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van Beek C, Samoshin VV. Conformationally locked cis-1,2-diaminocyclohexane-based axially chiral ligands for asymmetric catalysis. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Controllable Preparation of Chiral Oxazoline-Cu(II) Catalyst as Nanoreactor for Highly Asymmetric Henry Reaction in Water. Catal Letters 2022. [DOI: 10.1007/s10562-021-03633-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Islam MM, Bhanja P, Halder M, Das A, Bhaumik A, Islam SM. Chiral Cr(III)-salen complex embedded over sulfonic acid functionalized mesoporous SBA-15 material as an efficient catalyst for the asymmetric Henry reaction. MOLECULAR CATALYSIS 2019. [DOI: 10.1016/j.mcat.2019.110489] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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A new type of L-Tertiary leucine-derived ligand: Synthesis and application in Cu(II)-catalyzed asymmetric Henry reactions. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.130469] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Ma HC, Zhao CC, Chen GJ, Dong YB. Photothermal conversion triggered thermal asymmetric catalysis within metal nanoparticles loaded homochiral covalent organic framework. Nat Commun 2019; 10:3368. [PMID: 31358761 PMCID: PMC6662712 DOI: 10.1038/s41467-019-11355-x] [Citation(s) in RCA: 81] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Accepted: 06/25/2019] [Indexed: 11/15/2022] Open
Abstract
For seeking high enantiopurity, the previously reported thermal asymmetric catalysis is usually carried out at low temperature sometimes with limited yield, that is, the high enantiomeric excess (ee) usually at the cost of high yield. Thus, the achieving both high stereoselectivity and yield is an enormous challenge. We report herein two metal nanoparticle (M NP)-loaded and porphyrin-containing homochiral covalent organic framework (CCOF)-based composite catalysts, and their application in the thermally-driven asymmetric one-pot Henry and A3-coupling reactions. All the reactions are conducted at elevated temperatures with both excellent stereoselectivity and yield which resulted from the synergy of CCOF confinement effect and M NP catalytic activation. Notably, the needed thermal energy for the asymmetric reactions herein is derived from the photothermal conversion via porphyrin-based CCOF upon irradiation with visible light. Remarkably, the CCOF confinement effect can be effectively maintained up to 100 °C for the asymmetric one-pot Henry and A3-coupling reactions herein. Achieving both high stereoselectivity and yield is a challenge for conventional asymmetric catalysis. Here, the authors report two metal nanoparticle-loaded and porphyrin-containing homochiral covalent organic framework-based composite catalysts that exhibit high stereoselectivity and yield in the thermally-driven asymmetric reactions.
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Affiliation(s)
- Hui-Chao Ma
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Normal University, Jinan, 250014, P. R. China
| | - Chen-Chen Zhao
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Normal University, Jinan, 250014, P. R. China
| | - Gong-Jun Chen
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Normal University, Jinan, 250014, P. R. China.
| | - Yu-Bin Dong
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Normal University, Jinan, 250014, P. R. China.
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Pathak G, Rajkumari K, Rokhum SL. Wealth from waste: M. acuminata peel waste-derived magnetic nanoparticles as a solid catalyst for the Henry reaction. NANOSCALE ADVANCES 2019; 1:1013-1020. [PMID: 36133185 PMCID: PMC9473269 DOI: 10.1039/c8na00321a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Accepted: 11/20/2018] [Indexed: 06/12/2023]
Abstract
Biosynthesis of nanoparticles by exploiting different plant materials has become a matter of great interest in recent years and is considered as a green technology as it does not involve any harmful and toxic chemicals in the synthetic procedure. In this paper, we report a novel one-pot M. acuminata peel ash extract mediated bio-synthesis of basic iron oxide nanoparticles (MAPAE@Fe3O4). The nanoparticles were fully characterized by different analytical techniques such as XRF, IR, XRD, XPS, SEM, TEM, VSM and TGA. The synthesized nanoparticles exhibited high basicity due to the presence of metal oxides, primarily basic K2O in the outer layer of Fe3O4 surfaces, and showed good catalytic activity for the synthesis of β-nitroalcohol via the Henry reaction at room temperature under solvent-free conditions. The catalyst was separated from the reaction medium by simply applying an external bar magnet making the process economical and less labor intensive. Furthermore, the catalyst can be reused up to the 4th cycle without much loss of its activity.
