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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   Mechanistic Insights into the Catalytic Asymmetric Allylboration of Ketones: Bronsted or Lewis Acid Activation?. [作者：Paton, Robert S.;Goodman, Jonathan M.;Pellegrinet, Silvina C.;,期刊：Organic Letters, 页码：37-40 , 文章类型： 研究论文，,卷期：2009年11-1] Binaphthol ligands promote the enantioselective addn. of allylboronates to ketones. In this study, DFT calcns. were used to establish the identity of the reacting chiral species. The results show that a cyclic Lewis ac... Broadly Applicable Synthesis of 1,2,4,5-Tetraoxanes. [作者：Ghorai, Prasanta;Dussault, Patrick H.;,期刊：Organic Letters, 页码：213-216 , 文章类型： 研究论文，,卷期：2009年11-1] Re2O7 is a mild and efficient catalyst for the high-yielding condensation of 1,1-dihydroperoxides with ketones or aldehydes to form 1,2,4,5-tetraoxanes, including targets not easily prepd. via existing methodol. When ap... Bifunctional Reactivity of CuI: Sequential Ring Opening/N-Arylation. [作者：Martins, Andrew;Lemouzy, Sebastien;Lautens, Mark;,期刊：Organic Letters, 页码：181-183 , 文章类型： 研究论文，,卷期：2009年11-1] The sequential use of a single CuI catalyst enables the one-pot synthesis of N'-arylaminooxazolidinones, e.g., I, through a Lewis acid catalyzed rearrangement followed by an N-arylation reaction. Contrary to previous re... Au-Catalyzed cyclization of monopropargylic triols: an expedient synthesis of monounsaturated spiroketals. [作者：Aponick, Aaron;Li, Chuan-Ying;Palmes, Jean A.;,期刊：Organic Letters, 页码：121-124 , 文章类型： 研究论文，,卷期：2009年11-1] The gold-catalyzed cyclization of monopropargylic triols to form olefin-contg. spiroketals is reported. The reactions are rapid and high yielding when 2 mol % of the catalyst generated in situ from Au[P(t-Bu)2(o-bipheny... NHC-Catalyzed Reactions of Aryloxyacetaldehydes: A Domino Elimination/Conjugate Addition/Acylation Process for the Synthesis of Substituted Coumarins. [作者：Phillips, Eric M.;Wadamoto, Manabu;Roth, Howard S.;Ott, Andrew W.;Scheidt, Karl A.;,期刊：Organic Letters, 页码：105-108 , 文章类型： 研究论文，,卷期：2009年11-1] N-Heterocyclic carbenes (NHCs) catalyze a domino Michael addn./acylation reaction to form 3,4-dihydrocoumarins, e.g. I (R = H, MeO, Me, Br, F). The reaction proceeds through addn. of the NHC to an aryloxyaldehyde follow... Application of Ynamides in the Synthesis of 2-Amidoindoles. [作者：Dooleweerdt, Karin;Ruhland, Thomas;Skrydstrup, Troels;,期刊：Organic Letters, 页码：221-224 , 文章类型： 研究论文，,卷期：2009年11-1] A Pd-catalyzed, one-pot, two-step synthesis of 2-amidoindoles, e.g., I, from ynamides and o-iodoanilines is reported. A key highlight of this sequence is that after the Sonogashira reaction, intramol. cyclization to the... A Novel Synthetic Route to 3-Sulfenyl- and 3-Selenylindoles by n-Bu4NI-Induced Electrophilic Cyclization. [作者：Chen, Yu;Cho, Chul-Hee;Larock, Richard C.;,期刊：Organic Letters, 页码：173-176 , 文章类型： 研究论文，,卷期：2009年11-1] 3-Sulfenyl- and 3-selenylindoles, e. g. I, are prepd. in excellent yields by the palladium/copper-catalyzed crossing coupling of N,N-dialkyl-o-iodoanilines and terminal alkynes, followed by electrophilic cyclization with... One-Pot Synthesis of Substituted 2,2'-Bipyrroles. A Straightforward Route to Aryl Porphycenes. [作者：Sanchez-Garcia, David;Borrell, Jose I.;Nonell, Santi;,期刊：Organic Letters, 页码：77-79 , 文章类型： 研究论文，,卷期：2009年11-1] 4-MeC6H4, 4-MeOCH2C6H4, 2-naphthyl, 4-FC6H4, 4-MeOC6H4, 4-F3CC6H4, 3,5-(MeO)2C6H3, 4-pyridinyl] are prepd. in one pot from Et arylpropenoates RCH:CHCO2Et [R = Ph, 4-MeC6H4, 4-MeOCH2C6H4, 2-naphthyl, 4-FC6H4, 4-MeOC6H4, 4... Sila-Morita-Baylis-Hillman Reaction of Arylvinyl Ketones: Overcoming