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66条记录   Aziridinomitosanes via Lactam Cyclization [作者：WIEDNER SUSAN D; VEDEJS EDWIN,期刊：Organic Letters, 页码：4030-4033 , 文章类型： Article，,卷期：2010年12-18] Aziridinomitosane ketones 4 and 24 are accessed by internal acyl anion equivalent-lactam cyclization of 29 in a convergent route. The key aziridinolactam 6 is prepared by tin lithium exchange via the lithiated aziridine ... A Concise and Stereoselective Synthesis of Hydroxypyrrolidines: Rapid Synthesis of (+)-Preussin [作者：DRAPER JASON A; BRITTON ROBERT,期刊：Organic Letters, 页码：4034-4037 , 文章类型： Article，,卷期：2010年12-18] A convergent and stereoselective synthesis of 2,5-disubstituted 3-hydroxypyrrolidines has been developed that involves reductive annulation of beta-Iminochlorohydrins, which are readily available from beta-ketochlorohydr... 1,1-Dibromo-1-alkenes as Valuable Partners in the Copper-Catalyzed Direct Alkynylation of Azoles [作者：BERCIANO BEATRIZ PACHECO; LEBREQUIER SABRINA; BESSELIEVRE FRANCOIS; PIGUEL SANDRINE,期刊：Organic Letters, 页码：4038-4041 , 文章类型： Article，,卷期：2010年12-18] The copper-catalyzed direct alkynylation of azoles with 1,1-dibromo-1-alkenes as electrophiles is described. These easily accessible substrates are a useful addition to the field of direct alkynylations in an efficient a... Pd-Catalyzed Reaction of Sterically Hindered Hydrazones with Aryl Halides: Synthesis of Tetra-Substituted Olefins Related to iso-Combretastatin A4 [作者：BRACHET ETIENNE; HAMZE ABDALLAH; PEYRAT JEANFRANCOIS; BRION JEANDANIEL; ALAMI MOUAD,期刊：Organic Letters, 页码：4042-4045 , 文章类型： Article，,卷期：2010年12-18] PdCl2(MeCN)(2) in combination with dppp proved to be a powerful and efficient catalyst for the coupling of sterically hindered N-arylsulfonylhydrazones with aryl halides, thus providing a flexible and convergent access t... N-Annulated Perylene Fused Porphyrins with Enhanced Near-IR Absorption and Emission [作者：JIAO CHONGJUN; HUANG KUOWEI; GUAN ZHENPING; XU QINGHUA; WU JISHAN,期刊：Organic Letters, 页码：4046-4049 , 文章类型： Article，,卷期：2010年12-18] N-Annulated perylene fused porphyrins 1 and 2 were synthesized by oxidative dehydrogenation using a Sc(OTf)(3)/DDQ system. These newly synthesized hybrid molecules are highly soluble in organic solvents and exhibit remar... Kinetic Resolution of Racemic 2,3-Allenoates by Organocatalytic Asymmetric 1,3-Dipolar Cycloaddition [作者：YU JIE; CHEN WEIJIE; GONG LIUZHU,期刊：Organic Letters, 页码：4050-4053 , 文章类型： Article，,卷期：2010年12-18] The kinetic resolution of racemic 2,3-allenoates was realized via 1,3-dipolar cycloaddition by using a bisphosphoric acid catalyst, affording the optically active 2,3-allenoates and 3-methylenepyrrolidine derivatives in ... N-Acyldithieno[3,2-b:2 ',3 '-d]pyrroles: Second Generation Dithieno[3,2-b:2 ',3 '-d]pyrrole Building Blocks with Stabilized Energy Levels [作者：EVENSON SEAN J; RASMUSSEN SETH C,期刊：Organic Letters, 页码：4054-4057 , 文章类型： Article，,卷期：2010年12-18] A new class of dithieno[3,2-b:2',3'-d]pyrroles (DTPs) incorporating N-acyl groups have been prepared from 3-bromothiophene via copper-catalyzed amidation. The utilization of various electron-withdrawing acyl groups has a... Shorter Still: Compressing C-C Single Bonds [作者：MARTINEZGUAJARDO GERARDO; DONALD KELLING J; WITTMAACK BERNARD K; ANGEL VAZQUEZ MIGUEL; MERINO GABRIEL,期刊：Organic Letters, 页码：4058-4061 , 文章类型： Article，,卷期：2010年12-18] How short can a C-C single bond get? The bonding in a set of molecules that are related structurally to previously synthesized or theoretically examined systems with short C-C bonds is investigated. According to calculat... Lewis Acid Catalyzed Inverse