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Affiliation(s)
- Gunindra Pathak
- Department of Chemistry, National Institute of Technology, Silchar Silchar-788010 Assam India +91 3842-224797 +91 3842 242915
| | - Kalyani Rajkumari
- Department of Chemistry, National Institute of Technology, Silchar Silchar-788010 Assam India +91 3842-224797 +91 3842 242915
| | - Samuel Lalthazuala Rokhum
- Department of Chemistry, National Institute of Technology, Silchar Silchar-788010 Assam India +91 3842-224797 +91 3842 242915
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Dixit A, Kumar P, Singh S. Synthesis of chiral salalen ligands and their in-situ generated Cu-complexes for asymmetric Henry reaction. Chirality 2018; 30:1257-1268. [PMID: 30238505 DOI: 10.1002/chir.23019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 08/23/2018] [Accepted: 08/23/2018] [Indexed: 11/11/2022]
Abstract
Chiral salalen ligands derived from (S)-proline and derivatives of salicyaldehydes were synthesized, and their in-situ generated Cu (II) complexes were evaluated in the asymmetric Henry reaction. Salalen ligand of different substituents on the phenyl moiety showed remarkable effect on the enantioselectivity of nitro-aldol product of 4-nitrobenzaldehyde and nitromethane. Cu (II) complex generated in situ with (S)-2-(tert-butyl)-6-((2-(((2-hydroxy-3-methylbenzylidene)amino)methyl)pyrrolidin-1-yl)methyl) phenol (10 mol%) and Cu (OAc)2 .H2 O (10 mol%), found to be better catalyst for nitro-aldol reaction between 4-nitrobenzaldehyde and nitromethane, gave corresponding product in 85% yield and 88% enantiomeric excess (ee) in isopropanol at 35°C after 40 hours. The catalyst also used for the Henry reaction with different substituted benzaldehydes and corresponding products were obtained in 22% to 99% yields with 66% to 92% ee. Henry reaction of 4-nitrobenzaldehyde and prochiral nitroethane gave anti-selective product (dr = 79/21; anti/syn) in a 91% yield with 80% ee.
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Affiliation(s)
- Ashish Dixit
- Department of Chemistry, University of Delhi, North Campus, Delhi, India
| | - Pramod Kumar
- Department of Chemistry, University of Delhi, North Campus, Delhi, India
| | - Surendra Singh
- Department of Chemistry, University of Delhi, North Campus, Delhi, India
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Yoshizawa A, Feula A, Male L, Leach AG, Fossey JS. Rigid and concave, 2,4-cis-substituted azetidine derivatives: A platform for asymmetric catalysis. Sci Rep 2018; 8:6541. [PMID: 29695806 PMCID: PMC5916886 DOI: 10.1038/s41598-018-24784-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 03/26/2018] [Indexed: 11/25/2022] Open
Abstract
A series of single enantiomer, 2,4-cis-disubstituted amino azetidines were synthesised and used as ligands for copper-catalysed Henry reactions of aldehydes with nitromethane. Optimisation of ligand substituents and the reaction conditions was conducted. The enantiomeric excess of the formed products was highest when alkyl aldehydes were employed in the reaction (>99% e.e.). The absolute stereochemistry of one representative azetidine derivative salt was determined by analysis of the Flack parameter of an XRD single crystal structure. The origin of selectivity in catalysis was investigated computationally, revealing the importance of the amino-substituent in determining the stereochemical outcome. A racemic platinum complex of a cis-disubstituted azetidine is examined by XRD single crystal structure analysis with reference to its steric parameters, and analogies to the computationally determined copper complex catalyst are drawn. A preliminary example of the use of a cis-disubstituted azetidine scaffold in thiourea H-bonding catalyst is noted in the supporting information.
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Affiliation(s)
- Akina Yoshizawa
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham, West Midlands, B15 2TT, UK
| | - Antonio Feula
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham, West Midlands, B15 2TT, UK
| | - Louise Male
- X-Ray Crystallography Facility, School of Chemistry, University of Birmingham, Edgbaston, Birmingham, West Midlands, B15 2TT, UK
| | - Andrew G Leach
- School of Pharmacy and Biomolecular Sciences, Liverpool John Moores University, Byrom Street, Liverpool, L3 3AF, UK.
| | - John S Fossey
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham, West Midlands, B15 2TT, UK.
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Li XW, Zhang HZ, Hou GF, Xu X, Yu YH, Gao JS. Solvothermal Syntheses, Crystal Structures and Catalytic Properties of Four Chiral Compounds Built from (R)-4-(4-(1-Carboxyethoxy)penoxy) Benzoic Acids. ChemistrySelect 2017. [DOI: 10.1002/slct.201701289] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Xue-Wei Li
- School of Chemistry and Materials Science; Heilongjiang University; Harbin 150080, PR China
| | - Han-Zhong Zhang
- School of Chemistry and Materials Science; Heilongjiang University; Harbin 150080, PR China
| | - Guang-Feng Hou
- Agricultural college; Heilongjiang University; Harbin 150080, PR China
| | - Xin Xu
- School of Chemistry and Materials Science; Heilongjiang University; Harbin 150080, PR China
| | - Ying-Hui Yu
- School of Chemistry and Materials Science; Heilongjiang University; Harbin 150080, PR China
| | - Jin-Sheng Gao
- School of Chemistry and Materials Science; Heilongjiang University; Harbin 150080, PR China
- Agricultural college; Heilongjiang University; Harbin 150080, PR China
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