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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53条记录   Fluorescent chemosensor for chloroalkanes. [作者：Lee, Jung-Jae;Noll, Bruce C.;Smith, Bradley D.;,期刊：Organic Letters, 页码：1735-1738 , 文章类型： 研究论文，,卷期：2008年10-9] Two structurally related macrocyclic amines with naphthalene groups (I, R=CH2, CO) act as fluorescent dosimeters for reactive chloroalkanes, including the common industrial solvent dichloromethane. The macrocyclic struc... Gas-Phase Stereoselective Binding to Mn/Salen Catalysts. [作者：Fagin, Adelaide E.;Wang, Guoping;Lau, Michel C.;Gronert, Scott;,期刊：Organic Letters, 页码：1771-1773 , 文章类型： 研究论文，,卷期：2008年10-9] Gas-phase equil. measurements were used to det. the stereoselectivity of binding the enantiomers of 1-phenylethanol to Mn/salen asym. epoxidn. catalysts. There is significant selectivity in the gas-phase binding, and th... An oxidative carbon-carbon bond formation system in cycloalkane-based thermomorphic multiphase solution. [作者：Kim, Shokaku;Noda, Satoko;Hayashi, Kanako;Chiba, Kazuhiro;,期刊：Organic Letters, 页码：1827-1829 , 文章类型： 研究论文，,卷期：2008年10-9] A selective anodic oxidn. system in which a carbocation intermediate is generated exclusively using a temp.-controlled multiphase soln. to sep. the different stages of the reaction from each other and from the products i... Diastereoselective Synthesis of d-Amino acids through Domino Ireland-Claisen Rearrangement and Michael Addition. [作者：Garrido, Narciso M.;Garcia, Mercedes;Diez, David;Sanchez, M. Rosa;Sanz, F.;Urones, Julio G.;,期刊：Organic Letters, 页码：1687-1690 , 文章类型： 研究论文，,卷期：2008年10-9] rearrangement and asym. Michael addn. - is described. A protocol starting from Baylis-Hillman adducts, e.g. R1CH:C(CH2OAc)CO2R2 (R1 = Ph, 3,4-(MeO)2C6H3, 3-pyridinyl, R2 = Me, tert-Bu), using a chiral lithium amide affo... An Efficient Total Synthesis of (?-Stemonamine. [作者：Zhao, Yu-Ming;Gu, Peiming;Tu, Yong-Qiang;Fan, Chun-An;Zhang, Qingwei;,期刊：Organic Letters, 页码：1763-1766 , 文章类型： 研究论文，,卷期：2008年10-9] has been developed on the basis of a key TiCl4 promoted tandem Semipinacol rearrangement/Schmidt reaction and a Dieckmann condensation reaction. Rhodium-Catalyzed Anti Selective Cross-Addition of Bis(trimethylsilyl)acetylene to Diarylacetylenes via Carbon-Silicon Bond Cleavage. [作者：Horita, Akinobu;Tsurugi, Hayato;Satoh, Tetsuya;Miura, Masahiro;,期刊：Organic Letters, 页码：1751-1754 , 文章类型： 研究论文，,卷期：2008年10-9] The addn. of bis(trimethylsilyl)acetylene to diarylacetylenes RCYCR (R = Ph, 4-ClC6H4, 4-MeOC6H4, 2-thienyl) proceeds efficiently and selectively in a formal anti fashion in the presence of [Rh(OH)(cod)]2/bisphosphine an... The General Synthesis and Trapping of 3-Substituted 1-Chlorocyclopropenes. [作者：Lee, Gon-Ann;Chen, Ko Chou;,期刊：Organic Letters, 页码：1843-1845 , 文章类型： 研究论文，,卷期：2008年10-9] Treatment of 1-bromo-2,2-dichloro-3-(trimethylsilyl)cyclopropane (I) with CsF in refluxing THF gave a chlorocyclopropenyl cation, which reacted with various nucleophiles to generate in situ 3-monosubstituted 1-chlorocycl... Bronsted-acid-catalyzed activation of nitroalkanes: a direct enantioselective aza-Henry reaction. [作者：Rueping, Magnus;Antonchick, Andrey P.;,期刊：Organic Letters, 页码：1731-1734 , 文章类型： 研究论文，,卷期：2008年10-9] A direct asym. organocatalytic aza-Henry reaction has been developed. A bifuctional Bronsted-acid-catalyzed activation of nitroalkanes provided an efficient access to a,b-diamino acids with high dia- and enantioselectiv... Mo-Au Combo Catalysis for Rapid 1,3-Rearrangement of Propargyl Alcohols into a,b-Unsaturated