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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34条记录   Synthesis and Application of Redox-Active Hybrid Catalytic Systems Consisting of Polyanilines and Transition Metals [作者：AMAYA TORU; HIRAO TOSHIKAZU,期刊：SYNLETT, 页码：435-448 , 文章类型： Article，,卷期：2011年-4] Polyanilines, well-known conductive polymers, serve as a redox mediator for catalysis in organic redox reactions. This account describes the synthesis and application of hybrid catalysts consisting of polyanilines and tr... beta-Carbon Elimination from Cyclobutanols: A Clean Access to Alkylrhodium Intermediates Bearing a Quaternary Stereogenic Center [作者：CRAMER NICOLAI; SEISER TOBIAS,期刊：SYNLETT, 页码：449-460 , 文章类型： Article，,卷期：2011年-4] The catalytic activation of C-C bonds bears significant ecological and economical advantages. In this account we describe our results for an enantioselective C-C activation of symmetrically substituted tert-cyclobutanols... Cluster Preface: Challenges of Proline-Based Aminocatalysis [作者：LIST BENJAMIN,期刊：SYNLETT, 页码：462-463 , 文章类型： Editorial Material，,卷期：2011年-4] During the last eleven years, aminocatalysis, the catalysis of carbonyl transformations via iminium ion and enamine intermediates has become a highly successful and general approach to asymmetric synthesis. There are now... Catalytic Batch and Continuous Flow Production of Highly Enantioenriched Cyclohexane Derivatives with Polymer-Supported Diarylprolinol Silyl Ethers [作者：ALZA ESTHER; SAYALERO SONIA; CAMBEIRO XACOBE C; MARTINRAPUN RAFAEL; MIRANDA PEDRO O; PERICAS MIQUEL A,期刊：SYNLETT, 页码：464-468 , 文章类型： Article，,卷期：2011年-4] Diarylprolinol silyl ethers immobilized onto polystyrene have been employed as catalysts in the enantioselective domino Michael-Knoevenagel reaction of dimethyl 3-oxoglutarate and 3-substituted acrolein derivatives, incl... One-Pot Organocatalytic Asymmetric Synthesis of 1H-Pyrrolo[1,2a]indol-3(2H)-ones via a Michael-Hemiaminalization-Oxidation Sequence [作者：ENDERS DIETER; WANG CHUAN; YANG XUENA; RAABE GERHARD,期刊：SYNLETT, 页码：469-472 , 文章类型： Article，,卷期：2011年-4] An efficient one-pot organocatalytic asymmetric synthesis of 1,2-cis-disubstituted 1H-pyrrolo[ 1,2a] indol-3(2H)-ones in moderate to good overall yields (49-68%) is presented. The Michael-hemiaminalization-oxidation sequ... Chiral Pyrrolidine Sulfonamide Catalyzed Enantioselective Michael Addition of Cyclohexanones to Maleimides [作者：WANG JIAN; ZHANG MANMAN; ZHANG SHIELI; XU ZIAN; LI HAO; YU XINHONG; WANG WEI,期刊：SYNLETT, 页码：473-476 , 文章类型： Article，,卷期：2011年-4] An organocatalytic enantioselective conjugate addition of cyclohexanones to maleimides has been developed. The process catalyzed by a (S)-pyrrolidine sulfonamide affords synthetically and medicinally useful chiral succin... Highly Enantioselective Synthesis of Fluorinated beta-Amino Ketones via Asymmetric Organocatalytic Mannich Reactions: A Case Study of Unusual Reversal of Regioselectivity [作者：LU MIN; LU YUNPENG; TAN PUAY KAH AMY; LAU QIU YING; ZHONG GUOFU,期刊：SYNLETT, 页码：477-480 , 文章类型： Article，,卷期：2011年-4] The highly enantioselective direct Mannich protocol employing fluoroacetone, p-anisidine, and aldehydes catalyzed by 4-siloxyproline was developed, allowing efficient access for pharmaceutically important fluorinated bet... Organocatalytic Enantioselective Direct Aldol Reaction in Aqueous Media Catalyzed by a Bifunctional Diamine Catalyst [作者：BISAI VISHNUMAYA; SINGH VINOD K,期刊：SYNLETT, 页码：481-484 , 文章类型： Article，,卷期：2011年-4] Organocatalytic direct asymmetric anti-aldol reaction was developed in aqueous medium using a BINOL-derived diamine/protic acid bifunctional catalyst. The catalytic protocol could offer the opportunity