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1
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Zhang S, Wang S, Leng Y, Wu Y. One-pot synthesis of 2-acylbenzothiazoles from 2-aminobenzenethiols and arylacetonitriles via cyclization and sequential oxidation. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153300] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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2
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Nguyen LA, Nguyen TTT, Ngo QA, Nguyen TB. Fe/S-Catalyzed synthesis of 2-benzoylbenzoxazoles and 2-quinolylbenzoxazoles via redox condensation of o-nitrophenols with acetophenones and methylquinolines. Org Biomol Chem 2021; 19:6015-6020. [PMID: 34156054 DOI: 10.1039/d1ob00976a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
An Fe/S catalyst generated in situ from FeCl2·4H2O and elemental sulfur S8 in the presence of a tertiary amine as a base was found to catalyze efficiently a 6e- redox condensation of o-nitrophenols with acetophenones and methylquinolines. The condensed products 2-benzoylbenzoxazoles and 2-quinolylbenzoxazoles were obtained in reasonable yields with water as the only byproduct at a temperature as low as 80 °C.
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Affiliation(s)
- Le Anh Nguyen
- Institute of Chemistry, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam. and Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
| | - Thi Thu Tram Nguyen
- Department of Chemistry, Faculty of Science, Can Tho University of Medicine and Pharmacy, Vietnam
| | - Quoc Anh Ngo
- Institute of Chemistry, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam. and Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
| | - Thanh Binh Nguyen
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1, av de la Terrasse, 91198 Gif-sur-Yvette, France.
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3
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Nguyen LA, Ngo QA, Retailleau P, Nguyen TB. Break‐and‐Build Strategy for the Synthesis of 2‐Benzoylbenzoxazoles from
o
‐Aminophenols and Acetophenones. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100150] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Le Anh Nguyen
- Institute of Chemistry Vietnam Academy of Science and Technology 18 Hoang Quoc Viet, Cau Giay Hanoi Vietnam
- Graduate University of Science and Technology Vietnam Academy of Science and Technology 18 Hoang Quoc Viet, Cau Giay Hanoi Vietnam
| | - Quoc Anh Ngo
- Institute of Chemistry Vietnam Academy of Science and Technology 18 Hoang Quoc Viet, Cau Giay Hanoi Vietnam
- Graduate University of Science and Technology Vietnam Academy of Science and Technology 18 Hoang Quoc Viet, Cau Giay Hanoi Vietnam
| | - Pascal Retailleau
- Institut de Chimie des Substances Naturelles CNRS UPR 2301 Université Paris-Sud Université Paris-Saclay 1 avenue de la Terrasse 91198 Gif-sur-Yvette France
| | - Thanh Binh Nguyen
- Institut de Chimie des Substances Naturelles CNRS UPR 2301 Université Paris-Sud Université Paris-Saclay 1 avenue de la Terrasse 91198 Gif-sur-Yvette France
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4
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Tu Z, Zhao B, Wan J, Wang C, Liu Y. Aerobic Construction of 2-Acyl Benzoxazole by Tandem C—H Oxygenation and Oxazole Ring Formation. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202109029] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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5
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Aljaar N, Gujjarappa R, Al‐Refai M, Shtaiwi M, Malakar CC. Overview on Recent Approaches towards Synthesis of 2‐Keto‐annulated Oxazole Derivatives. J Heterocycl Chem 2019. [DOI: 10.1002/jhet.3673] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Nayyef Aljaar
- Chemistry DepartmentThe Hashemite University P.O. Box 150459 Zarqa 13115 Jordan
| | - Raghuram Gujjarappa
- Department of ChemistryNational Institute of Technology Manipur Langol Imphal 795004 India
| | - Mahmoud Al‐Refai
- Department of Chemistry, Faculty of ScienceAl al‐Bayt University Al‐Mafraq 25113 Jordan
| | - Majed Shtaiwi
- Chemistry DepartmentThe Hashemite University P.O. Box 150459 Zarqa 13115 Jordan
| | - Chandi C. Malakar
- Department of ChemistryNational Institute of Technology Manipur Langol Imphal 795004 India
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6
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Jiang J, Zou H, Dong Q, Wang R, Lu L, Zhu Y, He W. Synthesis of 2-Keto(hetero)aryl Benzox(thio)azoles through Base Promoted Cyclization of 2-Amino(thio)phenols with α,α-Dihaloketones. J Org Chem 2015; 81:51-6. [DOI: 10.1021/acs.joc.5b02093] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jun Jiang
