1
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Kalshetti RG, Rajput R, Motiwala Z, Srinivasa Reddy D, Kulkarni KA, Ramana CV. Postmodification of voxelotor (GBT 440) via [Rh]-catalyzed cross dehydrogenative coupling with olefins. Bioorg Med Chem Lett 2022; 77:129022. [DOI: 10.1016/j.bmcl.2022.129022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 09/24/2022] [Accepted: 10/06/2022] [Indexed: 11/16/2022]
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2
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Rapid and Simple Microwave-Assisted Synthesis of Benzoxazoles Catalyzed by [CholineCl][Oxalic Acid]. Catalysts 2022. [DOI: 10.3390/catal12111394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Microwave irradiation has been used to enhance the reaction yields and selectivities for organic transformation. In this paper, microwave irradiation (MW) was investigated for the environmentally benign synthesis of benzoxazoles through the cyclization of 2-aminophenols and benzaldehydes using deep eutectic solvent (DES) as a catalyst. The [CholineCl][oxalic acid] was easily synthesized from choline chloride with oxalic acid and used without further purification. [CholineCl][oxalic acid] catalyzed the synthesis of benzoxazoles to produce the desired product in a good to excellent conversion and selectivity under MW irradiation. The presence of [CholineCl][oxalic acid] helps to promote the rapid heating transfer from microwave irradiation into the reaction mixture. The [CholineCl][oxalic acid] can be recovered and reused several times without a considerable degradation in catalytic activity.
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3
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Sahoo K, Panda N. Iron(III) Chloride Mediated para‐Selective C‐H Functionalization: Access to C5‐Chloro and C5,C7‐Dichloro/Dianisyl Substituted 2‐Arylbenzoxazoles. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202101359] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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4
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Li XH, Gong JF, Song MP. Microwave-Assisted Ruthenium- and Rhodium-Catalyzed Couplings of α-Amino Acid Ester-Derived Phosphinamides with Alkynes. Chem Asian J 2021; 17:e202101158. [PMID: 34846096 DOI: 10.1002/asia.202101158] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 11/25/2021] [Indexed: 12/14/2022]
Abstract
Two different types of new phosphinamide α-amino ester derivatives have been prepared in moderate to high yields via ruthenium(II) and rhodium(III)-catalyzed ortho-C-H functionalization under microwave irradiation. Specifically, the ortho-alkenylated phosphinamides were produced through coupling of phosphinamides containing an α-substituted or α,α-disubstituted α-amino ester with internal alkynes under ruthenium catalysis. In contrast, Ru and the more effective Rh-catalyzed coupling of the α-unsubstituted glycine ester phosphinamide with alkynes resulted in formation of oxidative annulation products, phosphaisoquinolin-1-ones. The developed methods feature the use of easily accessible starting materials, short reaction time, exclusive E-stereoselectivity (for ortho-alkenylation) and good functional group tolerance. The alkenylation reaction was readily scaled up to gram scale. Furthermore, the obtained alkenylated phosphinamide could be transformed into P-containing dipeptides through hydrolysis of the ester group in the catalysis product and subsequent condensation with an α-amino ester.
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Affiliation(s)
- Xue-Hong Li
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou, 450001, P. R. China
| | - Jun-Fang Gong
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou, 450001, P. R. China
| | - Mao-Ping Song
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou, 450001, P. R. China
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5
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Faarasse S, El Brahmi N, Guillaumet G, El Kazzouli S. Regioselective C-H Functionalization of the Six-Membered Ring of the 6,5-Fused Heterocyclic Systems: An Overview. Molecules 2021; 26:5763. [PMID: 34641306 PMCID: PMC8510187 DOI: 10.3390/molecules26195763] [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: 07/28/2021] [Revised: 09/20/2021] [Accepted: 09/21/2021] [Indexed: 11/16/2022] Open
Abstract
The regioselective C-H functionalization of the five-membered ring of the 6,5-fused heterocyclic systems is nowadays well documented due to its high reactivity compared to the six-membered ring. So, developing new procedures of C-H functionalization of the six-membered ring "by thinking out of the box" is extremely challenging, which explains the limited number of reports published to date. This review paper aims to highlight advances achieved in this emerging chemistry research and discusses recently reported methods.
