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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77条记录   Synthesis of Styrenes Using Ruthenium-Catalyzed Ring-Closing Enyne Metathesis. [作者：Yoshida, Kazuhiro;Shishikura, Yuka;Takahashi, Hidetoshi;Imamoto, Tsuneo;,期刊：Organic Letters, 页码：2777-2780 , 文章类型： 研究论文，,卷期：2008年10-13] The synthesis of substituted styrenes, e.g. I (R1 = R2 = n-Pr), was achieved by ring-closing enyne metathesis (RCEM)/elimination of enyne substrates, e.g. II. The synthetic approach was also effective for a different ty... Organocatalytic Enantioselective Diels-Alder Reaction of Dienes with a-(N,N-Diacylamino)acroleins. [作者：Ishihara, Kazuaki;Nakano, Kazuhiko;Akakura, Matsujiro;,期刊：Organic Letters, 页码：2893-2896 , 文章类型： 研究论文，,卷期：2008年10-13] Catalytic and highly enantioselective Diels-Alder reaction of cyclic and provides cyclic a-quaternary a-amino acid precursors, e.g. II (R = Me, Ph). The conformationally flexible chiral ammonium salt of H-L-Phe-L-Leu-N(... Palladium-Pincer Complex Catalyzed C-C Coupling of Allyl Nitriles with Tosyl Imines via Regioselective Allylic C-H Bond Functionalization. [作者：Aydin, Juhanes;Szabo, Kalman J.;,期刊：Organic Letters, 页码：2881-2884 , 文章类型： 研究论文，,卷期：2008年10-13] A mechanistically new palladium-pincer complex catalyzed allylation of sulfonimines is presented. This reaction involves C-H bond functionalization of allyl nitriles under mild conditions. The reaction proceeds with a ... A Proton-Triggered ON-OFF-ON Fluorescent Chemosensor for Mg(II) via Twisted Intramolecular Charge Transfer. [作者：Liu, Yu;Han, Min;Zhang, Heng-Yi;Yang, Li-Xu;Jiang, Wei;,期刊：Organic Letters, 页码：2873-2876 , 文章类型： 研究论文，,卷期：2008年10-13] A novel fluorescent chemosensor was synthesized and shows interesting fluorescent ON-OFF-ON processes through mediating its twisted intramol. charge transfer (TICT) state. An exclusively fluorescent enhancement is obsd.... Facile synthesis and optical properties of bithiophenesilane monodendrons and dendrimers. [作者：Luponosov, Yuriy N.;Ponomarenko, Sergei A.;Surin, Nikolay M.;Muzafarov, Aziz M.;,期刊：Organic Letters, 页码：2753-2756 , 文章类型： 研究论文，,卷期：2008年10-13] Three generations of bithiophenesilane monodendrons and dendrimers consisting of 3-45 2,2'-bithiene-5,5'-diyl units were synthesized by means of effective coupling reactions between the corresponding bithienyllithium der... O-Selective Condensation Using P-N Bond Cleavage in RNA Synthesis without Base Protection. [作者：Ohkubo, Akihiro;Kuwayama, Yasukazu;Kudo, Tomomi;Tsunoda, Hirosuke;Seio, Kohji;Sekine, Mitsuo;,期刊：Organic Letters, 页码：2793-2796 , 文章类型： 研究论文，,卷期：2008年10-13] In RNA synthesis without base protection, a new method for O-selective condensation with more than 99% selectivity was developed by 6-nitro-HOBt-mediated cleavage of undesired P(III)-N bonds on nucleobase moieties. More... D3h-Symmetrical Hydrogen-Bonding Unit as a Saccharide Recognition and Self-Assembling Module. [作者：Abe, Hajime;Horii, Asuka;Matsumoto, Shinya;Shiro, Motoo;Inouye, Masahiko;,期刊：Organic Letters, 页码：2685-2688 , 文章类型： 研究论文，,卷期：2008年10-13] A D3h-sym. triresorcinol module 1,3,5-tris(2,6-dihydroxy-4-pentylphenyl)benzene I was investigated in terms of its hydrogen-bonding ability for glycoside recognition and self-assocn. When I was treated with glycosides, ... Synthesis of an Advanced Intermediate for (+)-Pillaromycinone. [作者：Staunton-Weinreb Annulation Revisited. White, James D.;Demnitz, F. W. J.;Xu, Qing;Martin, William H. C.;,期刊：Organic Letters, 页码：2833-2836 , 文章类型： 研究论文，,卷期：2008年10-13] Condensation of an orsellinate anion with a 2-cyclohexenone (Staunton-Weinreb annulation) afforded a linear tetracycle which was converted to a protected deriv. of 12a-epipillaromycinone. Methodol. for introducing a 12a... Anionic Indole N-Carbamoyl N ?C Translocation. A Directed remote Metalation Route to 