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Kumar R, Grover N, Jain N. 1O 2 Mediated Conversion of β-Enaminonitriles to α-Keto Amides Photosensitized by Recyclable H 2TPP in Visible Light. J Org Chem 2024; 89:4722-4732. [PMID: 38502937 DOI: 10.1021/acs.joc.3c02965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
We report a one-step approach for the conversion of β-enaminonitriles to synthetically versatile α-keto amides in moderate to high yields under visible light irradiation photosensitized by porphyrins. The method is mild, cost-effective, and sustainable and requires air as the sole reagent/oxidant. The reaction is believed to proceed via an ene-type pathway initiated by 1O2, followed by dehydration, imine hydrolysis, and subsequent nucleophilic substitution of the cyanide group by amine. The method offers a broad substrate scope and has also been extended for synthesis of α-keto esters with aliphatic alcohols as nucleophiles. The porphyrin recovered after the reaction can be reused multiple times.
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Affiliation(s)
- Rohit Kumar
- Department of Chemistry, Indian Institute of Technology, New Delhi-110016, India
| | - Nitika Grover
- Department of Chemistry, Indian Institute of Technology, New Delhi-110016, India
| | - Nidhi Jain
- Department of Chemistry, Indian Institute of Technology, New Delhi-110016, India
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2
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Zhang Z, Wu Q, Xu S, Yue Z, Zhou H, Jin W. Ultra-stable fully-aromatic microporous polyamide membrane for molecular sieving of nitrogen over volatile organic compound. JOURNAL OF HAZARDOUS MATERIALS 2023; 459:132151. [PMID: 37506641 DOI: 10.1016/j.jhazmat.2023.132151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Revised: 07/14/2023] [Accepted: 07/24/2023] [Indexed: 07/30/2023]
Abstract
Microporous polymer membranes are promising candidates for industrial membrane-based gas separation because of their high separation performance. However, their relatively low stability due to the local rearrangement of polymer chains during usage remains a problem. Hence, we propose the construction of a fully aromatic polymer structure in a microporous polymer membrane to enhance membrane stability. Four triptycene-based microporous polyamides were synthesized via the polymerization of 2,6,14-triaminotriptycene with aromatic acyl chloride and/or aliphatic acyl chlorides. Their properties were characterized and compared by using nuclear magnetic resonance (NMR) and Brunauer-Emmett-Teller analyses. The synthesized polyamides were fabricated into composite membranes by employing a solution process; their stability was evaluated for the molecular sieving of nitrogen over volatile organic compounds such as cyclohexane. Low-field NMR and X-ray photoelectron spectroscopy were used to investigate the differences in the properties of membranes with different structures at different times. The results showed that the fully aromatic polyamide membrane made from 2,6,14-triaminotriptycene and aromatic acyl chloride displayed constant rejection (99 %) and nitrogen permeability (approximately 50 Barrer) for the molecular sieving of nitrogen over cyclohexane during 100-d experiments, indicating good stability. This approach paves the way for the industrialization of microporous polymer membranes from a theoretical perspective.
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Affiliation(s)
- Zhiqiang Zhang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, 5 Xinmofan Road, Nanjing 210009, PR China
| | - Qiao Wu
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, 5 Xinmofan Road, Nanjing 210009, PR China
| | - Shilin Xu
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, 5 Xinmofan Road, Nanjing 210009, PR China
| | - Zhongyuan Yue
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, 5 Xinmofan Road, Nanjing 210009, PR China
| | - Haoli Zhou
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, 5 Xinmofan Road, Nanjing 210009, PR China; Zhangjiagang Institute of Nanjing Tech University, Suzhou 215699, PR China.
| | - Wanqin Jin
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, 5 Xinmofan Road, Nanjing 210009, PR China
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3
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Tian C, Sun Q, Wang J, Chen Q, Wen Z, Borzov M, Nie W. E-Stereospecific 1,1-Carboboration of Terminal Arylalkynes with [IB(C 6F 5) 3] –. CHINESE J ORG CHEM 2023. [DOI: 10.6023/cjoc202205029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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Ishida K, Kusama H. Generation of (amino)(boryloxy)carbenes from carbamoylboranes and their coupling reaction with aldehydes. Chem Commun (Camb) 2022; 58:1625-1628. [PMID: 35022628 DOI: 10.1039/d1cc06377d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Carbamoylboranes were found to react with various aldehydes under heating conditions to give α-hydroxycarboxamides in good yields. A DFT study supports the mechanism, which involves thermally generated (amino)(boryloxy)carbene intermediates. To our knowledge, this is the first report on the generation of (amino)(boryloxy)carbene intermediates from carbamoylboranes and its application to carbon-carbon bond-forming reactions.
