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Kong W, Huang C, Zhou L, Gao J, Ma L, Liu Y, Jiang Y. Modularization of Immobilized Multienzyme Cascades for Continuous-Flow Enantioselective C-H Amination. Angew Chem Int Ed Engl 2024; 63:e202407778. [PMID: 38871651 DOI: 10.1002/anie.202407778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Revised: 06/08/2024] [Accepted: 06/13/2024] [Indexed: 06/15/2024]
Abstract
Multienzyme cascades (MECs) have gained much attention in synthetic chemistry but remain far from being a reliable synthetic tool. Here we report a four-enzyme cascade comprising a cofactor-independent and a cofactor self-sustaining bienzymatic modules for the enantioselective benzylic C-H amination of arylalkanes, a challenging transformation from bulk chemicals to high value-added chiral amines. The two modules were subsequently optimized by enzyme co-immobilization with microenvironmental tuning, and finally integrated in a gas-liquid segmented flow system, resulting in simultaneous improvements in enzyme performance, mass transfer, system compatibility, and productivity. The flow system enabled continuous C-H amination of arylalkanes (up to 100 mM) utilizing the sole cofactor NADH (0.5 mM) in >90 % conversion, achieving a high space-time yield (STY) of 3.6 g ⋅ L-1 ⋅ h-1, which is a 90-fold increase over the highest value previously reported.
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Affiliation(s)
- Weixi Kong
- School of Chemical Engineering and Technology, Hebei University of Technology, No. 8 Guangrong Road, Hongqiao District, 300130, Tianjin, China
| | - Chen Huang
- School of Chemical Engineering and Technology, Hebei University of Technology, No. 8 Guangrong Road, Hongqiao District, 300130, Tianjin, China
| | - Liya Zhou
- School of Chemical Engineering and Technology, Hebei University of Technology, No. 8 Guangrong Road, Hongqiao District, 300130, Tianjin, China
| | - Jing Gao
- School of Chemical Engineering and Technology, Hebei University of Technology, No. 8 Guangrong Road, Hongqiao District, 300130, Tianjin, China
| | - Li Ma
- School of Chemical Engineering and Technology, Hebei University of Technology, No. 8 Guangrong Road, Hongqiao District, 300130, Tianjin, China
| | - Yunting Liu
- School of Chemical Engineering and Technology, Hebei University of Technology, No. 8 Guangrong Road, Hongqiao District, 300130, Tianjin, China
| | - Yanjun Jiang
- School of Chemical Engineering and Technology, Hebei University of Technology, No. 8 Guangrong Road, Hongqiao District, 300130, Tianjin, China
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2
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Gao Q, Xu WC, Nie X, Bian KJ, Yuan HR, Zhang W, Wu BB, Wang XS. Regio- and enantioselective nickel-alkyl catalyzed hydroalkylation of alkynes. Nat Commun 2024; 15:6556. [PMID: 39095386 PMCID: PMC11297161 DOI: 10.1038/s41467-024-50947-0] [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: 05/07/2024] [Accepted: 07/23/2024] [Indexed: 08/04/2024] Open
Abstract
The migratory insertion of metal-hydride into alkene has allowed regioselective access to organometallics, readily participating in subsequent functionalization as one conventional pathway of hydroalkylation, whereas analogous process with feedstock alkyne is drastically less explored. Among few examples, the regioselectivity of metal-hydride insertion is mostly governed by electronic bias of alkynes. To alter the regioselectivity and drastically expand the intermediate pools that we can access, one aspirational design is through alternative nickel-alkyl insertion, providing opposite regioselectivity induced by steric demand. Leveraging in situ formed nickel-alkyl species, we herein report the regio- and enantioselective hydroalkylation of alkynes with broad functional group tolerance, excellent regio- and enantioselectivity, enabling efficient route to diverse valuable chiral allylic amines motifs. Preliminary mechanistic studies indicate the aminoalkyl radical species can participate in metal-capture and lead to formation of nickel-alkyl, of which the migratory insertion is key to reverse regioselectivity observed in metal-hydride insertion.
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Affiliation(s)
- Qian Gao
- Department of Pharmacy, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
- Department of Chemistry, University of Science and Technology of China, Hefei, China
| | - Wei-Cheng Xu
- Department of Chemistry, University of Science and Technology of China, Hefei, China
| | - Xuan Nie
- Department of Pharmacy, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Kang-Jie Bian
- Department of Chemistry, University of Science and Technology of China, Hefei, China
| | - Hong-Rui Yuan
- Department of Chemistry, University of Science and Technology of China, Hefei, China
| | - Wen Zhang
- Department of Chemistry, University of Science and Technology of China, Hefei, China
| | - Bing-Bing Wu
- Department of Chemistry, University of Science and Technology of China, Hefei, China.
| | - Xi-Sheng Wang
- Department of Pharmacy, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China.
- Department of Chemistry, University of Science and Technology of China, Hefei, China.
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3
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Zhou L, Li C, Dong L, Liu Y, He Y, Liu G, Bai J, Ma L, Jiang Y. Construction of Multi-Enzyme Integrated Catalysts for Deracemization of Cyclic Chiral Amines. Chembiochem 2024; 25:e202400346. [PMID: 38775416 DOI: 10.1002/cbic.202400346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2024] [Revised: 05/19/2024] [Indexed: 07/13/2024]
Abstract
Multi-enzyme cascade catalysis has become an important technique for chemical reactions used in manufacturing and scientific study. In this research, we designed a four-enzyme integrated catalyst and used it to catalyse the deracemization reaction of cyclic chiral amines, where monoamine oxidase (MAO) catalyses the enantioselective oxidation of 1-methyl-1,2,3,4-tetrahydroisoquinoline (MTQ), imine reductase (IRED) catalyses the stereo selective reduction of 1-methyl-3,4-dihydroisoquinoline (MDQ), formate dehydrogenase (FDH) is used for the cyclic regeneration of cofactors, and catalase (CAT) is used for decomposition of oxidative reactions. The four enzymes were immobilized via polydopamine (PDA)-encapsulated dendritic organosilica nanoparticles (DONs) as carriers, resulting in the amphiphilic core-shell catalysts. The hydrophilic PDA shell ensures the dispersion of the catalyst in water, and the hydrophobic DON core creates a microenvironment with the spatial confinement effect of the organic substrate and the preconcentration effect to enhance the stability of the enzymes and the catalytic efficiency. The core-shell structure improves the stability and reusability of the catalyst and rationally arranges the position of different enzymes according to the reaction sequence to improve the cascade catalytic performance and cofactor recovery efficiency.
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Affiliation(s)
- Liya Zhou
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China
| | - Chunliu Li
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China
| | - Lele Dong
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China
| | - Yunting Liu
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China
| | - Ying He
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China
| | - Guanhua Liu
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China
| | - Jing Bai
- College of Food Science and Biology, Hebei University of Science & Technology, 26 Yuxiang Street, Yuhua District, Shijiazhuang, 050018, China
| | - Li Ma
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China
| | - Yanjun Jiang
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China
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4
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Li W, Wang C, Zhu T, Liu G, Wu J. Metal- and additive-free β-C(sp 2)-H decarboxylative alkylsulfonylation of enamides from phenyliodine(III) dicarboxylates and sulfur dioxide. Chem Commun (Camb) 2024; 60:8212-8215. [PMID: 39010756 DOI: 10.1039/d4cc02865a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/17/2024]
Abstract
A green process for the direct C(sp2)-H decarboxylative alkylsulfonylation of enamides under metal- and additive-free conditions is reported. This reaction employs phenyliodine(III) dicarboxylates as the alkyl radical precursors and DABCO·(SO2)2 as the sulfur dioxide surrogate. Diverse (E)-alkylsulfonyl enamides are generated in moderate to good yields with high stereoselectivity under extremely mild conditions via a radical process. A broad substrate scope and excellent functional group tolerance are presented. Moreover, a cascade alkylsulfonylation/cyclization reaction of N-methacryloyl enamides occurs smoothly, giving rise to various alkylsulfonylated pyrrolidones.
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Affiliation(s)
- Wenyan Li
- Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang 330013, China.
| | - Cenxin Wang
- Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang 330013, China.
| | - Tonghao Zhu
- School of Pharmaceutical and Chemical Engineering & Institute for Advanced Studies, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, China.
| | - Gang Liu
- Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang 330013, China.
| | - Jie Wu
- School of Pharmaceutical and Chemical Engineering & Institute for Advanced Studies, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, China.
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, China
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, 453007, China
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5
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Ketelboeter DR, Pappoppula M, Aponick A. Chemoselective Diazine Dearomatization: The Catalytic Enantioselective Dearomatization of Pyrazine. J Am Chem Soc 2024; 146:11610-11615. [PMID: 38619328 DOI: 10.1021/jacs.4c02979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/16/2024]
Abstract
Despite much progress in the area of dearomatization, the enantioselective dearomatization of heterocycles is limited to those with a single heteroatom. Here we report a highly enantioselective copper-catalyzed dearomatization of pyrazine, a diazine, leading to chiral C-substituted piperazines. When exposed to a chloroformate and an alkyne in the presence of a catalyst derived from a copper salt and the chiral ligand StackPhos, pyrazine is readily dearomatized to provide a 2,3-disubstituted dihydropyrazine as single diastereomer in high enantiomeric excess. Mechanistic studies support a noninnocent involvement of chloride ion preventing a second iminium alkynylation, thus enabling subsequent functionalization at the second reactive site. The synthetically useful dihydropyrazine products, obtained in up to 95% yield and 99% ee, can be further manipulated to form optically active C-substituted piperazines and C1-symmetric 1,2-diamines.
