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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64条记录   An efficient copper-aluminum hydrotalcite catalyst for asymmetric hydrosilylation of ketones at room temperature. [作者：Kantam, M. Lakshmi;Laha, Soumi;Yadav, Jagjit;Likhar, Pravin R.;Sreedhar, Bojja;Jha, Shailendra;Bhargava, Suresh;Udayakiran, M.;Jagadeesh, B.;,期刊：Organic Letters, 页码：2979-2982 , 文章类型： 研究论文，,卷期：2008年10-14] A catalyst system consisting of a copper-aluminum hydrotalcite-chiral diphosphine ligand effects asym. hydrosilylation of several ketones, using polymethylhydrosiloxane (PMHS) as the stoichiometric reducing agent at room... Synthesis of sultam scaffolds via intramolecular oxa-Michael and diastereoselective Baylis-Hillman reactions. [作者：Zhou, Aihua;Hanson, Paul R.;,期刊：Organic Letters, 页码：2951-2954 , 文章类型： 研究论文，,卷期：2008年10-14] A divergent synthetic approach to sultams, e.g., I and II, utilizing intramol. oxa-Michael and Baylis-Hillman reactions of readily prepd. vinyl sulfonamides and suitably protected amino alcs., is reported. A variety of ... Copper(II)-Catalyzed Exo and Enantioselective Cycloadditions of Azomethine Imines. [作者：Sibi, Mukund P.;Rane, Digamber;Stanley, Levi M.;Soeta, Takahiro;,期刊：Organic Letters, 页码：2971-2974 , 文章类型： 研究论文，,卷期：2008年10-14] A strategy for exo and enantioselective 1,3-dipolar cycloaddn. of azomethine imines to 2-acryloyl-3-pyrazolidinone is described. The corresponding cycloadducts, e.g., I, are isolated with high diastereoselectivities (up... Synthesis of 1(2H)-Isoquinolones by the Nickel-Catalyzed Denitrogenative Alkyne Insertion of 1,2,3-Benzotriazin-4(3H)-ones. [作者：Miura, Tomoya;Yamauchi, Motoshi;Murakami, Masahiro;,期刊：Organic Letters, 页码：3085-3088 , 文章类型： 研究论文，,卷期：2008年10-14] 1,2,3-Benzotriazin-4(3H)-ones reacted with internal and terminal alkynes in the presence of a nickel(0)/phosphine catalyst to give a wide range of substituted 1(2H)-isoquinolones, e.g., I (R1 = Me, Bn, Ph, 4-Me-Ph, 4-MeO... Diastereoselective cobalt-catalyzed alkylative aldol cyclizations using trialkylaluminum reagents. [作者：Rudkin, Mairi E.;Joensuu, Pekka M.;MacLachlan, William S.;Lam, Hon Wai;,期刊：Organic Letters, 页码：2939-2942 , 文章类型： 研究论文，,卷期：2008年10-14] Co(acac)2?H2O serves as an effective precatalyst for alkylative aldol cyclizations of a,b-unsatd. amides with ketones using trialkylaluminum reagents. These reactions provide b-hydroxylactams, e.g., I, contg. three cont... Electrophile-Induced Dearomatizing Spirocyclization of N-Arylisonicotinamides: A Route to Spirocyclic Piperidines. [作者：Arnott, Gareth;Brice, Heloise;Clayden, Jonathan;Blaney, Emma;,期刊：Organic Letters, 页码：3089-3092 , 文章类型： 研究论文，,卷期：2008年10-14] Treatment of N-arylisonicotinamides with trifluoromethanesulfonic anhydride triggers intramol. nucleophilic attack of the aryl ring on the 4-position of the pyridinium intermediate. The products are spirocyclic dihydrop... A Novel Redox-Fluorescence Switch Based on a Triad Containing Ferrocene and Perylene Diimide Units. [作者：Zhang, Ruili;Wang, Zhongliang;Wu, Yishi;Fu, Hongbing;Yao, Jiannian;,期刊：Organic Letters, 页码：3065-3068 , 文章类型： 研究论文，,卷期：2008年10-14] By taking advantage of the features of ferrocene as a redox-active electron donor unit and perylene diimide as a fluorescence unit, a new redox fluorescence switch can be constructed from this triad. A novel fluoride ion colorimetric chemosensor. [作者：Yeo, Hyoung Min;Ryu, Byung Ju;Nam, Kye Chun;,期刊：Organic Letters, 页码：2931-2934 , 文章类型： 研究论文，,卷期：2008年10-14] A novel phosphonium deriv. of naphthalene was synthesized by the reaction of 