iminium catalysis mechanism

ii -Alkylation of Rawal's catalyst as an effective stimulant for the highly asymmetric Michael addition of β-keto esters to functionally rich nitro-olefins. Oleg V. Maltsev, Alexandr S. Kucherenko, Alexandr L. Chimishkyan, Sergei G. Zlotin. Tejedor, García-Tellado, Delgado-Hernández, Diana-Rivero, Díaz-Díaz. -Substituted Pyr­azoles by Aza-Michael Reaction. Fabien Perez, Thibault Leveille, Mathilde Bertolotti, Jean Rodriguez, Yoann Coquerel. Fabian Scharinger, Ádám Márk Pálvölgyi, Veronika Zeindlhofer, Michael Schnürch, Christian Schröder, Katharina Bica‐Schröder. A new type of organocatalyst for highly stereoselective Michael addition of ketones to nitroolefins on water. Quan-Zhong Liu, Xue-Lian Wang, Shi-Wei Luo, Bao-Lei Zheng, Da-Bin Qin. Efficient preparation of trans-α,β-unsaturated aldehydes from saturated aldehydes by oxidative enamine catalysis. Asymmetric Diels-Alder reaction involving chiral benzimidazoles as organocatalysts. Enantioselective Michael addition of α,α-disubstituted aldehydes to nitroolefins catalyzed by a pyrrolidine-pyrazole. 6.10 C–C Bond Formation: Diels–Alder Reaction. Kengo Akagawa, Midori Akiyama, Kazuaki Kudo. Synthesis of the (2S,4S)-stereoisomers of 4-(indol-1-yl) and 4-arylamino derivatives of 5-oxoproline, proline, and 2-hydroxymethylpyrrolidine. Jun-Bing Ling, Yu Su, Hai-Liang Zhu, Guan-Yu Wang, and Peng-Fei Xu . Meritxell Ferré, Xavier Cattoën, Michel Wong Chi Man, Roser Pleixats. Direct Catalytic Asymmetric Synthesis of Pyrazolidine Derivatives. Yen-Te Lee, Utpal Das, Yi-Ru Chen, Chia-Jui Lee, Chi-Han Chen, Mei-Chun Yang, Wenwei Lin. Enantioselective Diels–Alder Reactions of Enals and Alkylidene Diketones Catalyzed by N-Heterocyclic Carbenes. Highly enantioselective organocatalytic synthesis of piperidines. A bis-Lewis basic 2-aminoDMAP/prolinamide organocatalyst for application to the enantioselective synthesis of Warfarin and derivatives. Esther Alza, Sonia Sayalero, Pinar Kasaplar, Diana Almaşi, Miquel A. Pericàs . Qiang Li, Liang Zhou, Xu-Dong Shen, Kai-Chuan Yang, Xiang Zhang, Qing-Song Dai, Hai-Jun Leng, Qing-Zhu Li, Jun-Long Li. Secondary Amine-Catalyzed Asymmetric Origin of rate enhancement and asynchronicity in iminium catalyzed Diels–Alder reactions. Additive Effects on Asymmetric Catalysis. Zebediah C. Girvin, Philip P. Lampkin, Xinyu Liu. Enantiopure Monoprotected cis-1,2-Diaminocyclohexane: One-Step Preparation and Application in Asymmetric Organocatalysis. Enantio- and Periselective Nitroalkene Diels-Alder Reactions Catalyzed by Helical-Chiral Hydrogen Bond Donor Catalysts. Julian Stiller, Eugenia Marqués-López, Raquel P. Herrera, Roland Fröhlich, Carsten Strohmann, and Mathias Christmann. Die Kation-π-Wechselwirkung in der Katalyse mit niedermolekularen Verbindungen. Zs. Synthesis of Six-Membered Spirocyclic Oxindoles with Five Consecutive Stereocenters in an Asymmetric Organocatalytic One-Pot Michael/Michael/Aldol Addition Sequence. Formation of 3-, 4- and 5-Membered Cycles by Intermolecular Reactions. Synthesis and application of novel imidazole and 1H-tetrazolic acid containing catalysts in enantioselective organocatalyzed Diels–Alder reactions. Highly Stereoselective Synthesis of Imidazolidines through the Palladium(0)-Catalyzed Three-Component Reaction of 2,3-Allenylamines, Organic Halides, and Imines. Jose L. Vicario, Efraim Reyes, Dolores Badía, Luisa Carrillo. Clarisa Villegas Gómez, David Cruz Cruz, Rasmus Mose, Karl Anker Jørgensen. Highly asymmetric Michael additions of α,α-disubstituted aldehydes to β-nitroalkenes promoted by chiral pyrrolidine–thiourea bifunctional catalysts. Kaitao Du, Cuifen Lu, Zuxing Chen, Junqi Nie, Guichun Yang. Download : Download high-res image (45KB)Download : Download full-size image. Enantioselective Synthesis of Piperidines through the Formation of Chiral Mixed Phosphoric Acid Acetals: Experimental and Theoretical Studies. Catalytic Conjugate Additions of Geminal Bis(sulfone)s: Expanding the Chemistry of Sulfones as Simple Alkyl Anion Equivalents. Diastereodivergent Asymmetric Sulfa-Michael Additions of α-Branched Enones using a Single Chiral Organic Catalyst. Yona Lee, Seungpyeong Heo, Sung-Gon Kim. The Application of a Recyclable Organocatalytic System to the Asymmetric Domino Michael/Henry Reaction in Aqueous Media. Anhydrides as α,β-unsaturated acyl ammonium precursors: isothiourea-promoted catalytic asymmetric annulation processes. Trienamine Catalysis with 2,4-Dienones: Development and Application in Asymmetric Diels-Alder Reactions. Enantioselective Functionalization of Enamides at the β‐Carbon Center with Indoles. Enantiomerically Enriched 1,2-P,N-Bidentate Ferrocenyl Ligands for 1,3-Dipolar Cycloaddition and Transfer Hydrogenation Reactions. The Z-enoate assisted, Meyer–Schuster rearrangement cascade: unconventional synthesis of α-arylenone esters. International Journal of Mass Spectrometry. Control of the Dual Reactivity (Iminium-Dienamine) of β-Arylmethyl α,β-Unsaturated Aldehydes in Organocatalytic 1,3-Dipolar Cycloadditions with N-Benzoyl C,N-Cyclic Azomethine Imines. Learn about our remote access options, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, 5009 Zaragoza, Spain, Department of Organic Chemistry II, University of the Basque Country (UPV/EHU), P.O. α Srivari Chandrasekhar, Chintakunta Praveen Kumar, Togapur Pavan Kumar, Kothapalli Haribabu, Bharatam Jagadeesh, Jerripothula K. Lakshmi, Prathama S. Mainkar. Interplay of Direct Stereocontrol and Dynamic Kinetic Resolution in a Bifunctional Amine Thiourea Catalyzed Highly Enantioselective Cascade Michael-Michael Reaction. ‐Boc‐Protected Oxindoles to Nitroalkenes Catalyzed by a Chiral Secondary Amine. 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