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Rénio M, Murtinho D, Ventura MR. New bifunctional 1,3-diamine organocatalysts derived from (+)-camphoric acid for asymmetric Michael addition of 1,3-dicarbonyl compounds to nitroolefins. Chirality 2022; 34:782-795. [PMID: 35166402 DOI: 10.1002/chir.23424] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 01/20/2022] [Indexed: 02/05/2023]
Abstract
Novel 1,3-diamine-derived bifunctional thiourea and squaramide organocatalysts were synthesized from (+)-camphoric acid. These catalysts were easily obtained in up to two to five synthetic steps, in a flexible approach that facilitates their structure variation. Their catalytic activity was examined in the asymmetric Michael addition of 1,3-dicarbonyl compounds to several trans-β-nitrostyrenes. Yields up to 98% and enantiomeric excesses up to 74% and high diastereoselectivities when applicable (dr up to 93:7) were obtained in these reactions showing that 1,3-diamine-derived bifunctional thioureas are efficient organocatalysts.
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Affiliation(s)
- Márcia Rénio
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Oeiras, Portugal
- Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade de Coimbra, Coimbra, Portugal
| | - Dina Murtinho
- Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade de Coimbra, Coimbra, Portugal
| | - M Rita Ventura
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Oeiras, Portugal
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2
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Ričko S, Požgan F, Štefane B, Svete J, Golobič A, Grošelj U. Stereodivergent Synthesis of Camphor-Derived Diamines and Their Application as Thiourea Organocatalysts. Molecules 2020; 25:molecules25132978. [PMID: 32610466 PMCID: PMC7412124 DOI: 10.3390/molecules25132978] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 06/26/2020] [Accepted: 06/27/2020] [Indexed: 11/16/2022] Open
Abstract
A series of 18 regio- and stereo-chemically diverse chiral non-racemic 1,2-, 1,3-, and 1,4-diamines have been synthesized from commercial (1S)-(+)-ketopinic acid and (1S)-(+)-10-camphorsulfonic acid. The structures of the diamines are all based on the d-(+)-camphor scaffold and feature isomeric diversity in terms of regioisomeric attachment of the primary and the tertiary amine function and the exo/endo-isomerism. Diamines were transformed into the corresponding noncovalent bifunctional thiourea organocatalysts, which have been evaluated for catalytic activity in the conjugative addition of 1,3-dicarbonyl nucleophiles (dimethyl malonate, acetylacetone, and dibenzoylmethane) to trans-β-nitrostyrene. The highest enantioselectivity was achieved in the reaction with acetylacetone as nucleophile using endo-1,3-diamine derived catalyst 52 (91.5:8.5 er). All new organocatalysts 48-63 have been fully characterized. The structures and the absolute configurations of eight intermediates and thiourea derivative 52 were also determined by X-ray diffraction.
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3
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Innovative catalysis in Michael addition reactions for C-X bond formation. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2020.110814] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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4
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Cunningham L, Benson A, Guiry PJ. Recent developments in the synthesis and applications of chiral ferrocene ligands and organocatalysts in asymmetric catalysis. Org Biomol Chem 2020; 18:9329-9370. [DOI: 10.1039/d0ob01933j] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
This review highlights recent advances in the synthesis and application of ferrocene-containing chiral ligands and organocatalysts in asymmetric catalysis.
