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83条记录   Ring-Closing Metathesis Approaches for the Solid-Phase Synthesis of Cyclic Peptoids [作者：KHAN SHARAF NAWAZ; KIM ARIM; GRUBBS ROBERT H; KWON YONGUK,期刊：Organic Letters, 页码：1582-1585 , 文章类型： Article，,卷期：2011年13-7] Cyclic peptoids were efficiently synthesized on a solid phase in high yields utilizing ring-closing metathesis (RCM). This method should be a valuable tool for easy access to cyclic peptoid libraries and various cyclic c... Novel Fmoc-Polyamino Acids for Solid-Phase Synthesis of Defined Polyamidoamines [作者：SCHAFFERT DAVID; BADGUJAR NARESH; WAGNER ERNST,期刊：Organic Letters, 页码：1586-1589 , 文章类型： Article，,卷期：2011年13-7] A versatile solid-phase approach to sequence-defined polyamidoamines was developed. Four different Fmoc-polyamino acid building blocks were synthesized by selective protection of symmetrical oligoethylenimine precursors ... Activated Alkene Dependent One-Pot, Three-Component Aza-Morita-Baylis-Hillman Reaction of Ferrocenealdehyde: Synthesis of Highly Functionalized Diverse Ferrocene Derivatives [作者：MADHAVAN SUCHITHRA; SHANMUGAM PONNUSAMY,期刊：Organic Letters, 页码：1590-1593 , 文章类型： Article，,卷期：2011年13-7] Activated alkene dependent one-pot, three-component aza-Morita-Baylis-Hillman (aza-MBH) reaction of ferrocenealdehyde afforded simple aza-MBH adduct of ferrocenealdehyde, unusual piperidine, beta-amino acid residue, and ... Asymmetric Synthesis of Polyhydroxylated Pyrrolizidines via Transannular Iodoamination with Concomitant N-Debenzylation [作者：BROCK E ANNE; DAVIES STEPHEN G; LEE JAMES A; ROBERTS PAUL M; THOMSON JAMES E,期刊：Organic Letters, 页码：1594-1597 , 文章类型： Article，,卷期：2011年13-7] The doubly diastereoselective "matched" conjugate addition of lithium (R)-N-but-3-enyl-N-(alpha-methyl-p-methoxybenzyl)amide to tert-butyl (4S,5R,E)-4,5-O-isopropylidene-2,7-dienoate (derived from D-ribose in 3 steps) an... Substituted 1,3-Bis(imino)isoindole Diols: A New Class of Proton Transfer Dyes [作者：HANSON KENNETH; PATEL NIRAL; WHITED MATTHEW T; DJUROVICH PETER I; THOMPSON MARK E,期刊：Organic Letters, 页码：1598-1601 , 文章类型： Article，,卷期：2011年13-7] A new class of excited-state intramolecular proton transfer (ESIPT) dyes based on a 1,3-bis(imino)isoindole diol motif has been prepared. These molecules exhibit orange emission (similar to 600 nm) with a large apparent ... Organocatalytic Approach to Polysubstituted Piperidines and Tetrahydropyrans [作者：WANG YOU; ZHU SHAOLIN; MA DAWEI,期刊：Organic Letters, 页码：1602-1605 , 文章类型： Article，,卷期：2011年13-7] Polysubstituted piperidines and tetrahydropyrans are synthesized from aldehydes and two classes of trisubstituted nitroolefins via an O-TMS protected diphenylprolinol catalyzed domino Michael addition/aminalization (or a... Fmoc-Based Synthesis of Peptide Thioesters for Native Chemical Ligation Employing a tert-Butyl Thiol Linker [作者：RAZ RICHARD; RADEMANN JOERG,期刊：Organic Letters, 页码：1606-1609 , 文章类型： Article，,卷期：2011年13-7] tert-Butyl thioesters display an astonishing stability toward secondary amines in basic milieu, in contrast to other alkyl and aryl thioesters. Exploiting this enhanced stability, peptide thioesters were synthesized in a... Enhanced Performance of the Dye-Sensitized Solar Cells with Phenothiazine-Based Dyes Containing Double D-A Branches [作者：CAO DERONG; PENG JINAN; HONG YANPING; FANG XIAOMING; WANG LINGYUN; MEIER HERBERT,期刊：Organic Letters, 页码：1610-1613 , 文章类型： Article，,卷期：2011年13-7] Double donor-acceptor (D-A) branched dyes (DBD) with a phenothiazine unit as electron donor and a 2-cyanoacrylic acid unit as electron acceptor were synthesized and used as sensitizers for solar cells (DSSCs). The conver... Palladium-Catalyzed Oxidative sp(2) C-H Bond Acylation with Alcohols [作者：XIAO