the Dimerization Problem. [作者：Trofimov, Alexander;Gevorgyan, Vladimir;,期刊：Organic Letters, 页码：253-255 , 文章类型： 研究论文，,卷期：2009年11-1] Arylvinyl ketones, under Morita-Baylis-Hillman (MBH) reaction conditions, produce a mixt. of dimerization products. A soln. to this problem: a sila-MBH reaction is proposed. This cascade reaction involves addn. of phos... Intermolecular Reaction of Internal Alkynes and Imines: Propargyl Tosylates as Key Partners in a Gold-Catalyzed [4 + 1] Unusual Cyclization Leading to Cyclopent-2-enimines. [作者：Suarez-Pantiga, Samuel;Rubio, Eduardo;Alvarez-Rua, Carmen;Gonzalez, Jose M.;,期刊：Organic Letters, 页码：13-16 , 文章类型： 研究论文，,卷期：2009年11-1] Propargyl tosylates react with N-tosylaldimines to afford cyclopent-2-enimines in a gold-catalyzed process that involves a deep reorganization of both substrates. The formal [4+1] cyclization is initiated by a 1,2-migra... Highly Regioselective Hydroformylation of Styrene and Its Derivatives Catalyzed by Rh Complex with Tetraphosphorus Ligands. [作者：Yu, Shichao;Chie, Yu-ming;Guan, Zheng-hui;Zou, Yaping;Li, Wei;Zhang, Xumu;,期刊：Organic Letters, 页码：241-244 , 文章类型： 研究论文，,卷期：2009年11-1] Styrene has been hydroformylated to the linear aldehyde with surprisingly high regioselectivity (l/b up to 22 for styrene) using a Rh complex with a tetraphosphorus ligand. To the best of our knowledge, this is the high... Highly Diastereoselective Zn/SnCl2-Mediated gem-Difluoroallylation of Chiral Hydrazones. [作者：Yue, Xuyi;Zhang, Xingang;Qing, Feng-Ling;,期刊：Organic Letters, 页码：73-76 , 文章类型： 研究论文，,卷期：2009年11-1] Gem-Difuoroallylic zinc reacts with chiral hydrazones, e.g. (benzylideneamino)oxazolidinone I, in the presence of SnCl2 to give versatile chiral gem-difluorohomoallylic amine building blocks, e.g. II, in good yields and ... Ruthenium-catalyzed synthesis of functionalized 1,3-dienes. [作者：Achard, Mathieu;Derrien, Nolwenn;Zhang, Hui-Jun;Demerseman, Bernard;Bruneau, Christian;,期刊：Organic Letters, 页码：185-188 , 文章类型： 研究论文，,卷期：2009年11-1] Functionalized 1,3-diene derivs. have been prepd. by regioselective allylation of various nucleophiles with 1,3-dienic carbonates in the presence of a (N,O-carboxylate) allylruthenium precatalyst. Zamamidines A and B, New Manzamine Alkaloids from the Sponge Amphimedon Species. [作者：Takahashi, Yohei;Kubota, Takaaki;Fromont, Jane;Kobayashi, Jun'ichi;,期刊：Organic Letters, 页码：21-24 , 文章类型： 研究论文，,卷期：2009年11-1] New manzamine alkaloids, zamamidines A (I) and B (II), have been isolated from an Okinawan marine sponge Amphimedon species. The structures and stereochem. of I and II were elucidated from the spectroscopic data and con... Englerin A, a Selective Inhibitor of Renal Cancer Cell Growth, from Phyllanthus engleri. [作者：Ratnayake, Ranjala;Covell, David;Ransom, Tanya T.;Gustafson, Kirk R.;Beutler, John A.;,期刊：Organic Letters, 页码：57-60 , 文章类型： 研究论文，,卷期：2009年11-1] Natural product screening showed that an ext. from Phyllanthus engleri selectively inhibited the growth of renal cancer cell lines. Bioassay-guided fractionation yielded two new guaiane sesquiterpenes, englerins A (1) an... Antibacterial Neurymenolides from the Fijian Red Alga Neurymenia fraxinifolia. [作者：Stout, E. Paige;Hasemeyer, Adam P.;Lane, Amy L.;Davenport, Theresa M.;Engel, Sebastian;Hay, Mark E.;Fairchild, Craig R.;Prudhomme, Jacques;Le Roch, Karine;Aalbersberg, William;Kubanek, Julia;,期刊：Organic Letters, 页码：225-228 , 文章类型： 研究论文，,卷期：2009年11-1] Two novel a-pyrone macrolides, neurymenolides A (I) and B (II), were isolated from the Fijian red alga Neurymenia fraxinifolia and characterized using a combination of NMR and mass spectral analyses. These mols. represe...