1
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Srinivas B, Shakeena K, Kota DL, Abhinav V, Eswar P, Geetha Sravani R, Sampath Pavan Kumar A, Indukuri K, Dhanaraju KA, Murali Krishna Kumar M, Alla SK. Iron(III)-Catalyzed Regioselective Synthesis of Electron-Rich Benzothiazoles from Aryl Isothiocyanates via C-H Functionalization. J Org Chem 2023; 88:4458-4471. [PMID: 36912001 DOI: 10.1021/acs.joc.2c03078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/14/2023]
Abstract
We report herein a direct synthetic route for the preparation of 2-arylbenzothiazoles using aryl isothiocyanates and electron-rich arenes. The synthetic route involves triflic acid promoted addition of the arenes to aryl isothiocyanates followed by FeCl3-catalyzed C-S bond formation via C-H functionalization. The approach provides the advantage of synthesis of benzothiazoles without the conventional use of aryl aldehyde/carboxylic acid precursors employing the less expensive iron(III) catalyst.
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Affiliation(s)
- Bokka Srinivas
- Department of Chemistry, GITAM School of Science, GITAM (Deemed to be University), Gandhi Nagar, Rushikonda, Visakhapatnam, Andhra Pradesh 530045, India
| | - Kotari Shakeena
- Department of Chemistry, GITAM School of Science, GITAM (Deemed to be University), Gandhi Nagar, Rushikonda, Visakhapatnam, Andhra Pradesh 530045, India
| | - Durgeswari Lakkavarapu Kota
- Department of Chemistry, GITAM School of Science, GITAM (Deemed to be University), Gandhi Nagar, Rushikonda, Visakhapatnam, Andhra Pradesh 530045, India
| | - Valeti Abhinav
- Department of Chemistry, GITAM School of Science, GITAM (Deemed to be University), Gandhi Nagar, Rushikonda, Visakhapatnam, Andhra Pradesh 530045, India
| | - Pyla Eswar
- Department of Chemistry, GITAM School of Science, GITAM (Deemed to be University), Gandhi Nagar, Rushikonda, Visakhapatnam, Andhra Pradesh 530045, India
| | - Rongali Geetha Sravani
- Department of Chemistry, GITAM School of Science, GITAM (Deemed to be University), Gandhi Nagar, Rushikonda, Visakhapatnam, Andhra Pradesh 530045, India
| | - Anandam Sampath Pavan Kumar
- Department of Chemistry, GITAM School of Science, GITAM (Deemed to be University), Gandhi Nagar, Rushikonda, Visakhapatnam, Andhra Pradesh 530045, India
| | - Kiran Indukuri
- Chemistry-Discovery Research Lab, Dextro Synthesis Private Limited, Hyderabad, Telangana 500090, India
| | | | | | - Santhosh Kumar Alla
- Department of Chemistry, GITAM School of Science, GITAM (Deemed to be University), Gandhi Nagar, Rushikonda, Visakhapatnam, Andhra Pradesh 530045, India
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2
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Wu S, Geng F, Dong J, Liu L, Zhou Y. Metal-Free Oxidative Annulation of Phenols and Amines: A General Synthesis of Benzoxazoles. J Org Chem 2022; 87:9112-9127. [PMID: 35786919 DOI: 10.1021/acs.joc.2c00790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The ubiquity of benzoxazoles in natural products, drugs, and functional materials has stimulated numerous efforts toward their synthesis; however, the developed methods rely on prefunctionalized substrates and lack generality. Under metal-free conditions, a highly general synthesis of benzoxazoles direct from abundant and easily available phenols and amines is developed via a modular phenol functionalization controlled by TEMPO. In the reaction, various phenols and primary amines with a broad range of functional groups are compatible, producing structurally and functionally diverse benzoxazoles (64 examples) without or with trace observation of the byproducts of phenol transformation with amines. The practical synthesis, especially for drug tafamidis, demonstrates decisive advantages in generality, selectivity, efficiency, and atom- and step-economies over traditional methods, even in the cases of low yields. Mechanistically, the radical adducts of TEMPO with ortho-cyclohexa-2,4-dien-1-one radicals rather than the well-recognized cyclohexa-3,5-diene-1,2-diones may serve as intermediates.
