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Liao J, Tong J, Liu L, Ouyang L, Luo R. Construction of N-Aryl-Substituted Pyrrolidines by Successive Reductive Amination of Diketones via Transfer Hydrogenation. Molecules 2024; 29:2565. [PMID: 38893441 PMCID: PMC11173526 DOI: 10.3390/molecules29112565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2024] [Revised: 05/19/2024] [Accepted: 05/21/2024] [Indexed: 06/21/2024] Open
Abstract
N-aryl-substituted pyrrolidines are important moieties widely found in bioactive substances and drugs. Herein, we present a practical reductive amination of diketones with anilines for the synthesis of N-aryl-substituted pyrrolidines in good to excellent yields. In this process, the N-aryl-substituted pyrrolidines were furnished via successive reductive amination of diketones via iridium-catalyzed transfer hydrogenation. The scale-up performance, water as a solvent, simple operation, as well as derivation of drug molecules showcased the potential application in organic synthesis.
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Affiliation(s)
- Jianhua Liao
- School of Pharmaceutical Sciences, Gannan Medical University, Ganzhou 341000, China; (J.L.); (J.T.); (L.L.); (L.O.)
| | - Jinghui Tong
- School of Pharmaceutical Sciences, Gannan Medical University, Ganzhou 341000, China; (J.L.); (J.T.); (L.L.); (L.O.)
| | - Liang Liu
- School of Pharmaceutical Sciences, Gannan Medical University, Ganzhou 341000, China; (J.L.); (J.T.); (L.L.); (L.O.)
| | - Lu Ouyang
- School of Pharmaceutical Sciences, Gannan Medical University, Ganzhou 341000, China; (J.L.); (J.T.); (L.L.); (L.O.)
| | - Renshi Luo
- School of Pharmaceutical Sciences, Gannan Medical University, Ganzhou 341000, China; (J.L.); (J.T.); (L.L.); (L.O.)
- College of Chemistry and Environmental Engineering, Shaoguan University, Shaoguan 512005, China
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Liu L, Luo R, Tong J, Liao J. Iridium-catalysed reductive allylic amination of α,β-unsaturated aldehydes. Org Biomol Chem 2024; 22:585-589. [PMID: 38131265 DOI: 10.1039/d3ob01753b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
Allylic amination is a powerful tool for constructing N-allylic amines widely found in bioactive molecules. Generally, allylic alcohols and unsaturated hydrocarbons have been considered for allylic amination reactions to minimize waste production. Herein, we present an iridium-catalysed method for reductive allylic amination of α,β-unsaturated aldehydes with amines to afford N-allylic amines under air conditions. This protocol is demonstrated to provide products from many substrates (41 examples) in moderate-to-excellent yields. This synthetic methodology is also highlighted by the synthesis of drug molecules, optically pure products, as well as scale-up experiments.
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Affiliation(s)
- Liang Liu
- School of Pharmacy, Gannan Medical University, Ganzhou, 341000, Jiangxi Province, P. R. China.
| | - Renshi Luo
- College of Chemistry and Environmental Engineering, Shaoguan University, Shaoguan, 512005, Guangdong Province, P. R. China
| | - Jinghui Tong
- School of Pharmacy, Gannan Medical University, Ganzhou, 341000, Jiangxi Province, P. R. China.
| | - Jianhua Liao
- School of Pharmacy, Gannan Medical University, Ganzhou, 341000, Jiangxi Province, P. R. China.
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Shui L, Liu F, Wang X, Ma C, Qiang Q, Shen M, Fang Y, Ni SF, Rong ZQ. Ligand-Induced chemodivergent nickel-catalyzed annulations via tandem isomerization/esterification and direct O-allylic substitution: Divergent access to 3,4-dihydrocoumarins and 2H-chromenes. J Catal 2023. [DOI: 10.1016/j.jcat.2023.03.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
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Chakraborty S, Mondal R, Pal S, Guin AK, Roy L, Paul ND. Zn(II)-Catalyzed Selective N-Alkylation of Amines with Alcohols Using Redox Noninnocent Azo-Aromatic Ligand as Electron and Hydrogen Reservoir. J Org Chem 2023; 88:771-787. [PMID: 36577023 DOI: 10.1021/acs.joc.2c01773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
We report a sustainable and eco-friendly approach for selective N-alkylation of various amines by alcohols, catalyzed by a well-defined Zn(II)-catalyst, Zn(La)Cl2 (1a), bearing a tridentate arylazo scaffold. A total of 57 N-alkylated amines were prepared in good to excellent yields, out of which 17 examples are new. The Zn(II)-catalyst shows wide functional group tolerance, is compatible with the synthesis of dialkylated amines via double N-alkylation of diamines, and produces the precursors in high yields for the marketed drugs tripelennamine and thonzonium bromide in gram-scale reactions. Control reactions and DFT studies indicate that electron transfer events occur at the azo-chromophore throughout the catalytic process, which shuttles between neutral azo, one-electron reduced azo-anion radical, and two-electron reduced hydrazo forms acting both as electron and hydrogen reservoir, enabling the Zn(II)-catalyst for N-alkylation reaction.
