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Cai J, Zeng G, Jiang K, Luo H, Yin B. Intramolecular Cobalt/Visible Light Cocatalyzed Reductive Coupling of Unactivated Arenes with Unactivated Alkenes. Org Lett 2024; 26:327-331. [PMID: 38160449 DOI: 10.1021/acs.orglett.3c03978] [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 protocol for the intramolecular reductive coupling of unactivated arenes with unactivated alkenes has been developed with the aid of a cooperative visible light/cobalt catalytic system. This coupling is achieved via radical cascade cyclization using amines as terminal reducing reagents and water as the main hydrogen source. In their form, readily available N-allyl benzamides are converted to the corresponding spiro cyclohexadiene-lactam or β-phenethylamine analogues in moderate to excellent yields.
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Affiliation(s)
- Jianpeng Cai
- School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan, Tianhe, Guangzhou 510640, China
- Guangzhou Addenda Chemical Corp. Ltd, 31 Kefeng, Huangpu, Guangzhou,510663, China
| | - Guohui Zeng
- School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan, Tianhe, Guangzhou 510640, China
- Guangzhou Addenda Chemical Corp. Ltd, 31 Kefeng, Huangpu, Guangzhou,510663, China
| | - Kai Jiang
- School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan, Tianhe, Guangzhou 510640, China
- Guangzhou Addenda Chemical Corp. Ltd, 31 Kefeng, Huangpu, Guangzhou,510663, China
| | - Hui Luo
- School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan, Tianhe, Guangzhou 510640, China
- Guangzhou Addenda Chemical Corp. Ltd, 31 Kefeng, Huangpu, Guangzhou,510663, China
| | - Biaolin Yin
- School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan, Tianhe, Guangzhou 510640, China
- Guangzhou Addenda Chemical Corp. Ltd, 31 Kefeng, Huangpu, Guangzhou,510663, China
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Soleymani Movahed F, Foo SW, Mori S, Ogawa S, Saito S. Phosphorus-Based Organocatalysis for the Dehydrative Cyclization of N-(2-Hydroxyethyl)amides into 2-Oxazolines. J Org Chem 2021; 87:243-257. [PMID: 34882422 DOI: 10.1021/acs.joc.1c02318] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A metal-free, biomimetic catalytic protocol for the cyclization of N-(2-hydroxyethyl)amides to the corresponding 2-oxazolines (4,5-dihydrooxazoles), promoted by the 1,3,5,2,4,6-triazatriphosphorine (TAP)-derived organocatalyst tris(o-phenylenedioxy)cyclotriphosphazene (TAP-1) has been developed. This approach requires less precatalyst compared to the reported relevant systems, with respect to the phosphorus atom (the maximum turnover number (TON) ∼ 30), and exhibits a broader substrate scope and higher functional-group tolerance, providing the functionalized 2-oxazolines with retention of the configuration at the C(4) stereogenic center of the 2-oxazolines. Widely accessible β-amino alcohols can be used in this approach, and the cyclization of N-(2-hydroxyethyl)amides provides the desired 2-oxazolines in up to 99% yield. The mechanism of the reaction was studied by monitoring the reaction using spectral and analytical methods, whereby an 18O-labeling experiment furnished valuable insights. The initial step involves a stoichiometric reaction between the substrate and TAP-1, which leads to the in situ generation of the catalyst, a catechol cyclic phosphate, as well as to a pyrocatechol phosphate and two possible active intermediates. The dehydrative cyclization was also successfully conducted on the gram scale.
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Affiliation(s)
| | - Siong Wan Foo
- Graduate School of Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan
| | - Shogo Mori
- Graduate School of Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan
| | - Saeko Ogawa
- Graduate School of Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan
| | - Susumu Saito
- Graduate School of Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan.,Research Center for Materials Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan
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Luo CH, Wang PL, Chang CC. Cascade Vinyl Radical Ipso-Cyclization Reactions and the Formation of α,β-Unsaturated-β-aryl-γ-lactams from N-Propargyl Benzamides. J Org Chem 2021; 86:15033-15044. [PMID: 34591475 DOI: 10.1021/acs.joc.1c01717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Various N-(2-bromo-allyl) benzamides were used as the starting materials to study vinyl radical cyclization reactions. The vinyl radicals underwent ipso-cyclization, fragmentation, and cyclization reactions to produce β-aryl-γ-lactams with the carbonyl group remaining intact. To further study this cascade radical reaction, vinyl radicals were generated by the addition of a tributyltin radical to alkyne moieties, followed by radical ipso-cyclization, fragmentation, cyclization, and β-scission reactions with the production of a series of α,β-unsaturated-β-aryl-γ-lactam derivatives. This new type of radical reaction was examined from the substituent effects on both the amino groups and the aryl groups. A bulky tert-butyl substituent on the amino group enhanced the formation of a Z-conformation of the benzamides and facilitated vinyl radical ipso-cyclization reactions. A synthetic method for preparing α,β-unsaturated-β-aryl-γ-lactams from N-propargyl benzamides was developed.