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Affiliation(s)
- Devin R Ketelboeter
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Mukesh Pappoppula
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Aaron Aponick
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
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6
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Lu YN, Che C, Zhen G, Chang X, Dong XQ, Wang CJ. Visible-light-enabled stereoselective synthesis of functionalized cyclohexylamine derivatives via [4 + 2] cycloadditions. Chem Sci 2024; 15:6507-6514. [PMID: 38699278 PMCID: PMC11062095 DOI: 10.1039/d4sc00667d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Accepted: 03/26/2024] [Indexed: 05/05/2024] Open
Abstract
An unprecedented intermolecular [4 + 2] cycloaddition of benzocyclobutylamines with α-substituted vinylketones, enabled by photoredox catalysis, has been developed. The current method enables facile access to highly functionalized cyclohexylamine derivatives that were otherwise inaccessible, in moderate to good yields with excellent diastereoselectivities. This protocol has some excellent features, such as full atom economy, good functional-group compatibility, mild reaction conditions, and an overall redox-neutral process. Additionally, an asymmetric version of this cycloaddition was preliminarily investigated via the incorporation of a chiral phosphoric acid (CPA), and moderate to good enantioselectivity could be effectively realized with excellent diastereoselectivity. Synthetic applications were demonstrated via a scale-up experiment and elaborations to access amino alcohol and cyclobutene derivatives. Based on the results of control experiments, a reasonable reaction mechanism was proposed to elucidate the reaction pathway.
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Affiliation(s)
- Yi-Nan Lu
- College of Chemistry and Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Wuhan University Wuhan Hubei 430072 China
| | - Chao Che
- College of Chemistry and Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Wuhan University Wuhan Hubei 430072 China
| | - Guangjin Zhen
- College of Chemistry and Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Wuhan University Wuhan Hubei 430072 China
| | - Xin Chang
- College of Chemistry and Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Wuhan University Wuhan Hubei 430072 China
| | - Xiu-Qin Dong
- College of Chemistry and Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Wuhan University Wuhan Hubei 430072 China
| | - Chun-Jiang Wang
- College of Chemistry and Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Wuhan University Wuhan Hubei 430072 China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry Shanghai 230021 China
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7
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Yuan X, Zhang X, Zheng Z, Sun S, Jia X, Dong S. Highly active and regioselective hydroaminomethylation of olefins catalyzed by Rh/sulfoxantphos with ZSM-5. Chem Commun (Camb) 2024; 60:4667-4670. [PMID: 38591607 DOI: 10.1039/d4cc00663a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/10/2024]
Abstract
Rh-catalyzed hydroaminomethylation has been developed with acid sulfoxantphos and ZSM-5. Linear amines were obtained in good yields (71-95%) with high l/b ratios (up to 132.4) and excellent TON values (up to 23 760). The ZSM-5 and SO3H group of ligands improved the performances of hydroformylation and reductive amination.
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Affiliation(s)
- Xiaoshuang Yuan
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China.
| | - Xueqing Zhang
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China.
| | - Zhaohui Zheng
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China.
- Liaoning Sino More New Material Co., Ltd, Panjin, 124000, P. R. China
| | - Shuhui Sun
- Xianhe Oil Production Plant, SINOPEC, Dongying, 257000, P. R. China
| | - Xiaofei Jia
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China.
| | - Shuxiang Dong
- Liaoning Sino More New Material Co., Ltd, Panjin, 124000, P. R. China
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8
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Deng X, Jiang F, Wang X. Asymmetric Deoxygenative Functionalization of Secondary Amides with Vinylpyridines Enabled by a Triple Iridium-Photoredox-Chiral Phosphoric Acid System. Org Lett 2024. [PMID: 38489756 DOI: 10.1021/acs.orglett.4c00692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2024]
Abstract
An enantioselective deoxygenative functionalization of secondary amides with vinylpridines is developed by merging relay iridium catalysis and cooperative photoredox-chiral Brønsted acid catalysis, affording a series of valuable chiral amines in moderate to good yields with good enantioselectivities. The intriguing multiple catalytic system invoking triple-catalysis was found to be the key to the success of the current reactions, which may stimulate further development of catalytic methodologies for asymmetric deoxygenative transformations of amides.
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Affiliation(s)
- Xiyike Deng
- School of Chemistry and Material Sciences, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Hangzhou 310024, China
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Feng Jiang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Xiaoming Wang
- School of Chemistry and Material Sciences, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Hangzhou 310024, China
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
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9
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Booth R, Whitwood AC, Duhme-Klair AK. Effect of Ligand Substituents on Spectroscopic and Catalytic Properties of Water-Compatible Cp*Ir-(pyridinylmethyl)sulfonamide-Based Transfer Hydrogenation Catalysts. Inorg Chem 2024; 63:3815-3823. [PMID: 38343274 PMCID: PMC10900292 DOI: 10.1021/acs.inorgchem.3c04040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 01/23/2024] [Accepted: 01/30/2024] [Indexed: 02/27/2024]
Abstract
Transition-metal-based hydrogenation catalysts have applications ranging from high-value chemical synthesis to medicinal chemistry. A series of (pyridinylmethyl)sulfonamide ligands substituted with electron-withdrawing and -donating groups were synthesized to study the influence of the electronic contribution of the bidentate ligand in Cp*Ir piano-stool complexes. A variable-temperature NMR investigation revealed a strong correlation between the electron-donating ability of the substituent and the rate of stereoinversion of the complexes. This correlation was partially reflected in the catalytic activity of the corresponding catalysts. Complexes with electron-withdrawing substituents followed the trend observed in the variable-temperature NMR study, thereby confirming the rate-determining step to be donation of the hydride ligand. Strongly electron-donating groups, on the other hand, caused a change in the rate-determining step in the formation of the iridium-hydride species. These results demonstrate that the activity of these catalysts can be tuned systematically via changes in the electronic contribution of the bidentate (pyridinylmethyl)sulfonamide ligands.
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10
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Shukla PM, Pratap A, Maji B. DIBAL-H-mediated N-deacetylation of tertiary amides: synthesis of synthetically valuable secondary amines. Org Biomol Chem 2024; 22:501-505. [PMID: 38165251 DOI: 10.1039/d3ob01660a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
A rapid DIBAL-H-mediated N-deacetylation of tertiary amides is described under mild conditions, affording synthetically valuable secondary amines in good to excellent yields.
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Affiliation(s)
- Pushpendra Mani Shukla
- Department of Chemistry, Indira Gandhi National Tribal University, Amarkantak-484886, Madhya Pradesh, India.
| | - Aniruddh Pratap
- Department of Chemistry, Indira Gandhi National Tribal University, Amarkantak-484886, Madhya Pradesh, India.
| | - Biswajit Maji
- Department of Chemistry, Indira Gandhi National Tribal University, Amarkantak-484886, Madhya Pradesh, India.
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11
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Yamakawa K, Sakamoto K, Nishimura T. Iridium-catalyzed asymmetric addition of imides to alkenes. Chem Commun (Camb) 2023; 59:12871-12874. [PMID: 37817678 DOI: 10.1039/d3cc04406h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/12/2023]
Abstract
Enantioselective addition of an imide N-H bond to alkenes was realized by use of a cationic iridium catalyst. Bulky diphosphine ligands such as DTBM-segphos, DTBM-MeO-biphep, and DTBM-binap were indispensable for the reaction. A variety of styrene derivatives, allylsilanes, and norbornene were good substrates to give the corresponding chiral adducts with high enantioselectivity.
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Affiliation(s)
- Kentaro Yamakawa
- Department of Chemistry, Graduate School of Science, Osaka MetropolitanUniversity, Sumiyoshi, Osaka 558-8585, Japan.
| | - Kana Sakamoto
- Department of Chemistry, Graduate School of Science, Osaka MetropolitanUniversity, Sumiyoshi, Osaka 558-8585, Japan.
| | - Takahiro Nishimura
- Department of Chemistry, Graduate School of Science, Osaka MetropolitanUniversity, Sumiyoshi, Osaka 558-8585, Japan.
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12
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Xu G, Wang Z, Chen Y, Qin L, Zhou L. PCN/BiOCl Polymer-Based Heterojunction with Rich Chlorine Defects for Photocatalytic Amine Oxidation. Polymers (Basel) 2023; 15:4145. [PMID: 37896390 PMCID: PMC10611391 DOI: 10.3390/polym15204145] [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: 08/31/2023] [Revised: 10/15/2023] [Accepted: 10/17/2023] [Indexed: 10/29/2023] Open
Abstract
Porous carbon nitride/bismuth oxychloride (PCN/BiOCl-x) polymer-based heterojunction photocatalysts were successfully synthesized via a simple in situ hydrothermal method. A PCN/BiOCl heterojunction with rich chlorine defects is prepared by adjusting the chlorine content of the BiOCl unit in the heterojunction by changing the solvent. The as-prepared catalysts were characterized via BET, SEM, TEM, XRD, XPS and optical testing, and they were used for a photocatalytic amine oxidation reaction. The results indicated that the catalytic performance of the PCN/BiOCl heterojunction was significantly enhanced due to the rich chlorine vacancies in the samples. The enhanced catalytic activity may be attributed to the Z-scheme heterojunction, abundant chlorine defects and large specific surface area. At the same time, the catalyst circulation experiment shows that the PCN/BiOCl heterojunction has good circulation performance.
