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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74条记录   Efficient Access to a Versatile 5,6-Dithio-1,10-phenanthroline Building Block and Corresponding Organometallic Complexes. [作者：Chesneau, Bertrand;Passelande, Angelique;Hudhomme, Pietrick;,期刊：Organic Letters, 页码：649-652 , 文章类型： 研究论文，,卷期：2009年11-3] A facile access to 5,6-bis(2-cyanoethylsulfanyl)-1,10-phenanthroline (1) and its ruthenium(II) bipyridine complex (2), as versatile building blocks for the straightforward synthesis of 5,6-dithio functionalized 1,10-phen... Total Synthesis of FR901483. [作者：Carson, Cheryl A.;Kerr, Michael A.;,期刊：Organic Letters, 页码：777-779 , 文章类型： 研究论文，,卷期：2009年11-3] The architecturally sophisticated skeleton of the immunosuppressive alkaloid FR901483 (I) was assembled via a process relying on the reaction of an in situ generated imine with a suitably disposed donor-acceptor cyclopro... Use of 4-Cyanocoumarins as Dienophiles in a Facile Synthesis of Highly Substituted Dibenzopyranones. [作者：Jung, Michael E.;Allen, Damian A.;,期刊：Organic Letters, 页码：757-760 , 文章类型： 研究论文，,卷期：2009年11-3] A new synthesis of dibenzopyranones, e.g., I (R1 = H, Me, MeO; R2 = H, Me, Cl), is reported via the Diels-Alder cycloaddn. of 4-cyanocoumarins with 1-silyloxydienes to give the corresponding adducts which were then conve... Stereodivergency of Triazolium and Imidazolium-Derived NHCs for Catalytic, Enantioselective Cyclopentane Synthesis. [作者：Kaeobamrung, Juthanat;Bode, Jeffrey W.;,期刊：Organic Letters, 页码：677-680 , 文章类型： 研究论文，,卷期：2009年11-3] Chiral triazolium- and imidazolium-derived N-heterocyclic carbene catalysts promote the direct annulation of a,b-unsatd. aldehydes R1CH:CHCHO (R1 = Ph, 4-MeOC6H4, 1-naphthyl, 2-furyl, etc.) and achiral a-hydroxy enones R... An Efficient Method for Construction of the Angularly Fused 6,3,5-Tricyclic Skeleton of Mycorrhizin A and Its Analogues. [作者：Yu, Binxun;Jiang, Tuo;Quan, Weiguo;Li, Junpeng;Pan, Xinfu;She, Xuegong;,期刊：Organic Letters, 页码：629-632 , 文章类型： 研究论文，,卷期：2009年11-3] The angularly fused 6,3,5-tricyclic system is readily generated via a cascade cyclization under acid promotion. The reaction proceeds at room temp. with high stereochem. fidelity from the electrophilic center of the epo... Enantioselective Total Synthesis of Aspergillide C. [作者：Nagasawa, Tomohiro;Kuwahara, Shigefumi;,期刊：Organic Letters, 页码：761-764 , 文章类型： 研究论文，,卷期：2009年11-3] The first enantioselective total synthesis of aspergillide C (I), a cytotoxic 14-membered macrolide isolated from the marine-derived fungus Aspergillus ostianus, has been accomplished from a com. available chiral glycido... Synthesis of the First Calix[6]crypturea via a Versatile Tris-azide Precursor. [作者：Menand, Mickael;Jabin, Ivan;,期刊：Organic Letters, 页码：673-676 , 文章类型： 研究论文，,卷期：2009年11-3] Various nitrogenous calix[6]arene-based receptors have been synthesized in one step from a new C3v sym. calix[6]arene intermediate decorated with azido groups. Hence, the first calix[6]crypturea has been obtained in hig... Stereocontrolled Approach to Bromofluoroalkenes and Their Use for the Synthesis of Tri- and Tetrasubstituted Fluoroalkenes. [作者：Landelle, Gregory;Champagne, Pier Alexandre;Barbeau, Xavier;Paquin, Jean-Francois;,期刊：Organic Letters, 页码：681-684 , 文章类型： 研究论文，,卷期：2009年11-3] An addn./elimination reaction of organolithium reagents to silylated b,b-difluorostyrene derivs., e.g. I (R = Me3Si, Et3Si, R1 = H, 3-Cl), followed by a bromination/desilicobromination reaction provides a simple and effe... Nickel-Catalyzed Regioselective Hydroalkynylation of Styrenes: Improved Catalyst System, Reaction Scope, and