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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56条记录   Calcium-Catalyzed Pictet-Spengler Reactions. [作者：Vanden Eynden, Matthew J.;Stambuli, James P.;,期刊：Organic Letters, 页码：5289-5291 , 文章类型： 研究论文，,卷期：2008年10-22] Pictet-Spengler reactions of m-tyramine and aldehydes produced tetrahydroisoquinolines, e.g., I, in the presence of a catalytic amt. of Ca[OCH(CF3)2]2. This reaction occurs with a variety of aryl, heteroaryl, and alkyl ... Sustainable Synthetic Methods: Domino Construction of Dihydropyridin-4-ones and b-Amino Esters in Aqueous Ethanol. [作者：Alaimo, Peter J.;O'Brien, Robert, III;Johnson, Adam W.;Slauson, Sarah R.;O'Brien, Jeannette M.;Tyson, Elizabeth L.;Marshall, Amanda-Lynn;Ottinger, Colleen E.;Chacon, Jon G.;Wallace, Lorien;Paulino, Corey Y.;Connell, Sarah;,期刊：Organic Letters, 页码：5111-5114 , 文章类型： 研究论文，,卷期：2008年10-22] Domino reactions were designed to allow the byproduct of an upstream reaction to be internally recycled to catalyze a downstream reaction in a one-pot tandem sequence. Nitroarene redn. by In generates an amine and InIII... Bismuth-Catalyzed Intramolecular Carbo-oxycarbonylation of 3-Alkynyl Esters. [作者：Komeyama, Kimihiro;Takahashi, Keita;Takaki, Ken;,期刊：Organic Letters, 页码：5119-5122 , 文章类型： 研究论文，,卷期：2008年10-22] Borderline metal complexes, esp. Bi(OTf)3, efficiently catalyze the carbo-oxycarbonylation of alkynyl esters to form multisubstituted lactones, e.g., I, in moderate to high yields. Au-Catalyzed Synthesis of 5,6-Dihydro-8H-indolizin-7-ones from N-(Pent-2-en-4-ynyl)-b-lactams. [作者：Peng, Yu;Yu, Meng;Zhang, Liming;,期刊：Organic Letters, 页码：5187-5190 , 文章类型： 研究论文，,卷期：2008年10-22] Au-catalyzed synthesis of 5,6-dihydro-8H-indolizin-7-ones, e.g, I, from readily available N-(pent-2-en-4-ynyl)-b-lactams is developed. In this reaction, a 5-exo-dig cyclization of the b-lactam nitrogen to the Au-activat... Synthesis of b-Lactams Bearing Functionalized Side Chains from a Readily Available Precursor. [作者：Lee, Myung-ryul;Stahl, Shannon S.;Gellman, Samuel H.;,期刊：Organic Letters, 页码：5317-5319 , 文章类型： 研究论文，,卷期：2008年10-22] The reaction of chlorosulfonyl isocyanate (CSI) with alkenes provides b-lactams in quantity, and the products have frequently been used for ring-opening polymn. to generate nylon-3 materials. Prior uses of this approach... Stereoselective Pincer-Complex Catalyzed C-H Functionalization of Benzyl Nitriles under Mild Conditions. An Efficient Route to b-Aminonitriles. [作者：Aydin, Juhanes;Conrad, Cathrin S.;Szabo, Kalman J.;,期刊：Organic Letters, 页码：5175-5178 , 文章类型： 研究论文，,卷期：2008年10-22] Derivatives, and Condensed Benzenoid Compounds) Section An efficient palladium pincer-complex catalyzed reaction has been developed for a-C-H bond functionalization of benzyl nitriles. The studied coupling reaction with... Diastereoselective Palladium-Catalyzed a-Arylation of 4-Substituted Cyclohexyl Esters. [作者：Bercot, Eric A.;Caille, Seb;Bostick, Tracy M.;Ranganathan, Krishnakumar;Jensen, Randy;Faul, Margaret M.;,期刊：Organic Letters, 页码：5251-5254 , 文章类型： 研究论文，,卷期：2008年10-22] cyclohexyl esters has been developed. The reaction proceeds at room temp. in the presence of [(t-Bu3P)PdBr]2 providing products in up to 37:1 dr. GaCl3- and TiCl4-Catalyzed Insertion of Isocyanides into a C-S Bond of Dithioacetals. [作者：Tobisu, Mamoru;Ito, Sana;Kitajima, Aki;Chatani, Naoto;,期刊：Organic Letters, 页码：5223-5225 , 文章类型： 研究论文，,卷期：2008年10-22] The insertion reaction of isocyanide into a C-S bond of dithioacetals is catalyzed by GaCl3 or TiCl4 to afford thioimidates contg. an a-alkylthio group. Balanced thiophilicity of these Lewis acids is crit. for efficient... Diazatetraester 1H-Pyrazole Crowns as Fluorescent Chemosensors