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Affiliation(s)
- Laura Cunningham
- Synthesis and Solid State Pharmaceutical Centre
- Centre for Synthesis and Chemical Biology
- School of Chemistry
- University College Dublin
- Dublin 4
| | - Annette Benson
- Centre for Synthesis and Chemical Biology
- School of Chemistry
- University College Dublin
- Dublin 4
- Ireland
| | - Patrick J. Guiry
- Synthesis and Solid State Pharmaceutical Centre
- Centre for Synthesis and Chemical Biology
- School of Chemistry
- University College Dublin
- Dublin 4
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5
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Zhou X, Nie H, Liu X, Long X, Jiang R, Chen W. Ferrocene-based bifunctional organocatalyst for highly enantioselective intramolecular Rauhut–Currier reaction. CATAL COMMUN 2019. [DOI: 10.1016/j.catcom.2018.12.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
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6
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Yao W, Zhu J, Zhou X, Jiang R, Wang P, Chen W. Ferrocenophane-based bifunctional organocatalyst for highly enantioselective Michael reactions. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.06.036] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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7
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Zhu JC, Cui DX, Li YD, Jiang R, Chen WP, Wang PA. Ferrocene as a Privileged Framework for Chiral Organocatalysts. ChemCatChem 2018. [DOI: 10.1002/cctc.201701362] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Jun-Chao Zhu
- Department of Medicinal Chemistry, School of Pharmacy; Fourth Military Medical University; Changle West Road 169 Xi'an 710032 P.R. China
| | - Dong-Xiao Cui
- Department of Authentication of Traditional Chinese Medicine, College of Pharmacy; Shaanxi University of Chinese Medicine; Shiji Ave. Xi'an-Xianyang New Economic Zone 712046 P.R. China
| | - Yue-Dan Li
- Department of Medicinal Chemistry, School of Pharmacy; Fourth Military Medical University; Changle West Road 169 Xi'an 710032 P.R. China
| | - Ru Jiang
- Department of Medicinal Chemistry, School of Pharmacy; Fourth Military Medical University; Changle West Road 169 Xi'an 710032 P.R. China
| | - Wei-Ping Chen
- Department of Medicinal Chemistry, School of Pharmacy; Fourth Military Medical University; Changle West Road 169 Xi'an 710032 P.R. China
| | - Ping-An Wang
- Department of Medicinal Chemistry, School of Pharmacy; Fourth Military Medical University; Changle West Road 169 Xi'an 710032 P.R. China
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8
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Yao L, Nie H, Zhang D, Wang L, Zhang Y, Chen W, Li Z, Liu X, Zhang S. Chiral Ferrocenyl N,N Ligands with Intramolecular Hydrogen Bonds for Highly Enantioselective Allylic Alkylations. ChemCatChem 2018. [DOI: 10.1002/cctc.201701461] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Lin Yao
- Department of Medicinal Chemistry; School of Pharmacy; Fourth Military Medical University; 169 Changle West Road Xi'an 710032 P.R. China
| | - Huifang Nie
- Department of Medicinal Chemistry; School of Pharmacy; Fourth Military Medical University; 169 Changle West Road Xi'an 710032 P.R. China
| | - Dongxu Zhang
- Department of Medicinal Chemistry; School of Pharmacy; Fourth Military Medical University; 169 Changle West Road Xi'an 710032 P.R. China
| | - Libin Wang
- Department of Medicinal Chemistry; School of Pharmacy; Fourth Military Medical University; 169 Changle West Road Xi'an 710032 P.R. China
| | - Yuhao Zhang
- Department of Medicinal Chemistry; School of Pharmacy; Fourth Military Medical University; 169 Changle West Road Xi'an 710032 P.R. China
| | - Weiping Chen
- Department of Medicinal Chemistry; School of Pharmacy; Fourth Military Medical University; 169 Changle West Road Xi'an 710032 P.R. China
| | - Zhenhua Li
- Department of Chemistry; Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials; Fudan University; 220 Handan Road Shanghai 200433 P.R. China
| | - Xueying Liu
- Department of Medicinal Chemistry; School of Pharmacy; Fourth Military Medical University; 169 Changle West Road Xi'an 710032 P.R. China
| | - Shengyong Zhang
- Department of Medicinal Chemistry; School of Pharmacy; Fourth Military Medical University; 169 Changle West Road Xi'an 710032 P.R. China
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9
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Zhu J, Cui D, Li Y, He J, Chen W, Wang P. Enantioselective amination of nitroolefins under base-free and water-rich conditions using chiral bifunctional phase-transfer catalysts. Org Biomol Chem 2018; 16:3012-3017. [PMID: 29633771 DOI: 10.1039/c8ob00583d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly enantioselective amination of nitroolefins was realized with l-tert-leucine derived squaramide-scaffold bifunctional phase-transfer catalysts under base-free and water-rich conditions.