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Affiliation(s)
- Shaofeng Wu
- Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Furong Geng
- Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Jianyu Dong
- School of Physics and Chemistry, Hunan First Normal University, Changsha 410205, China
| | - Long Liu
- Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Yongbo Zhou
- Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
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3
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Li Y, Wu P, Yang Z. Synthesis of 2-Aryl Benzoxazoles from Benzoxazoles and α-Ketoic Acids by Photoredox Catalysis. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202110030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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4
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Nguyen HT, Nguyen TH, Pham DD, Nguyen CT, Tran PH. A green approach for the synthesis of 2-substituted benzoxazoles and benzothiazoles via coupling/cyclization reactions. Heliyon 2021; 7:e08309. [PMID: 34820534 PMCID: PMC8601991 DOI: 10.1016/j.heliyon.2021.e08309] [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: 08/17/2021] [Revised: 10/10/2021] [Accepted: 10/29/2021] [Indexed: 11/20/2022] Open
Abstract
We have developed the green method for the synthesis of benzoxazoles and benzothiazoles with moderate to good yields using imidazolium chlorozincate (II) ionic liquid supported into Fe3O4 nanoparticles (LAIL@MNP) under solvent-free sonication. The reaction was performed under mild conditions and only produced water as a sole byproduct. The reactions under solvent-free sonication showed advantages of faster reaction rate (30 min) and high yields of the products (up to 90%). Moreover, the LAIL@MNP material was easily separated from the reaction mixture and can be recycled for five consecutive runs with a slight decrease in its catalytic performance (from 82 to 73%).
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Affiliation(s)
- Hai Truong Nguyen
- Department of Organic Chemistry, Faculty of Chemistry, University of Science, Ho Chi Minh City, Viet Nam
- Vietnam National University, Ho Chi Minh City, Viet Nam
| | - Trinh Hao Nguyen
- Department of Organic Chemistry, Faculty of Chemistry, University of Science, Ho Chi Minh City, Viet Nam
- Vietnam National University, Ho Chi Minh City, Viet Nam
| | - Dung Duc Pham
- Faculty of Chemistry, Ho Chi Minh City University of Education, Viet Nam
| | - Cong Tien Nguyen
- Faculty of Chemistry, Ho Chi Minh City University of Education, Viet Nam
| | - Phuong Hoang Tran
- Department of Organic Chemistry, Faculty of Chemistry, University of Science, Ho Chi Minh City, Viet Nam
- Vietnam National University, Ho Chi Minh City, Viet Nam
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5
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Ghoshal T, Patel TM, Kotturi S. Acetic Acid Mediated Electrochemical Synthesis of Benzazole and its Application in the Synthesis of Pharmaceutically Active Compounds. ChemistrySelect 2021. [DOI: 10.1002/slct.202102587] [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)
- Tanay Ghoshal
- Shri MM Patel Institute of Sciences and research Department of chemistry, Kadi Sarva Vishwavidyalaya, Gandhinagar- 382024 Gujarat India
- Piramal Discovery Solutions Pharmaceutical Special Economic Zone, Sarkhej Bavla Highway, Ahmedabad Gujarat 382213 India
| | - Tarun M. Patel
- Shri MM Patel Institute of Sciences and research Department of chemistry, Kadi Sarva Vishwavidyalaya, Gandhinagar- 382024 Gujarat India
| | - Sharadsrikar Kotturi
- Piramal Discovery Solutions Pharmaceutical Special Economic Zone, Sarkhej Bavla Highway, Ahmedabad Gujarat 382213 India
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6
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Rao MS, Hussain S. TEMPO-mediated aerobic oxidative synthesis of 2-aryl benzoxazoles via ring-opening of benzoxazoles with benzylamines. SYNTHETIC COMMUN 2021. [DOI: 10.1080/00397911.2021.1949476] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
| | - Sahid Hussain
- Department of Chemistry, Indian Institute of Technology Patna, Patna, India
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7
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Wu S, Zhou D, Geng F, Dong J, Su L, Zhou Y, Yin S. Metal‐Free Oxidative Condensation of Catechols, Aldehydes and NH
4
OAc towards Benzoxazoles. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100249] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Shaofeng Wu
- Advanced Catalytic Engineering Research Center of the Ministry of Education College of Chemistry and Chemical Engineering Hunan University Changsha 410082 People's Republic of China
| | - Dan Zhou
- Advanced Catalytic Engineering Research Center of the Ministry of Education College of Chemistry and Chemical Engineering Hunan University Changsha 410082 People's Republic of China
| | - Furong Geng
- Advanced Catalytic Engineering Research Center of the Ministry of Education College of Chemistry and Chemical Engineering Hunan University Changsha 410082 People's Republic of China