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Affiliation(s)
| | | | | | | | - Limei Zhou
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong 637002, China; (G.X.); (Z.W.); (Y.C.); (L.Q.)
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13
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Chowdhury D, Mukherjee A. Easy Access to Tertiary Amines from Carbonyl Compounds with Substituted Amine-Boranes: A Substrate, Catalyst, and Additive-Free Approach Under Mild Conditions. Chem Asian J 2023; 18:e202300661. [PMID: 37671911 DOI: 10.1002/asia.202300661] [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: 07/30/2023] [Revised: 09/01/2023] [Accepted: 09/06/2023] [Indexed: 09/07/2023]
Abstract
Tertiary amines are ubiquitous and play an essential role in organocatalysis, pharmaceuticals, and fine chemicals. Amongst various synthetic procedures known for their synthesis, the reductive amination of carbonyl compounds has been found to be a proficient method. Over the past few decades, different synthetic strategies for reductive amination have been developed. Most of them suffer from the use of transition metals and/or harsh reaction conditions. Herein, we present an efficient, operationally simple protocol for the chemoselective transformation of carbonyl compounds to tertiary amines under benign conditions. The strategy encompasses a broad substrate scope under the metal-free condition at room temperature and does not require any solvent. A detailed mechanistic investigation was performed with the aid of control experiments and computational study to shed light on the reaction pathway.
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Affiliation(s)
- Deep Chowdhury
- Department of Chemistry, Indian Institute of Technology Bhilai, GEC Campus, Sejbahar, Raipur-492015, Chhattisgarh, India
| | - Arup Mukherjee
- Department of Chemistry, Indian Institute of Technology Bhilai, GEC Campus, Sejbahar, Raipur-492015, Chhattisgarh, India
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14
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Han HJ, Park SY, Jeon SE, Kwak JS, Lee JH, Jaladi AK, Hwang H, An DK. Grignard Reagent-Catalyzed Hydroboration of Esters, Nitriles, and Imines. Molecules 2023; 28:7090. [PMID: 37894569 PMCID: PMC10609653 DOI: 10.3390/molecules28207090] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 10/10/2023] [Accepted: 10/11/2023] [Indexed: 10/29/2023] Open
Abstract
The reduction in esters, nitriles, and imines requires harsh conditions (highly reactive reagents, high temperatures, and pressures) or complex metal-ligand catalytic systems. Catalysts comprising earth-abundant and less toxic elements are desirable from the perspective of green chemistry. In this study, we developed a green hydroboration protocol for the reduction in esters, nitriles, and imines at room temperature (25 °C) using pinacolborane as the reducing agent and a commercially available Grignard reagent as the catalyst. Screening of various alkyl magnesium halides revealed MeMgCl as the optimal catalyst for the reduction. The hydroboration and subsequent hydrolysis of various esters yielded corresponding alcohols over a short reaction time (~0.5 h). The hydroboration of nitriles and imines produced various primary and secondary amines in excellent yields. Chemoselective reduction and density functional theory calculations are also performed. The proposed green hydroboration protocol eliminates the requirements for complex ligand systems and elevated temperatures, providing an effective method for the reduction in esters, nitriles, and imines at room temperature.
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Affiliation(s)
| | | | | | | | | | | | | | - Duk Keun An
- Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon 24341, Republic of Korea; (H.J.H.); (S.Y.P.); (S.E.J.); (J.S.K.); (J.H.L.); (A.K.J.); (H.H.)
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15
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Wang Y, Dana S, Long H, Xu Y, Li Y, Kaplaneris N, Ackermann L. Electrochemical Late-Stage Functionalization. Chem Rev 2023; 123:11269-11335. [PMID: 37751573 PMCID: PMC10571048 DOI: 10.1021/acs.chemrev.3c00158] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Indexed: 09/28/2023]
Abstract
Late-stage functionalization (LSF) constitutes a powerful strategy for the assembly or diversification of novel molecular entities with improved physicochemical or biological activities. LSF can thus greatly accelerate the development of medicinally relevant compounds, crop protecting agents, and functional materials. Electrochemical molecular synthesis has emerged as an environmentally friendly platform for the transformation of organic compounds. Over the past decade, electrochemical late-stage functionalization (eLSF) has gained major momentum, which is summarized herein up to February 2023.
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Affiliation(s)
| | | | | | - Yang Xu
- Institut für Organische
und Biomolekulare Chemie and Wöhler Research Institute for
Sustainable Chemistry (WISCh), Georg-August-Universität, Göttingen 37077, Germany
| | - Yanjun Li
- Institut für Organische
und Biomolekulare Chemie and Wöhler Research Institute for
Sustainable Chemistry (WISCh), Georg-August-Universität, Göttingen 37077, Germany
| | - Nikolaos Kaplaneris
- Institut für Organische
und Biomolekulare Chemie and Wöhler Research Institute for
Sustainable Chemistry (WISCh), Georg-August-Universität, Göttingen 37077, Germany
| | - Lutz Ackermann
- Institut für Organische
und Biomolekulare Chemie and Wöhler Research Institute for
Sustainable Chemistry (WISCh), Georg-August-Universität, Göttingen 37077, Germany
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16
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Chen R, Su K, Zhang Y, Zhu Y, Liu J, Xu J. Co-crystal structure provides insights on transaminase CrmG recognition amino donor L-Arg. Biochem Biophys Res Commun 2023; 675:41-45. [PMID: 37451216 DOI: 10.1016/j.bbrc.2023.07.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 07/05/2023] [Indexed: 07/18/2023]
Abstract
ω-transaminase has attracted growing attention for chiral amine synthesis, although it commonly suffers from severe by-product inhibition. ω-transaminase CrmG is critical for the biosynthesis of Caerulomycin A, a natural product that possesses broad bioactivity, including immunosuppressive and anti-cancer. Compared to L-Arg, amino donor L-Glu, L-Gln or L-Ala is more preferred by CrmG. In this study, we determined the crystal structure of CrmG in complex with amino donor L-Arg, unveiling the detailed binding mode. Specifically, L-Arg exhibits an extensive contact with aromatic residues F207 and W223 on the roof of CrmG active site via cation-π network. This interaction may render the deamination by-product of L-Arg to be an inhibitor against PMP-bound CrmG by stabilizing its flexible roof, thus reducing the reactivity of L-Arg as an amino donor for CrmG. These data provide further evidence to support our previous proposal that CrmG can overcome inhibition from those by-products that are not able to stabilize the flexible roof of active site in PMP-bound CrmG. Thus, our result can not only facilitate the biosynthesis of CRM A but also be beneficial for the rational design of ω-transaminase to bypass by-product inhibition.
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Affiliation(s)
- Rui Chen
- Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230026, China; State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China
| | - Kai Su
- Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230026, China; State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China
| | - Yulong Zhang
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China
| | - Yiguang Zhu
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, RNAM Center for Marine Microbiology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou, 510301, China
| | - Jinsong Liu
- Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230026, China; State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China.
| | - Jinxin Xu
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China.
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17
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Ma YR, Lv XJ, Dong Q, Ming YC, Liu YK. Brønsted-Acid-Catalyzed In Situ Formation of Acyclic Tertiary Enamides and Its Application to the Preparation of Diverse Nitrogen-Containing Heterocyclic Compounds. Org Lett 2023; 25:5929-5934. [PMID: 37560944 DOI: 10.1021/acs.orglett.3c01919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/11/2023]
Abstract
A Brønsted acid-catalyzed cascade process, involving in situ formation of acyclic tertiary enamides and intramolecular Michael reaction, is developed for the synthesis of functionalized cyclic tertiary enamides. Based on the dual reactivities of the enamide moiety, several reaction sequences were realized by using rationally designed substrates, leading to biologically relevant nitrogen-containing heterocyclic compounds with diverse structural skeletons in a concise and diastereocontrolled manner.
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Affiliation(s)
- Yuan-Ren Ma
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Xue-Jiao Lv
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Qing Dong
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Yong-Chao Ming
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Yan-Kai Liu
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
- Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266003, China
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18
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Jia ZH, Chen LY, Zheng H, Li ZR, Song QC, Li Y. Enantioselective Synthesis of Diarylmethylamines through the Aza-Friedel-Crafts Reaction of 1,3,5-Trialkoxy Benzenes and N-Sulfonyl Aldimines Catalyzed by BINOL-Derived Disulfonimides. J Org Chem 2023. [PMID: 37384900 DOI: 10.1021/acs.joc.3c00226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/01/2023]
Abstract
A 1,1'-bi-2-naphthol (BINOL)-derived disulfonimide (DSI)-catalyzed enantioselective aza-Friedel-Crafts reaction between 1,3,5-trialkoxy benzenes and N-sulfonyl aldimines gives direct access to a series of chiral diarylmethylamines in good yields and good to excellent enantioselectivities (up to 97% ee). This reaction provides a useful protocol for the direct synthesis of diarylmethylamine derivatives.
