1
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Iwasaki T, Nozaki K. Counterintuitive chemoselectivity in the reduction of carbonyl compounds. Nat Rev Chem 2024; 8:518-534. [PMID: 38831138 DOI: 10.1038/s41570-024-00608-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/18/2024] [Indexed: 06/05/2024]
Abstract
The reactivity of carbonyl functional groups largely depends on the substituents on the carbon atom. Reversal of the commonly accepted order of reactivity of different carbonyl compounds requires novel synthetic approaches. Achieving selective reduction will enable the transformation of carbon resources such as plastic waste, carbon dioxide and biomass into valuable chemicals. In this Review, we explore the reduction of less reactive carbonyl groups in the presence of those typically considered more reactive. We discuss reductions, including the controlled reduction of ureas, amides and esters to aldehydes, as well as chemoselective reductions of carbonyl groups, including the reduction of ureas over carbamates, amides and esters; the reduction of amides over esters, ketones and aldehydes; and the reduction of ketones over aldehydes.
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Affiliation(s)
- Takanori Iwasaki
- Department of Chemistry and Biotechnology, The University of Tokyo, Tokyo, Japan.
| | - Kyoko Nozaki
- Department of Chemistry and Biotechnology, The University of Tokyo, Tokyo, Japan
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2
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Fortney VA, Murphy JK, Stancil TR, Gembicky M, Rheingold AL, Weinert CS. Exploring the Versatility of the Amidation of Aryl Acid Fluorides using the Germylamines R 3 GeNMe 2. Chem Asian J 2023:e202300788. [PMID: 37883375 DOI: 10.1002/asia.202300788] [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: 09/12/2023] [Revised: 10/24/2023] [Accepted: 10/26/2023] [Indexed: 10/28/2023]
Abstract
The formation of amide bonds is an important process since this linkage is an essential component in proteins, pharmaceuticals, and other medicinally and biologically significant molecules. Recently, it was demonstrated that germylamines R3 GeNR'2 were useful reagents for the conversion of acid fluorides to amides. This transformation occurs readily at room temperature and has a low activation energy. In the present study, the versatility of this amidation reaction with aryl acid fluorides is investigated. A series of thirteen acid fluorides with various substituents on the aromatic ring were reacted with the germylamine Ph3 GeNMe2 and twelve of these were converted to the corresponding amides in high yields, the exception being 1,4-benzenedicarbonyl difluoride. The germylamines Bun 3 GeNMe2 and Pri 3 GeNMe2 also could be used for this interconversion, and both of these species successfully converted 1,4-benzenedicarbonyl difluoride to the corresponding amide. In addition, the crystal structure of Ph3 GeNMe2 is reported. This represents one of only three crystallographically characterized germylamines. The synthesis and 19 F NMR characterization of three fluorogermanes R3 GeF (R=Bun , Pri , and Mes) are also reported herein.
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Affiliation(s)
- Vanessa A Fortney
- Department of Chemistry, Oklahoma State University, Stillwater, Oklahoma, 74074, USA
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California, 92093-0358
| | - Julia K Murphy
- Department of Chemistry, Oklahoma State University, Stillwater, Oklahoma, 74074, USA
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California, 92093-0358
| | - Thad R Stancil
- Department of Chemistry, Oklahoma State University, Stillwater, Oklahoma, 74074, USA
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California, 92093-0358
| | - Milan Gembicky
- Department of Chemistry, Oklahoma State University, Stillwater, Oklahoma, 74074, USA
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California, 92093-0358
| | - Arnold L Rheingold
- Department of Chemistry, Oklahoma State University, Stillwater, Oklahoma, 74074, USA
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California, 92093-0358
| | - Charles S Weinert
- Department of Chemistry, Oklahoma State University, Stillwater, Oklahoma, 74074, USA
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California, 92093-0358
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3
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Sekiguchi Y, Pang JH, Ng JS, Chen J, Watanabe K, Takita R, Chiba S. Base-Induced Dehydrogenative and Dearomative Transformation of 1-Naphthylmethylamines to 1,4-Dihydronaphthalene-1-carbonitriles. JACS AU 2022; 2:2758-2764. [PMID: 36590271 PMCID: PMC9795570 DOI: 10.1021/jacsau.2c00487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 10/27/2022] [Accepted: 10/27/2022] [Indexed: 06/17/2023]
Abstract
Solvothermal treatment of 1-naphthylmethylamine with potassium hydride (KH) or n-butyllithium (n-BuLi)-potassium t-butoxide (t-BuOK) in THF induces unusual two consecutive β-hydride eliminations to form 1-naphthonitrile and KH. The freshly generated KH is hydridic enough to undergo dearomative hydride addition to the resultant 1-naphthonitrile regioselectively at the C4 position to afford α-cyano benzylic carbanion, which could be functionalized by a series of electrophiles, liberating the corresponding 1,4-dihydronaphthalene-1-carbonitriles having a quaternary carbon center.