1,8-dibromomethylnaphthalene with triphenylphosphine, which only showed a distinct color change when treated with fluoride ions. Fluorescence Response of a 4-Trifluoroacetylaminophthalimide to Iodide Ions upon 254 nm Irradiation in MeCN. [作者：Okamoto, Hideki;Konishi, Hiroyuki;Kohno, Mami;Satake, Kyosuke;,期刊：Organic Letters, 页码：3125-3128 , 文章类型： 研究论文，,卷期：2008年10-14] Photochemistry, and Photographic and Other Reprographic The title trifluoroacetylaminophthalimide deriv. produced a violet fluorescence (lFLmax 392 nm) in MeCN, and it displayed a green emission (lFLmax 506 nm) after irr... Validating an Endoperoxide as a Key Intermediate in the Biosynthesis of Elysiapyrones. [作者：Diaz-Marrero, Ana R.;Cueto, Mercedes;D'Croz, Luis;Darias, Jose;,期刊：Organic Letters, 页码：3057-3060 , 文章类型： 研究论文，,卷期：2008年10-14] Compds. (I-III) isolated from Elysia diomedea are described. Compd. I is an endoperoxide deriv. of elysiapyrone A. The biomimetic-type transformation of compd. I to elysiapyrone A catalyzed by neutral base transformed ... Organometallic Activation of a Fluorogen for Templated Nucleic Acid Detection. [作者：Franzini, Raphael M.;Kool, Eric T.;,期刊：Organic Letters, 页码：2935-2938 , 文章类型： 研究论文，,卷期：2008年10-14] A nucleic acid detection scheme that employs DNA-mediated delivery of an organomercury activator to unmask a fluorophore is described. The approach relies on adjacent hybridization of two oligonucleotide conjugates contg... Highly Efficient Methyl Ketone Synthesis by Water-Assisted C-C Coupling between Olefins and Photoactivated Acetone. [作者：Shiraishi, Yasuhiro;Tsukamoto, Daijiro;Hirai, Takayuki;,期刊：Organic Letters, 页码：3117-3120 , 文章类型： 研究论文，,卷期：2008年10-14] corresponding Me ketones highly efficiently via water-assisted C-C coupling between acetonyl radical and olefins. A chiral pool approach to the synthesis of optically active tetrahalo norbornyl building blocks. [作者：Khan, Faiz Ahmed;Sudheer, Ch.;,期刊：Organic Letters, 页码：3029-3032 , 文章类型： 研究论文，,卷期：2008年10-14] derivs. were prepd. in excellent yields. The monosubstituted derivs. I were obtained with good enantiopurities. A kaleidoscopic change in the product formation and distribution was obsd. by changing the chronol. of rea... Gold-Catalyzed Synthesis of Polycyclic Enones from Carbon Tethered 1,3-Enynyl Carbonyls via Tandem Heteroenyne Metathesis and Nazarov Reaction. [作者：Jin, Tienan;Yamamoto, Yoshinori;,期刊：Organic Letters, 页码：3137-3139 , 文章类型： 研究论文，,卷期：2008年10-14] An efficient and general Au(III)-catalyzed tandem reaction, heteroenyne metathesis and Nazarov cyclization, of 1,3-enynyl ketones to produce fused tri- and tetracyclic enones has been developed. The products were formed... Autophagy-Modulating Aminosteroids Isolated from the Sponge Cliona celata. [作者：Keyzers, Robert A.;Daoust, Julie;Davies-Coleman, Michael T.;Van Soest, Rob;Balgi, Aruna;Donohue, Elizabeth;Roberge, Michel;Andersen, Raymond J.;,期刊：Organic Letters, 页码：2959-2962 , 文章类型： 研究论文，,卷期：2008年10-14] Clionamines A-D (I), new aminosteroids that modulate autophagy, have been isolated from South African specimens of the sponge Cliona celata. Clionamine D has an unprecedented spiro bislactone side chain. Synthesis of Fluorogenic Polymers for Visualizing Cellular Internalization. [作者：Mangold, Shane L.;Carpenter, Rachael T.;Kiessling, Laura L.;,期刊：Organic Letters, 页码：2997-3000 , 文章类型： 研究论文，,卷期：2008年10-14] The binding of a polymeric ligand to a cell surface receptor can promote its internalization. Methods to track and visualize multivalent ligands within a cell can give rise to new therapeutic strategies and illuminate s...