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Affiliation(s)
- Zi-Hao Jia
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai 201620, China
| | - Ling-Yan Chen
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai 201620, China
- Key Laboratory of Specially Functional Polymeric Materials and Related Technology (Ministry of Education), East China University of Science and Technology, Shanghai 200237, China
| | - Hao Zheng
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai 201620, China
| | - Zhang-Rui Li
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai 201620, China
| | - Qing-Chun Song
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai 201620, China
| | - Ya Li
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai 201620, China
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19
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Stagel K, Pálvölgyi ÁM, Delmas C, Schnürch M, Bica‐Schröder K. Supported Ionic Liquid Phase (SILP) Allylic Alkylation of Amines in Continuous Flow. ChemCatChem 2023; 15:e202300381. [PMID: 38504938 PMCID: PMC10947303 DOI: 10.1002/cctc.202300381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 04/06/2023] [Indexed: 03/21/2024]
Abstract
We present the use of Pd-complex-containing supported ionic liquid phases (SILPs) as a novel approach for continuous-flow allylic alkylation of N-nucleophiles. This immobilization strategy gave simple access to air-tolerating catalyst frameworks, providing rapid and convenient access to various achiral and chiral N-allylation products. Under optimized conditions, the flow-reaction could be maintained for 3.5 hours with constant product output; meanwhile, only a marginal 0.7 wt % of ionic liquid leaching and no detectable palladium-complex leaching could be observed.
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Affiliation(s)
- Kristof Stagel
- Institute of Applied Synthetic ChemistryTU WienGetreidemarkt 9/1631060WienAustria
| | - Ádám Márk Pálvölgyi
- Institute of Applied Synthetic ChemistryTU WienGetreidemarkt 9/1631060WienAustria
| | - Clémence Delmas
- Institute of Applied Synthetic ChemistryTU WienGetreidemarkt 9/1631060WienAustria
| | - Michael Schnürch
- Institute of Applied Synthetic ChemistryTU WienGetreidemarkt 9/1631060WienAustria
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20
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Chen X, Liu D, Yang C, Shi L, Li F. Hexaazatrinaphthalene-Based Covalent Triazine Framework-Supported Rhodium(III) Complex: A Recyclable Heterogeneous Catalyst for the Reductive Amination of Ketones to Primary Amines. Inorg Chem 2023. [PMID: 37285321 DOI: 10.1021/acs.inorgchem.3c00301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The development of efficient and recyclable heterogeneous catalysts is an important topic. Herein, a rhodium(III) complex Cp*Rh@HATN-CTF was synthesized by the coordinative immobilization of [Cp*RhCl2]2 on a hexaazatrinaphthalene-based covalent triazine framework. In the presence of Cp*Rh@HATN-CTF (1 mo l% Rh), a series of primary amines could be obtained via the reductive amination of ketones in high yields. Moreover, catalytic activity of Cp*Rh@HATN-CTF is well maintained during six runs. The present catalytic system was also applied for the large scale preparation of a biologically active compound. It would facilitate the development of CTF-supported transition metal catalysts for sustainable chemistry.
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Affiliation(s)
- Xiaozhong Chen
- Key Laboratory for Soft Chemistry and Functional Materials, Ministry of Education, Nanjing University of Science & Technology, Nanjing 210094, P. R. China
| | - Deyun Liu
- Key Laboratory for Soft Chemistry and Functional Materials, Ministry of Education, Nanjing University of Science & Technology, Nanjing 210094, P. R. China
| | - Chenchen Yang
- Key Laboratory for Soft Chemistry and Functional Materials, Ministry of Education, Nanjing University of Science & Technology, Nanjing 210094, P. R. China
| | - Lili Shi
- Key Laboratory for Soft Chemistry and Functional Materials, Ministry of Education, Nanjing University of Science & Technology, Nanjing 210094, P. R. China
| | - Feng Li
- Key Laboratory for Soft Chemistry and Functional Materials, Ministry of Education, Nanjing University of Science & Technology, Nanjing 210094, P. R. China
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, P. R. China
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21
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Zhu F, Zhang J, Ma Y, Yang L, Gao Q, Gao S, Cui C. Semi-rational design of an imine reductase for asymmetric synthesis of alkylated S-4-azepanamines. Org Biomol Chem 2023; 21:4181-4184. [PMID: 37129863 DOI: 10.1039/d3ob00442b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Although imine reductase (IRED)-catalyzed reductive amination is promising for the synthesis of alkylated chiral amines, precisely regulating the stereoselectivity of IRED remains a great challenge. Herein, focusing on the residues directly in contact with the ketone moiety, we applied structure-guided semi-rational design to obtain the triple-mutant I149Y/L200H/W234K. This mutant showed high stereoselectivity, of up to >99% (S), toward reductive amination of N-Boc-4-oxo-azepane and different amines, and to the best of our knowledge is the first biocatalyst developed for asymmetric synthesis of chiral azepane-4-amines.
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Affiliation(s)
- Fangfang Zhu
- College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China.
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China.
| | - Jun Zhang
- School of Life Science, Hebei University, Baoding 071002, China.
| | - Yaqing Ma
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China.
| | - Lujia Yang
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China.
| | - Qiang Gao
- College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China.
| | - Shushan Gao
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China.
- National Technology Innovation Center of Synthetic Biology, Tianjin 300308, China
| | - Chengsen Cui
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China.
- National Technology Innovation Center of Synthetic Biology, Tianjin 300308, China
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22
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Fuentes-Ríos D, Muñoz C, Díaz A, Sarabia F, López-Romero JM. Diastereoselective C-alkylation of aldimines, derived from chiral α-carbon heteroatom-substituted aldehydes, with triethylborane. Application to the synthesis of benzylisoquinolines. RSC Adv 2023; 13:8976-8984. [PMID: 36936855 PMCID: PMC10022415 DOI: 10.1039/d3ra01397a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 03/13/2023] [Indexed: 03/19/2023] Open
Abstract
The one-pot reaction of a chiral aldehyde, p-methoxyaniline or p-fluoroaniline, and triethylborane produces the corresponding alkylated chiral amine with high yields and diastereoisomeric ratios. Stereocontrol is induced by the presence of a heteroatom in the α-position to the aldehyde. In the case of alkylation of imines derived from chiral aliphatic amines, good yields and moderate to high diastereoselectivity are obtained: yields are significantly better when the preformed imine is used in the reaction with triethyl borane, and diastereoselectivity of the reactions largely depends on the structure of the chiral aliphatic amine. The methodology is successfully applied to the synthesis of romneine, a natural benzylisoquinoline.
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Affiliation(s)
- David Fuentes-Ríos
- Department of Organic Chemistry, Faculty of Sciences, University of Malaga Campus de Teatinos s/n 29071-Málaga Spain
| | - Carmen Muñoz
- Department of Organic Chemistry, Faculty of Sciences, University of Malaga Campus de Teatinos s/n 29071-Málaga Spain
| | - Amelia Díaz
- Department of Organic Chemistry, Faculty of Sciences, University of Malaga Campus de Teatinos s/n 29071-Málaga Spain
| | - Francisco Sarabia
- Department of Organic Chemistry, Faculty of Sciences, University of Malaga Campus de Teatinos s/n 29071-Málaga Spain
| | - J Manuel López-Romero
- Department of Organic Chemistry, Faculty of Sciences, University of Malaga Campus de Teatinos s/n 29071-Málaga Spain
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23
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Vijayapritha S, Nithya P, Viswanathamurthi P, Raju S, Linert W. Efficient ruthenium(II) complex catalyzed N-alkylation of amines and β-alkylation of secondary alcohol via borrowing hydrogen methodology. Polyhedron 2023. [DOI: 10.1016/j.poly.2023.116351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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24
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Fan F, Liu C, Cao J, Lyu C, Qiu S, Hu S, Sun T, Mei J, Wang H, Li Y, Zhao W, Mei L, Huang J. Turning thermostability of Aspergillus terreus (R)-selective transaminase At-ATA by synthetic shuffling. J Biotechnol 2023; 364:66-74. [PMID: 36708998 DOI: 10.1016/j.jbiotec.2023.01.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 01/23/2023] [Accepted: 01/24/2023] [Indexed: 01/27/2023]
Abstract
As versatile and green biocatalysts for the asymmetric amination of ketones, the insufficient thermostability of transaminases always limits its broad application in the pharmaceutical and fine chemical industries. Here, synthetic shuffling technology was used to enhance stability of (R)-selective transaminase from Aspergillus terreus. The results showed that 30 out of 5000 mutants had improved thermostability by color-based screening method, among which mutants with residual enzyme activity higher than 50% at 45 °C for 10 min were selected for further analysis. Especially, the half-inactivation temperature (T5010), half-life (t1/2), and melting temperature (Tm) of the best mutant M14 (M280C-H210N-M150C-F115L) were 13.7 °C, 165.8 min, and 13.9 °C higher than that of the wild type (WT), respectively. M14 also exhibited a significant biocatalytic efficiency toward acetophenone and 1-acetylnaphthalene, the yield of which were 265.6% and 117.5% higher than WT, respectively. Based on molecular dynamics simulation, improved catalytic efficiency of M14 could be attributed to its increased hydrogen bonds interaction around the mutation sites. Additionally, the introduction of disulfide bond combined with above mutations has a synergistic effect on the improved protein thermostability.
