个性化文献订阅>文章检索

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99条记录   Enantioselective N-Heterocyclic Carbene-Catalyzed Michael Addition to alpha,beta-Unsaturated Aldehydes by Redox Oxidation [作者：RONG ZIQIANG; JIA MINQIANG; YOU SHULI,期刊：Organic Letters, 页码：4080-4083 , 文章类型： Article，,卷期：2011年13-15] Enantioselective N-heterocyclic carbene-catalyzed Michael addition reactions to alpha,beta-unsaturated aldehydes by redox oxidation were realized. With 10 mol % of camphor-derived triazolium salt D, 15 mol % of DBU, 5 mo... Monoalkylation of Acetonitrile by Primary Alcohols Catalyzed by Iridium Complexes [作者：ANXIONNAT BRUNO; PARDO DOMINGO GOMEZ; RICCI GINO; COSSY JANINE,期刊：Organic Letters, 页码：4084-4087 , 文章类型： Article，,卷期：2011年13-15] The monoalkylation of acetonitrile by primary alcohols was achieved in a one-pot sequence In the presence of iridium catalysts. A diversity of nitriles has been obtained from aryl- and alkyl-methanols in excellent yield.... Total Synthesis of (-)-CP(2)-Disorazole C(1) [作者：HOPKINS CHAD D; SCHMITZ JOHN C; CHU EDWARD; WIPR PETER,期刊：Organic Letters, 页码：4088-4091 , 文章类型： Article，,卷期：2011年13-15] The total synthesis of a bis-cyclopropane analog of the antimitotic natural product (-)-disorazole C(1) was accomplished in 23 steps and 1.1% overall yield. A vinyl cyclopropane cross-metathesis reaction generated a key ... Synthesis and Optical Properties of Soluble Near-Infrared Arylene Bisthienoimidazole Dyes [作者：LUO MIN; WANG QUN; WANG ZHI YUAN,期刊：Organic Letters, 页码：4092-4095 , 文章类型： Article，,卷期：2011年13-15] Soluble, film-forming near-infrared arylene bisthienoimidazole dyes with a band gap of 1.2-1.3 eV are electrochromic and absorb strongly at the telecommunication wavelengths (1310 and 1550 nm) in the oxidized state. Solvent Effects in Hydrogen Abstraction from Cholesterol by Benzophenone Triplet Excited State [作者：ANDREU INMACULADA; PALUMBO FABRIZIO; TILOCCA FEDELE; MORERA ISABEL M; BOSCA FRANCISCO; MIRANDA MIGUEL A,期刊：Organic Letters, 页码：4096-4099 , 文章类型： Article，,卷期：2011年13-15] Hydrogen abstraction from the C-7 position of cholesterol (Ch) by triplet excited benzophenone (BZP) exhibits remarkable solvent-dependence in product studies. Kinetic measurements on the intramolecular version of the pr... Palladium-Catalyzed C-S Coupling: Access to Thioethers, Benzo[b]thiophenes, and Thieno[3,2-b]thiophenes [作者：KUHN MARIUS; FALK FLORIAN C; PARADIES JAN,期刊：Organic Letters, 页码：4100-4103 , 文章类型： Article，,卷期：2011年13-15] The first C-S bond formation/cross-coupling/cyclization domino reaction using thiourea as a cheap and easy to handle dihydrosulfide surrogate has been developed. Structurally Important biarylthioether, benzo[b]thiophenes... Enhanced Glutathione Peroxidase Activity of Conformationally Restricted Naphthalene peri-Dichalcogenides [作者：PRESS DAVID J; BACK THOMAS G,期刊：Organic Letters, 页码：4104-4107 , 文章类型： Article，,卷期：2011年13-15] Conformationally restricted naphthalene peri-diselenides function as glutathione peroxidase mimetics with superior catalytic activity to that displayed by typical acyclic diaryl diselenides. Their activity was increased ... Enantioselective Total Synthesis of (-)-Zampanolide, a Potent Microtubule-Stabilizing Agent [作者：GHOSH ARUN K; CHENG XU,期刊：Organic Letters, 页码：4108-4111 , 文章类型： Article，,卷期：2011年13-15] An enantioselective total synthesis of zampanolide has been accomplished using a novel DDQ/Bronsted acid promoted cyclization as the key reaction. The synthesis features cross-metathesis to construct the trisubstituted o... Recognition Properties of Acyclic Glycoluril Oligomers [作者：LUCAS DERICK; ISAACS LYLE,期刊：Organic Letters, 