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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71条记录   Three-Component Synthesis of Polysubstituted Pyrroles from alpha-Diazoketones, Nitroalkenes, and Amines [作者：HONG DENG; ZHU YUANXUN; LI YAO; LIN XUFENG; LU PING; WANG YANGUANG,期刊：Organic Letters, 页码：4668-4671 , 文章类型： Article，,卷期：2011年13-17] Polysubstituted pyrroles are regiospecifically synthesized via the copper-catalyzed three-component reaction of alpha-diazoketones, nitroalkenes, and amines under aerobic conditions. The cascade process Involves an N-H i... Iminium Ion Cascade Reaction in the Total Synthesis of (+)-Vincadifformine [作者：PANDEY GANESH; KUMARA PRASANNA C,期刊：Organic Letters, 页码：4672-4675 , 文章类型： Article，,卷期：2011年13-17] An iminium ion triggered cascade reaction is described in the total synthesis of (+)-vincadifformine by the coupling of 3,3-substituted tetrahydropyridine and indole derivative. The strategy allows simultaneous construct... Silver-Catalyzed Intramolecular Chloroamination of Allenes: Easy Access to Functionalized 3-Pyrroline and Pyrrole Derivatives [作者：SAI MASAHIRO; MATSUBARA SEIJIRO,期刊：Organic Letters, 页码：4676-4679 , 文章类型： Article，,卷期：2011年13-17] A 1,10-phenanthroline-ligated cationic silver complex allows the intramolecular chloroamination of allenes with N-chlorosuccinimide using 2,6-lutidine as a base. This process proceeds under mild conditions and can tolera... The Catalytic Asymmetric 1,3-Dipolar Cycloaddition of Ynones with Azomethine Ylides [作者：SHI FENG; LUO SHIWEI; TAO ZHONGLIN; HE LONG; YU JIE; TU SHUJIANG; GONG LIUZHU,期刊：Organic Letters, 页码：4680-4683 , 文章类型： Article，,卷期：2011年13-17] The first catalytic asymmetric 1,3-dipolar cycloaddition of electron-deficient carbon carbon triple bonds with azomethine ylides has been established. This reaction provides an unprecedented approach to access novel 2,5-... Copper-Catalyzed beta-Boration of alpha,beta-Unsaturated Carbonyl Compounds with Tetrahydroxydiborane [作者：MOLANDER GARY A; MCKEE SILAS A,期刊：Organic Letters, 页码：4684-4687 , 文章类型： Article，,卷期：2011年13-17] The copper-catalyzed beta-boration of alpha,beta-unsaturated carbonyl compounds with tetrahydroxydiborane has been developed. This diboron reagent allows direct, efficient access to boronic acids and their derivatives. P... Tetrathiafulvalenylallene: A New Class of Donor Molecules Having Strong Chiroptical Properties in Neutral and Doped States [作者：HASEGAWA MASASHI; SONE YASUTO; IWATA SEIYA; MATSUZAWA HIDEYO; MAZAKI YASUHIRO,期刊：Organic Letters, 页码：4688-4691 , 文章类型： Article，,卷期：2011年13-17] A chiral tetrathiafulvalene (TTF) dimer bridged by an allene framework (1) was synthesized. An X-ray analysis of 1 revealed an effective conjugation between TTF and the allene backbone. Allene 1 was resolved into both en... Ir(I)-Catalyzed Enantioselective Secondary sp(3) C-H Bond Activation of 2-(Alkylamino)pyridines with Alkenes [作者：PAN SHIGUANG; ENDO KOHEI; SHIBATA TAKANORI,期刊：Organic Letters, 页码：4692-4695 , 文章类型： Article，,卷期：2011年13-17] A cationic Ir(1)-tolBINAP complex catalyzed an enantioselective C-C bond formation initiated by secondary sp(3) C-H bond cleavage adjacent to a nitrogen atom. The reaction of 2-(alkylamino)pyridines with various alkenes ... General and Expedient Synthesis of 1,4-Dioxygenated Xanthones [作者：NICHOLS ALEXANDER L; ZHANG PATRICIA; MARTIN STEPHEN F,期刊：Organic Letters, 页码：4696-4699 , 文章类型： Article，,卷期：2011年13-17] A facile entry to 1,4-dioxygenated xanthones having a variety of substitution patterns and substituents was