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Affiliation(s)
- Chih-Hao Luo
- Department of Chemistry, Fu Jen Catholic University, 510 Zhongzheng Road, Xinzhuang District, New Taipei City, 24205 Taiwan
| | - Pei-Ling Wang
- Department of Chemistry, Fu Jen Catholic University, 510 Zhongzheng Road, Xinzhuang District, New Taipei City, 24205 Taiwan
| | - Che-Chien Chang
- Department of Chemistry, Fu Jen Catholic University, 510 Zhongzheng Road, Xinzhuang District, New Taipei City, 24205 Taiwan
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Sahoo H, Ramakrishna I, Mandal A, Baidya M. Atom Transfer Oxidative Radical Cascade of Aryl Alkynoates towards 1,1-Dichalcogenide Olefins. Chem Asian J 2019; 14:4549-4552. [PMID: 31264795 DOI: 10.1002/asia.201900820] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 07/01/2019] [Indexed: 11/11/2022]
Abstract
An oxidative trifunctionalization of aryl alkynoates has been devised via the chalcogenide radical triggered intramolecular 1,4-aryl migration/decarboxylation cascade to prepare 1,1-dichalcogenide tetrasubstituted alkenes in high yields (up to 98 %). This operationally simple reaction proceeds under metal-free conditions, can be executed on gram scale, and highlights formal 1,1-difunctionalization of alkynes. Synthetic potential of this protocol was demonstrated through a twofold cascade rearrangement to access highly conjugated tetra-selenylated alkenes along with a cross-dehydrogenative annulation to prepare fluorene derivative.
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Affiliation(s)
- Harekrishna Sahoo
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600 036, Tamil Nadu, India
| | - Isai Ramakrishna
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600 036, Tamil Nadu, India
| | - Anup Mandal
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600 036, Tamil Nadu, India
| | - Mahiuddin Baidya
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600 036, Tamil Nadu, India
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Sahoo H, Singh S, Baidya M. Radical Cascade Reaction of Aryl Alkynoates at Room Temperature: Synthesis of Fully Substituted α,β-Unsaturated Acids with Chalcogen Functionality. Org Lett 2018; 20:3678-3681. [DOI: 10.1021/acs.orglett.8b01474] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Harekrishna Sahoo
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
| | - Saibal Singh
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
| | - Mahiuddin Baidya
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
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Hu QF, Gao TT, Shi YJ, Lei Q, Yu LT. Palladium-catalyzed intramolecular C–H arylation of 2-halo-N-Boc-N-arylbenzamides for the synthesis of N–H phenanthridinones. RSC Adv 2018; 8:13879-13890. [PMID: 35539333 PMCID: PMC9079793 DOI: 10.1039/c8ra02099j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 04/05/2018] [Indexed: 02/05/2023] Open
Abstract
A palladium catalyzed synthesis of N–H phenanthridinones was developed via C–H arylation. The protocol gives phenanthridinones regioselectively by one-pot reaction without deprotection. It exhibits broad substrate scope and affords targets in up to 95% yields. Importantly, it could be applied for the less reactive o-chlorobenzamides. Pd(t-Bu3P)2/KOAc proved to be a good combination for one-pot synthesis of N–H phenanthridinones with up to 95% yield.![]()
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Affiliation(s)
- Quan-Fang Hu
- State Key Laboratory of Biotherapy and Cancer Center
- West China Hospital
- West China Medical School
- Sichuan University and Collaborative Innovation Center
- Chengdu 610041
| | - Tian-Tao Gao
- State Key Laboratory of Biotherapy and Cancer Center
- West China Hospital
- West China Medical School
- Sichuan University and Collaborative Innovation Center
- Chengdu 610041
| | - Yao-Jie Shi
- State Key Laboratory of Biotherapy and Cancer Center
- West China Hospital
- West China Medical School
- Sichuan University and Collaborative Innovation Center
- Chengdu 610041
| | - Qian Lei
- State Key Laboratory of Biotherapy and Cancer Center
- West China Hospital
- West China Medical School
- Sichuan University and Collaborative Innovation Center
- Chengdu 610041
| | - Luo-Ting Yu
- State Key Laboratory of Biotherapy and Cancer Center
- West China Hospital
- West China Medical School
- Sichuan University and Collaborative Innovation Center
- Chengdu 610041