- State Key
Laboratory of Chemo/Biosensing
and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P.R. China
| | - Huaxu Zou
- State Key
Laboratory of Chemo/Biosensing
and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P.R. China
| | - Qizhi Dong
- State Key
Laboratory of Chemo/Biosensing
and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P.R. China
| | - Ruijia Wang
- State Key
Laboratory of Chemo/Biosensing
and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P.R. China
| | - Linghui Lu
- State Key
Laboratory of Chemo/Biosensing
and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P.R. China
| | - Yonggang Zhu
- State Key
Laboratory of Chemo/Biosensing
and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P.R. China
| | - Weimin He
- State Key
Laboratory of Chemo/Biosensing
and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P.R. China
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7
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Aljaar N, Malakar CC, Conrad J, Beifuss U. Base-Promoted Domino Reaction of 5-Substituted 2-Nitrosophenols with Bromomethyl Aryl Ketones: A Transition-Metal-Free Approach to 2-Aroylbenzoxazoles. J Org Chem 2015; 80:10829-37. [PMID: 26399156 DOI: 10.1021/acs.joc.5b02000] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The reaction of 5-substituted 2-nitrosophenols with bromomethyl aryl ketones and related compounds employing K2CO3 as a base in refluxing THF and DMF at 80 °C, respectively, delivers 2-aroylbenzoxazoles in a single step with yields up to 85%. The new method involves an intermolecular nucleophilic substitution followed by intramolecular 1,2-addition and elimination. It allows an efficient and practical access to 2-aroylbenzoxazoles under transition-metal-free conditions.
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Affiliation(s)
- Nayyef Aljaar
- Bioorganische Chemie, Institut für Chemie, Universität Hohenheim , Garbenstraße 30, D-70599 Stuttgart, Germany.,Faculty of Pharmacy and Medical Sciences, Al-Ahliyya Amman University , Amman 19328, Jordan
| | - Chandi C Malakar
- Bioorganische Chemie, Institut für Chemie, Universität Hohenheim , Garbenstraße 30, D-70599 Stuttgart, Germany
| | - Jürgen Conrad
- Bioorganische Chemie, Institut für Chemie, Universität Hohenheim , Garbenstraße 30, D-70599 Stuttgart, Germany
| | - Uwe Beifuss
- Bioorganische Chemie, Institut für Chemie, Universität Hohenheim , Garbenstraße 30, D-70599 Stuttgart, Germany
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8
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Nguyen TB, Pasturaud K, Ermolenko L, Al-Mourabit A. Concise Access to 2-Aroylbenzothiazoles by Redox Condensation Reaction between o-Halonitrobenzenes, Acetophenones, and Elemental Sulfur. Org Lett 2015; 17:2562-5. [DOI: 10.1021/acs.orglett.5b01182] [Citation(s) in RCA: 87] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Thanh Binh Nguyen
- Institut de Chimie des Substances
Naturelles, CNRS-ICSN UPR 2301, Université Paris-Sud, 1 avenue de
la Terrase, Gif-sur-Yvette 91198 Cedex, France
| | - Karine Pasturaud
- Institut de Chimie des Substances
Naturelles, CNRS-ICSN UPR 2301, Université Paris-Sud, 1 avenue de
la Terrase, Gif-sur-Yvette 91198 Cedex, France
| | - Ludmila Ermolenko
- Institut de Chimie des Substances
Naturelles, CNRS-ICSN UPR 2301, Université Paris-Sud, 1 avenue de
la Terrase, Gif-sur-Yvette 91198 Cedex, France
| | - Ali Al-Mourabit
- Institut de Chimie des Substances
Naturelles, CNRS-ICSN UPR 2301, Université Paris-Sud, 1 avenue de
la Terrase, Gif-sur-Yvette 91198 Cedex, France
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9
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Martins MAP, Frizzo CP, Tier AZ, Moreira DN, Zanatta N, Bonacorso HG. Update 1 of: Ionic Liquids in Heterocyclic Synthesis. Chem Rev 2014; 114:PR1-70. [DOI: 10.1021/cr500106x] [Citation(s) in RCA: 95] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Marcos A. P. Martins
- Núcleo de Química
de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria-RS, Brazil
| | - Clarissa P. Frizzo
- Núcleo de Química
de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria-RS, Brazil
| | - Aniele Z. Tier
- Núcleo de Química
de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria-RS, Brazil
| | - Dayse N. Moreira
- Núcleo de Química
de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria-RS, Brazil
| | - Nilo Zanatta
- Núcleo de Química
de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria-RS, Brazil
| | - Helio G. Bonacorso
- Núcleo de Química
de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria-RS, Brazil
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