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Affiliation(s)
- Soukaina Faarasse
- Euromed Research Center, Euromed Faculty of Pharmacy, Euromed University of Fes, Route de Meknes, Fez 30000, Morocco; (S.F.); (N.E.B.); (G.G.)
- Institute of Organic and Analytical Chemistry, University of Orleans, UMR CNRS 7311, BP 6759, CEDEX 2, 45067 Orleans, France
| | - Nabil El Brahmi
- Euromed Research Center, Euromed Faculty of Pharmacy, Euromed University of Fes, Route de Meknes, Fez 30000, Morocco; (S.F.); (N.E.B.); (G.G.)
| | - Gérald Guillaumet
- Euromed Research Center, Euromed Faculty of Pharmacy, Euromed University of Fes, Route de Meknes, Fez 30000, Morocco; (S.F.); (N.E.B.); (G.G.)
- Institute of Organic and Analytical Chemistry, University of Orleans, UMR CNRS 7311, BP 6759, CEDEX 2, 45067 Orleans, France
| | - Saïd El Kazzouli
- Euromed Research Center, Euromed Faculty of Pharmacy, Euromed University of Fes, Route de Meknes, Fez 30000, Morocco; (S.F.); (N.E.B.); (G.G.)
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6
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Sunny S, John SE, Shankaraiah N. Exploration of C‐H Activation Strategies in Construction of Functionalized 2‐Aryl Benzoazoles: A Decisive Review. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100297] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Steeva Sunny
- Department of Medicinal Chemistry National Institute of Pharmaceutical Education and Research (NIPER) Hyderabad 500037 India
| | - Stephy Elza John
- Department of Medicinal Chemistry National Institute of Pharmaceutical Education and Research (NIPER) Hyderabad 500037 India
| | - Nagula Shankaraiah
- Department of Medicinal Chemistry National Institute of Pharmaceutical Education and Research (NIPER) Hyderabad 500037 India
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7
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Pipaliya BV, Seth K, Chakraborti AK. Ruthenium (II) Catalyzed C(sp 2 )-H Bond Alkenylation of 2-Arylbenzo[d]oxazole and 2-Arylbenzo[d]thiazole with Unactivated Olefins. Chem Asian J 2021; 16:87-96. [PMID: 33230945 DOI: 10.1002/asia.202001304] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Indexed: 01/10/2023]
Abstract
Functionalization of the bio-relevant heterocycles 2-arylbenzo[d]oxazole and 2-arylbenzo[d]thiazole has been achieved through Ru(II)-catalyzed alkenylation with unactivated olefins leading to selective formation of the mono-alkenylated products. This approach has a broad substrate scope with respect to the coupling partners, affords high yields, and works for gram scale synthesis using a readily available Ru-based catalyst. Mechanistic studies reveal a C-H activation pathway for the dehydrogenative coupling leading to the alkenylation. However, the results of the ESI-MS-guided deuterium kinetic isotope effect studies indicate that the C-H activation stage may not be the rate-determining step of the reaction. The use of a radical scavenging agent such as TEMPO did not show any detrimental effect on the reaction outcome, eliminating the possibility of the involvement of a free-radical pathway.
