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Al‐Rifai NM, Mubarak MS. α‐Substituted Chalcones: A Key Review. ChemistrySelect 2021. [DOI: 10.1002/slct.202103325] [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)
- Nafisah M. Al‐Rifai
- Pharmaceutical and chemical engineering department School of Medical Sciences German-Jordanian University, P.O. Box 35247 Amman 111800 Jordan
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Chen W, Walker JCL, Oestreich M. Metal-Free Transfer Hydroiodination of C-C Multiple Bonds. J Am Chem Soc 2019; 141:1135-1140. [PMID: 30550280 DOI: 10.1021/jacs.8b12318] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The design and a gram-scale synthesis of a bench-stable cyclohexa-1,4-diene-based surrogate of gaseous hydrogen iodide are described. By initiation with a moderately strong Brønsted acid, hydrogen iodide is transferred from the surrogate onto C-C multiple bonds such as alkynes and allenes without the involvement of free hydrogen iodide. The surrogate fragments into toluene and ethylene, easy-to-remove volatile waste. This hydroiodination reaction avoids precarious handling of hydrogen iodide or hydroiodic acid. By this, a broad range of previously unknown or difficult-to-prepare vinyl iodides can be accessed in stereocontrolled fashion.
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Affiliation(s)
- Weiqiang Chen
- Institut für Chemie , Technische Universität Berlin , Strasse des 17. Juni 115 , 10623 Berlin , Germany
| | - Johannes C L Walker
- Institut für Chemie , Technische Universität Berlin , Strasse des 17. Juni 115 , 10623 Berlin , Germany
| | - Martin Oestreich
- Institut für Chemie , Technische Universität Berlin , Strasse des 17. Juni 115 , 10623 Berlin , Germany
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Li HS, Guo G, Zhang RZ, Li F. Rhodium-Catalyzed Synthesis of α,β-Unsaturated Ketones through Sequential C–C Coupling and Redox Isomerization. Org Lett 2018; 20:5040-5043. [DOI: 10.1021/acs.orglett.8b02190] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hong-Shuang Li
- Institute of Pharmacology, School of Pharmaceutical Sciences, Taishan Medical University, 619 Changcheng Road, Taian 271016, P. R. China
| | - Guili Guo
- School of Basic Medical Sciences, Taishan Medical University, 619 Changcheng Road, Taian 271016, P. R. China
| | - Rui-Ze Zhang
- Institute of Pharmacology, School of Pharmaceutical Sciences, Taishan Medical University, 619 Changcheng Road, Taian 271016, P. R. China
| | - Fei Li
- Institute of Pharmacology, School of Pharmaceutical Sciences, Taishan Medical University, 619 Changcheng Road, Taian 271016, P. R. China
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Zhu H, Meng X, Zhang Y, Chen G, Cao Z, Sun X, You J. Chemoselective α-Methylenation of Aromatic Ketones Using the NaAuCl 4/Selectfluor/DMSO System. J Org Chem 2017; 82:12059-12065. [PMID: 29076735 DOI: 10.1021/acs.joc.7b01790] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Gold-catalyzed chemoselective α-methylenation of aromatic ketones was developed through the use of Selectfluor as a methylenating agent. A variety of useful 1,2-disubstituted propenone derivatives can be prepared in good yields via the present protocol. This reaction features a simple operation, good functional group tolerance, and broad scope of substrates.
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Affiliation(s)
- Hongbo Zhu
- School of Chemistry and Chemical Engineering, Qufu Normal University , Qufu, Shandong 273165, China
| | - Xin Meng
- School of Chemistry and Chemical Engineering, Qufu Normal University , Qufu, Shandong 273165, China
| | - Yanhui Zhang
- School of Chemistry and Chemical Engineering, Qufu Normal University , Qufu, Shandong 273165, China
| | - Guang Chen
- School of Chemistry and Chemical Engineering, Qufu Normal University , Qufu, Shandong 273165, China.,Shandong Key Laboratory of Life-Organic Analysis, Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine , Qufu, Shandong 273165, China
| | - Ziping Cao
- School of Chemistry and Chemical Engineering, Qufu Normal University , Qufu, Shandong 273165, China.,Shandong Key Laboratory of Life-Organic Analysis, Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine , Qufu, Shandong 273165, China
| | - Xuejun Sun
- School of Chemistry and Chemical Engineering, Qufu Normal University , Qufu, Shandong 273165, China.,Shandong Key Laboratory of Life-Organic Analysis, Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine , Qufu, Shandong 273165, China
| | - Jinmao You
- School of Chemistry and Chemical Engineering, Qufu Normal University , Qufu, Shandong 273165, China.,Shandong Key Laboratory of Life-Organic Analysis, Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine , Qufu, Shandong 273165, China
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Ruthenium-catalysed decomposition of formic acid: Fuel cell and catalytic applications. MOLECULAR CATALYSIS 2017. [DOI: 10.1016/j.mcat.2017.06.021] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Chenniappan VK, Rahaim RJ. Titanium-Promoted Cross-Coupling for the Selective Synthesis of Polysubstituted, Conjugated Amides. Org Lett 2016; 18:5090-5093. [PMID: 27678270 DOI: 10.1021/acs.orglett.6b02537] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
α,β-Unsaturated amides are important building blocks and are key structural elements in a number of biologically active natural products. Despite their importance and prevalence, few methods exist to prepare conjugated amides directly and modularly. To address this gap, a titanium-promoted coupling of alkynes and isocyanates has been developed. The method is highly stereoselective, producing only the E isomer with good chemoselectivity and regioselectivity (>95/5), for unsymmetrical internal alkynes that contain a steric bias. The reactive titanacyclopentene intermediate formed from the coupling of the alkyne and isocyanate was additionally reacted with various electrophiles to access tetrasubstituted enamides.
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Affiliation(s)
- Vinoth Kumar Chenniappan
- Department of Chemistry, Oklahoma State University , 107 Physical Sciences 1, Stillwater, Oklahoma 74078, United States
| | - Ronald J Rahaim
- Department of Chemistry, Oklahoma State University , 107 Physical Sciences 1, Stillwater, Oklahoma 74078, United States
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Li X, Zou G. Palladium-catalyzed acylative cross-coupling of amides with diarylborinic acids and sodium tetraarylborates. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2015.07.009] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Modular synthesis of tetra-substituted furans from alkynes, Weinreb amides, and aldehydes. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.09.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Li X, Zou G. Acylative Suzuki coupling of amides: acyl-nitrogen activation via synergy of independently modifiable activating groups. Chem Commun (Camb) 2015; 51:5089-92. [DOI: 10.1039/c5cc00430f] [Citation(s) in RCA: 175] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Highly efficient Pd/PCy3-catalyzed acylative Suzuki coupling of carboxylic amides has been achieved to provide a variety of aryl ketones, including sterically hindered thus difficultly accessible ones.
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Affiliation(s)
- Xijing Li
- Department of Fine Chemicals
- East China University of Science & Technology
- Shanghai
- P. R. China
| | - Gang Zou
- Department of Fine Chemicals
- East China University of Science & Technology
- Shanghai
- P. R. China
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Li W, Wu XF. Ruthenium-Catalyzed Conjugate Hydrogenation of α,β-Enones by in situ Generated Dihydrogen from Paraformaldehyde and Water. European J Org Chem 2014. [DOI: 10.1002/ejoc.201403359] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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