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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59条记录   Photochemically Induced Radical Transformation of C(sp(3))-H Bonds to C(sp(3))-CN Bonds [作者：KAMIJO SHIN; HOSHIKAWA TAMAKI; INOUE MASAYUKI,期刊：Organic Letters, 页码：5928-5931 , 文章类型： Article，,卷期：2011年13-21] A general protocol for direct transformation of unreactive C(sp(3))-H bonds to C(sp(3))-CN bonds has been developed. The C-H activation was effected by photoexcited benzophenone, and the generated carbon radical was subs... Palladium(II)-Catalyzed Dehydrogenative Alkenylation of Cyclic Enaminones via the Fujiwara-Moritani Reaction [作者：YU YIYUN; NIPHAKIS MICAH J; GEORG GUNDA I,期刊：Organic Letters, 页码：5932-5935 , 文章类型： Article，,卷期：2011年13-21] A new Pd(II)-catalyzed dehydrogenative alkenylation reaction involving two alkenes was developed. A variety of nonaromatic, cyclic enaminones were successfully coupled to primary and secondary alkenes yielding a series o... Stereoselective Multimodal Transformations of Planar Chiral 9-Membered Diallylic Amides (vol 13, pg 4926, 2011) [作者：TOMOOKA KATSUHIKO; SUZUKI MASAKI; SHIMADA MAKI; NI RUNYAN; UEHARA KAZUHIRO,期刊：Organic Letters, 页码：5936-5936 , 文章类型： Correction，,卷期：2011年13-21] Oxidative C-H Homodimerization of Phenylacetamides [作者：PINTORI DIDIER G; GREANEY MICHAEL F,期刊：Organic Letters, 页码：5713-5715 , 文章类型： Article，,卷期：2011年13-21] A range of secondary and tertiary phenylacetamides undergo oxidative homodimerization to afford biaryls. The reaction proceeds under palladium catalysis in the presence of a copper cocatalyst and oxygen and is most effec... Synthesis of a Benzomacrolactone-Based Somatostatin Mimetic [作者：ZHOU JIAN; MATOS MARIECHRISTINE; MURPHY PAUL V,期刊：Organic Letters, 页码：5716-5719 , 文章类型： Article，,卷期：2011年13-21] The benzomacrolactone is a framework found in numerous natural products. The synthesis of an orthogonally functionalized benzomacrolactone from D-glucosamine and a salicylic acid derivative is described. This macrolacton... First Direct Evidence of Radical Intermediates in Samarium Diiodide Induced Cyclization by ESR Spectra [作者：SONO MASAKAZU; HANAMURA SHINICHI; FURUMAKI MIDORI; MURAI HISAO; TORI MOTOO,期刊：Organic Letters, 页码：5720-5723 , 文章类型： Article，,卷期：2011年13-21] The mechanism of samarium diiodide (SmI(2))-induced cyclization of alpha,beta-unsaturated esters and ketones to bicyclic compounds was examined using ESR spectroscopy. This is the first report of direct evidence of the r... Total Synthesis of Echinopines A and B: Exploiting a Bioinspired Late-Stage Intramolecular Cyclopropanation [作者：PEIXOTO PHILIPPE A; RICHARD JEANALEXANDRE; SEVERIN RENE; CHEN DAVID YK,期刊：Organic Letters, 页码：5724-5727 , 文章类型： Article，,卷期：2011年13-21] Total synthesis of echinopine A and B have been accomplished, based on a strategy that involved two transition-metal-mediated ene-yne cycloisomerizations. A modified Pd-catalyzed enyne cycloisomerization/intramolecular D... Copper(I)-Catalyzed Three Component Reaction of Sulfonyl Azide, Alkyne, and Nitrone Cycloaddition/Rearrangement Cascades: A Novel One-Step Synthesis of Imidazolidin-4-ones [作者：NAMITHARAN KAYAMBU; PITCHUMANI KASI,期刊：Organic Letters, 页码：5728-5731 , 文章类型： Article，,卷期：2011年13-21] A novel one-pot azide-alkyne/ketenimine-nitrone cycloaddition sequence that is induced by copper(I) and allows the transformation of sulfonyl azides, alkynes, and nitrones to highly substituted imidazolidin-4-ones is des... Development of a Formal Catalytic Asymmetric [4+2] Addition of Ethyl-2,3-butadienoate with Acyclic Enones [作者：ASHTEKAR KUMAR DILIP; STAPLES