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Affiliation(s)
- Yoshiya Sekiguchi
- School
of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore 637371, Singapore
| | - Jia Hao Pang
- School
of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore 637371, Singapore
| | - Jia Sheng Ng
- School
of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore 637371, Singapore
| | - Jiahua Chen
- School
of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore 637371, Singapore
| | - Kohei Watanabe
- Graduate
School of Pharmaceutical Sciences, The University
of Tokyo, 7-3-1 Hongo,
Bunkyo-ku, Tokyo 113-0033, Japan
| | - Ryo Takita
- Graduate
School of Pharmaceutical Sciences, The University
of Tokyo, 7-3-1 Hongo,
Bunkyo-ku, Tokyo 113-0033, Japan
- School
of Pharmaceutical Sciences, University of
Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Shunsuke Chiba
- School
of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore 637371, Singapore
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4
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Interception of enamine intermediates in reductive functionalization of lactams by sodium hydride: Synthesis of 2-cyano-3-iodo piperidines and pyrrolidines. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.132779] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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5
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Abstract
Recent advances in partial reductions of inert carboxylic acids and their derivatives to active aldehydes are reviewed.
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Affiliation(s)
- Zhanhui Yang
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P. R. China
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6
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An Easy Route to Aziridine Ketones and Carbinols. Int J Mol Sci 2021; 22:ijms222313145. [PMID: 34884949 PMCID: PMC8658269 DOI: 10.3390/ijms222313145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 11/28/2021] [Accepted: 12/02/2021] [Indexed: 11/20/2022] Open
Abstract
N,N-Dimethylaziridine-2-carboxamides react with organolithium reagents yielding 2-aziridinylketones. The reaction with one equivalent of organolithium compound is selective to amide carbonyl at a low (−78 °C) temperature. These ketones, in reaction with organolithium reagents, give symmetrical and unsymmetrical aziridinyl carbinols. The usage of excess phenyllithium may serve as a special N-Boc-protecting group cleavage method for acid-sensitive substrates.
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7
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Liang F, Eda K, Okazoe T, Wada A, Mori N, Konishi K, Tsuda A. Photo-on-Demand Synthesis of Vilsmeier Reagents with Chloroform and Their Applications to One-Pot Organic Syntheses. J Org Chem 2021; 86:6504-6517. [PMID: 33844541 DOI: 10.1021/acs.joc.1c00334] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The Vilsmeier reagent (VR), first reported a century ago, is a versatile reagent in a variety of organic reactions. It is used extensively in formylation reactions. However, the synthesis of VR generally requires highly toxic and corrosive reagents such as POCl3, SOCl2, or COCl2. In this study, we found that VR is readily obtained from a CHCl3 solution containing N,N-dimethylformamide or N,N-dimethylacetamide upon photo-irradiation under O2 bubbling. The corresponding Vilsmeier reagents were obtained in high yields with the generation of gaseous HCl and CO2 as byproducts to allow their isolations as crystalline solid products amenable to analysis by X-ray crystallography. With the advantage of using CHCl3, which bifunctionally serves as a reactant and a solvent, this photo-on-demand VR synthesis is available for one-pot syntheses of aldehydes, acid chlorides, formates, ketones, esters, and amides.
