypervalent Iodine Species Generated in Situ from lodobenzene and Oxone: Reaction Scope and Limitations [作者：ZAGULYAEVA ALEKSANDRA A; BANEK CHRISTOPHER T; YUSUBOV MEKHMAN S; ZHDANKIN VIKTOR V,期刊：Organic Letters, 页码：4644-4647 , 文章类型： Article，,卷期：2010年12-20] Alkylcarboxamides can be converted to the respective amines by Hofmann rearrangement using hypervalent iodine species generated in situ from Phl and Oxone in aqueous acetonitrile On the basis of this reaction, a convenie... New Synthesis of Fluorinated Pyrazoles [作者：SURMONT RICCARDO; VERNIEST GUIDO; DE KIMPE NORBERT,期刊：Organic Letters, 页码：4648-4651 , 文章类型： Article，,卷期：2010年12-20] A new synthesis of fluorinated pyrazoles, a class of compounds with potential in medicinal chemistry, is described The treatment of benzoylfluoroacetonitrile with hydrazine yielded the expected new 3-amino-4-fluoropyrazo... Targeted Discovery of Polycyclic Tetramate Macrolactams from an Environmental Streptomyces Strain [作者：CAO SHUGENG; BLODGETT JOSHUA A V; CLARDY JON,期刊：Organic Letters, 页码：4652-4654 , 文章类型： Article，,卷期：2010年12-20] A targeted polymerase chain reaction (PCR)-based screening approach was used to identify candidate polycyclic tetramate macrolactam (PTM) biosynthetic gene clusters in environmental Streptomyces isolates. Isolation and c... Enantioselective Organocatalytic Michael Addition of Aldehydes to Trifluoroethylidene Malonates [作者：WEN LELE; SHEN QILONG; LU LONG,期刊：Organic Letters, 页码：4655-4657 , 文章类型： Article，,卷期：2010年12-20] An efficient, highly enantioselective, organocatalytic Michael addition reaction of aldehydes with trilluoroethylidene malonates is described The asymmetric reaction provided highly optically pure beta-trifluoromethyl al... Asymmetric Allylic Alkylation in Combination with Ring-Closing Metathesis for the Preparation of Chiral N-Heterocycles [作者：TEICHERT JOHANNES F; ZHANG SUYAN; VAN ZIJL ANTHONI W; SLAA JAN WILLEM; MINNAARD ADRIAAN J; FERINGA BEN L,期刊：Organic Letters, 页码：4658-4660 , 文章类型： Article，,卷期：2010年12-20] Asymmetric copper-catalyzed allylic substitution with methylmagnesium bromide is employed in combination with ring-closing olefin metathesis or ene-yne metathesis to achieve the synthesis of chiral, unsaturated nitrogen ... Asterogynins: Secondary Metabolites from a Costa Rican Endophytic Fungus [作者：CAO SHUGENG; ROSS LEILA; TAMAYO GISELLE; CLARDY JON,期刊：Organic Letters, 页码：4661-4663 , 文章类型： Article，,卷期：2010年12-20] An endophytic fungus isolated from the small palm Asterogyne martiona produced two unusual steroid-like metabolites, asterogynin A (1) and asterogynin B (2), along with the known compounds viridiol (3) and vindin (4) Ast... Anti-Influenza Virus Compound from Streptomyces sp RI18 [作者：TAKAGI MOTOKI; MOTOHASHI KEIICHIRO; NAGAI AYA; IZUMIKAWA MIHO; TANAKA MASAHIRO; FUSE SHINICHIRO; DOI TAKAYUKI; IWASE KEIICHIRO; KAWAGUCHI ATSUSHI; NAGATA KYOSUKE; TAKAHASHI TAKASHI; SHINYA KAZUO,期刊：Organic Letters, 页码：4664-4666 , 文章类型： Article，,卷期：2010年12-20] Screening for anti-influenza virus activity in compounds isolated from Streptomyces sp RI18, which was isolated using the membrane filter method, uncovered a novel compound, JBIR-68 (1), which contains a unique skeleton.... Chiral Phosphaalkene-Oxazoline Ligands for the Palladium-Catalyzed Asymmetric Allylic Alkylation [作者：DUGALTESSIER JULIEN; DAKE GREGORY R; GATES DEREK P,期刊：Organic Letters, 页码：4667-4669 , 文章类型： Article，,卷期：2010年12-20] Enantioselective catalysis in moderate to excellent yields and ee's has been accomplished using a phosphaalkene-based ligand system. Specifically, the palladium-catalyzed allylic alkylation of 1,3-diphenyl-2-propenyl ace... n-Alkane lsodesmic Reaction Energy Errors in Density Functional Theory Are Due to Electron Correlation Effects [作者：GRIMME STEFAN,期刊：Organic Letters, 页码：4670-4673 , 文章类型： Article，,卷期：2010年12-20] The isodesmic reaction energies of n-alkanes to ethane, which have so far been known to give systematic errors in standard OFT calculations, are successfully reproduced by SCS-MP2 and dispersion-corrected double-hybrid f... New Hydrophobic Vitamin B-12 Derivatives via Ring-Opening Reactions of c-Lactone [作者：PROINSIAS KEITH O; SESSLER JONATHAN L; KURCON SYLWESTER; GRYKO DOROTA,期刊：Organic Letters, 页码：4674-4677 , 文章类型： Article，,卷期：2010年12-20] A selective synthesis of new hydrophobic cobalamin derivatives bearing two different spacers has been accomplished via ring-opening reaction of c-lactone. The reaction of c-lactone with various amines afforded three type... Catalysis of Phosphorus(V)-Mediated Transformations: Dichlorination Reactions of Epoxides Under Appel Conditions [作者：DENTON ROSS M; TANG XIAOPING; PRZESLAK ADAM,期刊：Organic Letters, 页码：4678-4681 , 文章类型： Article，,卷期：2010年12-20] A stereospecific triphenylphosphine oxide-catalyzed 1,2-dichlorination reaction of epoxides has been developed. The reaction is effective for a range of terminal and internal epoxides In contrast to the classical Appel-t...