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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61条记录   Isotope Effects and Heavy-Atom Tunneling in the Roush Allylboration of Aldehydes [作者：VETTICATT MATHEW J; SINGLETON DANIEL A,期刊：Organic Letters, 页码：2370-2373 , 文章类型： Article，,卷期：2012年14-9] Intermolecular C-13 kinetic isotope effects (KIEs) for the Roush allylboration of p-anisaldehyde were determined using a novel approach. The experimental C-13 KIEs fit qualitatively with the expected rate-limiting cyclic... Photooxidations of 2-(gamma,epsilon-Dihydroxyalkyl) Furans in Water: Synthesis of DE-Bicycles of the Pectenotoxins [作者：KOURIDAKI ANTONIA; MONTAGNON TAMSYN; TOFI MARIA; VASSILIKOGIANNAKIS GEORGIOS,期刊：Organic Letters, 页码：2374-2377 , 文章类型： Article，,卷期：2012年14-9] Photooxygenations of 2-(gamma,epsilon-dihydroxyalkyl) furans in H2O followed by in situ reduction and ketalization affords, in one synthetic operation, DE-bicyclic ketals of the pectenotoxins. Asymmetric Synthesis of Polysubstituted 4-Amino- and 3,4-Diaminochromanes with a Chiral Multifunctional Organocatalyst [作者：HOU WENDUAN; ZHENG BO; CHEN JUN; PENG YUNGUI,期刊：Organic Letters, 页码：2378-2381 , 文章类型： Article，,卷期：2012年14-9] A series of multifunctional catalysts with two chiral diaminocyclohexane units were developed and successfully applied in the asymmetric oxa-Michael-aza-Henry cascade reaction of salicylaldimines with nitroolefins. This ... Access to Spirocyclic Oxindoles via N-Heterocyclic Carbene-Catalyzed Reactions of Enals and Oxindole-Derived alpha,beta-Unsaturated Imines [作者：JIANG KUN; TIWARI BHOOPENDRA; CHI YONGGUI ROBIN,期刊：Organic Letters, 页码：2382-2385 , 文章类型： Article，,卷期：2012年14-9] A diastereoselective access to beta-lactam fused spirocyclic oxindoles and related compounds bearing all carbon spiro centers is described. This N-heterocyclic carbene-catalyzed process employed challenging beta,beta-dis... Reactions of Anionic Oxygen Nucleophiles with C-60 Revisited [作者：CHANG WEIWEI; LI ZONGJUN; YANG WEIWEI; GAO XIANG,期刊：Organic Letters, 页码：2386-2389 , 文章类型： Article，,卷期：2012年14-9] Reactions of C-60 with oxygen nucleophiles of HO- and CH3O- are revisited in PhCN in the presence of PhCH2Br. Different from previous results that such reactions lead to the formation of complex mixtures, well-structured... Ammosamide D, an Oxidatively Ring Opened Ammosamide Analog from a Marine-Derived Streptomyces variabilis [作者：PAN ENDE; JAMISON MATTHEW; YOUSUFUDDIN MUHAMMED; MACMILLAN JOHN B,期刊：Organic Letters, 页码：2390-2393 , 文章类型： Article，,卷期：2012年14-9] Ammosamide D (1), an oxidized analog of the ammosamide family, was isolated from a marine-derived Streptomyces variabilis. Pyrroloquinoline containing alkaloids are a growing class of natural products, with 1 being the f... Direct Palladium(II)-Catalyzed Synthesis of Arylamidines from Aryltrifluoroborates [作者：SAVMARKER JONAS; RYDFJORD JONAS; GISING JOHAN; ODELL LUKE R; LARHED MATS,期刊：Organic Letters, 页码：2394-2397 , 文章类型： Article，,卷期：2012年14-9] A fast and convenient synthesis of arylamidines starting from readily available potassium aryltrifluoroborates and cyanamides is reported. The coupling was achieved by Pd(II)-catalysis in a one step 20 min microwave prot... Copper(I)-Mediated Cascade Reactions: An Efficient Approach to the Synthesis of Functionalized Benzofuro[3,2-d]pyrimidines [作者：CHAO BO; LIN SHIJUN; MA QINGDONG; LU DONG; HU YOUHONG,期刊：Organic Letters, 页码：2398-2401 , 文章类型： Article，,卷期：2012年14-9] A novel cascade reaction was developed for