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Affiliation(s)
- Subhajit Chakraborty
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Botanic Garden, Howrah 711103, India
| | - Rakesh Mondal
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Botanic Garden, Howrah 711103, India
| | - Subhasree Pal
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Botanic Garden, Howrah 711103, India
| | - Amit Kumar Guin
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Botanic Garden, Howrah 711103, India
| | - Lisa Roy
- Institute of Chemical Technology Mumbai - IOC Odisha Campus Bhubaneswar, Bhubaneswar 751013, India
| | - Nanda D Paul
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Botanic Garden, Howrah 711103, India
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Iridium-catalyzed reductive amination of carboxylic acids. J Catal 2023. [DOI: 10.1016/j.jcat.2023.01.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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Borthakur I, Kumari S, Kundu S. Water as a solvent: transition metal catalyzed dehydrogenation of alcohols going green. Dalton Trans 2022; 51:11987-12020. [PMID: 35894592 DOI: 10.1039/d2dt01060g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The long-established practice of using organic solvents in synthetic chemistry is currently becoming a major focus of environmental alarms as many of the chemical wastes are generated in the form of organic solvents. Recently, various alternative solvents have been recognized by the scientific community, including water, ionic liquids, supercritical fluids, glycerol, polyethylene glycol, etc. Among these alternatives, water is unquestionably an ideal solvent as it is abundant, cheap, non-toxic, and non-flammable. In the last few decades, a breakthrough has been achieved in the field of transition metal-catalyzed dehydrogenation of alcohols and the related chemistry for the sustainable synthesis of a wide range of valuable compounds. Although a large number of reports with new potential are published every year following this alcohol dehydrogenation strategy, the utilization of water as a solvent in alcohol dehydrogenation and related coupling reactions is yet to be highlighted properly. This review summarizes the advances in metal-catalyzed dehydrogenative functionalization of alcohols using water as a solvent.
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Affiliation(s)
- Ishani Borthakur
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh (U.P.), India.
| | - Saloni Kumari
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh (U.P.), India.
| | - Sabuj Kundu
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh (U.P.), India.
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Xia Y, Wang S, Miao R, Liao J, Ouyang L, Luo R. Synthesis of N-alkoxy amines and hydroxylamines via the iridium-catalyzed transfer hydrogenation of oximes. Org Biomol Chem 2022; 20:6394-6399. [PMID: 35866589 DOI: 10.1039/d2ob01084d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cationic iridium (Ir) complexes were found to catalyze the transfer hydrogenation of oximes to access N-alkoxy amines and hydroxylamines, and the reaction was accelerated by trifluoroacetic acid. The practical application of this protocol was demonstrated by a gram-scale transformation and two-step synthesis of the fungicide furmecyclox (BAS 389F) in overall yields of 92 and 85%, respectively. An asymmetric protocol using chiral Ir complexes to afford chiral N-alkoxy amines was demonstrated, but the low yields/ee obtained indicated that further development was required.
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Affiliation(s)
- Yanping Xia
- School of Pharmaceutical Sciences, Gannan Medical University, Ganzhou, Jiangxi Province, P. R. China.
| | - Sen Wang
- School of Pharmaceutical Sciences, Gannan Medical University, Ganzhou, Jiangxi Province, P. R. China.
| | - Rui Miao
- School of Pharmaceutical Sciences, Gannan Medical University, Ganzhou, Jiangxi Province, P. R. China.
| | - Jianhua Liao
- College of Chemistry and Environmental Engineering, Shaoguan University, Shaoguan 512005, China.,School of Pharmaceutical Sciences, Gannan Medical University, Ganzhou, Jiangxi Province, P. R. China.
| | - Lu Ouyang
- School of Pharmaceutical Sciences, Gannan Medical University, Ganzhou, Jiangxi Province, P. R. China.