| | - Jianyu Dong
- Department of Educational Science Hunan First Normal University Changsha 410205 People's Republic of China
| | - Lebin Su
- Advanced Catalytic Engineering Research Center of the Ministry of Education College of Chemistry and Chemical Engineering Hunan University Changsha 410082 People's Republic of China
| | - Yongbo Zhou
- Advanced Catalytic Engineering Research Center of the Ministry of Education College of Chemistry and Chemical Engineering Hunan University Changsha 410082 People's Republic of China
| | - Shuang‐Feng Yin
- Advanced Catalytic Engineering Research Center of the Ministry of Education College of Chemistry and Chemical Engineering Hunan University Changsha 410082 People's Republic of China
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8
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Exploration of Cu-catalyzed regioselective hydrodehalogenation of o-haloanilides using EtOH as hydrogen source. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.121844] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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9
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Saranya TV, Sruthi PR, Raj V, Anas S. Novel and efficient heterogeneous polymer supported copper catalyst for synthesis of 2-substituted Benzoxazoles from 2-Haloanilides. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.121733] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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10
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Dhawale KD, Ingale AP, Shinde SV, Thorat NM, Patil LR. ZnO-NPs catalyzed condensation of 2-aminothiophenol and aryl/alkyl nitriles: Efficient green synthesis of 2-substituted benzothiazoles. SYNTHETIC COMMUN 2021. [DOI: 10.1080/00397911.2021.1894577] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Kiran D. Dhawale
- Department of Chemistry, Rao Bahadur Narayan Borawake College, Ahmednagar, India
| | - Ajit P. Ingale
- Department of Chemistry, Dada Patil College, Ahmednagar, India
| | | | - Nitin M. Thorat
- Department of Chemistry, Maharaja Jivajirao Shinde College, Ahmednagar, India
| | - Limbraj R. Patil
- Department of Chemistry, Maharaja Jivajirao Shinde College, Ahmednagar, India
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11
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Tang Y, Li M, Gao H, Rao G, Mao Z. Efficient Cu-catalyzed intramolecular O-arylation for synthesis of benzoxazoles in water. RSC Adv 2020; 10:14317-14321. [PMID: 35498497 PMCID: PMC9051899 DOI: 10.1039/d0ra00570c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2020] [Accepted: 03/28/2020] [Indexed: 12/28/2022] Open
Abstract
An efficient method was developed for synthesis of benzoxazoles by Cu-catalyzed intramolecular O-arylation of o-halobenzanilides in water. This strategy provides several advantages, such as high yields, water as a green solvent and functional groups tolerance. An efficient method was developed for synthesis of benzoxazoles by Cu-catalyzed intramolecular O-arylation of o-halobenzanilides in water.![]()
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Affiliation(s)
- Yanling Tang
- College of Pharmaceutical Science, Yunnan University of Chinese Medicine Kunming 650500 P.R. China +86 871 65918232 +86 871 65918232
| | - Minxin Li
- College of Pharmaceutical Science, Yunnan University of Chinese Medicine Kunming 650500 P.R. China +86 871 65918232 +86 871 65918232
| | - Hui Gao
- College of Pharmaceutical Science, Yunnan University of Chinese Medicine Kunming 650500 P.R. China +86 871 65918232 +86 871 65918232
| | - Gaoxiong Rao
- College of Pharmaceutical Science, Yunnan University of Chinese Medicine Kunming 650500 P.R. China +86 871 65918232 +86 871 65918232
| | - Zewei Mao
- College of Pharmaceutical Science, Yunnan University of Chinese Medicine Kunming 650500 P.R. China +86 871 65918232 +86 871 65918232
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12
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Henry MC, Abbinante VM, Sutherland A. Iron-Catalyzed Regioselective Synthesis of 2-Arylbenzoxazoles and 2-Arylbenzothiazoles via Alternative Reaction Pathways. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000014] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Martyn C. Henry
- WestCHEM, School of Chemistry; The Joseph Black Building; University of Glasgow; G12 8QQ Glasgow United Kingdom
| | - Vincenzo Mirco Abbinante
- WestCHEM, School of Chemistry; The Joseph Black Building; University of Glasgow; G12 8QQ Glasgow United Kingdom
| | - Andrew Sutherland
- WestCHEM, School of Chemistry; The Joseph Black Building; University of Glasgow; G12 8QQ Glasgow United Kingdom
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13
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Boddapati S, Saketi JMR, Mutchu BR, Bollikolla HB, Adil SF, Khan M. Copper promoted desulfurization and C-N cross coupling reactions: Simple approach to the synthesis of substituted 2-aminobenzoxazoles and 2,5-disubstituted tetrazole amines. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2019.09.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