Mechanism. [作者：Shirakura, Masamichi;Suginome, Michinori;,期刊：Organic Letters, 页码：523-526 , 文章类型： 研究论文，,卷期：2009年11-3] proceeded efficiently at room temp. in the presence of 3 mol % of Ni(cod)2 with a PMePh2 ligand. Use of 2-deuteriotriisopropylsilylacetylene in the hydroalkynylation of styrenes resulted in regioselective incorporation ... Rhodium-Catalyzed Methylthio Transfer Reaction between Ketone a-Positions: Reversible Single-Bond Metathesis of C-S and C-H Bonds. [作者：Arisawa, Mieko;Suwa, Katsunori;Yamaguchi, Masahiko;,期刊：Organic Letters, 页码：625-627 , 文章类型： 研究论文，,卷期：2009年11-3] methylthiolated with p-cyano-a-methylthioacetophenone giving a-phenylthio-a-methylthio ketones. The methylthio transfer reaction between the ketone a-positions was reversible and at equil., and the methylthio group was ... Polyisobutylene-Anchored N-Heterocyclic Carbene Ligands. [作者：Hongfa, Chayanant;Su, Haw-Lih;Bazzi, Hassan S.;Bergbreiter, David E.;,期刊：Organic Letters, 页码：665-667 , 文章类型： 研究论文，,卷期：2009年11-3] The synthesis of polyisobutylene (PIB)-supported N-heterocyclic carbenes (NHCs) that are useful as ligands for recoverable/recyclable organometallic complexes is described. Both PIB-bound carbenes analogous to SIMes and... Mycangimycin, a polyene peroxide from a mutualist Streptomyces sp. [作者：Oh, Dong-Chan;Scott, Jarrod J.;Currie, Cameron R.;Clardy, Jon;,期刊：Organic Letters, 页码：633-636 , 文章类型： 研究论文，,卷期：2009年11-3] A mutualist actinomycete of the southern pine beetle, Dendroctonus frontalis, produces a polyene peroxide, mycangimycin (I), with pronounced antifungal activity. Its structure, abs. configuration, and biol. activity wer... Total synthesis of (+)-azinothricin and (+)-kettapeptin. [作者：Hale, Karl J.;Manaviazar, Soraya;George, Jonathan H.;Walters, Marcus A.;Dalby, Stephen M.;,期刊：Organic Letters, 页码：733-736 , 文章类型： 研究论文，,卷期：2009年11-3] Asym. total syntheses of (+)-azinothricin (I, R = Et) and (+)-kettapeptin (I, R = Me) were achieved. The synthetic pathway exploits a highly chemoselective coupling reaction between the fully elaborated cyclodepsipeptid... Synthesis of A83586C analogs with potent anticancer and b-catenin/ TCF4/osteopontin inhibitory effects and insights into how A83586C modulates E2Fs and pRb. [作者：Hale, Karl J.;Manaviazar, Soraya;Lazarides, Linos;George, Jonathan;Walters, Marcus A.;Cai, Jiaqiang;Delisser, Vern M.;Bhatia, Gurpreet S.;Peak, S. Andrew;Dalby, Stephen M.;Lefranc, Amandine;Chen, Ying-Nan P.;Wood, Alexander W.;Crowe, Paul;Erwin, Pauline;E,期刊：Organic Letters, 页码：737-740 , 文章类型： 研究论文，,卷期：2009年11-3] The synthesis of three potent new antitumor agents is described: the A83586C-citropeptin hybrid (I, R = OMe), the A83586C-GE3 hybrid (I, R = H), and L-Pro-A83586C (II). Significantly, compds. I (R = OMe, H) function as ... Design, synthesis, and application of enantioselective coupling reagent with a traceless chiral auxiliary. [作者：Kolesinska, Beata;Kaminski, Zbigniew J.;,期刊：Organic Letters, 页码：765-768 , 文章类型： 研究论文，,卷期：2009年11-3] Stable chiral N-triazinylbrucinium tetrafluoroborate enantioselectively activates racemic carboxylic acids yielding enantiomerically enriched amides, esters, and dipeptides with er from 8:92 to 0.5:99.5. Due to the depa... A New Strategy for the Synthesis of Optically Pure b-Fluoroalkyl b-Amino Acid Derivatives. [作者：Fustero, Santos;del Pozo, Carlos;Catalan, Silvia;Aleman, Jose;Parra, Alejandro;Marcos, Vanesa;Ruano, Jose Luis Garcia;,期刊：Organic Letters, 页码：641-644 , 文章类型： 研究论文，,卷期：2009年11-3] The first general approach for the diastereoselective formation of a variety of optically pure anti-b-fluoroalkyl b-amino acid derivs. is described. The process relies on the stereocontrolled reaction, mediated by a rem...