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Affiliation(s)
- Bhavin V Pipaliya
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S. A. S., Nagar, Punjab, 160062, India
| | - Kapileswar Seth
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S. A. S., Nagar, Punjab, 160062, India
| | - Asit K Chakraborti
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S. A. S., Nagar, Punjab, 160062, India.,Department of Chemistry, S. S. Bhatnagar Building, Main Campus, Indian Institute of Technology (IIT), Ropar, Rupnagar, Punjab, 140001, India
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8
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Ortho-substitution groups promoted photo-induced E (trans) → Z (cis) isomerization. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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9
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Huang S, Hong X, Cui HZ, Zhan B, Li ZM, Hou XF. Bimetallic Bis-NHC-Ir(III) Complex Bearing 2-Arylbenzo[ d]oxazolyl Ligand: Synthesis, Catalysis, and Bimetallic Effects. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00464] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shuang Huang
- Department of Chemistry, Fudan University, Shanghai 200433, China
| | - Xi Hong
- Department of Chemistry, Fudan University, Shanghai 200433, China
| | - He-Zhen Cui
- Department of Chemistry, Fudan University, Shanghai 200433, China
| | - Bing Zhan
- Department of Chemistry, Fudan University, Shanghai 200433, China
| | - Zhi-Ming Li
- Department of Chemistry, Fudan University, Shanghai 200433, China
| | - Xiu-Feng Hou
- Department of Chemistry, Fudan University, Shanghai 200433, China
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi 832003, China
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10
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Huang S, Hong X, Sun Y, Cui H, Zhou Q, Lin Y, Hou X. Ru(II)‐
PBT
NN
X
N
complex bearing functional 2‐(pyridin‐2‐yl)benzo[
d
]thiazole ligand catalyzed
α
‐alkylation of nitriles with alcohols. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5451] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Shuang Huang
- Department of ChemistryFudan University Jiangwan campus 2005 Songhu Rd Shanghai 200438 China
| | - Xi Hong
- Department of ChemistryFudan University Jiangwan campus 2005 Songhu Rd Shanghai 200438 China
| | - Yong Sun
- Key laboratory of toxicologyNingde Normal University Ningde 352000 China
| | - He‐Zhen Cui
- Department of ChemistryFudan University Jiangwan campus 2005 Songhu Rd Shanghai 200438 China
| | - Quan Zhou
- Department of ChemistryFudan University Jiangwan campus 2005 Songhu Rd Shanghai 200438 China
| | - Yue‐Jian Lin
- Department of ChemistryFudan University Jiangwan campus 2005 Songhu Rd Shanghai 200438 China
| | - Xiu‐Feng Hou
- Department of ChemistryFudan University Jiangwan campus 2005 Songhu Rd Shanghai 200438 China
- Key laboratory of toxicologyNingde Normal University Ningde 352000 China
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan Shihezi 832003 China
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11
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Layek S, Agrahari B, Kumar A, Dege N, Pathak DD. Synthesis and X-ray crystal structures of three new nickel(II) complexes of benzoylhydrazones: Catalytic applications in the synthesis of 2-arylbenzoxazoles. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2019.119222] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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12
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Huang S, Hong X, Cui HZ, Zhou Q, Lin YJ, Hou XF. N-Methylation of ortho-substituted aromatic amines with methanol catalyzed by 2-arylbenzo[d]oxazole NHC–Ir(iii) complexes. Dalton Trans 2019; 48:5072-5082. [DOI: 10.1039/c9dt00218a] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
By the modification on benzo[d]oxazolyl-NHC-ligated cyclometalated Ir complexes, the N-methylation of ortho-substituted aromatic amines with methanol was remarkably improved.
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Affiliation(s)
- Shuang Huang
- Department of Chemistry
- Fudan University
- Shanghai 200438
- China
| | - Xi Hong
- Department of Chemistry
- Fudan University
- Shanghai 200438
- China
| | - He-Zhen Cui
- Department of Chemistry
- Fudan University
- Shanghai 200438
- China
| | - Quan Zhou
- Department of Chemistry
- Fudan University
- Shanghai 200438
- China
| | - Yue-Jian Lin
- Department of Chemistry
- Fudan University
- Shanghai 200438
- China
| | - Xiu-Feng Hou
- Department of Chemistry
- Fudan University
- Shanghai 200438
- China
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan
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13
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Hong X, Zhou Q, Huang S, Cui HZ, Li ZM, Hou XF. Transition metal catalysed C7 and ortho-selective halogenation of 2-arylbenzo[d]oxazoles. Org Chem Front 2019. [DOI: 10.1039/c9qo00429g] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
An approach to construct C–X bonds on the C7 or ortho-position of 2-arylbenzo[d]oxazoles by Rh and Ru catalysts has been reported.