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Affiliation(s)
- Fengying Liang
- Department of Chemistry, Graduate School of Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan
| | - Kazuo Eda
- Department of Chemistry, Graduate School of Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan
| | - Takashi Okazoe
- Materials Integration Laboratories, AGC Inc., Suehiro 1-1 Tsurumi-ku, Yokohama City, Kanagawa 230-0045, Japan
| | - Akihiro Wada
- AGC Inc., Shin-Marunouchi Bldg., 1-5-1 Marunouchi, Chiyoda-ku, Tokyo 100-8405, Japan
| | - Nobuaki Mori
- AGC Inc., Shin-Marunouchi Bldg., 1-5-1 Marunouchi, Chiyoda-ku, Tokyo 100-8405, Japan
| | - Katsuhiko Konishi
- AGC Inc., Shin-Marunouchi Bldg., 1-5-1 Marunouchi, Chiyoda-ku, Tokyo 100-8405, Japan
| | - Akihiko Tsuda
- Department of Chemistry, Graduate School of Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan
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8
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Jin X, Tsukimura R, Aihara T, Miura H, Shishido T, Nozaki K. Metal–support cooperation in Al(PO3)3-supported platinum nanoparticles for the selective hydrogenolysis of phenols to arenes. Nat Catal 2021. [DOI: 10.1038/s41929-021-00598-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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9
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Ong DY, Chen JH, Chiba S. Reductive Functionalization of Carboxamides: A Recent Update. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2020. [DOI: 10.1246/bcsj.20200182] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Derek Yiren Ong
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Jia-hua Chen
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Shunsuke Chiba
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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10
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Wang B, Li Y, Pang JH, Watanabe K, Takita R, Chiba S. Hydromagnesiation of 1,3‐Enynes by Magnesium Hydride for Synthesis of Tri‐ and Tetra‐substituted Allenes. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202012027] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Bin Wang
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Yihang Li
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Jia Hao Pang
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Kohei Watanabe
- Graduate School of Pharmaceutical Sciences The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Ryo Takita
- Graduate School of Pharmaceutical Sciences The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Shunsuke Chiba
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
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11
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Wang B, Li Y, Pang JH, Watanabe K, Takita R, Chiba S. Hydromagnesiation of 1,3‐Enynes by Magnesium Hydride for Synthesis of Tri‐ and Tetra‐substituted Allenes. Angew Chem Int Ed Engl 2020; 60:217-221. [DOI: 10.1002/anie.202012027] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Indexed: 01/04/2023]
Affiliation(s)
- Bin Wang
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Yihang Li
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Jia Hao Pang
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Kohei Watanabe
- Graduate School of Pharmaceutical Sciences The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Ryo Takita
- Graduate School of Pharmaceutical Sciences The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Shunsuke Chiba
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
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12
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Wen F, Li Z. Glycinamide hydrochloride as a transient directing group: Synthesis of 2-benzylbenzaldehydes by C(sp3)−H arylation. SYNTHETIC COMMUN 2020. [DOI: 10.1080/00397911.2020.1802759] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Fei Wen
- College of Chemistry and chemical Engineering, Northwest Normal University, Lanzhou, China
| | - Zheng Li
- College of Chemistry and chemical Engineering, Northwest Normal University, Lanzhou, China
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13
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García-Domínguez A, West TH, Primozic JJ, Grant KM, Johnston CP, Cumming GG, Leach AG, Lloyd-Jones GC. Difluorocarbene Generation from TMSCF3: Kinetics and Mechanism of NaI-Mediated and Si-Induced Anionic Chain Reactions. J Am Chem Soc 2020; 142:14649-14663. [DOI: 10.1021/jacs.0c06751] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Andrés García-Domínguez
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh EH9 3FJ, U.K
| | - Thomas H. West
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh EH9 3FJ, U.K
| | - Johann J. Primozic
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh EH9 3FJ, U.K
| | - Katie M. Grant
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh EH9 3FJ, U.K
| | - Craig P. Johnston
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh EH9 3FJ, U.K
| | - Grant G. Cumming
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh EH9 3FJ, U.K
| | - Andrew G. Leach
- School of Health Sciences, Stopford Building, The University of Manchester, Oxford Road, Manchester M13 9PT, U.K
| | - Guy C. Lloyd-Jones
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh EH9 3FJ, U.K
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14
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Nozawa-Kumada K, Iwakawa Y, Onuma S, Shigeno M, Kondo Y. NaH-mediated direct C-H arylation in the presence of 1,10-phenanthroline. Chem Commun (Camb) 2020; 56:7773-7776. [PMID: 32573564 DOI: 10.1039/d0cc00730g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Transition-metal-free coupling of haloarenes with unactivated arenes has been developed in the presence of NaH and 1,10-phenanthroline. Various haloarenes bearing methyl, methoxy, halogen (fluoride, chloride, and bromide), cyano, trifluoromethyl, ester, and amide groups can be cross-coupled with unactivated arenes, or heteroarenes in this reaction.