for AMPH, METH, MDMA (Ecstasy), and Dopamine. [作者：Reviriego, Felipe;Navarro, Pilar;Garcia-Espana, Enrique;Albelda, M. Teresa;Frias, Juan C.;Domenech, Antonio;Yunta, Maria J. R.;Costa, Ruben;Orti, Enrique;,期刊：Organic Letters, 页码：5099-5102 , 文章类型： 研究论文，,卷期：2008年10-22] The synthesis and steady-state fluorescence studies on the interaction with AMPH, METH, MDMA, and DA of two diazatetraester pyrazole functions, in a water/ethanol 70:30 mixt. at physiol. pH, are described. Hg2+ Selective Fluorescent and Colorimetric Sensor: Its Crystal Structure and Application to Bioimaging. [作者：Chen, Xiaoqiang;Nam, Seong-Won;Jou, Min Jung;Kim, Youngmee;Kim, Sung-Jin;Park, Sungsu;Yoon, Juyoung;,期刊：Organic Letters, 页码：5235-5238 , 文章类型： 研究论文，,卷期：2008年10-22] A Hg2+-selective rhodamine 6G deriv. bearing thiolactone moiety was synthesized, and its crystal structure with Hg2+ is presented to explain the binding mode. In addn., highly selective "off-on"-type fluorescent change ... Rapid enantiomeric excess and concentration determination using simple racemic metal complexes. [作者：Nieto, Sonia;Lynch, Vincent M.;Anslyn, Eric V.;Kim, Hyunwoo;Chin, Jik;,期刊：Organic Letters, 页码：5167-5170 , 文章类型： 研究论文，,卷期：2008年10-22] Racemic-metal complexes were used to det. identity, enantiomeric excess, and concn. of chiral diamines using metal-to-ligand charge transfer bands in CD spectroscopy. It takes under just 2 min per sample to det. [G]t an... A 1,8-Naphthyridine-Based Fluorescent Chemodosimeter for the Rapid Detection of Zn2+ and Cu2+. [作者：Yu, Ming-Ming;Li, Zhan-Xian;Wei, Liu-He;Wei, Dong-Hui;Tang, Ming-Sheng;,期刊：Organic Letters, 页码：5115-5118 , 文章类型： 研究论文，,卷期：2008年10-22] A novel fluorescent chemodosimeter based on 1,8-naphthyridine exhibits high selectivity to Zn2+ and Cu2+. When 1-(7-acetamino-1,8-naphthyridyl)-2-(6-diacetaminopyridyl)ethene was mixed with CuCl2, hydrolysis of the acet... Tailoring b-Cyclodextrin for DNA Complexation and Delivery by Homogeneous Functionalization at the Secondary Face. [作者：Ortega-Caballero, Fernando;Ortiz Mellet, Carmen;Le Gourrierec, Loic;Guilloteau, Nicolas;Di Giorgio, Christophe;Vierling, Pierre;Defaye, Jacques;Garcia Fernandez, Jose M.;,期刊：Organic Letters, 页码：5143-5146 , 文章类型： 研究论文，,卷期：2008年10-22] An efficient general strategy for the incorporation of functional elements onto the secondary hydroxyl rim of b-cyclodextrin has been developed and applied to the synthesis of a novel series of C7-sym. homogeneous macrom... Switch peptide via Staudinger reaction. [作者：Nepomniaschiy, Natalia;Grimminger, Valerie;Cohen, Aviv;DiGiovanni, Saviana;Lashuel, Hilal A.;Brik, Ashraf;,期刊：Organic Letters, 页码：5243-5246 , 文章类型： 研究论文，,卷期：2008年10-22] A new transformation based on the Staudinger reaction is described, and its application in the design of a novel switch element to control peptide folding is demonstrated. We found that the azide switch is activated rap... Functionalized Analogues of an Unnatural Amino Acid that Mimics a Tripeptide b-Strand. [作者：Khasanova, Tatyana V.;Khakshoor, Omid;Nowick, James S.;,期刊：Organic Letters, 页码：5293-5296 , 文章类型： 研究论文，,卷期：2008年10-22] This paper introduces polar and hydrophobic variants of the unnatural amino acid Hao, which mimic the hydrogen-bonding functionality of one edge of a b-strand. In these amino acid variants I [R = (CH2)3NHBoc, CH2CO2Bu-t... An Ireland-Claisen approach to b-alkoxy a-amino acids. [作者：Tellam, James P.;Kociok-Kohn, Gabriele;Carbery, David R.;,期刊：Organic Letters, 页码：5199-5202 , 文章类型： 研究论文，,卷期：2008年10-22] A diastereoselective Ireland-Claisen approach to b-alkoxy a-amino acid esters is reported. Amino acid esters of enol ethereal allylic alcs. undergo facile syn-selective [3,3]-sigmatropic rearrangement via silyl ketene a...