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Affiliation(s)
- Xi Hong
- Department of Chemistry
- Fudan University
- Shanghai 200433
- P. R. China
| | - Quan Zhou
- Department of Chemistry
- Fudan University
- Shanghai 200433
- P. R. China
| | - Shuang Huang
- Department of Chemistry
- Fudan University
- Shanghai 200433
- P. R. China
| | - He-Zhen Cui
- Department of Chemistry
- Fudan University
- Shanghai 200433
- P. R. China
| | - Zhi-Ming Li
- Department of Chemistry
- Fudan University
- Shanghai 200433
- P. R. China
| | - Xiu-Feng Hou
- Department of Chemistry
- Fudan University
- Shanghai 200433
- P. R. China
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14
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Panda N, Sahoo K. Synthesis of 4‐Alkenyl Benzoxazoles via Pd‐catalyzed
ortho
C−H Functionalization of 2‐Amidophenols. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201801272] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Niranjan Panda
- Department of ChemistryNational Institute of Technology Rourkela Odisha- 769008 India
| | - Kanchanbala Sahoo
- Department of ChemistryNational Institute of Technology Rourkela Odisha- 769008 India
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15
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Yang Z, Jie L, Yao Z, Yang Z, Cui X. Rhodium(III)‐Catalyzed Synthesis of
N
‐(2‐Acetoxyalkyl)isoquinolones from Oxazolines and Alkynes through C−N Bond Formation and Ring‐Opening. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201801217] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Zi Yang
- Engineering Research Center of Molecular Medicine of Ministry of Education, Key Laboratory of Fujian Molecular Medicine, Key Laboratory of Xiamen Marine and Gene Drugs, School of Biomedical Sciences Huaqiao University Xiamen 361021 People's Republic of China
| | - Lianghua Jie
- Engineering Research Center of Molecular Medicine of Ministry of Education, Key Laboratory of Fujian Molecular Medicine, Key Laboratory of Xiamen Marine and Gene Drugs, School of Biomedical Sciences Huaqiao University Xiamen 361021 People's Republic of China
| | - Zhenyu Yao
- Engineering Research Center of Molecular Medicine of Ministry of Education, Key Laboratory of Fujian Molecular Medicine, Key Laboratory of Xiamen Marine and Gene Drugs, School of Biomedical Sciences Huaqiao University Xiamen 361021 People's Republic of China
| | - Zhimin Yang
- Instrumental Analysis Center of Huaqiao University Xiamen 361021 People's Republic of China
| | - Xiuling Cui
- Engineering Research Center of Molecular Medicine of Ministry of Education, Key Laboratory of Fujian Molecular Medicine, Key Laboratory of Xiamen Marine and Gene Drugs, School of Biomedical Sciences Huaqiao University Xiamen 361021 People's Republic of China
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16
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Sambiagio C, Schönbauer D, Blieck R, Dao-Huy T, Pototschnig G, Schaaf P, Wiesinger T, Zia MF, Wencel-Delord J, Besset T, Maes BUW, Schnürch M. A comprehensive overview of directing groups applied in metal-catalysed C-H functionalisation chemistry. Chem Soc Rev 2018; 47:6603-6743. [PMID: 30033454 PMCID: PMC6113863 DOI: 10.1039/c8cs00201k] [Citation(s) in RCA: 1097] [Impact Index Per Article: 182.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Indexed: 12/20/2022]
Abstract
The present review is devoted to summarizing the recent advances (2015-2017) in the field of metal-catalysed group-directed C-H functionalisation. In order to clearly showcase the molecular diversity that can now be accessed by means of directed C-H functionalisation, the whole is organized following the directing groups installed on a substrate. Its aim is to be a comprehensive reference work, where a specific directing group can be easily found, together with the transformations which have been carried out with it. Hence, the primary format of this review is schemes accompanied with a concise explanatory text, in which the directing groups are ordered in sections according to their chemical structure. The schemes feature typical substrates used, the products obtained as well as the required reaction conditions. Importantly, each example is commented on with respect to the most important positive features and drawbacks, on aspects such as selectivity, substrate scope, reaction conditions, directing group removal, and greenness. The targeted readership are both experts in the field of C-H functionalisation chemistry (to provide a comprehensive overview of the progress made in the last years) and, even more so, all organic chemists who want to introduce the C-H functionalisation way of thinking for a design of straightforward, efficient and step-economic synthetic routes towards molecules of interest to them. Accordingly, this review should be of particular interest also for scientists from industrial R&D sector. Hence, the overall goal of this review is to promote the application of C-H functionalisation reactions outside the research groups dedicated to method development and establishing it as a valuable reaction archetype in contemporary R&D, comparable to the role cross-coupling reactions play to date.