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Affiliation(s)
- Kento Ishida
- Department of Chemistry, Faculty of Science, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan.
| | - Hiroyuki Kusama
- Department of Chemistry, Faculty of Science, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan.
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Junfei L, Yuling H, Yanhong L, Jianxin C. Synthesis of β-Nitroamide Derivatives Based on Carbamoylsilane. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202206014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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6
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Priebbenow DL. Silicon‐Derived Singlet Nucleophilic Carbene Reagents in Organic Synthesis. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000279] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Daniel L. Priebbenow
- School of ChemistryThe University of Melbourne Parkville, Victoria Australia 3010
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7
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Wen X, Chen W, Chen J. Nickel‐catalyzed aminocarbonylation of aryl halides with carbamoylsilanes: efficient synthesis of secondary (primary) aromatic amides. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.5174] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Xueping Wen
- College of Chemistry and Materials ScienceShanxi Normal University Lin fen 041004 P. R. China
| | - Wenwen Chen
- College of Chemistry and Materials ScienceShanxi Normal University Lin fen 041004 P. R. China
| | - Jianxin Chen
- College of Chemistry and Materials ScienceShanxi Normal University Lin fen 041004 P. R. China
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8
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Li W, Han Y, Chen J. α-Alkoxycarbonyl-α-hydroxy secondary amides from a carbamoylsilane and α-ketoesters. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.08.035] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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9
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Addition of carbamoylsilane to isatins: Highly efficient synthesis of 3-hydroxy-3-aminocarbonyl-2-oxindoles derivatives. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.05.051] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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de la Torre A, Kaiser D, Maulide N. Flexible and Chemoselective Oxidation of Amides to α-Keto Amides and α-Hydroxy Amides. J Am Chem Soc 2017; 139:6578-6581. [PMID: 28485589 DOI: 10.1021/jacs.7b02983] [Citation(s) in RCA: 105] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A suite of flexible and chemoselective methods for the transition-metal-free oxidation of amides to α-keto amides and α-hydroxy amides is presented. These highly valuable motifs are accessed in good to excellent yields and stereoselectivities with high functional group tolerance. The utility of the method is showcased by the formal synthesis of a potent histone deacetylase inhibitor.
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Affiliation(s)
- Aurélien de la Torre
- Institute of Organic Chemistry, Faculty of Chemistry, University of Vienna , Währinger Straße 38, 1090 Vienna, Austria
| | - Daniel Kaiser
- Institute of Organic Chemistry, Faculty of Chemistry, University of Vienna , Währinger Straße 38, 1090 Vienna, Austria
| | - Nuno Maulide
- Institute of Organic Chemistry, Faculty of Chemistry, University of Vienna , Währinger Straße 38, 1090 Vienna, Austria
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Wen XP, Han YL, Chen JX. Nickel-catalyzed aminocarbonylation of aryl halides using carbamoylsilane as an amide source. RSC Adv 2017. [DOI: 10.1039/c7ra08009c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
The nickel-catalyzed aminocarbonylation reaction of aryl halides using carbamoylsilanes as an amide source in toluene is developed leading to the formation of some tertiary or secondary aryl amides in good yields.
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Affiliation(s)
- Xue-Ping Wen
- College of Chemistry and Materials Science
- Shanxi Normal University
- Linfen 041004
- China
| | - Yu-Ling Han
- College of Chemistry and Materials Science
- Shanxi Normal University
- Linfen 041004
- China
| | - Jian-Xin Chen
- College of Chemistry and Materials Science
- Shanxi Normal University
- Linfen 041004
- China
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