the synthesis of diverse members of a series of benzofuro(3,2-d]pyrimidine derivatives. The process utilizes readily prepared 3-chlorochromenones and various commercially availa... Total Synthesis of Mycocyclosin [作者：COCHRANE JAMES R; WHITE JONATHAN M; WILLE UTA; HUTTON CRAIG A,期刊：Organic Letters, 页码：2402-2405 , 文章类型： Article，,卷期：2012年14-9] The first total synthesis of mycocyclosin, a diketopiperazine natural product isolated from M. tuberculosis, is described. While direct oxidative coupling of tyrosine phenolic groups was unsuccessful, construction of the... Two-Directional Desymmetrization by Double 1,4-Addition of Silicon and Boron Nucleophiles [作者：HARTMANN EDUARD; OESTREICH MARTIN,期刊：Organic Letters, 页码：2406-2409 , 文章类型： Article，,卷期：2012年14-9] The two-directional desymmetrization of prochiral precursors with alpha,beta-unsaturated branches by catalyst-controlled 1,4-addition of silicon and likewise boron nucleophiles allows for a general enantioselective acces... Palladium-Catalyzed Synthesis of 4-Oxaspiro[2.4]heptanes via Central Attack of Oxygen Nucleophiles to pi-Allylpalladium Intermediates [作者：SHINTANI RYO; ITO TOMOAKI; HAYASHI TAMIO,期刊：Organic Letters, 页码：2410-2413 , 文章类型： Article，,卷期：2012年14-9] A palladium-catalyzed decarboxylative cyclopropanation of gamma-methylidene-delta-valerolactones with aromatic aldehydes has been developed to give 4-oxaspiro[2.4]heptanes with high selectivity. The site of nucleophilic ... Direct and Selective Benzylic Oxidation of Alkylarenes via C-H Abstraction Using Alkali Metal Bromides [作者：MORIYAMA KATSUHIKO; TAKEMURA MISATO; TOGO HIDEO,期刊：Organic Letters, 页码：2414-2417 , 文章类型： Article，,卷期：2012年14-9] A direct benzylic oxidation of alkylarenes via C-H bond abstraction was developed using alkali metal bromides and oxidants under mild conditions. This reaction proceeded with excellent selectivity by thermal oxidation or... Synthesis of 3,5-Disubstituted Isoxazoles via Cope-Type Hydroamination of 1,3-Dialkynes [作者：WANG LIANGGUANG; YU XIAOQIANG; FENG XIUJUAN; BAO MING,期刊：Organic Letters, 页码：2418-2421 , 文章类型： Article，,卷期：2012年14-9] An efficient method for the synthesis of 3,5-disubstituted Isoxazoles is described. The reactions of 1,3-dialkynes with hydroxylamine proceeded smoothly in DMSO under mild reaction conditions to produce 3,5-disubstituted... Streptocarbazoles A and B, Two Novel Indolocarbazoles from the Marine-Derived Actinomycete Strain Streptomyces sp FMA [作者：FU PENG; YANG CHUNLI; WANG YI; LIU PEIPEI; MA YIMING; XU LEI; SU MINGBO; HONG KUI; ZHU WEIMING,期刊：Organic Letters, 页码：2422-2425 , 文章类型： Article，,卷期：2012年14-9] Streptocarbazoles A (1) and B (2), two novel indolocarbazoles featuring unprecedented cyclic N-glycosidic linkages between 1,3-carbon atoms of the glycosyl moiety and two indole nitrogen atoms of the indolocarbazole core... Fluoreno[4,3-c]fluorene: A Closed-Shell, Fully Conjugated Hydrocarbon [作者：ROSE BRADLEY D; VONNEGUT CHRIS L; ZAKHAROV LEV N; HALEY MICHAEL M,期刊：Organic Letters, 页码：2426-2429 , 文章类型： Article，,卷期：2012年14-9] The synthesis and optoelectronic properties of 24 pi-electron, formally antiaromatic 4,11-di-t-butyl-1,8-dimesltylfluoreno[4,3-c]fluorene (FF) are presented. The solid-state structure shows that the outer rings are aroma... Concise Synthesis of alpha-Trisubstituted Amines from Ketones using N-Methoxyamines (vol 48, pg 1820, 2012) [作者：KUROSAKI YUSUKE; SHIROKANE KENJI; OISHI TAKESHI; SATO TAKAAKI; CHIDA NORITAKA,期刊：Organic Letters, 页码：2430-2430 , 文章类型： Correction，,卷期：2012年14-9]