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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27条记录   Developing Novel Organocatalyzed Aldol Reactions for the Enantioselective Synthesis of Biologically Active Molecules [作者：BHANUSHALI MAYUR; ZHAO CONGGUI,期刊：Synthesis, 页码：1815-1830 , 文章类型： Review，,卷期：2011年-12] The aldol reaction is one of the most important methods for the formation of carbon-carbon bonds. Because of its significance and utility, asymmetric versions of this reaction have been realized with different approaches... A Novel Catalyst-Free Tandem Reaction for the Synthesis of 5-Hydroxy-1,5-dihydro-2H-pyrrol-2-ones in Water Medium [作者：WU MINGYU; LI KUN; WANG NA; HE TING; YU XIAOQI,期刊：Synthesis, 页码：1831-1839 , 文章类型： Article，,卷期：2011年-12] A novel catalyst-free, water-medium, tandem reaction for the synthesis of 5-hydroxy-1,5-dihydro-2H-pyrrol-2-ones was developed through a one-pot strategy from nitroethylenes and 1,3-dicarbonyl compounds. A series of 1-ar... Synthesis of 4-Hydroxy-4H-chromenes by Reaction of Salicylic Aldehydes with Alkynals Catalyzed by Silyl Prolinol Ethers [作者：ALEMAN JOSE; ALVARADO CUAUHTEMOC; MARCOS VANESA; NUNEZ ALBERTO; GARCIA RUANO JOSE LUIS,期刊：Synthesis, 页码：1840-1846 , 文章类型： Article，,卷期：2011年-12] We report an oxa-Michael/Baylis-Hillman tandem reaction between salicylaldehydes and alk-2-ynals activated by silyl prolinol ethers, affording 2,3-disubstituted 4-hydroxy-4H-chromenes in good yields and enantiomeric rati... Organocatalytic Conjugate Additions of Acetylacetone to 3-Ylideneoxindoles: A Direct Access to Highly Enantioenriched Oxindole Derivatives [作者：DUAN SHUWEN; LU HAIHUA; ZHANG FUGEN; XUAN JUN; CHEN JIARONG; XIAO WENJING,期刊：Synthesis, 页码：1847-1852 , 文章类型： Article，,卷期：2011年-12] A highly enantioselective organocatalytic conjugate addition of acetylacetone to 3-ylideneoxindoles is described. This method provides polysubstituted oxindoles in good to excellent enantioselectivities and high isolated... Origins of Enantioselectivity in Proline-Catalyzed Friedlander Condensations of 4-Substituted Cyclohexanones [作者：LI LE; SEIDEL DANIEL,期刊：Synthesis, 页码：1853-1858 , 文章类型： Article，,卷期：2011年-12] Computational studies reveal the origin of the enantioselectivity in proline-catalyzed Friedlander condensations of 4-substituted cyclohexanones with aminobenzaldehydes. Both the catalyst structure and the nature of the ... Formation of Functionalized Cyclopentenes via Catalytic Asymmetric [3+2] Cycloaddition of Acrylamides with an Allenoate Promoted by Dipeptide-Derived Phosphines [作者：HAN XIAOYU; WANG SUXI; ZHONG FANGRUI; LU YIXIN,期刊：Synthesis, 页码：1859-1864 , 文章类型： Article，,卷期：2011年-12] Acrylamides derived from 3,5-dimethyl-1H-pyrazole are employed in the asymmetric [3+2] cycloaddition with the allenoate, tert-butyl buta-2,3-dienoate, for the first time. D-Threonine-L-tert-leucine-based bifucntional pho... Isothiourea-Catalyzed Asymmetric O- to C-Carboxyl Transfer of Furanyl Carbonates [作者：JOANNESSE CAROLINE; MORRILL LOUIS C; CAMPBELL CRAIG D; SLAWIN ALEXANDRA M Z; SMITH ANDREW D,期刊：Synthesis, 页码：1865-1879 , 文章类型： Article，,卷期：2011年-12] The ability of a chiral isothiourea to promote the regio- and enantioselective O- to C-carboxyl transfer of a series of 3-alkyl-5-aryl- and 5-methyl-3-phenylfuranyl carbonates is examined, generating preferentially the a... Enantioselective Organocatalytic Aryloxylation of beta-Keto Esters [作者：GREENAWAY KEVIN; DAMBRUOSO PAOLO; FERRALI ALESSANDRO; HAZELWOOD ANDREW J; SLADOJEVICH FILIPPO; DIXON DARREN J,期刊：Synthesis, 页码：1880-1886 , 文章类型： Article，,卷期：2011年-12] An efficient enantioselective aryloxylation of cyclic beta-keto esters with a selection of substituted o-quinones catalyzed by a bifunctional cinchona alkaloid derivative, giving entry to tricyclic dioxin adducts with hi... Organocatalytic Domino Double Michael Reaction of Ethyl (E)-7-Oxohept-2-enoate