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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80条记录   Novel bioconjugates of aminolevulinic acid with vitamins. [作者：Vallinayagam, Ramakrishnan;Weber, Joanne;Neier, Reinhard;,期刊：Organic Letters, 页码：4453-4455 , 文章类型： 研究论文，,卷期：2008年10-20] 5-Aminolevulinic acid (ALA) and derivs. thereof have been successfully used in photodynamic cancer therapy (PDT). The synthesis of novel bioconjugates combining ALA with two lipophilic and one hydrophilic vitamins is re... N-Benzyl Aspartate Nitrones: Unprecedented Single-Step Synthesis and [3 + 2] Cycloaddition Reactions with Alkenes. [作者：Nguyen, Thanh Binh;Martel, Arnaud;Dhal, Robert;Dujardin, Gilles;,期刊：Organic Letters, 页码：4493-4496 , 文章类型： 研究论文，,卷期：2008年10-20] Compounds (More Than One Hetero Atom)) Section N-Benzyl aspartate nitrones, prepd. by addn. of N-benzylhydroxylamine to dialkyl acetylenedicarboxylates, underwent [3 + 2] thermal cycloaddn. with a wide range of alkenes t... Rearrangement of Spirocyclic Oxindoles with Lithium Amide Bases. [作者：Rousseau, Geraldine;Robert, Frederic;Schenk, Kurt;Landais, Yannick;,期刊：Organic Letters, 页码：4441-4444 , 文章类型： 研究论文，,卷期：2008年10-20] Spirocyclohexa-2,5-dienes I (R = H, OMe) were shown to rearrange at -40 癈, when treated with 1 equiv of LDA. Alkyl halides and aldehydes then reacted with the resulting phenanthridinone lithium enolate intermediates, wi... Silver-promoted domino Pd-catalyzed amination/direct arylation: access to polycyclic heteroaromatics. [作者：Bryan, Christopher S.;Lautens, Mark;,期刊：Organic Letters, 页码：4633-4636 , 文章类型： 研究论文，,卷期：2008年10-20] A series of tetracyclic and pentacyclic indole derivs. can be prepd. from readily available gem-dibromovinyl substrates in a single step by means of an efficient Pd-catalyzed domino Buchwald-Hartwig amination/direct aryl... A Phosphine-Catalyzed [3 + 2] Annulation Reaction of Modified Allylic Compounds and N-Tosylimines. [作者：Zheng, Suqing;Lu, Xiyan;,期刊：Organic Letters, 页码：4481-4484 , 文章类型： 研究论文，,卷期：2008年10-20] A phosphine-catalyzed annulation of modified allylic ylides with various arom. imines to form 3-pyrrolines, e.g., I, was developed. The presence of a substituent in the allylic compd. is crucial for this reaction. Witho... Addition Reactions of Iodomethyllithium to Imines. A Direct and Efficient Synthesis of Aziridines and Enantiopure Amino Aziridines. [作者：Concellon, Jose M.;Rodriguez-Solla, Humberto;Simal, Carmen;,期刊：Organic Letters, 页码：4457-4460 , 文章类型： 研究论文，,卷期：2008年10-20] An efficient and general synthesis of aziridines by the reaction of imines derived from p-toluenesulfonamides with in situ generated iodomethyllithium, with a simple and rapid exptl. protocol, is reported for the first t... Benzodichalcogenophenes with Perfluoroarene Termini. [作者：Wang, Yongfeng;Parkin, Sean R.;Watson, Mark D.;,期刊：Organic Letters, 页码：4421-4424 , 文章类型： 研究论文，,卷期：2008年10-20] Benzodichalcogenophenes are functionalized at their termini via SNAr reactions of their bismetalates with perfluoroarenes. The identities of X, Y, and W are varied to study the effects on LUMO energy levels and crystn. ... Tetrazoles are Potent Anion Recognition Elements That Emulate the Disfavored Anti Conformations of Carboxylic Acids. [作者：McKie, Aaron H.;Friedland, Sayuri;Hof, Fraser;,期刊：Organic Letters, 页码：4653-4655 , 文章类型： 研究论文，,卷期：2008年10-20] We report here the first study of the protonated, neutral form of tetrazoles as anion binding functional groups. Our studies reveal them to be capable of binding anions with extremely high potency in polar solns. In st... Isocyanurate Anion Radicals via Electron-Initiated