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Affiliation(s)
- Kanako Nozawa-Kumada
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan.
| | - Yuki Iwakawa
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan.
| | - So Onuma
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan.
| | - Masanori Shigeno
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan.
| | - Yoshinori Kondo
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan.
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15
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Ong DY, Fan D, Dixon DJ, Chiba S. Transition-Metal-Free Reductive Functionalization of Tertiary Carboxamides and Lactams for α-Branched Amine Synthesis. Angew Chem Int Ed Engl 2020; 59:11903-11907. [PMID: 32329555 DOI: 10.1002/anie.202004272] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Indexed: 12/29/2022]
Abstract
A new method for the synthesis of α-branched amines by reductive functionalization of tertiary carboxamides and lactams is described. The process relies on the efficient and controlled reduction of tertiary amides by a sodium hydride/sodium iodide composite, in situ treatment of the resulting anionic hemiaminal with trimethylsilyl chloride and subsequent coupling with nucleophilic reagents including Grignard reagents and tetrabutylammonium cyanide. The new method exhibits broad functional-group compatibility, operates under transition-metal-free reaction conditions, and is suitable for various synthetic applications on both sub-millimole and on multigram scales.
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Affiliation(s)
- Derek Yiren Ong
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Dongyang Fan
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Darren J Dixon
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford, OX1 3TA, UK
| | - Shunsuke Chiba
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
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16
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Ong DY, Fan D, Dixon DJ, Chiba S. Transition‐Metal‐Free Reductive Functionalization of Tertiary Carboxamides and Lactams for α‐Branched Amine Synthesis. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202004272] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Derek Yiren Ong
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Dongyang Fan
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Darren J. Dixon
- Department of Chemistry Chemistry Research Laboratory University of Oxford Mansfield Road Oxford OX1 3TA UK
| | - Shunsuke Chiba
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
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17
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Wang B, Ong DY, Li Y, Pang JH, Watanabe K, Takita R, Chiba S. Stereo-controlled anti-hydromagnesiation of aryl alkynes by magnesium hydrides. Chem Sci 2020; 11:5267-5272. [PMID: 34122983 PMCID: PMC8159320 DOI: 10.1039/d0sc01773f] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A concise protocol for anti-hydromagnesiation of aryl alkynes was established using 1 : 1 molar combination of sodium hydride (NaH) and magnesium iodide (MgI2) without the aid of any transition metal catalysts. The resulting alkenylmagnesium intermediates could be trapped with a series of electrophiles, thus providing facile accesses to stereochemically well-defined functionalized alkenes. Mechanistic studies by experimental and theoretical approaches imply that polar hydride addition from magnesium hydride (MgH2) is responsible for the process. Anti-hydromagnesiation of aryl alkynes was facilitated solely by magnesium hydride. The resulting alkenylmagnesium intermediates were functionalized with various electrophiles to afford stereochemically defined tri-substituted alkenes.![]()
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Affiliation(s)
- Bin Wang
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University 637371 Singapore
| | - Derek Yiren Ong
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University 637371 Singapore
| | - Yihang Li
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University 637371 Singapore
| | - Jia Hao Pang
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University 637371 Singapore
| | - Kohei Watanabe
- Graduate School of Pharmaceutical Sciences, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Ryo Takita
- Graduate School of Pharmaceutical Sciences, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Shunsuke Chiba
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University 637371 Singapore
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18
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Wen F, Li Z. Semicarbazide: A Transient Directing Group for C(
sp
3
)−H Arylation of 2‐Methylbenzaldehydes. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201901392] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Fei Wen
- Chemistry and Chemical EngineeringNorthwest Normal University, Lanzhou Gansu 730070 People's Republic of China
| | - Zheng Li
- Chemistry and Chemical EngineeringNorthwest Normal University, Lanzhou Gansu 730070 People's Republic of China
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19
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Affiliation(s)
| | | | - Shunsuke Chiba
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University
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20