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14
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Yang Z, Zhou L, Liu Y, Lu H, Wu F, Xie Y, Liu J. Base‐Promoted Metal‐Free Arylation of Benzoxazoles with Phenylglyoxylic Acids. ChemistrySelect 2019. [DOI: 10.1002/slct.201903641] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Zhiyong Yang
- School of Chemical EngineeringGuizhou Institute of Technology Guizhou Province Guiyang 550003 P. R. China
| | - Liang Zhou
- School of Chemical EngineeringGuizhou Institute of Technology Guizhou Province Guiyang 550003 P. R. China
| | - Ying Liu
- School of Chemical EngineeringGuizhou Institute of Technology Guizhou Province Guiyang 550003 P. R. China
| | - Hongwen Lu
- School of Chemical EngineeringGuizhou Institute of Technology Guizhou Province Guiyang 550003 P. R. China
| | - Fengxuan Wu
- School of Chemical EngineeringGuizhou Institute of Technology Guizhou Province Guiyang 550003 P. R. China
| | - Yuxin Xie
- School of Chemical EngineeringGuizhou Institute of Technology Guizhou Province Guiyang 550003 P. R. China
| | - Jianle Liu
- School of Chemical EngineeringGuizhou Institute of Technology Guizhou Province Guiyang 550003 P. R. China
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15
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Zhang Y, Ji M. Iodine Promoted One-Pot Synthesis of 2-Aryl Benzoxazoles from Amidoximes via Oxidative Cyclization and Ring Contraction. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901468] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yong Zhang
- School of Biological Science and Medical Engineering; Southeast University; Dingjiaqiao 87 210009 Nanjing China
| | - Min Ji
- School of Biological Science and Medical Engineering; Southeast University; Dingjiaqiao 87 210009 Nanjing China
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16
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Shi Y, Zhou Q, Du F, Fu Y, Du Y, Fang T, Chen G. Iridium-catalyzed intramolecular C N and C O/S cross-coupling reactions: Preparation of benzoazole derivatives. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.151082] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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17
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Luo Z, Wu H, Li Y, Chen Y, Nie J, Lu S, Zhu Y, Zeng Z. Cesium Fluoride and Copper‐Catalyzed One‐Pot Synthesis of Benzoxazoles
via
a Site‐Selective Amide C−N Bond Cleavage. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900485] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Zhongfeng Luo
- College of Chemistry and Environment South China Normal University Guangzhou 510006 People's Republic of China
| | - Hongxiang Wu
- College of Chemistry and Environment South China Normal University Guangzhou 510006 People's Republic of China
| | - Yue Li
- College of Chemistry and Environment South China Normal University Guangzhou 510006 People's Republic of China
| | - Yuwen Chen
- College of Chemistry and Environment South China Normal University Guangzhou 510006 People's Republic of China
| | - Jingyi Nie
- College of Chemistry and Environment South China Normal University Guangzhou 510006 People's Republic of China
| | - Siqi Lu
- College of Chemistry and Environment South China Normal University Guangzhou 510006 People's Republic of China
| | - Yulin Zhu
- College of Chemistry and Environment South China Normal University Guangzhou 510006 People's Republic of China
| | - Zhuo Zeng
- College of Chemistry and Environment South China Normal University Guangzhou 510006 People's Republic of China
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry Chinese Academy of Science 345 Lingling Road Shanghai 200032 People's Republic of China
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18
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Naikwade A, Jagadale M, Kale D, Gajare S, Bansode P, Rashinkar G. Intramolecular O‐arylation using nano‐magnetite supported
N
‐heterocyclic carbene‐copper complex with wingtip ferrocene. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.5066] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
| | - Megha Jagadale
- Department of ChemistryShivaji University Kolhapur 416004, M.S. India
| | - Dolly Kale
- Department of ChemistryShivaji University Kolhapur 416004, M.S. India
| | - Shivanand Gajare
- Department of ChemistryShivaji University Kolhapur 416004, M.S. India
| | - Prakash Bansode
- Department of ChemistryShivaji University Kolhapur 416004, M.S. India
| | - Gajanan Rashinkar
- Department of ChemistryShivaji University Kolhapur 416004, M.S. India
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19
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Oshimoto K, Tsuji H, Kawatsura M. Synthesis of benzoxazoles via the copper-catalyzed hydroamination of alkynones with 2-aminophenols. Org Biomol Chem 2019; 17:4225-4229. [DOI: 10.1039/c9ob00572b] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We describe herein the synthetic method to benzoxazole derivatives via the copper-catalyzed hydroamination of alkynones with 2-aminophenols.
