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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83条记录   Synthesis of Coumarin/Phenanthridine-Fused Heterocycles and Their Photochemical and Thermochromic Properties [作者：CHEN JIUNJIA; LI KUANTING; YANG DINGYAH,期刊：Organic Letters, 页码：1658-1661 , 文章类型： Article，,卷期：2011年13-7] Four coumarin and phenanthridine-fused heterocycles were efficiently synthesized using base-mediated annulation of N-alkylquinolinium iodide and coumarin as a key step. One compound is found to be sensitive to light and ... N-(Heteroarenesulfonyl)prolinamides-Catalyzed Aldol Reaction between Acetone and Aryl Trihalomethyl Ketones [作者：HARA NORIYUKI; TAMURA RYOTA; FUNAHASHI YASUHIRO; NAKAMURA SHUICHI,期刊：Organic Letters, 页码：1662-1665 , 文章类型： Article，,卷期：2011年13-7] Enantiomerically enriched trihalomethyl-substituted alcohols having a quaternary chiral carbon center can be prepared by the catalytic enantioselective cross-aldol reaction of acetone with trihalomethyl ketones by using ... Synthesis of Chiral N-Heterocyclic Carbene Ligands with Rigid Backbones and Application to the Palladium-Catalyzed Enantioselective Intramolecular alpha-Arylation of Amides [作者：LIU LANTAO; ISHIDA NAOKI; ASHIDA SHINJI; MURAKAMI MASAHIRO,期刊：Organic Letters, 页码：1666-1669 , 文章类型： Article，,卷期：2011年13-7] Chiral N-heterocyclic carbene (NHC) ligands having a 2,2'-bisquinoline-based C-2 symmetric skeleton were developed. The ligands exhibited good enantioselectivity in palladium-catalyzed intramolecular alpha-arylation of a... Synthesis and Tautomerization of Benzo[cd]azulen-3-ones [作者：AUMULLER INGO B; YLIKAUHALUOMA JARI,期刊：Organic Letters, 页码：1670-1673 , 文章类型： Article，,卷期：2011年13-7] This report describes a type of tautomerization reaction that proceeds via isomerization of pi-bonds across the azulene moieties of tricyclic benzo[cd]azulen-3-ones. The reaction mechanism shows similarities to an elimin... Iron(II)-Catalyzed Oxidation of sp(3) C-H Bonds Adjacent to a Nitrogen Atom of Unprotected Arylureas with tert-Butyl Hydroperoxide in Water [作者：WEI YING; DING HONGQIAN; LIN SHAOXIA; LIANG FUSHUN,期刊：Organic Letters, 页码：1674-1677 , 文章类型： Article，,卷期：2011年13-7] With a FeSO4/TBHP system in water, direct oxidation of sp(3) C-H bonds adjacent to nitrogen of arylureas to give both unprecedented tert-butoxylated and hydroxylated products 2 was revealed. Under elevated temperatures, ... Anodic Coupling Reactions: Exploring the Generality of Curtin-Hammett Controlled Reactions [作者：REDDEN ALISON; MOELLER KEVIN D,期刊：Organic Letters, 页码：1678-1681 , 文章类型： Article，,卷期：2011年13-7] Intramolecular anodic olefin coupling reactions can be compatible with the presence of dithioketal protecting groups even though the dithioketal oxidizes at a lower potential than either of the groups participating in th... A "Click and Activate" Approach in One-Pot Synthesis of a Triazolyl-Pyridazinone Library [作者：QIAN WENYUAN; WINTERNHEIMER DAVID; ALLEN JENNIFER,期刊：Organic Letters, 页码：1682-1685 , 文章类型： Article，,卷期：2011年13-7] A "click and activate" strategy was designed and executed in a four-component, stepwise condensation that led to a trisubstituted triazolyl-pyridazinone library. This one-pot process included regioselective azide substit... Synthesis and Functionalization of 3-Alkylidene-1,2-diazetidines Using Transition Metal Catalysis [作者：BROWN MICHAEL J; CLARKSON GUY J; INGLIS GRAHAM G; SHIPMAN MICHAEL,期刊：Organic Letters, 页码：1686-1689 , 文章类型： Article，,卷期：2011年13-7] An efficient two-step synthesis of a wide range of 3-methylene-1,2-diazetidines has been developed through application of a Cu(I)-catalyzed 4-exo ring closure. The double bond of this new class of strained heterocycle ca... Pd-Catalyzed