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Guo C, Chen D, Chen S, Liu X. Synthesis of Tetrasubstituted α,β‐Unsaturated Aldehydes
via
Radical 1,4‐Aryl Migration/Trifluoromethylthiolation Cascade Reaction of Aryl Propynyl Ethers. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700534] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Chun‐Huan Guo
- State Key Laboratory of Applied Organic Chemistry Lanzhou University Lanzhou 730000 People's Republic of China
| | - Dao‐Qian Chen
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 People's Republic of China
| | - Si Chen
- State Key Laboratory of Applied Organic Chemistry Lanzhou University Lanzhou 730000 People's Republic of China
| | - Xue‐Yuan Liu
- State Key Laboratory of Applied Organic Chemistry Lanzhou University Lanzhou 730000 People's Republic of China
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Ujjainwalla F, da Mata MLE, Pennell AM, Escolano C, Motherwell WB, Vázquez S. Synthesis of biaryls via intramolecular free radical ipso-substitution reactions. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.07.048] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Chen ZM, Zhang XM, Tu YQ. Radical aryl migration reactions and synthetic applications. Chem Soc Rev 2015; 44:5220-45. [DOI: 10.1039/c4cs00467a] [Citation(s) in RCA: 230] [Impact Index Per Article: 25.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This review provides a comprehensive summary of radical aryl migration reactions, highlighting their mechanistic studies and synthetic applications.
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Affiliation(s)
- Zhi-Min Chen
- School of Chemistry and Chemical Engineering
- Shanghai Jiao Tong University
- Shanghai 200240
- P. R. China
| | - Xiao-Ming Zhang
- State Key Laboratory of Applied Organic Chemistry
- Lanzhou University
- Collaborative Innovation Center of Chemical Science and Engineering
- Lanzhou
- Tianjin
| | - Yong-Qiang Tu
- School of Chemistry and Chemical Engineering
- Shanghai Jiao Tong University
- Shanghai 200240
- P. R. China
- State Key Laboratory of Applied Organic Chemistry
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Shang S, Zhang-Negrerie D, Du Y, Zhao K. Intramolecular Metal-Free Oxidative Aryl-Aryl Coupling: An Unusual Hypervalent-Iodine-Mediated Rearrangement of 2-SubstitutedN-Phenylbenzamides. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201402925] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Shang S, Zhang-Negrerie D, Du Y, Zhao K. Intramolecular Metal-Free Oxidative Aryl-Aryl Coupling: An Unusual Hypervalent-Iodine-Mediated Rearrangement of 2-SubstitutedN-Phenylbenzamides. Angew Chem Int Ed Engl 2014; 53:6216-9. [DOI: 10.1002/anie.201402925] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2014] [Revised: 03/31/2014] [Indexed: 01/26/2023]
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Unusual rearrangement and dearomatization reactions in Cu(I)-catalyzed atom transfer radical cyclizations from N-(1-phenylethyl)trichloroacetamides. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.04.042] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Vervisch K, D'hooghe M, Törnroos KW, De Kimpe N. Radical-mediated nitrile translocation as the key step in the stereoselective transformation of 2-(4-chloro-2-cyanobutyl)aziridines to methyl cis-(1-arylmethyl-4-phenylpiperidin-2-yl)acetates. Org Biomol Chem 2012; 10:3308-14. [DOI: 10.1039/c2ob07062f] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Lanza T, Minozzi M, Monesi A, Nanni D, Spagnolo P, Zanardi G. Improved Radical Approach to N-Unsubstituted Indol-2-one and Dihydro-2-quinolinone Compounds Bearing Spirocyclic Cyclohexanone/Cyclohexadienone Rings. Adv Synth Catal 2010. [DOI: 10.1002/adsc.201000067] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Harrowven DC, Curran DP, Kostiuk SL, Wallis-Guy IL, Whiting S, Stenning KJ, Tang B, Packard E, Nanson L. Potassium carbonate–silica: a highly effective stationary phase for the chromatographic removal of organotin impurities. Chem Commun (Camb) 2010; 46:6335-7. [DOI: 10.1039/c0cc01328e] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Rousseau G, Robert F, Landais Y. Functionalization and Rearrangement of Spirocyclohexadienyl Oxindoles: Experimental and Theoretical Investigations. Chemistry 2009; 15:11160-73. [DOI: 10.1002/chem.200901434] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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