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Affiliation(s)
- Fangfang Fan
- Key Laboratory of Chemical and Biological Processing Technology for Farm Products of Zhejiang Province, Zhejiang Provincial Collaborative Innovation Center of Agricultural Biological Resources Biochemical Manufacturing, School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China; State Key Laboratory of Physical Chemistry of Solid Surfaces and Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Chunyan Liu
- Key Laboratory of Chemical and Biological Processing Technology for Farm Products of Zhejiang Province, Zhejiang Provincial Collaborative Innovation Center of Agricultural Biological Resources Biochemical Manufacturing, School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China
| | - Jiaren Cao
- Key Laboratory of Chemical and Biological Processing Technology for Farm Products of Zhejiang Province, Zhejiang Provincial Collaborative Innovation Center of Agricultural Biological Resources Biochemical Manufacturing, School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China
| | - Changjiang Lyu
- Key Laboratory of Chemical and Biological Processing Technology for Farm Products of Zhejiang Province, Zhejiang Provincial Collaborative Innovation Center of Agricultural Biological Resources Biochemical Manufacturing, School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China
| | - Shuai Qiu
- Key Laboratory of Chemical and Biological Processing Technology for Farm Products of Zhejiang Province, Zhejiang Provincial Collaborative Innovation Center of Agricultural Biological Resources Biochemical Manufacturing, School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China
| | - Sheng Hu
- School of Biological and Chemical Engineering, Ningbo Tech University, Ningbo 315100, China
| | - Tingting Sun
- Department of Physics, Zhejiang University of Science and Technology, Hangzhou 310023, China
| | - Jiaqi Mei
- Hangzhou Huadong Medicine Group Co. Ltd, Hangzhou 310011, China
| | - Hongpeng Wang
- Key Laboratory of Chemical and Biological Processing Technology for Farm Products of Zhejiang Province, Zhejiang Provincial Collaborative Innovation Center of Agricultural Biological Resources Biochemical Manufacturing, School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China
| | - Ye Li
- Key Laboratory of Chemical and Biological Processing Technology for Farm Products of Zhejiang Province, Zhejiang Provincial Collaborative Innovation Center of Agricultural Biological Resources Biochemical Manufacturing, School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China
| | - Weirui Zhao
- School of Biological and Chemical Engineering, Ningbo Tech University, Ningbo 315100, China
| | - Lehe Mei
- School of Biological and Chemical Engineering, Ningbo Tech University, Ningbo 315100, China; Jinhua Advanced Research Institute, Jinhua 321019, China; College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China.
| | - Jun Huang
- Key Laboratory of Chemical and Biological Processing Technology for Farm Products of Zhejiang Province, Zhejiang Provincial Collaborative Innovation Center of Agricultural Biological Resources Biochemical Manufacturing, School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China.
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25
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Catalytic Reductive Amination of Aromatic Aldehydes on Co-Containing Composites. CHEMISTRY 2023. [DOI: 10.3390/chemistry5010022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023] Open
Abstract
The performance of a series of cobalt-based composites in catalytic amination of aromatic aldehydes by amines in the presence of hydrogen as well as hydrogenation of quinoline was studied. The composites were prepared by pyrolysis of CoII acetate, organic precursor (imidazole, 1,10-phenantroline, 1,2-diaminobenzene or melamine) deposited on aerosil (SiO2). These composites contained nanoparticles of metallic Co together with N-doped carboneous particles. Quantitative yields of the target amine in a reaction of p-methoxybenzaldehyde with n-butylamine were obtained at p(H2) = 150 bar, T = 150 °C for all composites. It was found that amination of p-methoxybenzaldehyde with n-butylamine and benzylamine at p(H2) = 100 bar, T = 100 °C led to the formation of the corresponding amines with the yields of 72–96%. In the case of diisopropylamine, amination did not occur, and p-methoxybenzyl alcohol was the sole or the major reaction product. Reaction of p-chlorobenzaldehyde with n-butylamine on the Co-containing composites at p(H2) = 100 bar, T = 100 °C resulted in the formation of N-butyl-N-p-chlorobenzylamine in 60–89% yields. Among the considered materials, the composite prepared by decomposition of CoII complex with 1,2-diaminobenzene on aerosil showed the highest yields of the target products and the best selectivity in all studied reactions.
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26
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Sun R, Ma SS, Zhang ZH, Zhang YQ, Xu BH. Ruthenium-catalyzed reductive amination of ketones with nitroarenes and nitriles. Org Biomol Chem 2023; 21:1450-1456. [PMID: 36651476 DOI: 10.1039/d2ob02312a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The Ru(dppbsa)-catalyzed reductive amination of ketones with nitroarenes and nitriles using H2 as the environmentally benign hydrogen surrogate is developed in this study. Cross-experiments demonstrated that both reactions are initiated by the reduction of nitroarenes or nitriles to the corresponding amines, followed by condensation with ketones to give imines and thereafter hydrogenation. However, the route to the formation of an amino-ligated Ru complex during the reduction of nitroarenes or nitriles, followed by in situ nucleophilic C-N coupling, cannot be completely excluded. This newly developed versatile method features good functional group tolerance, which provides a novel design platform for homogeneous catalysts in constructing motifs of secondary amines.
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Affiliation(s)
- Rui Sun
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, State Key Laboratory of Biochemical Engineering, Institution of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.,College of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Shuang-Shuang Ma
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, State Key Laboratory of Biochemical Engineering, Institution of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.,College of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Zi-Heng Zhang
- College of Materials Science & Engineering, Huaqiao University, Xiamen 361021, China.,Beijing Key Laboratory for Chemical Power Source and Green Catalysis, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, China.
| | - Yan-Qiang Zhang
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, State Key Laboratory of Biochemical Engineering, Institution of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.,College of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Bao-Hua Xu
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, State Key Laboratory of Biochemical Engineering, Institution of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.,College of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China. .,Beijing Key Laboratory for Chemical Power Source and Green Catalysis, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, China.
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27
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Çakır S, Kavukcu SB, Şahin O, Günnaz S, Türkmen H. N-Alkylation and N-Methylation of Amines with Alcohols Catalyzed by Nitrile-Substituted NHC-Ir(III) and NHC-Ru(II) Complexes. ACS OMEGA 2023; 8:5332-5348. [PMID: 36816636 PMCID: PMC9933218 DOI: 10.1021/acsomega.2c06341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Accepted: 01/24/2023] [Indexed: 06/18/2023]
Abstract
A series of nitrile-modified N-heterocyclic carbene (NHC) complexes of Ir(III) (2a-e) and Ru(II) (3a-d) have been prepared by transmetallation of [IrCp*Cl2]2 and [RuCl2(p-cymene)]2 forming an in situ NHC-Ag complex. The structures of all complexes were characterized by 1H NMR, 13C NMR, and Fourier transform infrared (FT-IR) spectroscopies. And the structures were clearly elucidated by performing X-ray diffraction studies on 2b, 3a, and 3c single crystals. The complexes of NHC-Ir(III) (2a-e) and NHC-Ru(II) (3a-d) were investigated in the N-alkylation reaction of aniline derivatives with benzyl alcohols to form N-benzyl amines and in the N-methylation reaction of aniline derivatives with methanol. Both reactions were performed in solvent-free media. The Ir(III) complexes (2a-e) were found to perform essentially better than similar Ru(II) complexes (3a-d) in the N-alkylation and N-methylation reactions. Among the Ir(III) complexes (2a-e), the best results were obtained with 2b. The catalytic mechanisms of both reactions were revealed by 1H NMR study. Formation of Ir-hydride species was observed for both reactions. This new report provides useful information to evaluate the activity of complexes and the differences in sensitivity between the NHCs.
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Affiliation(s)
- Sinem Çakır
- Department
of Chemistry, Faculty of Science, Ege University, Bornova, 35100 Izmir, Türkiye
| | - Serdar Batıkan Kavukcu
- Department
of Chemistry, Faculty of Science, Ege University, Bornova, 35100 Izmir, Türkiye
| | - Onur Şahin
- Department
of Occupat Health & Safety, Faculty of Health Sciences, Sinop University, Sinop 57000, Türkiye
| | - Salih Günnaz
- Department
of Chemistry, Faculty of Science, Ege University, Bornova, 35100 Izmir, Türkiye
| | - Hayati Türkmen
- Department
of Chemistry, Faculty of Science, Ege University, Bornova, 35100 Izmir, Türkiye
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28
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Harris G, Trowbridge AD, Gaunt MJ. A Chiral Amine Transfer Approach to the Photocatalytic Asymmetric Synthesis of α-Trialkyl-α-tertiary Amines. Org Lett 2023; 25:861-866. [PMID: 36724345 PMCID: PMC9926512 DOI: 10.1021/acs.orglett.2c04308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
A long-standing challenge within radical chemistry is that of controlling the absolute stereochemistry of the products. Here, we report the stereocontrolled addition of α-amino radicals reductively generated from imines via visible-light-mediated photoredox-catalysis to alkenes, giving rise to enantioenriched α-trialkyl-α-tertiary amines. This process exploits a commercially available phenylglycinol derivative as a source of both nitrogen and chiral information. DFT studies support a stereochemical model whereby an intramolecular H-bond rigidifies the transition state of the enantiodetermining step.