Cycloaddition of Isocyanates. [作者：Peters, Steven J.;Klen, Joseph R.;Smart, Nathaniel C.;,期刊：Organic Letters, 页码：4521-4524 , 文章类型： 研究论文，,卷期：2008年10-20] Room temp. sodium metal redns. of alkyl isocyanates lead to the rapid electron-initiated formation of alkyl isocyanurate anion radicals, which exhibit EPR coupling to only two equiv. nitrogen. Redn. of 13C-enriched Et i... Electroreductive Intramolecular Coupling of 1-Indolealkanones. [作者：Kise, Naoki;Mano, Toshiyuki;Sakurai, Toshihiko;,期刊：Organic Letters, 页码：4617-4620 , 文章类型： 研究论文，,卷期：2008年10-20] and seven-membered trans-cyclized products stereospecifically. On the other hand, the electroredn. of 3-methoxycarbonyl-1-indolealkanones afforded mixts. of two diastereomers of the corresponding trans- and cis-cyclized... Manipulating Replication Processes within a Dynamic Covalent Framework. [作者：del Amo, Vicente;Slawin, Alexandra M. Z.;Philp, Douglas;,期刊：Organic Letters, 页码：4589-4592 , 文章类型： 研究论文，,卷期：2008年10-20] The reaction of an amine bearing an amidopyridine recognition site and an aldehyde bearing a carboxylic acid recognition site affords an imine that is capable of directing its own formation through a dynamic covalent rep... Origins of Stereoselectivity in the Oxido-Alkylidenation of Alkynes. [作者：Canterbury, Daniel P.;Frontier, Alison J.;Um, Joann M.;Cheong, Paul H.-Y.;Goldfeld, Dahlia A.;Huhn, Richard A.;Houk, K. N.;,期刊：Organic Letters, 页码：4597-4600 , 文章类型： 研究论文，,卷期：2008年10-20] A mild, convenient oxido-alkylidenation of alkynes is described. The three-step sequence involves the 1,3-dipolar cycloaddn. of a nitrone and an alkynoate, oxidn. of the resulting isoxazoline, and stereoselective extrus... Ynol Ethers from Dichloroenol Ethers: Mechanistic Elucidation Through 35Cl Labeling. [作者：Darses, Benjamin;Milet, Anne;Philouze, Christian;Greene, Andrew E.;Poisson, Jean-Francois;,期刊：Organic Letters, 页码：4445-4447 , 文章类型： 研究论文，,卷期：2008年10-20] The mechanism of ynol ether formation from dichloroenol ethers, a decades-old transformation, has been studied by exptl. and theor. techniques to det. the relative importance of the Fritsch-Buttenberg-Wichell rearrangeme... Salvileucalin B, A Novel Diterpenoid with an Unprecedented Rearranged Neoclerodane Skeleton from Salvia leucantha Cav. [作者：Aoyagi, Yutaka;Yamazaki, Akira;Nakatsugawa, Chihiro;Fukaya, Haruhiko;Takeya, Koichi;Kawauchi, Susumu;Izumi, Hiroshi;,期刊：Organic Letters, 页码：4429-4432 , 文章类型： 研究论文，,卷期：2008年10-20] neoclerodane skeleton, was isolated from the aerial parts of Salvia leucantha Cav. (Labiatae) along with salvileucalin A (1). The abs. structures were elucidated by spectroscopic anal., X-ray crystallog. anal., and vibr... (1-Naphthyl)(trifluoromethyl) O-Carboxy Anhydride as a Chiral Derivatizing Agent: Eclipsed Conformation Enforced by Hydrogen Bonding. [作者：Thillaye du Boullay, Olivier;Alba, Aurelie;Oukhatar, Fatima;Martin-Vaca, Blanca;Bourissou, Didier;,期刊：Organic Letters, 页码：4669-4672 , 文章类型： 研究论文，,卷期：2008年10-20] The prepn. of the (1-naphthyl)(trifluoromethyl) O-carboxy-anhydride 1 (I) and its use as a chiral derivatizing agent with several a-chiral primary amines are reported. The very large DdRS values obsd. in 1H NMR have bee... A Colorimetric Sensor Array for Detection and Identification of Sugars. [作者：Lim, Sung H.;Musto, Christopher J.;Park, Erwin;Zhong, Wenxuan;Suslick, Kenneth S.;,期刊：Organic Letters, 页码：4405-4408 , 文章类型： 研究论文，,卷期：2008年10-20] discriminate among a large no. of such similar analytes remain substantial scientific challenges. We report here a low-cost, simple colorimetric sensor array capable of identification and quantification of sugars and re...