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Affiliation(s)
- Kohei Oshimoto
- Department of Chemistry
- College of Humanities & Sciences
- Nihon University
- Tokyo 156-8550
- Japan
| | - Hiroaki Tsuji
- Department of Chemistry
- College of Humanities & Sciences
- Nihon University
- Tokyo 156-8550
- Japan
| | - Motoi Kawatsura
- Department of Chemistry
- College of Humanities & Sciences
- Nihon University
- Tokyo 156-8550
- Japan
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20
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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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21
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Tangellamudi ND, Shinde SB, Pooladanda V, Godugu C, Balasubramanian S. Facile synthesis of 2-aryl 5-hydroxy benzo[d]oxazoles and their in vitro anti-proliferative effects on various cancer cell lines. Bioorg Med Chem Lett 2018; 28:3639-3647. [DOI: 10.1016/j.bmcl.2018.10.038] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 09/20/2018] [Accepted: 10/24/2018] [Indexed: 10/28/2022]
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22
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CuNiFe a Magnetic Nano‐Catalyst: an Efficient Catalyst for the Selective Synthesis of Benzoxazoles. ChemistrySelect 2018. [DOI: 10.1002/slct.201801462] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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23
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Tang L, Yang Z, Sun T, Zhang D, Ma X, Rao W, Zhou Y. Unexpected Decarboxylation-Triggered o
-Hydroxyl-Controlled Redox Condensation of Phenylglycines with 2-Nitrophenols in Aqueous Media. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800586] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Lin Tang
- College of Chemistry and Chemical Engineering; Xinyang Normal University; Xinyang Henan 464000 People's Republic of China
- Henan Province Key Laboratory of Utilization of Non-metallic Mineral in the Sourth of Henan; Xinyang Henan 464000 People's Republic of China
| | - Zhen Yang
- College of Chemistry and Chemical Engineering; Xinyang Normal University; Xinyang Henan 464000 People's Republic of China
| | - Tian Sun
- College of Chemistry and Chemical Engineering; Xinyang Normal University; Xinyang Henan 464000 People's Republic of China
| | - Di Zhang
- College of Chemistry and Chemical Engineering; Xinyang Normal University; Xinyang Henan 464000 People's Republic of China
| | - Xiantao Ma
- College of Chemistry and Chemical Engineering; Xinyang Normal University; Xinyang Henan 464000 People's Republic of China
| | - Weihao Rao
- College of Chemistry and Chemical Engineering; Xinyang Normal University; Xinyang Henan 464000 People's Republic of China
| | - Yuqiang Zhou
- College of Chemistry and Chemical Engineering; Xinyang Normal University; Xinyang Henan 464000 People's Republic of China
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24
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Yang B, Hu W, Zhang S. Synthesis of benzoxazoles via an iron-catalyzed domino C-N/C-O cross-coupling reaction. RSC Adv 2018; 8:2267-2270. [PMID: 35541485 PMCID: PMC9077259 DOI: 10.1039/c7ra13080e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Accepted: 12/29/2017] [Indexed: 01/19/2023] Open
Abstract
An eco-friendly and efficient method has been developed for the synthesis of 2-arylbenzoxazoles via a domino iron-catalyzed C–N/C–O cross-coupling reaction. Some of the issues typically encountered during the synthesis of 2-arylbenzoxazoles in the presence of palladium and copper catalysts, including poor substrate scope and long reaction times have been addressed using this newly developed iron-catalyzed method. The synthesis of benzoxazoles via an iron-catalyzed cascade C–N and C–O coupling is described.![]()
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Affiliation(s)
- Bo Yang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University Suzhou 215123 P. R. China
| | - Weiye Hu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University Suzhou 215123 P. R. China
| | - Songlin Zhang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University Suzhou 215123 P. R. China
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25
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Safaei E, Alaji Z, Panahi F, Wojtczak A, Jagličić JZ. Synthesis and characterization of a novel oxo-bridged binuclear iron( iii) complex: its catalytic application in the synthesis of benzoxazoles using benzyl alcohol in water. NEW J CHEM 2018. [DOI: 10.1039/c8nj00921j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A novel oxo-bridged binuclear iron(iii) complex was found to be an efficient catalyst in the synthesis of benzoxazoles from benzyl alcohols.