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Affiliation(s)
- Junchao Zhu
- Department of Medicinal Chemistry
- School of Pharmacy
- The Fourth Military Medical University
- Xi'an
- P. R. China
| | - Dongxiao Cui
- Department of Authentication of Traditional Chinese Medicine
- College of Pharmacy
- Shaanxi University of Chinese Medicine
- Xiyang
- P. R. China
| | - Yuedan Li
- Department of Medicinal Chemistry
- School of Pharmacy
- The Fourth Military Medical University
- Xi'an
- P. R. China
| | - Jingxu He
- Department of Medicinal Chemistry
- School of Pharmacy
- The Fourth Military Medical University
- Xi'an
- P. R. China
| | - Weiping Chen
- Department of Medicinal Chemistry
- School of Pharmacy
- The Fourth Military Medical University
- Xi'an
- P. R. China
| | - Pingan Wang
- Department of Medicinal Chemistry
- School of Pharmacy
- The Fourth Military Medical University
- Xi'an
- P. R. China
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10
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Andrés JM, Losada J, Maestro A, Rodríguez-Ferrer P, Pedrosa R. Supported and Unsupported Chiral Squaramides as Organocatalysts for Stereoselective Michael Additions: Synthesis of Enantiopure Chromenes and Spirochromanes. J Org Chem 2017; 82:8444-8454. [PMID: 28738149 DOI: 10.1021/acs.joc.7b01177] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Novel supported chiral bifunctional squaramides have been easily prepared starting from diamines derived from natural amino acids and commercially available aminoalkyl polystyrene resins. These squaramides behave as excellent stereoselective recoverable organocatalysts in different Michael additions, in neat conditions at room temperature. The reaction on 2-(2-nitrovinyl) phenol as electrophile lead, in excellent yields and enantioselectivities, to intermediates that can be easily transformed into 4H-chromenes, and spirochromanones.
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Affiliation(s)
- José M Andrés
- Instituto CINQUIMA and Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Valladolid , Paseo de Belén 7, 47011 Valladolid, Spain
| | - Jorge Losada
- Instituto CINQUIMA and Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Valladolid , Paseo de Belén 7, 47011 Valladolid, Spain
| | - Alicia Maestro
- Instituto CINQUIMA and Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Valladolid , Paseo de Belén 7, 47011 Valladolid, Spain
| | - Patricia Rodríguez-Ferrer
- Instituto CINQUIMA and Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Valladolid , Paseo de Belén 7, 47011 Valladolid, Spain
| | - Rafael Pedrosa
- Instituto CINQUIMA and Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Valladolid , Paseo de Belén 7, 47011 Valladolid, Spain
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11
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Matsunaga H, Tajima D, Kawauchi T, Yasuyama T, Ando S, Ishizuka T. A dramatic synergistic effect of a flexible achiral linker on a rigid chiral cis-1,2-diamine bifunctional organocatalyst. Org Biomol Chem 2017; 15:2892-2896. [DOI: 10.1039/c6ob02743a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The combination of a “rigid” chiral bicyclic cis-1,2-diamine skeleton and a “flexible” achiral linker was newly designed as a bifunctional organocatalyst framework and showed excellent catalytic activity, accompanied by the reversal of enantioselection.
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Affiliation(s)
| | - Daisuke Tajima
- Faculty of Life Sciences
- Kumamoto University
- Kumamoto 862-0973
- Japan
| | - Tetsuro Kawauchi
- Faculty of Life Sciences
- Kumamoto University
- Kumamoto 862-0973
- Japan
| | - Takuro Yasuyama
- Faculty of Life Sciences
- Kumamoto University
- Kumamoto 862-0973
- Japan
| | - Shin Ando
- Faculty of Life Sciences
- Kumamoto University
- Kumamoto 862-0973
- Japan
| | - Tadao Ishizuka
- Faculty of Life Sciences
- Kumamoto University
- Kumamoto 862-0973
- Japan
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12
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Ričko S, Svete J, Štefane B, Perdih A, Golobič A, Meden A, Grošelj U. 1,3-Diamine-Derived Bifunctional Organocatalyst Prepared from Camphor. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600498] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Sebastijan Ričko
- Faculty of Chemistry and Chemical Technology; University of Ljubljana; Večna pot 113 SI-1000 Ljubljana Slovenia
| | - Jurij Svete
- Faculty of Chemistry and Chemical Technology; University of Ljubljana; Večna pot 113 SI-1000 Ljubljana Slovenia
| | - Bogdan Štefane
- Faculty of Chemistry and Chemical Technology; University of Ljubljana; Večna pot 113 SI-1000 Ljubljana Slovenia