| | - Renshi Luo
- School of Pharmaceutical Sciences, Gannan Medical University, Ganzhou, Jiangxi Province, P. R. China. .,College of Chemistry and Environmental Engineering, Shaoguan University, Shaoguan 512005, China
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Aleku GA, Titchiner GR, Roberts GW, Derrington SR, Marshall JR, Hollfelder F, Turner NJ, Leys D. Enzymatic N-Allylation of Primary and Secondary Amines Using Renewable Cinnamic Acids Enabled by Bacterial Reductive Aminases. ACS SUSTAINABLE CHEMISTRY & ENGINEERING 2022; 10:6794-6806. [PMID: 35634269 PMCID: PMC9131517 DOI: 10.1021/acssuschemeng.2c01180] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Revised: 04/25/2022] [Indexed: 06/15/2023]
Abstract
Allylic amines are a versatile class of synthetic precursors of many valuable nitrogen-containing organic compounds, including pharmaceuticals. Enzymatic allylic amination methods provide a sustainable route to these compounds but are often restricted to allylic primary amines. We report a biocatalytic system for the reductive N-allylation of primary and secondary amines, using biomass-derivable cinnamic acids. The two-step one-pot system comprises an initial carboxylate reduction step catalyzed by a carboxylic acid reductase to generate the corresponding α,β-unsaturated aldehyde in situ. This is followed by reductive amination of the aldehyde catalyzed by a bacterial reductive aminase pIR23 or BacRedAm to yield the corresponding allylic amine. We exploited pIR23, a prototype bacterial reductive aminase, self-sufficient in catalyzing formal reductive amination of α,β-unsaturated aldehydes with various amines, generating a broad range of secondary and tertiary amines accessed in up to 94% conversion under mild reaction conditions. Analysis of products isolated from preparative reactions demonstrated that only selective hydrogenation of the C=N bond had occurred, preserving the adjacent alkene moiety. This process represents an environmentally benign and sustainable approach for the synthesis of secondary and tertiary allylic amine frameworks, using renewable allylating reagents and avoiding harsh reaction conditions. The selectivity of the system ensures that bis-allylation of the alkylamines and (over)reduction of the alkene moiety are avoided.
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Affiliation(s)
- Godwin A. Aleku
- Manchester
Institute of Biotechnology, Department of Chemistry, University of Manchester, Manchester, 131 Princess Street, Manchester M1 7DN, U.K.
- Department
of Biochemistry, University of Cambridge, 80 Tennis Court Road, Cambridge CB2 1GA, U.K.
| | - Gabriel R. Titchiner
- Manchester
Institute of Biotechnology, Department of Chemistry, University of Manchester, Manchester, 131 Princess Street, Manchester M1 7DN, U.K.
| | - George W. Roberts
- Manchester
Institute of Biotechnology, Department of Chemistry, University of Manchester, Manchester, 131 Princess Street, Manchester M1 7DN, U.K.
| | - Sasha R. Derrington
- Manchester
Institute of Biotechnology, Department of Chemistry, University of Manchester, Manchester, 131 Princess Street, Manchester M1 7DN, U.K.
| | - James R. Marshall
- Manchester
Institute of Biotechnology, Department of Chemistry, University of Manchester, Manchester, 131 Princess Street, Manchester M1 7DN, U.K.
| | - Florian Hollfelder
- Department
of Biochemistry, University of Cambridge, 80 Tennis Court Road, Cambridge CB2 1GA, U.K.
| | - Nicholas J. Turner
- Manchester
Institute of Biotechnology, Department of Chemistry, University of Manchester, Manchester, 131 Princess Street, Manchester M1 7DN, U.K.
| | - David Leys
- Manchester
Institute of Biotechnology, Department of Chemistry, University of Manchester, Manchester, 131 Princess Street, Manchester M1 7DN, U.K.
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Chen TR, Chen YT, Chen YS, Lee WJ, Lin YH, Wang HC. Iridium/graphene nanostructured catalyst for the N-alkylation of amines to synthesize nitrogen-containing derivatives and heterocyclic compounds in a green process. RSC Adv 2022; 12:4760-4770. [PMID: 35425512 PMCID: PMC8981502 DOI: 10.1039/d1ra09052f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Accepted: 01/20/2022] [Indexed: 12/15/2022] Open
Abstract
The unprecedented iridium/graphene nanostructured catalyst directly promotes the formation of C–N bonds without the need for pre-activation steps, solvents, alkalis and other additives.
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Affiliation(s)
- Tsun-Ren Chen
- Department of Applied Chemistry, National Ping Tung University, Pingtung City, Taiwan
| | - Yu-Tung Chen
- Department of Applied Chemistry, National Ping Tung University, Pingtung City, Taiwan
| | - Yi-Sheng Chen
- Department of Applied Chemistry, National Ping Tung University, Pingtung City, Taiwan
| | - Wen-Jen Lee
- Department of Applied Physics, National Ping Tung University, Pingtung City, Taiwan
| | - Yen-Hsing Lin
- Department of Applied Chemistry, National Ping Tung University, Pingtung City, Taiwan
| | - Hao-Chen Wang
- Department of Applied Chemistry, National Ping Tung University, Pingtung City, Taiwan
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