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Affiliation(s)
- Elham Safaei
- Department of Chemistry
- College of Sciences
- Shiraz University
- Shiraz
- Iran
| | - Zahra Alaji
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Zanjan
- Iran
| | - Farhad Panahi
- Department of Chemistry
- College of Sciences
- Shiraz University
- Shiraz
- Iran
| | | | - Janez Zvonko Jagličić
- Institute of Mathematics
- Physics and Mechanics & Faculty of Civil and Geodetic Engineering
- University of Ljubljana
- Ljubljana
- Slovenia
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26
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27
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Vlachou EEN, Armatas GS, Litinas KE. Synthesis of Fused Oxazolocoumarins from o
-Hydroxynitrocoumarins and Benzyl Alcohol Under Gold Nanoparticles or FeCl 3
Catalysis. J Heterocycl Chem 2017. [DOI: 10.1002/jhet.2842] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Evangelia-Eirini N. Vlachou
- Laboratory of Organic Chemistry, Department of Chemistry; Aristotle University of Thessaloniki; Thessaloniki 54124 Greece
| | - Gerasimos S. Armatas
- Department of Materials Science and Technology; University of Crete; Vassilika Vouton Heraklion 71003 Greece
| | - Konstantinos E. Litinas
- Laboratory of Organic Chemistry, Department of Chemistry; Aristotle University of Thessaloniki; Thessaloniki 54124 Greece
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28
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Li JS, Da YD, Chen GQ, Yang Q, Li ZW, Yang F, Huang PM. Solvent-, and Catalyst-free Acylation of Anilines with Meldrum's Acids: ANeat Access to Anilides. ChemistrySelect 2017. [DOI: 10.1002/slct.201601965] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Jiang-Sheng Li
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation; School of Chemistry and Biological Engineering; Changsha University of Science & Technology; Changsha 410114 People's Republic of China
| | - Yu-Dong Da
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation; School of Chemistry and Biological Engineering; Changsha University of Science & Technology; Changsha 410114 People's Republic of China
| | - Guo-Qin Chen
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation; School of Chemistry and Biological Engineering; Changsha University of Science & Technology; Changsha 410114 People's Republic of China
| | - Qian Yang
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation; School of Chemistry and Biological Engineering; Changsha University of Science & Technology; Changsha 410114 People's Republic of China
| | - Zhi-Wei Li
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation; School of Chemistry and Biological Engineering; Changsha University of Science & Technology; Changsha 410114 People's Republic of China
| | - Fan Yang
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation; School of Chemistry and Biological Engineering; Changsha University of Science & Technology; Changsha 410114 People's Republic of China
| | - Peng-Mian Huang
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation; School of Chemistry and Biological Engineering; Changsha University of Science & Technology; Changsha 410114 People's Republic of China
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29
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Srivastava A, Shukla G, Singh MS. p -Toluenesulfonic acid-catalyzed metal-free formal [4 + 1] heteroannulation via N H/O H/S H functionalization: One-pot access to 2-aryl/hetaryl/alkyl benzazole derivatives. Tetrahedron 2017. [DOI: 10.1016/j.tet.2016.12.073] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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30
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Chang W, Sun Y, Huang Y. One-pot green synthesis of benzoxazole derivatives through molecular sieve-catalyzed oxidative cyclization reaction. HETEROATOM CHEMISTRY 2017. [DOI: 10.1002/hc.21360] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Weichieh Chang
- Department of Applied Chemistry; National University of Kaohsiung; Kaohsiung Taiwan
| | - Yukai Sun