alpha-Arylation of Nitriles and Esters and gamma-Arylation of Unsaturated Nitriles with TMPZnCl center dot LiCl [作者：DUEZ STEPHANIE; BERNHARDT SEBASTIAN; HEPPEKAUSEN JOHANNES; FLEMING FRASER F; KNOCHER PAUL,期刊：Organic Letters, 页码：1690-1693 , 文章类型： Article，,卷期：2011年13-7] Using TMPZnCl center dot"LiCl as a kinetically highly active base, nitriles and esters undergo a Pd-catalyzed alpha-arylation under mild conditions. Remarkably, in the case of alpha,beta or beta,gamma-unsaturated nitrile... Synthesis and Cross-Coupling of Sulfonamidomethyltrifluoroborates [作者：MOLANDER GARY A; FLEURYBREGEOT NICOLAS; HIEBEL MARIEAUDE,期刊：Organic Letters, 页码：1694-1697 , 文章类型： Article，,卷期：2011年13-7] Sulfonamidomethyltrifluoroborates were successfully synthesized and cross-coupled with a wide range of aryl and heteroaryl chlorides, allowing the construction of a sulfonamidomethyl aryl linkage through a new disconnect... Efficient One-to-One Coupling of Easily Available 1,3-Dienes with Carbon Dioxide [作者：TAKAYA JUN; SASANO KOTA; IWASAWA NOBUHARU,期刊：Organic Letters, 页码：1698-1701 , 文章类型： Article，,卷期：2011年13-7] An efficient one-to-one coupling reaction of atmospheric pressure carbon dioxide with 1,3-dienes is realized for the first time through PSiP-pincer type palladium-catalyzed hydrocarboxylation. The reaction is applicable ... Distinct Chemoselectivities in the Platinum-Catalyzed 1,2-Carboalkoxylations of 5-Alkoxypent-1-yn-3-ol Derivatives [作者：TING CHUNMING; WANG CHIOUDONG; CHAUDHURI RUPSHA; LIU RAISHUNG,期刊：Organic Letters, 页码：1702-1705 , 文章类型： Article，,卷期：2011年13-7] Two distinct Pt-catalyzed carboalkoxylations of alkynes are reported. The cycloisomerization of 5-alkoxypent-1-yn-3-ol derivatives 5 produces 2,6dioxabicyclo[3.1.0]hexanes 6; the mechanism is postulated to involve a hydr... Lewis Acid Catalyzed Benzylic C-H Bond Functionalization of Azaarenes: Addition to Enones [作者：KOMAI HIROTOMO; YOSHINO TATSUHIKO; MATSUNAGA SHIGEKI; KANAI MOTOMU,期刊：Organic Letters, 页码：1706-1709 , 文章类型： Article，,卷期：2011年13-7] A Lewis acid catalyzed benzylic C-H bond functionalization of alkyl-substituted azaarenes is described. Sc(OTf)(3) and Y(OTf)(3) promoted the direct addition of alkyl-substituted azaarenes and benzoxazole to enones and a... Iodocyclization and Prins-Type Macrocyclization: An Efficient Formal Synthesis of Leucascandrolide A [作者：YADAV J S; PATTANAYAK MANAS R; DAS PRAGNA P; MOHAPATRA DEBENDRA K,期刊：Organic Letters, 页码：1710-1713 , 文章类型： Article，,卷期：2011年13-7] The formal total synthesis of leucascandrolide A has been achieved in 20 steps from a known epoxide with an overall yield of 11.5% following a recently developed strategy for the construction of trans-2,6-disubstituted-3... Facile Synthesis of 5,10,15-Hexaaryl Truxenes: Structure and Properties [作者：KAO MINTZU; CHEN JIAHONG; CHU YINGYING; TSENG KUOPI; HSU CHIAHUEI; WONG KENTSUNG; CHANG CHEWEI; HSU CHAOPING; LIU YINHUNG,期刊：Organic Letters, 页码：1714-1717 , 文章类型： Article，,卷期：2011年13-7] A new synthesis of 5,10,15-hexaaryltruxene derivatives has been developed. Experimental observations and theoretical calculations confirmed that the presence of aryl substituents on the sp(3)-hybridized bridge carbon ato... Intramolecular Cyclization of in Situ Generated Adducts Formed between Thioamide Dianions and Thioformamides Leading to Generation of 5-Amino-2-thiazolines and 5-Aminothiazoles, and Their Fluorescence Properties [作者：MURAI TOSHIAKI; HORI FUMIHIKO; MARUYAMA TOSHIFUMI,期刊：Organic Letters, 页码：1718-1721 , 文章类型： Article，,卷期：2011年13-7] Reactions of thioamide dianions, derived from secondary N-arylmethyl thioamides using Bat, with thioformamides followed by the addition of iodine to yield 5-amino-2-thiazolines are described. Treatment of the 5-amino-2-t...