页码：4112-4115 , 文章类型： Article，,卷期：2011年13-15] The fragmentation reaction of bis-nor-seco-CB[10] with 3,5-dimethylphenol (3) delivers methylene bridged glycoluril pentamer 5 in 81% yield. The host-guest recognition properties of the previously known tetramer 4 and th... On the Elucidation of the Mechanism of Vinca Alkaloid Fluorination in Superacidic Medium [作者：GIOVANELLI EMERSON; LEROUX SEBASTIEN; MOISAN LIONEL; CARREYRE HELENE; THUERY PIERRE; BUISSON DAVIDALEXANDRE; MEDDOUR ABDELKRIM; COUSTARD JEANMARIE; THIBAUDEAU SEBASTIEN; ROUSSEAU BERNARD; NICOLAS MARC; HELLIER PAUL; DORIS ERIC,期刊：Organic Letters, 页码：4116-4119 , 文章类型： Article，,卷期：2011年13-15] Detailed investigations on one of the key steps of the superacidic fluorination of Vinca alkaloids that is the origin of C20' activation are reported. While two different pathways can be envisioned for the emergence of t... Di-tert-butylisobutylsilyl, Another Useful Protecting Group [作者：LIANG HUAN; HU LIN; COREY E J,期刊：Organic Letters, 页码：4120-4123 , 文章类型： Article，,卷期：2011年13-15] The di-tert-butylisobutylsilyl (BIBS) protecting group offers new possibilities for synthetic processes because of its steric bulk, robustness of its derivatives, and other special properties. 1,3-Dipolar Cycloaddition of Hydrazones with alpha-Oxo-ketenes: A Three-Component Stereoselective Entry to Pyrazolidinones and an Original Class of Spirooxindoles [作者：PRESSET MARC; MOHANAN KISHOR; HAMANN MARIE; COQUEREL YOANN; RODRIGUEZ JEAN,期刊：Organic Letters, 页码：4124-4127 , 文章类型： Article，,卷期：2011年13-15] Stereodefined monocyclic, spirobicyclic, and bis-spirotricyclic pyrazolidin-3-ones can be prepared efficiently by a three-component reaction involving a 1,3-dipolar cycloaddition of azomethine imines obtained from hydraz... Fluoroanalogs of DDT: Superacidic BF(3)-H(2)O Catalyzed Facile Synthesis of 1,1,1-Trifluoro-2,2-diarylethanes and 1,1-Difluoro-2,2-diarylethanes [作者：PRAKASH G K SURYA; PAKNIA FARZANEH; MATHEW THOMAS; MLOSTON GZREGORZ; JOSCHEK JENS P; OLAH GEORGE A,期刊：Organic Letters, 页码：4128-4131 , 文章类型： Article，,卷期：2011年13-15] The one-pot synthesis of 1,1,1-trifluoro- and 1,1-difluoro-2,2-diarylethanes from arenes and fluorinated hemiacetals in the BF(3)-H(2)O system is described. The reaction is simple, clean, and convenient, eliminating the ... Achieving Chemo-, Regio-, and Stereoselectivity in Palladium-Catalyzed Reaction of gamma-Borylated Allylic Acetates [作者：KUKKADAPU KRISHNA KISHORE; OUACH AZIZ; LOZANO PEDRO; VAULTIER MICHEL; PUCHEAULT MATHIEU,期刊：Organic Letters, 页码：4132-4135 , 文章类型： Article，,卷期：2011年13-15] Three-carbon highly functionalized gamma-borylated allylic acetates underwent a regio- and stereocontrolled Tsuji-Trost reaction in the presence of palladium complexes. An Ipso substitution of the acetate with complete s... Synthesis of o-(Dimethylamino)aryl Ketones and Acridones by the Reaction of 1,1-Dialkylhydrazones and Arynes [作者：DUBROVSKIY ANTON V; LAROCK RICHARD C,期刊：Organic Letters, 页码：4136-4139 , 文章类型： Article，,卷期：2011年13-15] A novel, efficient route to biologically and pharmaceutically Important o-(dimethylamino)aryl ketones and acridones has been developed starting from readily available 1,1-dimethylhydrazones of aldehydes and o-(trimethyls... Ni(II) Salts and 2-Propanol Effect Catalytic Reductive Coupling of Epoxides and Alkynes [作者：BEAVER MATTHEW G; JAMISON TIMOTHY F,期刊：Organic Letters, 页码：4140-4143 , 文章类型： Article，,卷期：2011年13-15] A Ni-catalyzed reductive coupling of alkynes and epoxides using Ni(II) salts and simple alcohol reducing agents is described. Whereas previously reported conditions relied on Ni(cod)(2) and Et(3)B, this system has severa...