to access anti-ald... Diarylprolinol in the Direct Asymmetric Aldol Reaction of Trifluoromethylacetaldehyde Ethyl Hemiacetal with Aldehyde [作者：HAYASHI YUJIRO; YASUI YUSUKE; KAWAMURA TSUYOSHI; KOJIMA MASAHIRO; ISHIKAWA HAYATO,期刊：SYNLETT, 页码：485-488 , 文章类型： Article，,卷期：2011年-4] Asymmetric direct aldol reaction of trifluoromethylacetaldehyde with aldehyde using diarylprolinol as a catalyst, to afford a synthetically useful beta-trifluoromethyl-beta-hydroxy aldehyde with excellent enantioselectiv... Asymmetric Michael Addition of Nitrobenzyl Pyridines to Enals via Iminium Catalysis [作者：VERA SILVIA; LIU YANKAI; MARIGO MAURO; ESCUDEROADAN EDUARDO C; MELCHIORRE PAOLO,期刊：SYNLETT, 页码：489-494 , 文章类型： Article，,卷期：2011年-4] The asymmetric Michael addition of nitrobenzyl pyridines to alpha,beta-unsaturated aldehydes is described. This unprecedented transformation highlights the possibility of extending the nucleophile scope of iminium cataly... Chiral Zwitterions from Vicinal Diamines: Effective and Recoverable Asymmetric Enamine Catalysts [作者：QIAO YUPU; ZHANG LONG; LUO SANZHONG; CHENG JINPEI,期刊：SYNLETT, 页码：495-498 , 文章类型： Article，,卷期：2011年-4] A series of chiral zwitterionic vicinal diamines were designed and synthesized. The zwitterionic catalysts demonstrated good reactivity and enantioselectivity in asymmetric enamine-based transformations and could be read... Reversing the Enantioselectivity of a Peptidic Catalyst by Changing the Solvent [作者：MESSERER MATTHIAS; WENNEMERS HELMA,期刊：SYNLETT, 页码：499-502 , 文章类型： Article，,卷期：2011年-4] The enantioselectivity of the peptidic catalyst H-Pro-Pro-Asp-NH(CH2) 11CH3 is reversed in different solvents. One enantiomer forms preferentially in pure DMSO or MeOH, whereas the other is preferentially formed in mixtu... L-Proline-Catalyzed Asymmetric Michael Addition of 2-Oxindoles to Enones: A Convenient Access to Oxindoles with a Quaternary Stereocenter [作者：FREUND MATTHIAS H; TSOGOEVA SVETLANA B,期刊：SYNLETT, 页码：503-507 , 文章类型： Article，,卷期：2011年-4] A new organocatalytic approach for 1,4-conjugate addition of 2-oxindoles to alpha,beta-unsaturated ketones using the combination of readily available and nonexpensive L-proline and achiral trans-2,5-dimethylpiperazine as... Enantioselective Direct Aldol Reactions of Achiral Ketones with Racemic Enolizable alpha-Substituted Aldehydes: Scope and Limitations [作者：WARD DALE E; JHEENGUT VISHAL; BEYE GARRISON E; GILLIS H MARTIN; KARAGIANNIS ATHANASIOS; BECERRILJIMENEZ FABIOLA,期刊：SYNLETT, 页码：508-512 , 文章类型： Article，,卷期：2011年-4] Aldol reactions of racemic enolizable dioxolan-protected alpha-substituted-beta-ketoaldehydes with representative achiral ketones catalyzed by proline or 5-(2-pyrrolidine-2-yl)-1H-tetrazole in wet DMSO proceed with dynam... 2,5,6-Trisubstituted N-Methylindoles from Site-Selective Suzuki-Miyaura Cross-Coupling, Twofold Heck and 6 pi-Electrocyclization-Dehydrogenation Reactions of 2,3,5-Tribromo-N-methylpyrrole [作者：TOGUEM SERGEMITHERAND TENGHO; LANGER PETER,期刊：SYNLETT, 页码：513-516 , 文章类型： Article，,卷期：2011年-4] Site-selective Suzuki-Miyaura reactions of 2,3,5-tribromo-N-methylpyrrole afforded 5-aryl-2,3-dibromo-N-methylpyrroles. These products were transformed into 2,5,6-trisubstituted N-methylindoles by twofold Heck reactions ... Electrophilic Cyclization of Buta-1,3-diynylarenes: Synthesis of Precursors of (Z)-3-Ene-1,5-diyne Systems Fused to Heterocycles [作者：DANILKINA NATALIA A; BRAESE STEFAN; BALOVA IRINA A,期刊：SYNLETT, 页码：517-520 , 文章类型： Article，,卷期：2011年-4] A simple, convenient, and promising strategy for the synthesis of 2-ethynyl-3-iodo-benzothiophenes, -benzofurans, and -indoles based on electrophilic cyclization of easily available ortho-functionalized (buta-1,3-diynyl)...