Electron-Demand Diels-Alder Reaction of 1,2-Diazines [作者：KESSLER SIMON N; WEGNER HERMANN A,期刊：Organic Letters, 页码：4062-4065 , 文章类型： Article，,卷期：2010年12-18] A systematic approach toward Lewis acid catalyzed inverse electron-demand Diels-Alder (IEDDA) reactions of 1,2-diazines is described. The general concept is first investigated by DFT calculations, supported by spectrosco... One-Pot AgOAc-Mediated Synthesis of Polysubstituted Pyrroles from Primary Amines and Aldehydes: Application to the Total Synthesis of Purpurone [作者：LI QINGJIANG; FAN AILI; LU ZHIYAO; CUI YUXIN; LIN WENHAN; JIA YANXING,期刊：Organic Letters, 页码：4066-4069 , 文章类型： Article，,卷期：2010年12-18] A simple and efficient method for the synthesis of 1,3,4-trisubstituted or 3,4-disubstituted pyrroles has been developed. The reaction represents the first time that pyrroles are synthesized directly from readily availab... Per-6-amino-beta-cyclodextrin as a Reusable Promoter and Chiral Host for Enantioselective Henry Reaction [作者：KANAGARAJ KUPPUSAMY; SURESH PALANISWAMY; PITCHUMANI KASI,期刊：Organic Letters, 页码：4070-4073 , 文章类型： Article，,卷期：2010年12-18] A highly efficient enantioselective Henry reaction has been carried out using per-6-ABCD as a supramolecular chiral host and promoter to give the corresponding adduct with high yield (up to 99%) and enantiomeric excess (... Two Concise Total Syntheses of (-)-Bitungolide F [作者：ELMARROUNI ABDELATIF; JOOLAKANTI SHYAMSUNDER R; COLON AUDE; HERAS MONTSERRAT; ARSENIYADIS STELLIOS; COSSY JANINE,期刊：Organic Letters, 页码：4074-4077 , 文章类型： Article，,卷期：2010年12-18] The enantioselective total synthesis of the dual-specificity phosphatase inhibitor (-)-bitungolide F has been achieved using two convergent routes. Both strategies feature an asymmetric boron-mediated pentenylation, a st... Synthesis of Sulfuric Macrocycles and a Rotaxane through Thiol-yne Click and Dithiol Coupling Reactions [作者：ZHOU WEIDONG; ZHENG HAIYAN; LI YONGJUN; LIU HUIBIAO; LI YULIANG,期刊：Organic Letters, 页码：4078-4081 , 文章类型： Article，,卷期：2010年12-18] A macrocycle and a rotaxane were constructed by virtue of the thiol-yne click reaction under the irradiation of light in high yield, which can proceed at ambient temperature and humidity under an air atmosphere. Two disu... SmI2-Mediated 3-exo-trig Cyclization of beta,gamma-Unsaturated Carbonyl Compounds: Diastereoselective Synthesis of Cyclopropanols [作者：MARTINFONTECHA MAR; AGARRABEITIA ANTONIA R; ORTIZ MARIA J; ARMESTO DIEGO,期刊：Organic Letters, 页码：4082-4085 , 文章类型： Article，,卷期：2010年12-18] SmI2-mediated 3-exo-trig cyclizations of beta,gamma-unsaturated carbonyl compounds to generate cyclopropanols are not generally observed processes. The reported examples are limited to beta,gamma-unsaturated carbonyl com... Room-Temperature Aromatization of Tetrahydro-beta-carbolines by 2-Iodoxybenzoic Acid: Utility in a Total Synthesis of Eudistomin U [作者：PANARESE JOSEPH D; WATERS STEPHEN P,期刊：Organic Letters, 页码：4086-4089 , 文章类型： Article，,卷期：2010年12-18] 2-Iodoxybenzoic acid is a convenient reagent for the dehydrogenation of tetrahydro-beta-carbolines to their aromatic forms under mild conditions. The utility of the method was demonstrated in a total synthesis of the mar... Bridging the Visible: The Modulation of the Absorption by More than 450 nm [作者：DELBAERE STEPHANIE; VERMEERSCH GASTON; FRIGOLI MICHEL; MEHL GEORG H,期刊：Organic Letters, 页码：4090-4093 , 文章类型： Article，,卷期：2010年12-18] The coexistence of 18 isomers, identified by NMR spectroscopy and gathered into six states with very different absorption properties, is observed upon irradiation with selective wavelengths of a triphotochromic system jo...