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29
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Kohli S, Rathee G, Hooda S, Chandra R. An efficient approach for the green synthesis of biologically active 2,3-dihydroquinazolin-4(1 H)-ones using a magnetic EDTA coated copper based nanocomposite. RSC Adv 2023; 13:1923-1932. [PMID: 36712626 PMCID: PMC9832363 DOI: 10.1039/d2ra07496f] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Accepted: 12/28/2022] [Indexed: 01/12/2023] Open
Abstract
2,3-Dihydroquinazolinone derivatives are known for antiviral, antimicrobial, analgesic, anti-inflammatory, and anticancer activities. However, recent approaches used for their synthesis suffer from various drawbacks. Therefore, we have fabricated a highly efficient magnetic EDTA-coated catalyst, Fe3O4@EDTA/CuI via a simple approach. The ethylenediamine tetraacetic acid (EDTA) plays a crucial role by strongly trapping the catalytic sites of CuI nanoparticles on the surface of the Fe3O4 core. The designed nanocatalyst demonstrates its potential for the catalytic synthesis of 2,3-dihydroquinazolinones using 2-aminobenzamide with aldehydes as the reaction partners. The nanocatalyst was thoroughly characterized through X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), vibrating sample magnetometry (VSM), transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), X-ray photoelectron spectroscopy (XPS) and inductively coupled plasma analysis (ICP). The physiochemically characterized nanocatalyst was tested for synthesis of 2,3-dihydroquinazolinones and higher yields of derivatives were obtained with less time duration. Moreover, the catalytic synthesis is easy to operate without the use of any kind of additives/bases. Furthermore, the catalyst was magnetically recoverable after the completion of the reaction and displayed reusability for six successive rounds without any loss in its catalytic efficiency (confirmed by XRD, SEM, and TEM of the recycled material) along with very low leaching of copper (2.12 ppm) and iron (0.06 ppm) ions. Also, the green metrics were found in correlation with the ideal values (such as E factor (0.10), process mass intensity (1.10), carbon efficiency (96%) and reaction mass efficiency (90.62%)).
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Affiliation(s)
- Sahil Kohli
- Drug Discovery & Development Laboratory, Department of Chemistry, University of DelhiDelhi-110007India
| | - Garima Rathee
- Drug Discovery & Development Laboratory, Department of Chemistry, University of DelhiDelhi-110007India
| | - Sunita Hooda
- Department of Chemistry, Acharya Narendra Dev College, University of DelhiDelhi-110019India
| | - Ramesh Chandra
- Drug Discovery & Development Laboratory, Department of Chemistry, University of DelhiDelhi-110007India,Dr B.R. Ambedkar Center for Biomedical Research (ACBR), University of DelhiDelhi-110007India,Institute of Nanomedical Science (INMS), University of DelhiDelhi-110007India
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30
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Jyoti Roy V, Pathania V, Raha Roy S. Making and Breaking of C-N Bonds: Applications in the Synthesis of Unsymmetric Tertiary Amines and α-Amino Carbonyl Derivatives. Chem Asian J 2023; 18:e202200998. [PMID: 36373843 DOI: 10.1002/asia.202200998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 10/31/2022] [Indexed: 11/16/2022]
Abstract
An operationally simple process has been developed for the synthesis of unsymmetrical amines and α-amino carbonyl derivatives in the absence of a catalyst, ligand, oxidant, or any additives. Contrary to known reductive amination methods, this protocol is amenable to substrates containing other reducible groups. This process effectively results in consecutive cleavage and formation of C-N bonds. DFT studies and Hammett analysis provide useful insight into the mechanism. The role of noncovalent interactions as a stabilizing factor have been examined in the protocol. A wide range of alkyl-bromides have been coupled efficiently with a variety of dimethyl anilines to get unsymmetric tertiary amines with yields up to 90%. This methodology was further extended to the synthesis of α-amino carbonyl derivatives with yields up to 93%.
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Affiliation(s)
- Vishal Jyoti Roy
- Department of Chemistry, Indian Institute of Technology Delhi, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India
| | - Vishali Pathania
- Department of Chemistry, Indian Institute of Technology Delhi, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India
| | - Sudipta Raha Roy
- Department of Chemistry, Indian Institute of Technology Delhi, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India
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31
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Wei W, Zhan L, Gao L, Huang G, Ma X. Research Progress of Electrochemical Synthesis of C-Sulfonyl Compounds. CHINESE J ORG CHEM 2023. [DOI: 10.6023/cjoc202205018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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32
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Facilitated solvent screening for membrane-based extraction of chiral amines via a priori simulations. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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33
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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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34
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Kaya C, Birgül K, Bülbül B. Fundamentals of chirality, resolution, and enantiopure molecule synthesis methods. Chirality 2023; 35:4-28. [PMID: 36366874 DOI: 10.1002/chir.23512] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Revised: 09/23/2022] [Accepted: 10/11/2022] [Indexed: 11/13/2022]
Abstract
The chirality of molecules is a concept that explains the interactions in nature. We may observe the same formula but different organizations revolving around the chiral center. Since Pasteur's meticulous observation of sodium ammonium tartrate crystals' structure, scientists have discovered many features of chiral molecules. The number of newly approved single enantiomeric drugs increases every year and takes place in the market. Thus, separation or resolution methods of racemic mixtures are of continued importance in the efficacy of drugs, installation of affordable production processes, and convenient synthetic chemistry practice. This article presents the asymmetric synthesis approaches and the classification of direct resolution methods of chiral molecules.
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Affiliation(s)
- Cem Kaya
- Department of Pharmacy, Haydarpasa Numune Training and Research Hospital, İstanbul, Turkey.,Department of Pharmaceutical Chemistry, School of Pharmacy, Altınbaş University, İstanbul, Turkey
| | - Kaan Birgül
- Department of Pharmaceutical Chemistry, School of Pharmacy, Bahçeşehir University, İstanbul, Turkey
| | - Bahadır Bülbül
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Düzce University, Düzce, Turkey
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35
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Wu Z, He H, Chen M, Zhu L, Zheng W, Cao Y, Antilla JC. Asymmetric Reductive Amination with Pinacolborane Catalyzed by Chiral SPINOL Borophosphates. Org Lett 2022; 24:9436-9441. [PMID: 36519791 DOI: 10.1021/acs.orglett.2c03866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The catalytic asymmetric reductive amination of ketones with pinacolborane employing chiral SPINOL-derived borophosphates as catalysts has been realized. A series of chiral amine derivatives bearing multiple functional groups were obtained in good to excellent yields and enantioselectivities (up to 97% yield, 98% ee) under mild reaction conditions. Moreover, the synthetic applicability of the established method has been demonstrated by the asymmetric synthesis of (R)-Fendiline.
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Affiliation(s)
- Zhenwei Wu
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, P. R. China
| | - Hualing He
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, P. R. China
| | - Minglei Chen
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, P. R. China
| | - Linfei Zhu
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, P. R. China
| | - Weitao Zheng
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, P. R. China
| | - Yang Cao
- Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening, Jiangsu Ocean University, Lianyungang, Jiangsu222005, P. R. China
| | - Jon C Antilla
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, P. R. China
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36
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A growth selection system for the directed evolution of amine-forming or converting enzymes. Nat Commun 2022; 13:7458. [PMID: 36460668 PMCID: PMC9718777 DOI: 10.1038/s41467-022-35228-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 11/23/2022] [Indexed: 12/05/2022] Open
Abstract
Fast screening of enzyme variants is crucial for tailoring biocatalysts for the asymmetric synthesis of non-natural chiral chemicals, such as amines. However, most existing screening methods either are limited by the throughput or require specialized equipment. Herein, we report a simple, high-throughput, low-equipment dependent, and generally applicable growth selection system for engineering amine-forming or converting enzymes and apply it to improve biocatalysts belonging to three different enzyme classes. This results in (i) an amine transaminase variant with 110-fold increased specific activity for the asymmetric synthesis of the chiral amine intermediate of Linagliptin; (ii) a 270-fold improved monoamine oxidase to prepare the chiral amine intermediate of Cinacalcet by deracemization; and (iii) an ammonia lyase variant with a 26-fold increased activity in the asymmetric synthesis of a non-natural amino acid. Our growth selection system is adaptable to different enzyme classes, varying levels of enzyme activities, and thus a flexible tool for various stages of an engineering campaign.
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37
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Knaus T, Corrado ML, Mutti FG. One-Pot Biocatalytic Synthesis of Primary, Secondary, and Tertiary Amines with Two Stereocenters from α,β-Unsaturated Ketones Using Alkyl-Ammonium Formate. ACS Catal 2022; 12:14459-14475. [PMID: 36504913 PMCID: PMC9724091 DOI: 10.1021/acscatal.2c03052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Revised: 10/20/2022] [Indexed: 11/11/2022]
Abstract
The efficient asymmetric catalytic synthesis of amines containing more than one stereogenic center is a current challenge. Here, we present a biocatalytic cascade that combines ene-reductases (EReds) with imine reductases/reductive aminases (IReds/RedAms) to enable the conversion of α,β-unsaturated ketones into primary, secondary, and tertiary amines containing two stereogenic centers in very high chemical purity (up to >99%), a diastereomeric ratio, and an enantiomeric ratio (up to >99.8:<0.2). Compared with previously reported strategies, our strategy could synthesize two, three, or even all four of the possible stereoisomers of the amine products while precluding the formation of side-products. Furthermore, ammonium or alkylammonium formate buffer could be used as the only additional reagent since it acted both as an amine donor and as a source of reducing equivalents. This was achieved through the implementation of an NADP-dependent formate dehydrogenase (FDH) for the in situ recycling of the NADPH coenzyme, thus leading to increased atom economy for this biocatalytic transformation. Finally, this dual-enzyme ERed/IRed cascade also exhibits a complementarity with the recently reported EneIRED enzymes for the synthesis of cyclic six-membered ring amines. The ERed/IRed method yielded trans-1,2 and cis-1,3 substituted cyclohexylamines in high optical purities, whereas the EneIRED method was reported to yield one cis-1,2 and one trans-1,3 enantiomer. As a proof of concept, when 3-methylcyclohex-2-en-1-one was converted into secondary and tertiary chiral amines with different amine donors, we could obtain all the four possible stereoisomer products. This result exemplifies the versatility of this method and its potential for future wider utilization in asymmetric synthesis by expanding the toolbox of currently available dehydrogenases via enzyme engineering and discovery.