Carbonyl Compounds. [作者：Egi, Masahiro;Yamaguchi, Yoshiko;Fujiwara, Noboru;Akai, Shuji;,期刊：Organic Letters, 页码：1867-1870 , 文章类型： 研究论文，,卷期：2008年10-9] The combination of Mo and cationic Au catalysts dramatically accelerated the rearrangement of diverse propargyl alcs., which includes a short reaction time, mild conditions, and high product yields. A practical applicati... Asymmetric direct aldol reactions of pyruvic derivatives. [作者：Luo, Sanzhong;Xu, Hui;Chen, Liujuan;Cheng, Jin-Pei;,期刊：Organic Letters, 页码：1775-1778 , 文章类型： 研究论文，,卷期：2008年10-9] as I/TfOH, can effectively catalyze the direct aldol reactions of pyruvic derivs. with aldehydes. The reaction proceeded with excellent syn diastereoselectivities and enantioselectivities, thus functionally mimicking th... Novel Bifunctional Chiral Thiourea Catalyzed Highly Enantioselective aza-Henry Reaction. [作者：Wang, Chungui;Zhou, Zhenghong;Tang, Chuchi;,期刊：Organic Letters, 页码：1707-1710 , 文章类型： 研究论文，,卷期：2008年10-9] A novel bifunctional chiral thiourea organocatalyst bearing a glycosyl scaffold and a tertiary amino group was synthesized starting from readily available alpha-D-glucose. This thiourea was proven to be an effective org... Structure and semisynthesis of platensimide A, produced by Streptomyces platensis. [作者：Herath, Kithsiri B.;Zhang, Chaowei;Jayasuriya, Hiranthi;Ondeyka, John G.;Zink, Deborah L.;Burgess, Bruce;Wang, Jun;Singh, Sheo B.;,期刊：Organic Letters, 页码：1699-1702 , 文章类型： 研究论文，,卷期：2008年10-9] Platensimycin and platencin are novel natural product antibiotics that inhibit bacterial growth by inhibiting condensing enzymes FabF and FabF/FabH of fatty acid biosynthesis pathways, resp. Continued search for the nat... Oxidation of a Biomarker for Phenol Carcinogen Exposure: Expanding the Redox Chemistry of 2'-Deoxyguanosine. [作者：Weishar, Jennifer L.;McLaughlin, Christopher K.;Baker, Michael;Gabryelski, Wojciech;Manderville, Richard A.;,期刊：Organic Letters, 页码：1839-1842 , 文章类型： 研究论文，,卷期：2008年10-9] A biomarker for phenolic carcinogen exposure, 8-(4''-hydroxyphenyl)-2'-deoxyguanosine, has been found to undergo oxidative coupling in the presence of Na2IrCl6 to afford ortho-ortho C-C-coupled polyphenols through the in... Total synthesis of (-)-kainic acid via intramolecular Michael addition: a second-generation route. [作者：Sakaguchi, Hiroshi;Tokuyama, Hidetoshi;Fukuyama, Tohru;,期刊：Organic Letters, 页码：1711-1714 , 文章类型： 研究论文，,卷期：2008年10-9] A total synthesis of (-)-kainic acid (I) starting from the com. available 2-azetidinone is described. The key d-lactone intermediate was concisely prepd. from the com. available azetidinone through the Reformatsky-type ... Efficient Synthesis of 2-(Trifluoromethyl)nicotinic Acid Derivatives from Simple Fluorinated Precursors. [作者：Kiss, Laszlo E.;Ferreira, Humberto S.;Learmonth, David A.;,期刊：Organic Letters, 页码：1835-1837 , 文章类型： 研究论文，,卷期：2008年10-9] Novel routes to 2-trifluoromethyl-nicotinic acid derivs. have been developed involving synthesis of the pyridine ring. These pyridyl compds. serve as key intermediates in the manuf. of the recently discovered COMT inhib... Enantioselective Synthesis of Iridal, the Parent Molecule of the Iridal Triterpenoid Class. [作者：Corbu, Andrei;Aquino, Maurizio;Pratap, T. V.;Retailleau, Pascal;Arseniyadis, Simeon;,期刊：Organic Letters, 页码：1787-1790 , 文章类型： 研究论文，,卷期：2008年10-9] approach that allows access for several representatives of the iridal family as well as diversely substituted analogs. The success of the proposed synthetic plan depends upon the effortless stereoselective establishment...