2-Aryl- and 2-Heteroarylindoles. Synthesis of Benz[a]carbazoles and Indeno[1,2-b]indoles. [作者：Zhao, Zhongdong;Jaworski, Ashley;Piel, Isabel;Snieckus, Victor;,期刊：Organic Letters, 页码：2617-2620 , 文章类型： 研究论文，,卷期：2008年10-13] A new LDA-induced anionic N-C carbamoyl migration of 2-arylindoles is reported. Treatment of 2-aryl-N-carbamoylindoles, readily available by direct and ipso-borodesilylative Suzuki-Miyaura cross-coupling routes from I a... Rhodium-Catalyzed Highly Enantio- and Diastereoselective Cotrimerization of Alkenes and Dialkyl Acetylenedicarboxylates Leading to Furylcyclopropanes. [作者：Shibata, Yu;Noguchi, Keiichi;Hirano, Masao;Tanaka, Ken;,期刊：Organic Letters, 页码：2825-2828 , 文章类型： 研究论文，,卷期：2008年10-13] A cationic rhodium(I)/Segphos or H8-BINAP complex catalyzes the unprecedented cotrimerization of com. available monoenes and dialkyl acetylenedicarboxylates, leading to functionalized furylcyclopropanes, e.g. I (E = CO2R... Bis(imino)pyridine Iron Complexes for Aldehyde and Ketone Hydrosilylation. [作者：Tondreau, Aaron M.;Lobkovsky, Emil;Chirik, Paul J.;,期刊：Organic Letters, 页码：2789-2792 , 文章类型： 研究论文，,卷期：2008年10-13] Derivatives, and Condensed Benzenoid Compounds) Section Bis(imino)pyridine iron dinitrogen and dialkyl complexes are well-defined precatalysts for the chemo- and regioselective redn. of aldehydes and ketones. Efficient ... Direct C-2 arylation of alkyl 4-thiazolecarboxylates: new insights in synthesis of heterocyclic core of thiopeptide antibiotics. [作者：Martin, Thibaut;Verrier, Cecile;Hoarau, Christophe;Marsais, Francis;,期刊：Organic Letters, 页码：2909-2912 , 文章类型： 研究论文，,卷期：2008年10-13] The Pd(0)-catalyzed regioselective C-2 (hetero)arylation of tert-Bu 4-thiazolecarboxylate with a broad (hetero)aryl halide is reported, including the direct coupling of pyridinyl halides. The process has allowed the pre... Direct arylation of oxazoles at C2. a concise approach to consecutively linked oxazoles. [作者：Flegeau, Emmanuel Ferrer;Popkin, Matthew E.;Greaney, Michael F.;,期刊：Organic Letters, 页码：2717-2720 , 文章类型： 研究论文，,卷期：2008年10-13] The synthesis of bis- and trisoxazoles via direct arylation is discussed. A variety of aryl groups can be installed at the 2-position of 5-aryl and 5-carboxy-substituted oxazoles under mild conditions using palladium cat... An Intra/Intermolecular Suzuki Sequence to Benzopyridyloxepines Containing Geometrically Pure Exocyclic Tetrasubstituted Alkenes. [作者：Carson, Matthew W.;Giese, Matthew W.;Coghlan, Michael J.;,期刊：Organic Letters, 页码：2701-2704 , 文章类型： 研究论文，,卷期：2008年10-13] A route to enable the prepn. of 5-benzylidenyl-benzopyridyloxepine analogs, e.g., I (R1 = Me, Et, i-Pr; R2 = H, F, MeO), was developed to continue our research in the field of nuclear hormone receptor modulators. The ke... Facile and Efficient One-Pot Synthesis of Highly Functionalized Thieno[2,3-b]thiopyran-4-ones from b-Keto e-Xanthyl Phosphonates. [作者：Corbet, Matthieu;Zard, Samir Z.;,期刊：Organic Letters, 页码：2861-2864 , 文章类型： 研究论文，,卷期：2008年10-13] The one-pot synthesis of various functionalized thieno[2,3-b]thiopyran-4-ones, e.g. I, from readily available b-keto e-xanthyl phosphonates, e.g. II, has been accomplished by combining a Horner-Wadsworth-Emmons olefinati... A Synthesis of N-Bridged 5,6-Bicyclic Pyridines via A Mild Cyclodehydration Using the Burgess Reagent and Discovery of A Novel Carbamylsulfonylation Reaction. [作者：Li, Jie Jack;Li, James J.;Li, Jun;Trehan, Ashok K.;Wong, Henry S.;Krishnananthan, Subramanian;Kennedy, Lawrence J.;Gao, Qi;Ng, Alicia;Robl, Jeffrey A.;Balasubramanian, Balu;Chen, Bang-Chi;,期刊：Organic Letters, 页码：2897-2900 , 文章类型： 研究论文，,卷期：2008年10-13] Cyclodehydration using the Burgess reagent provided a novel approach toward the synthesis of N-bridged 5,6-bicyclic pyridines including pyrrolo-, imidazo-, and triazolopyridines, e.g., I, under mild and neutral condition...