| | - Andrej Perdih
- National Institute of Chemistry; Hajdrihova 19 SI-1000 Ljubljana Slovenia
| | - Amalija Golobič
- Faculty of Chemistry and Chemical Technology; University of Ljubljana; Večna pot 113 SI-1000 Ljubljana Slovenia
| | - Anže Meden
- Faculty of Chemistry and Chemical Technology; University of Ljubljana; Večna pot 113 SI-1000 Ljubljana Slovenia
| | - Uroš Grošelj
- Faculty of Chemistry and Chemical Technology; University of Ljubljana; Večna pot 113 SI-1000 Ljubljana Slovenia
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13
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Li C, Ma PF, Lei Y, Chen H, Guan SY, Jiang R, Chen WP. Enantioselective Morita–Baylis–Hillman Reaction of Acrylates with Nitrobenzaldehydes Promoted by the Bifunctional Ferrocene-Based Phosphinothiourea Organocatalysts. Catal Letters 2016. [DOI: 10.1007/s10562-016-1759-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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14
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D'Antona N, Morrone R, Gambera G, Pedotti S. Enantiorecognition of planar "metallocenic" chirality by a nitrile hydratase/amidase bienzymatic system. Org Biomol Chem 2016; 14:4393-9. [PMID: 27116228 DOI: 10.1039/c6ob00689b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
For the first time, a bacterial strain expressing a nitrile hydratase/amidase activity was able to recognize a planar element of chirality: Rhodococcus rhodochrous PA-34 whole cells catalysed with a high level of enantioselectivity the biotransformation of a novel nitrile ferrocene derivative into its corresponding amide and/or acid. An important parameter in the enzymatic recognition is the choice of the inducer selected for the bacterial growth phase.
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Affiliation(s)
- N D'Antona
- CNR National Research Council of Italy - Institute of Biomolecular Chemistry, Via P-Gaifami 18, Catania, Italy.
| | - R Morrone
- CNR National Research Council of Italy - Institute of Biomolecular Chemistry, Via P-Gaifami 18, Catania, Italy.
| | - G Gambera
- CNR National Research Council of Italy - Institute of Biomolecular Chemistry, Via P-Gaifami 18, Catania, Italy.
| | - S Pedotti
- CNR National Research Council of Italy - Institute of Biomolecular Chemistry, Via P-Gaifami 18, Catania, Italy.
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15
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Mo YZ, Nie HF, Lei Y, Zhang DX, Li XY, Zhang SY, Wang QF. Asymmetric transfer hydrogenation of γ-aryl α,γ-dioxo-butyric acid esters. RSC Adv 2016. [DOI: 10.1039/c6ra02500e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Six ferrocene-based chiral ligands were prepared and applied in ATH reaction of multiple-carbonyl compounds as RuCl(p-cymene)[Ts-DPEN] did.
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Affiliation(s)
- Yuan-Zhao Mo
- Department of Medicinal Chemistry
- School of Pharmacy
- The Fourth Military Medical University
- Xi'an
- P. R. China
| | - Hui-Fang Nie
- Department of Medicinal Chemistry
- School of Pharmacy
- The Fourth Military Medical University
- Xi'an
- P. R. China
| | - Yang Lei
- Department of Medicinal Chemistry
- School of Pharmacy
- The Fourth Military Medical University
- Xi'an
- P. R. China
| | - Dong-Xu Zhang
- Department of Medicinal Chemistry
- School of Pharmacy
- The Fourth Military Medical University
- Xi'an
- P. R. China
| | - Xiao-Ye Li
- Department of Medicinal Chemistry
- School of Pharmacy
- The Fourth Military Medical University
- Xi'an
- P. R. China
| | - Sheng-Yong Zhang
- Department of Medicinal Chemistry
- School of Pharmacy
- The Fourth Military Medical University
- Xi'an
- P. R. China
| | - Qiao-Feng Wang
- Department of Medicinal Chemistry
- School of Pharmacy
- The Fourth Military Medical University
- Xi'an
- P. R. China
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16
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Ren X, He C, Feng Y, Chai Y, Yao W, Chen W, Zhang S. Novel ferrocene-based bifunctional amine-thioureas for asymmetric Michael addition of acetylacetone to nitroolefins. Org Biomol Chem 2015; 13:5054-60. [PMID: 25832649 DOI: 10.1039/c5ob00298b] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
An efficient method was developed to synthesize ferrocene-based bifunctional amine-thioureas bearing multiple hydrogen-bonding donors. Asymmetric Michael addition of acetylacetone to nitroolefins catalyzed by these novel bifunctional catalysts affords the Michael adducts in high yield and moderate to excellent enantioselectivities. Multiple hydrogen-bonds play an important role in accelerating the reaction.