FUHONG; QI SHUAI; ZHAO FENG; BASLE OLIVIER; DENG GUOJUN; LI CHAOJUN,期刊：Organic Letters, 页码：1614-1617 , 文章类型： Article，,卷期：2011年13-7] An efficient method was developed for the direct acylation of arene sp(2) C-H bonds with alcohols using palladium chloride as a catalyst and peroxide as the oxidant. The alcohols were oxidized to their corresponding alde... Multiple Sonogashira Reactions of Polychlorinated Molecules. Synthesis and Photophysical Properties of the First Pentaalkynylpyridines [作者：EHLERS PETER; NEUBAUER ANTJE; LOCHBRUNNER STEFAN; VILLINGER ALEXANDER; LANGER PETER,期刊：Organic Letters, 页码：1618-1621 , 文章类型： Article，,卷期：2011年13-7] Hitherto unknown pentaalkynylpyridines have been prepared in high yields by Sonogashira cross-coupling reactions of pentachloropyridine. Their photophysical properties were studied and compared to those of penta- and hex... Copper-Catalyzed Benzylic C-H Oxygenation under an Oxygen Atmosphere via N-H Imines as an Intramolecular Directing Group [作者：ZHANG LINE; ANG GIM YEAN; CHIBA SHUNSUKE,期刊：Organic Letters, 页码：1622-1625 , 文章类型： Article，,卷期：2011年13-7] Copper-catalyzed benzylic C-H oxygenation under an oxygen atmosphere was developed starting from carbonitriles and Grignard reagents via N-H imine intermediates. The present process is characterized by the following two-... One-Pot Synthesis of Pyrrolo[3,2-d]pyridazines and Pyrrole-2,3-diones via Zirconocene-Mediated Four-Component Coupling of Si-Tethered Diyne, Nitriles, and Azide [作者：ZHANG SHAOGUANG; ZHAO JING; ZHANG WENXIONG; XI ZHENFENG,期刊：Organic Letters, 页码：1626-1629 , 文章类型： Article，,卷期：2011年13-7] A one-pot synthesis of pyrrolo[3,2-d]pyridazine derivatives via zirconocene-mediated four-component coupling of one Si-tethered diyne, two nitriles, and one azide is reported. When TMSN3 was used, pyrrole-2,3-diones were... Base-Mediated Regio- and Stereoselective Intermolecular Addition of Alkynes to N-Heterocycles [作者：VERMA AKHILESH KUMAR; JOSHI MEGHA; SINGH VED PRAKASH,期刊：Organic Letters, 页码：1630-1633 , 文章类型： Article，,卷期：2011年13-7] The regio- and stereoselective addition of N-heterocycles to alkynes using KOH is reported. Formation of (Z)-isomers and their conversion to (E)-products were found to be dependent upon time as well as the choice cif bas... Sequential Oxidative Transformation of Tetraarylethylenes to 9,10-Diarylphenanthrenes and Dibenzo[g,p]chrysenes using DDQ as an Oxidant [作者：NAVALE TUSHAR S; THAKUR KHUSHABU; RATHORE RAJENDRA,期刊：Organic Letters, 页码：1634-1637 , 文章类型： Article，,卷期：2011年13-7] Tetraarylethylenes can be sequentially transformed into 9,10-diarylphenanthrenes and dibenzo[g,p]chrysenes using 1 and 2 equiv of DDQ, respectively, in CH2Cl2 containing methanesulfonic acid, in excellent yields. Efficie... Enzymatic Epoxide-Opening Cascades Catalyzed by a Pair of Epoxide Hydrolases in the Ionophore Polyether Biosynthesis [作者：MINAMI ATSUSHI; MIGITA AKIRA; INADA DAIKI; HOTTA KINYA; WATANABE KENJI; OGURI HIROKI; OIKAWA HIDEAKI,期刊：Organic Letters, 页码：1638-1641 , 文章类型： Article，,卷期：2011年13-7] Our recent findings of the first epoxide hydrolase Lsd19, involved in lasalocid A biosynthesis, led us to investigate a long-standing controversial issue on the mechanism of enzymatic epoxide-opening cascades. The site-d... Expedient and Practical Synthesis of CERT-Dependent Ceramide Trafficking Inhibitor HPA-12 and Its Analogues [作者：DURIS ANDREJ; WIESENGANGER TOMAS; MORAVCIKOVA DANIELA; BARAN PETER; KOZISEK JOZEF; DAICH ADAM; BERKES DUSAN,期刊：Organic Letters, 页码：1642-1645 , 文章类型： Article，,卷期：2011年13-7] The practical stereodivergent route to both syn- and anti-diastereomers of 1-substituted 3-aminobutane-1,4-diols based on the crystallization-induced asymmetric transformation (CIAT) approach was completed. This led to t...