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Affiliation(s)
- Carlo Sambiagio
- Organic Synthesis (ORSY)
, Department of Chemistry
, University of Antwerp
,
Groenenborgerlaan 171
, 2020 Antwerp
, Belgium
| | - David Schönbauer
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
| | - Remi Blieck
- Normandie Univ
, INSA Rouen
, UNIROUEN
, CNRS
, COBRA (UMR 6014)
,
76000 Rouen
, France
| | - Toan Dao-Huy
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
| | - Gerit Pototschnig
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
| | - Patricia Schaaf
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
| | - Thomas Wiesinger
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
| | - Muhammad Farooq Zia
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
| | - Joanna Wencel-Delord
- Laboratoire de Chimie Moléculaire (UMR CNRS 7509)
, Université de Strasbourg
,
ECPM 25 Rue Becquerel
, 67087 Strasbourg
, France
| | - Tatiana Besset
- Normandie Univ
, INSA Rouen
, UNIROUEN
, CNRS
, COBRA (UMR 6014)
,
76000 Rouen
, France
| | - Bert U. W. Maes
- Organic Synthesis (ORSY)
, Department of Chemistry
, University of Antwerp
,
Groenenborgerlaan 171
, 2020 Antwerp
, Belgium
| | - Michael Schnürch
- Institute of Applied Synthetic Chemistry
, TU Wien
,
Getreidemarkt 9/163
, A-1060 Vienna
, Austria
.
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17
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Huang S, Wu SP, Zhou Q, Cui HZ, Hong X, Lin YJ, Hou XF. Iridium(III)- benzoxazolyl and benzothiazolyl phosphine ligands catalyzed versatile alkylation reactions with alcohols and the synthesis of quinolines and indole. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.04.036] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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18
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Zhou Q, Hong X, Cui HZ, Huang S, Yi Y, Hou XF. The Construction of C-N, C-O, and C(sp 2)-C(sp 3) Bonds from Fluorine-Substituted 2-Aryl Benzazoles for Direct Synthesis of N-, O-, C-Functionalized 2-Aryl Benzazole Derivatives. J Org Chem 2018; 83:6363-6372. [PMID: 29869886 DOI: 10.1021/acs.joc.8b00587] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Herein, a general and practical route to 2-(2-aminophenyl)- and 2-(2-alkoxyphenyl)-substituted benzazoles by nucleophilic aromatic substitution (SNAr) is described. Upon treatment with Cs2CO3, the formation of C-N, C-O bonds occur between fluorine-substituted 2-aryl benzazoles and a diverse range of nitrogen, oxygen nucleophiles to provide the targets in good to excellent yields. Commercially available nucleophiles and high atom economy are notable features of the protocol. Meanwhile, the construction of C(sp2)-C(sp3) bond was also furnished in the presence of palladium catalyst.