developed that features a novel application of the Moore cyclization using substrates that were readily assemble... Total Synthesis of NW-G01, a Cyclic Hexapeptide Antibiotic, and 34-epi-NW-G01 [作者：SHIBAHARA SETSUYA; MATSUBARA TAKAAKI; TAKAHASHI KEISUKE; ISHIHARA JUN; HATAKEYAMA SUSUMI,期刊：Organic Letters, 页码：4700-4703 , 文章类型： Article，,卷期：2011年13-17] NW-G01, a cyclic hezapeptide antibiotic, and 34-epi-NW-G01 were synthesized by the highly stereoselective convergent approach for the first time, thereby unambiguously determining the absolute structure of NW-G01. Convergent Synthesis of the HIJKLM Ring System of Ciguatoxin CTX3C [作者：TAKAMURA HIROYOSHI; NISHIUMA NAOKI; ABE TAKASHI; KADOTA ISAO,期刊：Organic Letters, 页码：4704-4707 , 文章类型： Article，,卷期：2011年13-17] The HIJKLM ring system of ciguatozin CTX3C was synthesized in a convergent manner. The key steps were a conjugate addition/alkylation sequence, spiroacetalization, intramolecular allylation, ring-closing metathesis, and ... Enantioselective Diels-Alder Reactions of Enals and Alkylidene Diketones Catalyzed by N-Heterocyclic Carbenes [作者：FANG XINQIANG; CHEN XINGKUAN; CHI YONGGUI ROBIN,期刊：Organic Letters, 页码：4708-4711 , 文章类型： Article，,卷期：2011年13-17] An electron-withdrawing group was introduced to the a-position of chalcones, and the resulting alkylidene diketones showed new reactivities with enals under the catalysis of N-heterocyclic carbenes (NHCs). Selective acti... Formal Synthesis of (+)-Sorangicin A [作者：CRIMMINS MICHAEL T; HALEY MATTHEW W; OBRYAN ELIZABETH A,期刊：Organic Letters, 页码：4712-4715 , 文章类型： Article，,卷期：2011年13-17] The formal synthesis of (+)-sorangicin A was completed by two independent routes. Both approaches feature a cross metathesis reaction to form the C29-C30 bond to arrive at the bicyclic ether/tetrahydropyran fragment. For... A Near-Infrared Fluorescence Turn-On Sensor for Sulfide Anions [作者：CAO XIAOWEI; LIN WEIYING; HE LONGWEI,期刊：Organic Letters, 页码：4716-4719 , 文章类型： Article，,卷期：2011年13-17] The first NIR fluorescent sensor for sulfide anions was constructed based on the displacement approach. The sensing ensemble is composed of a cyanine dye, a piperazine linker, an 8-aminoquinoline ligand, and copper. The ... A Useful Synthetic Equivalent of a Hydroxyacetone Enolate [作者：BIGOVIC MILJAN; MASLAK VESELIN; TOKICVUJOSEVIC ZORANA; DIVJAKOVIC VLADIMIR; SAICIC RADOMIR N,期刊：Organic Letters, 页码：4720-4723 , 文章类型： Article，,卷期：2011年13-17] Indium promoted allyiation of carbonyl compounds with 4-(bromomethyl)-1,3-dioxol-2-one diastereoselectively affords and-alpha,beta-dihydroxyketones, protected as enol carbonates. These initial products can be deprotected... Syntheses and Properties of 1,6 and 1,7 Perylene Diimides and Tetracarboxylic Dianhydrides [作者：HANDA NISHA V; MENDOZA KAYLA D; SHIRTCLIFF LAURA D,期刊：Organic Letters, 页码：4724-4727 , 文章类型： Article，,卷期：2011年13-17] Via Sonogashira cross-coupling with different alkynes, 1,6 and 1,7 peryiene dilmides (PDIs) and perylene tetracarboxylic dianhydrides (PTCDs) were synthesized from the corresponding regioisomeric mixture of 1,6/1,7-dibro... Stereoselective Synthesis of Substituted 1,3-Oxazolidines via Pd-Catalyzed Carboamination Reactions of O-Vinyl-1, 2-Amino Alcohols [作者：WARD AMANDA F; WOLFE JOHN P,期刊：Organic Letters, 页码：4728-4731 , 文章类型： Article，,卷期：2011年13-17] The stereoselective synthesis of 2,4- and 2,5-disubstituted 1,3-oxazolidines Is accomplished via Pd-catalyzed carboamination of O-vinyl-1, 2-amino alcohol derivatives. The transformations generate cis-disubstituted produ...