RICHARD J; BORHAN BABAK,期刊：Organic Letters, 页码：5732-5735 , 文章类型： Article，,卷期：2011年13-21] Allene esters are unique not only as excellent electrophiles but also because of their ability for subsequent reactivity after the initial nucleophilic attack. A mechanistically inspired cyclization using ethyl-2,3-butad... Synthesis of 2-Imidazolones and 2-Iminoimidazoles [作者：LIMA HEATHER M; LOVELY CARL J,期刊：Organic Letters, 页码：5736-5739 , 文章类型： Article，,卷期：2011年13-21] Convenient methods for the direct conversion of imidazolium salts to the corresponding 2-imidazolone or 2-imino imidazole derivatives have been developed. Treatment of the salt with commercial bleach leads to effective o... Enantioselective Syntheses of (+)-Sertraline and (+)-Indatraline Using Lithiation/Borylation-Protodeboronation Methodology [作者：ROESNER STEFAN; CASATEJADA JAVIER MANSILLA; ELFORD TIM G; SONAWANE RAVINDRA P; AGGARWAL VARINDER K,期刊：Organic Letters, 页码：5740-5743 , 文章类型： Article，,卷期：2011年13-21] The lithiation/borylation-protodeboronation of a homoallyl carbamate was applied to the synthesis of (+)-sertraline and (+)-indatraline. Due to the presence of the alkene, significant modifications of the methodology wer... Asymmetric Aziridination of Cyclic Enones Using Chiral Diamine Catalysts and Its Application to the Total Synthesis of (-)-Agelastatin A [作者：MENJO YASUHIRO; HAMAJIMA AKINARI; SASAKI NERI; HAMADA YASUMASA,期刊：Organic Letters, 页码：5744-5747 , 文章类型： Article，,卷期：2011年13-21] The asymmetric aziridination of cyclic enones with N-tosyloxycarbamates, using N-neopentyl 1,2-diphenylethylenediamine as a catalyst, and its application to the formal total synthesis of (-)-agelastatin A, using a one-po... Biomimetic Total Synthesis of Angelicoin A and B via a Palladium-Catalyzed Decarboxylative Prenylation-Aromatization Sequence [作者：ANDERSON KATIE; CALO FREDERICK; PFAFFENEDER TONI; WHITE ANDREW J P; BARRETT ANTHONY G M,期刊：Organic Letters, 页码：5748-5750 , 文章类型： Article，,卷期：2011年13-21] Five-step total syntheses of angelicoin A and B from 2,2,6-trimethyl-4-dioxinone are reported using late stage biomimetic aromatization reactions via diketo-dioxinones as intermediates. In addition, with angelicoin A, th... Catalytic Asymmetric Synthesis of (+)-Anthecotulide Using Enyne and Meyer-Schuster Rearrangements [作者：HODGSON DAVID M; TALBOT ERIC P A; CLARK BARRY P,期刊：Organic Letters, 页码：5751-5753 , 文章类型： Article，,卷期：2011年13-21] The bioactive sesquiterpene lactone (+)-anthecularin (1) is synthesized for the first time, in a six-step sequence devoid of protecting groups. The key transformations are a novel Rh(I)-catalyzed asymmetric enyne rearran... Enantioselective and Regioselective Indium(III)-Catalyzed Addition of Pyrroles to Isatins [作者：GUTIERREZ ELISA G; WONG CASEY J; SAHIN AZIZA H; FRANZ ANNALIESE K,期刊：Organic Letters, 页码：5754-5757 , 文章类型： Article，,卷期：2011年13-21] The indium(III)-catalyzed enantioselective and regioselective addition of pyrroles to isatins is described. The effects of metal and solvent on the reactivity and selectivity are compared and discussed, demonstrating tha... Asymmetric Synthesis of 3,4-Dihydrocoumarin Motif with an All-Carbon Quaternary Stereocenter via a Michael-Acetalization Sequence with Bifunctional Amine-thiourea Organocatalysts [作者：HONG BORCHERNG; KOTAME PRAKASH; LEE GENEHSIANG,期刊：Organic Letters, 页码：5758-5761 , 文章类型： Article，,卷期：2011年13-21] Asymmetric domino Michael acetalization reactions of 2-hydroxynitrostyrene and 2-oxocyclohexanecarbaldehyde with a bifunctional thioureatertiary-amine organocatalyst, e.g., the Takemoto catalyst, followed by oxidation pr...