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Affiliation(s)
- Tanja Knaus
- Van’t Hoff Institute for Molecular
Sciences, HIMS-Biocat, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Maria L. Corrado
- Van’t Hoff Institute for Molecular
Sciences, HIMS-Biocat, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Francesco G. Mutti
- Van’t Hoff Institute for Molecular
Sciences, HIMS-Biocat, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
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38
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Gayathri S, Viswanathamurthi P, Bertani R, Sgarbossa P. Ruthenium Complexes Bearing α-Diimine Ligands and Their Catalytic Applications in N-Alkylation of Amines, α-Alkylation of Ketones, and β-Alkylation of Secondary Alcohols. ACS OMEGA 2022; 7:33107-33122. [PMID: 36157732 PMCID: PMC9494662 DOI: 10.1021/acsomega.2c03200] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 08/24/2022] [Indexed: 06/16/2023]
Abstract
New Ru(II) complexes encompassing α-diimine ligands were synthesized by reacting ruthenium precursors with α-diimine hydrazones. The new ligands and Ru(II) complexes were analyzed by analytical and various spectroscopic methods. The molecular structures of L1 and complexes 1, 3, and 4 were determined by single-crystal XRD studies. The results reveal a distorted octahedral geometry around the Ru(II) ion for all complexes. Moreover, the new ruthenium complexes show efficient catalytic activity toward the C-N and C-C coupling reaction involving alcohols. Particularly, complex 3 demonstrates effective conversion in N-alkylation of aromatic amines, α-alkylation of ketones, and β-alkylation of alcohols.
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Affiliation(s)
- Sekar Gayathri
- Department
of Chemistry, Periyar University, Salem 636 011, Tamil Nadu, India
| | | | - Roberta Bertani
- Department
of Industrial Engineering, University of
Padova, via F. Marzoloa, Padova 35131, Italy
| | - Paolo Sgarbossa
- Department
of Industrial Engineering, University of
Padova, via F. Marzoloa, Padova 35131, Italy
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39
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Kliemann MN, Teeuwen S, Weike C, Franciò G, Leitner W. Rhodium‐Catalyzed Asymmetric Hydrohydrazonemethylation of Styrenes: Access to Chiral Hydrazones, Hydrazides, Hydrazines and Amines. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | | | | | | | - Walter Leitner
- Max-Planck-Institute for Chemical Energy Conversion GERMANY
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40
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Yang PF, Liang JX, Zhao HT, Shu W. Access to Enantioenriched 1, n-Diamines via Ni-Catalyzed Hydroamination of Unactivated Alkenes with Weakly Coordinating Groups. ACS Catal 2022. [DOI: 10.1021/acscatal.2c02892] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Peng-Fei Yang
- Shenzhen Grubbs Institute, Department of Chemistry, and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, 518055 Guangdong, P. R. China
| | - Jian-Xing Liang
- Shenzhen Grubbs Institute, Department of Chemistry, and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, 518055 Guangdong, P. R. China
| | - Han-Tong Zhao
- Shenzhen Grubbs Institute, Department of Chemistry, and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, 518055 Guangdong, P. R. China
| | - Wei Shu
- Shenzhen Grubbs Institute, Department of Chemistry, and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, 518055 Guangdong, P. R. China
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. China
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41
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Li W, Shi R, Zhang X, Chen S, Wang Y, Wang M, Yang B, Li J, Xu XM. Different Lewis Acid Promotor-Steered Highly Regioselective Phosphorylation of Tertiary Enamides. J Org Chem 2022; 87:9769-9781. [PMID: 35866754 DOI: 10.1021/acs.joc.2c00829] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Different Lewis acid promotor-steered highly regioselective phosphorylation of tertiary enamides with diverse H-phosphonates or H-phosphine oxides was developed. Under the catalysis of iron salt, the phosphonyl group was introduced into the α-position of tertiary enamides, affording various α-phosphorylated amides in high efficiency. On the other hand, the β-phosphorylated tertiary enamides were efficiently obtained as the products in the presence of manganese(III) acetylacetonate.
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Affiliation(s)
- Wenzhong Li
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China
| | - Ran Shi
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China
| | - Xuesi Zhang
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China
| | - Sen Chen
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China
| | - Yu Wang
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China
| | - Mengqi Wang
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China
| | - Bin Yang
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China
| | - Jiazhu Li
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China
| | - Xin-Ming Xu
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China
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42
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Xu XM, Li W, Li Q, Chen S, Zhang X, Yang B, Wang WL. Manganese(III)-promoted highly stereoselective phosphorylation of acyclic tertiary enamides to synthesize E-selective β-phosphoryl enamides. Org Biomol Chem 2022; 20:5566-5574. [PMID: 35792054 DOI: 10.1039/d2ob00980c] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A concise manganese(III)-promoted stereoselective β-phosphorylation of acyclic tertiary enamides and diverse H-phosphine oxides was achieved. This reaction proceeds with absolute E-selectivity in contrast to Z-selectivity obtained in other previous works and affords various E-selective β-phosphorylated tertiary enamides in high efficiency. To the best of our knowledge, this is the first case of E-selective β-phosphorylation of tertiary enamides through C-H functionalization. In addition, the method features broad substrate scope, good functional group compatibility and efficient scale-up.
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Affiliation(s)
- Xin-Ming Xu
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China.
| | - Wenzhong Li
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China.
| | - Qiwei Li
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China.
| | - Sen Chen
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China.
| | - Xuesi Zhang
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China.
| | - Bin Yang
- College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China.
| | - Wei-Li Wang
- School of Chemistry and Material Science, Ludong University, Yantai 264005, China
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43
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Zhao W, Chen KZ, Li AZ, Li BJ. Remote Stereocenter through Amide-Directed, Rhodium-Catalyzed Enantioselective Hydroboration of Unactivated Internal Alkenes. J Am Chem Soc 2022; 144:13071-13078. [PMID: 35830595 DOI: 10.1021/jacs.2c05993] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Despite the frequent occurrence of γ-branched amines in bioactive molecules, the direct catalytic asymmetric synthesis of this structural motif containing a remote stereocenter remains an important synthetic challenge. Here, we report an amide-directed, rhodium-catalyzed highly diastereo- and enantioselective hydroboration of unactivated internal alkenes. This method provided facile access to enantioenriched amines containing β,γ-vicinal stereocenters. The application of this strategy to the synthesis of bioactive molecules was demonstrated. Computational studies indicated that migratory insertion of the alkene into rhodium hydride controls the enantioselectivity.
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Affiliation(s)
- Wei Zhao
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Ke-Zhi Chen
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - An-Zhen Li
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Bi-Jie Li
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China.,Beijing National Laboratory for Molecular Sciences, Beijing 100190, China.,Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300192, China
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44
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Kawada T, Yabushita K, Yasuda T, Ohta T, Yajima T, Tanaka K, Utsumi N, Watanabe M, Murata K, Kayaki Y, Kuwata S, Katayama T. Asymmetric Transfer Hydrogenative Amination of Benzylic Ketones Catalyzed by Cp*Ir(III) Complexes Bearing a Chiral N-(2-Picolyl)sulfonamidato Ligand. J Org Chem 2022; 87:8458-8468. [PMID: 35686909 DOI: 10.1021/acs.joc.2c00580] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A convenient asymmetric reductive amination of benzylic ketones (α-arylated ketones) catalyzed by newly designed Cp*Ir complexes bearing a chiral N-(2-picolyl)sulfonamidato ligand was developed. Using readily available β-amino alcohols as chiral aminating agents, a range of benzo-fused and acyclic ketones were successfully reduced with formic acid in methanol at 40 °C to afford amines with favorable chemo- and diastereoselectivities. The amino alcohol-derived chiral auxiliary was easily removed by mild periodic oxidants, leading to optically active primary β-arylamines without erosion of the optical purity (up to 97% ee). The excellent catalytic performance was retained even upon lowering the amount of catalyst to a substrate/catalyst (S/C) ratio of 20,000, and the amination could be performed on a large scale exceeding 100 g. The precise hydride transfer to iminium species generated from the ketonic substrate and the chiral amine counterpart was suggested by the mechanistic studies on stoichiometric reactions of isolable hydridoiridium complexes and model intermediates such as N,O-acetal, enamine, and iminium compounds.