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Ong DY, Watanabe K, Takita R, Chiba S. Mechanistic Insights on Reduction of Carboxamides by Diisobutylaluminum Hydride and Sodium Hydride−Iodide Composite. Helv Chim Acta 2019. [DOI: 10.1002/hlca.201900166] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Derek Yiren Ong
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical SciencesNanyang Technological University Singapore 637371
| | - Kohei Watanabe
- Graduate School of Pharmaceutical SciencesThe University of Tokyo, 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Ryo Takita
- Graduate School of Pharmaceutical SciencesThe University of Tokyo, 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Shunsuke Chiba
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical SciencesNanyang Technological University Singapore 637371
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21
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Ong DY, Yen Z, Yoshii A, Revillo Imbernon J, Takita R, Chiba S. Controlled Reduction of Carboxamides to Alcohols or Amines by Zinc Hydrides. Angew Chem Int Ed Engl 2019; 58:4992-4997. [DOI: 10.1002/anie.201900233] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 02/09/2019] [Indexed: 12/11/2022]
Affiliation(s)
- Derek Yiren Ong
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University Singapore 637371 Singapore
| | - Zhihao Yen
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University Singapore 637371 Singapore
| | - Asami Yoshii
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University Singapore 637371 Singapore
| | - Julia Revillo Imbernon
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University Singapore 637371 Singapore
| | - Ryo Takita
- Graduate School of Pharmaceutical SciencesThe University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Shunsuke Chiba
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University Singapore 637371 Singapore
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22
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Ong DY, Yen Z, Yoshii A, Revillo Imbernon J, Takita R, Chiba S. Controlled Reduction of Carboxamides to Alcohols or Amines by Zinc Hydrides. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201900233] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Derek Yiren Ong
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University Singapore 637371 Singapore
| | - Zhihao Yen
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University Singapore 637371 Singapore
| | - Asami Yoshii
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University Singapore 637371 Singapore
| | - Julia Revillo Imbernon
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University Singapore 637371 Singapore
| | - Ryo Takita
- Graduate School of Pharmaceutical SciencesThe University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Shunsuke Chiba
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University Singapore 637371 Singapore
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23
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Liu Y, Mao Y, Hu Y, Gui J, Wang L, Wang W, Zhang S. The Employment of Sodium Hydride as a Michael Donor in Palladium‐catalyzed Reductions of α, β‐Unsaturated Carbonyl Compounds. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201801676] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Ye Liu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical SciencesSoochow University 199 Ren'ai Road, Suzhou Jiangsu 215123 People's Republic of China
| | - Yujian Mao
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical SciencesSoochow University 199 Ren'ai Road, Suzhou Jiangsu 215123 People's Republic of China
| | - Yanwei Hu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical SciencesSoochow University 199 Ren'ai Road, Suzhou Jiangsu 215123 People's Republic of China
| | - Jingjing Gui
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical SciencesSoochow University 199 Ren'ai Road, Suzhou Jiangsu 215123 People's Republic of China
| | - Liang Wang
- College of Chemistry and Pharmaceutical SciencesQingdao Agricultural University, Qingdao Shandong 266109 People's Republic of China
| | - Wei Wang
- State Key Laboratory of Bioengineering Reactor, and Shanghai Key Laboratory of New Drug Design, School of PharmacyEast China University of Science & Technology Shanghai 200237 People's Republic of China
- Department of Pharmacology and Toxicology, and BIO5 InstituteUniversity of Arizona 1703 E. Mabel St., P. O. Box 210207 Tucson AZ 85721-0207 USA
| | - Shilei Zhang
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical SciencesSoochow University 199 Ren'ai Road, Suzhou Jiangsu 215123 People's Republic of China
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24
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Pang JH, Kaga A, Chiba S. Nucleophilic amination of methoxypyridines by a sodium hydride-iodide composite. Chem Commun (Camb) 2018; 54:10324-10327. [PMID: 30141796 DOI: 10.1039/c8cc05979a] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A new protocol for nucleophilic amination of methoxypyridines and their derivatives was developed using sodium hydride (NaH) in the presence of lithium iodide (LiI). The method offers a concise access to various aminopyridines which are potentially of medicinal interest.
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Affiliation(s)
- Jia Hao Pang
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore.
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