and alpha,beta-Unsaturated Aldehydes: Efficient Asymmetric Synthesis of Cyclohexanes with Four Contiguous Stereocenters [作者：HONG BORCHERNG; SADANI AMIT A; NIMJE ROSHAN Y; DANGE NITIN S; LEE GENEHSIANG,期刊：Synthesis, 页码：1887-1895 , 文章类型： Article，,卷期：2011年-12] Organocatalytic domino double Michael reactions of ethyl (E)-7-oxohept-2-enoate and alpha,beta-unsaturated aldehydes provided ethyl 2-(2,4-diformyl-3-phenylcyclohexyl)acetate with excellent diastereoselectivities (>20:1 ... Synthesis of Spiro Bis-Indanes via Domino Stetter-Aldol-Michael and Stetter-Aldol-Aldol Reactions: Scope and Limitations [作者：SANCHEZLARIOS EDUARDO; HOLMES JANICE M; DASCHNER CRYSTAL L; GRAVEL MICHEL,期刊：Synthesis, 页码：1896-1904 , 文章类型： Article，,卷期：2011年-12] The synthesis of spiro bis-indanes by means of N-heterocyclic carbene (NHC) catalysis is reported. The dimerization of various o-formylchalcone substrates or their combination with phthaldialdehyde derivatives under the ... Organocatalytic Asymmetric Synthesis of Functionalized 4H-Chromenes via a One-Pot Domino Michael-Hemiacetalization and Dehydration Sequence [作者：ENDERS DIETER; URBANIETZ GREGOR; RAABE GERHARD,期刊：Synthesis, 页码：1905-1911 , 文章类型： Article，,卷期：2011年-12] A one-pot thiourea-catalyzed enantioselective synthesis of polyfunctionalized 4H-chromenes via a domino Michael-hemiacetalization reaction and subsequent dehydration is reported. Starting from 2-nitrovinylphenols and bet... Highly Efficient and Modularly Tuned Bicyclic Organocatalyst for the Enantioselective Michael Addition of Aldehydes to Nitroalkenes [作者：XIAO JIAN; XU FENGXIA; LU YUNPENG; LIU YANLING; LOH TECKPENG,期刊：Synthesis, 页码：1912-1917 , 文章类型： Article，,卷期：2011年-12] A new type of bicyclic organocatalyst has been successfully applied to the asymmetric Michael addition of aldehydes to nitrostyrenes in good yields and good enantioselectivities by using a self-assembly strategy. The suc... Amino Acid Catalysed Aldol Reactions in Cyclic Carbonate Solvents [作者：MORCILLO MARIA; NORTH MICHAEL; VILLUENDAS PEDRO,期刊：Synthesis, 页码：1918-1925 , 文章类型： Article，,卷期：2011年-12] Ethylene and propylene carbonates are shown to be alternative polar aprotic solvents for cross-aldol reactions catalysed by the primary amino acids (S)-phenylalanine and (S)-tryptophan. In contrast to the corresponding p... Chiral Bis-pyridinium Salts as Novel Stereoselective Catalysts for the Metal-Free Diels-Alder Cycloaddition of alpha,beta-Unsaturated Aldehydes [作者：GENONI ANDREA; BENAGLIA MAURIZIO; PUGLISI ALESSANDRA; ROSSI SERGIO,期刊：Synthesis, 页码：1926-1929 , 文章类型： Article，,卷期：2011年-12] The synthesis of enantiomerically pure C-2-symmetric bis-pyridinium salts was realized through a simple condensation of 2-pyridyl-carboxyaldehydes with a chiral diamine. The catalytic properties of such novel compounds w... Efficient Organocatalytic Dual Activation Strategy for Preparing the Versatile Synthons (2E)-1-(Het)Aryl/styryl-3-(dimethylamino)prop-2-en-1-ones and alpha-(E)-[(Dimethylamino)methylene]cycloalkanones [作者：BINDAL SACHIN; KUMAR DINESH; KOMMI DAMODARA N; BHATIYA SONAM; CHAKRABORTI ASIT K,期刊：Synthesis, 页码：1930-1935 , 文章类型： Article，,卷期：2011年-12] A novel organocatalytic dual activation strategy is reported for an efficient synthesis of the versatile synthons (2E)-1-aryl/heteroaryl/styryl-3-(dimethylamino)prop-2-en-1-ones and alpha-(E)-[(dimethylamino)methylene]cy... Enantioselective Route to beta-Silyl-delta-keto Esters by Organocatalyzed Regioselective Michael Addition of Methyl Ketones to a (Silylmethylene)malonate and Their Use in Natural Product Synthesis [作者：CHOWDHURY RAGHUNATH; GHOSH SUNIL K,期刊：Synthesis, 页码：1936-1945 , 文章类型： Article，,卷期：2011年-12] The direct Michael addition of alkyl methyl ketones through the acetyl methyl terminal to diethyl {[dimethyl(phenyl) silyl] methylene} malonate was catalyzed by the (S)-N-(pyrrolidin-2-ylmethyl)pyrrolidine/trifluoroaceti...