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Affiliation(s)
- Takuma Kawada
- Central Research Laboratory, Technology & Department Division, Kanto Chemical Co., Inc., 7-1, Inari 1-chome, Soka, Saitama 340-0003, Japan
| | - Kenya Yabushita
- Central Research Laboratory, Technology & Department Division, Kanto Chemical Co., Inc., 7-1, Inari 1-chome, Soka, Saitama 340-0003, Japan
| | - Toshihisa Yasuda
- Central Research Laboratory, Technology & Department Division, Kanto Chemical Co., Inc., 7-1, Inari 1-chome, Soka, Saitama 340-0003, Japan
| | - Takeshi Ohta
- Central Research Laboratory, Technology & Department Division, Kanto Chemical Co., Inc., 7-1, Inari 1-chome, Soka, Saitama 340-0003, Japan
| | - Takaaki Yajima
- Central Research Laboratory, Technology & Department Division, Kanto Chemical Co., Inc., 7-1, Inari 1-chome, Soka, Saitama 340-0003, Japan
| | - Kouichi Tanaka
- Central Research Laboratory, Technology & Department Division, Kanto Chemical Co., Inc., 7-1, Inari 1-chome, Soka, Saitama 340-0003, Japan
| | - Noriyuki Utsumi
- Central Research Laboratory, Technology & Department Division, Kanto Chemical Co., Inc., 7-1, Inari 1-chome, Soka, Saitama 340-0003, Japan
| | - Masahito Watanabe
- Central Research Laboratory, Technology & Department Division, Kanto Chemical Co., Inc., 7-1, Inari 1-chome, Soka, Saitama 340-0003, Japan
| | - Kunihiko Murata
- Central Research Laboratory, Technology & Department Division, Kanto Chemical Co., Inc., 7-1, Inari 1-chome, Soka, Saitama 340-0003, Japan
| | - Yoshihito Kayaki
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1-E4-1 O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Shigeki Kuwata
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1-E4-1 O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Takeaki Katayama
- Central Research Laboratory, Technology & Department Division, Kanto Chemical Co., Inc., 7-1, Inari 1-chome, Soka, Saitama 340-0003, Japan
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45
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Wu Z, Krishnamurthy S, Satyanarayana Tummalapalli KS, Xu J, Yue C, Antilla JC. Enantioselective Amination of
β
‐Keto Esters Catalyzed by Chiral Calcium Phosphates. Chemistry 2022; 28:e202200907. [DOI: 10.1002/chem.202200907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Indexed: 11/10/2022]
Affiliation(s)
- Zhenwei Wu
- School of Pharmaceutical Science and Technology Institute for Molecular Design and Synthesis Tianjin University Tianjin 300072 China
| | - Suvratha Krishnamurthy
- School of Pharmaceutical Science and Technology Institute for Molecular Design and Synthesis Tianjin University Tianjin 300072 China
| | - K. S. Satyanarayana Tummalapalli
- School of Pharmaceutical Science and Technology Institute for Molecular Design and Synthesis Tianjin University Tianjin 300072 China
| | - Jun Xu
- School of Pharmaceutical Science and Technology Institute for Molecular Design and Synthesis Tianjin University Tianjin 300072 China
| | - Caizhen Yue
- School of Science Zhejiang Sci-Tech University Hangzhou City Zhejiang Province 310018 China
| | - Jon C. Antilla
- School of Pharmaceutical Science and Technology Institute for Molecular Design and Synthesis Tianjin University Tianjin 300072 China
- School of Science Zhejiang Sci-Tech University Hangzhou City Zhejiang Province 310018 China
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46
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Yang J, Buekenhoudt A, Dael MV, Luis P, Satyawali Y, Malina R, Lizin S. A Techno-economic Assessment of a Biocatalytic Chiral Amine Production Process Integrated with In Situ Membrane Extraction. Org Process Res Dev 2022. [DOI: 10.1021/acs.oprd.1c00464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jie Yang
- Centre for Environmental Sciences, Hasselt University, Martelarenlaan 42, 3500 Hasselt, Belgium
- Separation and Conversion Technology, VITO, Boeretang 200, 2400 Mol, Belgium
| | - Anita Buekenhoudt
- Separation and Conversion Technology, VITO, Boeretang 200, 2400 Mol, Belgium
| | - Miet Van Dael
- Centre for Environmental Sciences, Hasselt University, Martelarenlaan 42, 3500 Hasselt, Belgium
- Separation and Conversion Technology, VITO, Boeretang 200, 2400 Mol, Belgium
| | - Patricia Luis
- Materials & Process Engineering (iMMC-IMAP), UCLouvain, Place Sainte Barbe 2, 1348 Louvain-la-Neuve, Belgium
- Research & Innovation Centre for Process Engineering (ReCIPE), Place Sainte Barbe, 2 bte L5.02.02, 1348 Louvain-la-Neuve, Belgium
| | - Yamini Satyawali
- Separation and Conversion Technology, VITO, Boeretang 200, 2400 Mol, Belgium
| | - Robert Malina
- Centre for Environmental Sciences, Hasselt University, Martelarenlaan 42, 3500 Hasselt, Belgium
- Laboratory for Aviation and the Environment, Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Sebastien Lizin
- Centre for Environmental Sciences, Hasselt University, Martelarenlaan 42, 3500 Hasselt, Belgium
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47
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García-Vázquez V, Martínez-Pardo P, Postole A, Inge AK, Martín-Matute B. Synthesis of α,γ-Chiral Trifluoromethylated Amines through the Stereospecific Isomerization of α-Chiral Allylic Amines. Org Lett 2022; 24:3867-3871. [PMID: 35588010 PMCID: PMC9490871 DOI: 10.1021/acs.orglett.2c01436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Indexed: 11/29/2022]
Abstract
Chiral γ-branched aliphatic amines are present in a large number of pharmaceuticals and natural products. However, enantioselective methods to access these compounds are scarce and mainly rely on the use of designed chiral transition-metal complexes. Herein, we combined an organocatalytic method for the stereospecific isomerization of chiral allylic amines with a diastereoselective reduction of the chiral imine/enamine intermediates, leading to γ-trifluoromethylated aliphatic amines with two noncontiguous stereogenic centers, in excellent yields and high diastereo- and enantioselectivities. This approach has been used with primary amine substrates. This approach also provides a new synthetic pathway to chiral trifluoromethylated scaffolds, of importance in medicinal chemistry. Additionally, a gram-scale reaction demonstrates the applicability of this synthetic procedure.
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Affiliation(s)
- Víctor García-Vázquez
- Department
of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Pablo Martínez-Pardo
- Department
of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Alexandru Postole
- Department
of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - A. Ken Inge
- Department
of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Belén Martín-Matute
- Department
of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
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48
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Agrawal T, Perez-Morales KD, Cort JA, Sieber JD. Asymmetric Synthesis of Propargylic α-Stereogenic Tertiary Amines by Reductive Alkynylation of Tertiary Amides Using Ir/Cu Tandem Catalysis. J Org Chem 2022; 87:6387-6392. [PMID: 35435681 DOI: 10.1021/acs.joc.2c00131] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The development of an asymmetric protocol for the reductive alkynylation of amides to access important α-stereogenic tertiary propargylic amines is reported using a tandem Ir-catalyzed hydrosilylation/enantioselective Cu-catalyzed alkynylation. The reaction utilizes a Cu/PyBox catalyst system in the alkynylation step to achieve asymmetry and affords excellent yields with moderate to good levels of enantiocontrol while employing low Ir-catalyst loadings (0.5 mol %).
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Affiliation(s)
- Toolika Agrawal
- Department of Chemistry, Virginia Commonwealth University, 1001 West Main Street, Richmond, Virginia 23284, United States
| | - Kimberly D Perez-Morales
- Department of Chemistry, Virginia Commonwealth University, 1001 West Main Street, Richmond, Virginia 23284, United States
| | - Jermaine A Cort
- Department of Chemistry, Virginia Commonwealth University, 1001 West Main Street, Richmond, Virginia 23284, United States
| | - Joshua D Sieber
- Department of Chemistry, Virginia Commonwealth University, 1001 West Main Street, Richmond, Virginia 23284, United States
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49
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Uchikura T, Kamiyama N, Mouri T, Akiyama T. Visible-Light-Driven Enantioselective Radical Addition to Imines Enabled by the Excitation of a Chiral Phosphoric Acid–Imine Complex. ACS Catal 2022. [DOI: 10.1021/acscatal.2c00993] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Tatsuhiro Uchikura
- Department of Chemistry, Faculty of Science, Gakushuin University, 1-5-1, Mejiro, Toshima-ku, Tokyo 171-8588, Japan
| | - Nanami Kamiyama
- Department of Chemistry, Faculty of Science, Gakushuin University, 1-5-1, Mejiro, Toshima-ku, Tokyo 171-8588, Japan
| | - Toshiki Mouri
- Department of Chemistry, Faculty of Science, Gakushuin University, 1-5-1, Mejiro, Toshima-ku, Tokyo 171-8588, Japan
| | - Takahiko Akiyama
- Department of Chemistry, Faculty of Science, Gakushuin University, 1-5-1, Mejiro, Toshima-ku, Tokyo 171-8588, Japan
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50
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Baud D, Tappertzhofen N, Moody TS, Ward JM, Hailes HC. Stereoselective Transaminase‐Mediated Synthesis of Serotonin and Melatonin Receptor Agonists. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200146] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Damien Baud
- Department of Chemistry University College London 20 Gordon Street London WC1H 0AJ, U.K
| | - Nadine Tappertzhofen
- Department of Chemistry University College London 20 Gordon Street London WC1H 0AJ, U.K
| | - Thomas S. Moody
- Almac Department of Biocatalysis & Isotope Chemistry 20 Seagoe Industrial Estate Craigavon BT63 5QD N. Ireland, U.K
- Arran Chemical Company Limited Unit 1 Monksland Industrial Estate Athlone Co. Roscommon Ireland
| | - John M. Ward
- University College London Department of Biochemical Engineering Bernard Katz Building London WC1E 6BT, U.K
| | - Helen C. Hailes
- Department of Chemistry University College London 20 Gordon Street London WC1H 0AJ, U.K
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