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Affiliation(s)
- Quan Zhou
- Department of Chemistry , Fudan University , 220 Handan Road , Shanghai 200433 , China
| | - Xi Hong
- Department of Chemistry , Fudan University , 220 Handan Road , Shanghai 200433 , China
| | - He-Zhen Cui
- Department of Chemistry , Fudan University , 220 Handan Road , Shanghai 200433 , China
| | - Shuang Huang
- Department of Chemistry , Fudan University , 220 Handan Road , Shanghai 200433 , China
| | - Ying Yi
- Department of Chemistry , Fudan University , 220 Handan Road , Shanghai 200433 , China
| | - Xiu-Feng Hou
- Department of Chemistry , Fudan University , 220 Handan Road , Shanghai 200433 , China
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19
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Nguyen QT, Thi Hang AH, Ho Nguyen TL, Nguyen Chau DK, Tran PH. Phosphonium acidic ionic liquid: an efficient and recyclable homogeneous catalyst for the synthesis of 2-arylbenzoxazoles, 2-arylbenzimidazoles, and 2-arylbenzothiazoles. RSC Adv 2018; 8:11834-11842. [PMID: 35542773 PMCID: PMC9079114 DOI: 10.1039/c8ra01709c] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Accepted: 03/20/2018] [Indexed: 11/21/2022] Open
Abstract
A highly efficient and green strategy for the synthesis of 2-arylbenzoxazoles, 2-arylbenzimidazoles, and 2-arylbenzothiazoles catalyzed by phosphonium acidic ionic liquid has been developed via the condensation of o-aminophenol, o-phenylenediamines, and o-aminothiophenol, respectively, with aldehydes. The reaction has a good yield, the broad substrate scope, and mild condition. Triphenyl(butyl-3-sulphonyl)phosphonium toluenesulfonate catalyst was easily obtained from cheap and available starting materials through a one-pot synthesis. Its structure was identified by 1H NMR, 13C NMR, 31P NMR, and FT-IR techniques. Other properties including thermal stability and acidity were determined by TGA and Hammett acidity function method. Interestingly, the catalyst can maintain its constantly outstanding performance till the fourth recovery. A green, straightforward, and efficient synthesis of 2-arylbenzoxazoles, 2-arylbenzimidazoles, and 2-arylbenzothiazoles catalyzed by phosphonium acidic ionic liquid has been developed.![]()
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Affiliation(s)
- Quang The Nguyen
- Department of Organic Chemistry
- Faculty of Chemistry
- University of Science
- Vietnam National University – Ho Chi Minh City
- Viet Nam
| | - Anh-Hung Thi Hang
- Department of Organic Chemistry
- Faculty of Chemistry
- University of Science
- Vietnam National University – Ho Chi Minh City
- Viet Nam
| | - Thuy-Linh Ho Nguyen
- Department of Organic Chemistry
- Faculty of Chemistry
- University of Science
- Vietnam National University – Ho Chi Minh City
- Viet Nam
| | - Duy-Khiem Nguyen Chau
- Department of Organic Chemistry
- Faculty of Chemistry
- University of Science
- Vietnam National University – Ho Chi Minh City
- Viet Nam
| | - Phuong Hoang Tran
- Department of Organic Chemistry
- Faculty of Chemistry
- University of Science
- Vietnam National University – Ho Chi Minh City
- Viet Nam
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20
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Su S, Li J, Sun M, Zhao H, Chen Y, Li J. A domino reaction of 2-isocyanophenyloxyacrylate and aryne to synthesize arenes with vicinal olefin and benzoxazole. Chem Commun (Camb) 2018; 54:9611-9614. [DOI: 10.1039/c8cc05735d] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
An unusual domino reaction of 2-isocyanophenyloxyacrylate and aryne has been disclosed. The present strategy experiences nucleophilic addition, Michael addition, carbon–oxygen cleavage, and cyclization, thus enabling the quick aryne vicinal difunctionalization by the installation of a benzoxazole and an olefin.