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Affiliation(s)
- Xiaochen Ren
- Key Laboratory of Applied Surface and Colloid Chemistry, School of Chemistry and Chemical Engineering Shaanxi Normal University, Xi'an, Shaanxi 710062, P.R. China.
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17
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Liu R, Zhou G, Hall TH, Clarkson GJ, Wills M, Chen W. Practical Access to Planar Chiral 1,2-(α-Ketotetramethylene)- ferrocene by Non-Enzymatic Kinetic Resolution and Conclusive Confirmation of its Absolute Configuration. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500728] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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18
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Lai Q, Li Y, Gong Z, Liu Q, Wei C, Song Z. Novel Chiral Bifunctional L-Thiazoline-Thiourea Derivatives: Design and Application in Enantioselective Michael Reactions. Chirality 2015; 27:979-88. [PMID: 26427336 DOI: 10.1002/chir.22540] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Revised: 08/30/2015] [Accepted: 09/02/2015] [Indexed: 11/06/2022]
Abstract
Several novel chiral bifunctional L-thiazoline-thiourea derivatives were easily synthesized from commercially available L-cysteine in high yield. These catalysts were subsequently applied to the enantioselective Michael addition of acetylacetone to β-nitrostyrenes. The products with S configuration were obtained in 98% enantiomeric excess (ee) when the L-thiazoline-thiourea derivatives were used. A plausible transition state model is proposed to explain the observed enantioselectivities.
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Affiliation(s)
- Qi Lai
- Department of Organic Chemistry, College of Chemistry, Jilin University, Changchun, China
| | - Yang Li
- Department of Organic Chemistry, College of Chemistry, Jilin University, Changchun, China
| | - Zhiyong Gong
- Department of Organic Chemistry, College of Chemistry, Jilin University, Changchun, China
| | - Qingwen Liu
- Department of Organic Chemistry, College of Chemistry, Jilin University, Changchun, China
| | - Chiyu Wei
- Department of Organic Chemistry, College of Chemistry, Jilin University, Changchun, China
| | - Zhiguang Song
- Department of Organic Chemistry, College of Chemistry, Jilin University, Changchun, China
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19
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Zhou MJ, Li Y, Dang L. Theoretical Studies on the Mechanism of the Michael Addition Reaction Catalyzed by a Thiourea-Cinchona-Amine: Triple Activation. ASIAN J ORG CHEM 2015. [DOI: 10.1002/ajoc.201500183] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Mei-Juan Zhou
- Department of Chemistry; South University of Science and Technology of China; Shenzhen 518055 P. R. China
| | - Yun Li
- Department of Chemistry; South University of Science and Technology of China; Shenzhen 518055 P. R. China
| | - Li Dang
- Department of Chemistry; South University of Science and Technology of China; Shenzhen 518055 P. R. China
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20
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Rao MN, Haridas M, Gangwar MK, Rajakannu P, Kalita AC, Ghosh P. Asymmetric Base-Free Michael Addition at Room Temperature with Nickel-Based Bifunctional Amido-Functionalized N-Heterocyclic Carbene Catalysts. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201403224] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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21
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Ma J, Li C, Zhang D, Lei Y, Li M, Jiang R, Chen W. A new type of ferrocene-based phosphine-tert-butylsulfinamide ligand: synthesis and application in asymmetric catalysis. RSC Adv 2015. [DOI: 10.1039/c5ra03010b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The first example of P,S-bidentate ligands containing both a planar chiral scaffold and a chiral sulfinamide moiety were reported.
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Affiliation(s)
- Jiangwei Ma
- School of Pharmacy
- Fourth Military Medical University
- Xi'an
- PR China
| | - Chuang Li
- School of Pharmacy
- Fourth Military Medical University
- Xi'an
- PR China
| | - Dongxu Zhang
- School of Pharmacy
- Fourth Military Medical University
- Xi'an
- PR China
| | - Yang Lei
- School of Pharmacy
- Fourth Military Medical University
- Xi'an
- PR China
| | - Muqiong Li
- School of Pharmacy
- Fourth Military Medical University
- Xi'an
- PR China
| | - Ru Jiang
- School of Pharmacy
- Fourth Military Medical University
- Xi'an
- PR China
| | - Weiping Chen
- School of Pharmacy
- Fourth Military Medical University
- Xi'an
- PR China
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