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Affiliation(s)
- Shikuan Su
- School of Materials Science and Engineering
- Shanghai University
- Shanghai 200444
- P. R. China
| | - Jianxiong Li
- Department of Chemistry
- Center for Supramolecular Chemistry and Catalysis
- Shanghai University
- Shanghai 200444
- P. R. China
| | - Mingming Sun
- Department of Chemistry
- Center for Supramolecular Chemistry and Catalysis
- Shanghai University
- Shanghai 200444
- P. R. China
| | - Hongbin Zhao
- Department of Chemistry
- Center for Supramolecular Chemistry and Catalysis
- Shanghai University
- Shanghai 200444
- P. R. China
| | - Yali Chen
- School of Materials Science and Engineering
- Shanghai University
- Shanghai 200444
- P. R. China
- Department of Chemistry
| | - Jian Li
- School of Materials Science and Engineering
- Shanghai University
- Shanghai 200444
- P. R. China
- Department of Chemistry
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21
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Zhang SS, Xia J, Wu JQ, Liu XG, Zhou CJ, Lin E, Li Q, Huang SL, Wang H. Three-Component Catalytic Carboxygenation of Activated Alkenes Enabled by Bimetallic Rh(III)/Cu(II) Catalysis. Org Lett 2017; 19:5868-5871. [DOI: 10.1021/acs.orglett.7b02846] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shang-Shi Zhang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Jie Xia
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Jia-Qiang Wu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Xu-Ge Liu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Chu-Jun Zhou
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - E. Lin
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Qingjiang Li
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Shi-Liang Huang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Honggen Wang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
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22
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Liu X, Wang Z, Chen Q, He M, Wang L. Rhodium‐catalyzed
ortho
‐C‐H olefination of aromatic aldehydes employing transient directing strategy. Appl Organomet Chem 2017. [DOI: 10.1002/aoc.4039] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xi Liu
- School of Petrochemical Engineering and Jiangsu Key Laboratory of Advanced Catalytic Materials & TechnologyChangzhou University Changzhou 213164 P. R. China
| | - Zhonghao Wang
- School of Petrochemical Engineering and Jiangsu Key Laboratory of Advanced Catalytic Materials & TechnologyChangzhou University Changzhou 213164 P. R. China
| | - Qun Chen
- School of Petrochemical Engineering and Jiangsu Key Laboratory of Advanced Catalytic Materials & TechnologyChangzhou University Changzhou 213164 P. R. China
| | - Ming‐yang He
- School of Petrochemical Engineering and Jiangsu Key Laboratory of Advanced Catalytic Materials & TechnologyChangzhou University Changzhou 213164 P. R. China
| | - Liang Wang
- School of Petrochemical Engineering and Jiangsu Key Laboratory of Advanced Catalytic Materials & TechnologyChangzhou University Changzhou 213164 P. R. China
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23
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Song S, Lu P, Liu H, Cai SH, Feng C, Loh TP. Switchable C–H Functionalization of N-Tosyl Acrylamides with Acryloylsilanes. Org Lett 2017; 19:2869-2872. [DOI: 10.1021/acs.orglett.7b01107] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Shengjin Song
- Department
of Chemistry, University of Science and Technology of China, Hefei 230026, P. R. China
| | - Ping Lu
- Department
of Chemistry, University of Science and Technology of China, Hefei 230026, P. R. China
| | - Huan Liu
- Department
of Chemistry, University of Science and Technology of China, Hefei 230026, P. R. China
| | - Sai-Hu Cai
- Department
of Chemistry, University of Science and Technology of China, Hefei 230026, P. R. China
- Institute
of Advanced Synthesis, College of Chemistry and Molecular Engineering,
Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, Jiangsu 211816, P. R. China
| | - Chao Feng
- Institute
of Advanced Synthesis, College of Chemistry and Molecular Engineering,
Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, Jiangsu 211816, P. R. China
| | - Teck-Peng Loh
- Department
of Chemistry, University of Science and Technology of China, Hefei 230026, P. R. China
- Division
of Chemistry and Biological Chemistry, School of Physical and Mathematical
Sciences, Nanyang Technological University, 637371 Singapore
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