- Department of Chemistry; National Tsing Hua University; Hsinchu Taiwan
| | - Yungtzung Huang
- Department of Applied Chemistry; National University of Kaohsiung; Kaohsiung Taiwan
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31
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Singh AS, Singh M, Mishra N, Mishra S, Agrahari AK, Tiwari VK. N-Acylbenzotriazole as Efficient Ligand in Copper-CatalyzedO-Arylation Leading to Diverse Benzoxazoles. ChemistrySelect 2017. [DOI: 10.1002/slct.201601116] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Anoop S. Singh
- Department of Chemistry, Institute of Science; Banaras Hindu University; Varanasi- 221005 India
| | - Mala Singh
- Department of Chemistry, Institute of Science; Banaras Hindu University; Varanasi- 221005 India
| | - Nidhi Mishra
- Department of Chemistry, Institute of Science; Banaras Hindu University; Varanasi- 221005 India
| | - Snigdha Mishra
- Department of Chemistry, Institute of Science; Banaras Hindu University; Varanasi- 221005 India
| | - Anand K. Agrahari
- Department of Chemistry, Institute of Science; Banaras Hindu University; Varanasi- 221005 India
| | - Vinod K. Tiwari
- Department of Chemistry, Institute of Science; Banaras Hindu University; Varanasi- 221005 India
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32
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Liu J, Wang C, Ma X, Shi X, Wang X, Li H, Xu Q. Simple Synthesis of Benzazoles by Substrate-Promoted CuI-Catalyzed Aerobic Oxidative Cyclocondensation of o-Thio/Amino/Hydroxyanilines and Amines under Air. Catal Letters 2016. [DOI: 10.1007/s10562-016-1818-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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33
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Sen C, Sahoo T, Galani SM, Panda AB, Ghosh SC. Synthesis of 2-Arylbenzoxazoles by Hetereogeneous γ-MnO2Catalyzed Redox Reaction of o-Nitrophenol with Benzyl Alcohols or Benzyl Amines. ChemistrySelect 2016. [DOI: 10.1002/slct.201600450] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Chiranjit Sen
- Natural Products and Green Chemistry Division
- Academy of Scientific and Innovative Research; CSIR-Central Salt and Marine Chemicals Research Institute, G.B. Marg; Bhavnagar-364002 Gujarat India
| | - Tapan Sahoo
- Natural Products and Green Chemistry Division
- Academy of Scientific and Innovative Research; CSIR-Central Salt and Marine Chemicals Research Institute, G.B. Marg; Bhavnagar-364002 Gujarat India
| | - Sunil M Galani
- Natural Products and Green Chemistry Division
- Academy of Scientific and Innovative Research; CSIR-Central Salt and Marine Chemicals Research Institute, G.B. Marg; Bhavnagar-364002 Gujarat India
| | - A. B Panda
- Inorganic Materials and Catalysis Division
- Academy of Scientific and Innovative Research; CSIR-Central Salt and Marine Chemicals Research Institute, G.B. Marg; Bhavnagar-364002 Gujarat India
| | - Subhash C. Ghosh
- Natural Products and Green Chemistry Division
- Academy of Scientific and Innovative Research; CSIR-Central Salt and Marine Chemicals Research Institute, G.B. Marg; Bhavnagar-364002 Gujarat India
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34
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Lai YL, Ye JS, Huang JM. Electrochemical Synthesis of Benzazoles from Alcohols and o
-Substituted Anilines with a Catalytic Amount of CoII
Salt. Chemistry 2016; 22:5425-9. [DOI: 10.1002/chem.201505074] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Indexed: 12/12/2022]
Affiliation(s)
- Yin-Long Lai
- School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou Guangdong 510640 P. R. China
| | - Jian-Shan Ye
- School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou Guangdong 510640 P. R. China
| | - Jing-Mei Huang
- School of Chemistry and Chemical Engineering; South China University of Technology; Guangzhou Guangdong 510640 P. R. China
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35
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Urzúa JI, Contreras R, Salas CO, Tapia RA. N-Heterocyclic carbene copper(i) complex-catalyzed synthesis of 2-aryl benzoxazoles and benzothiazoles. RSC Adv 2016. [DOI: 10.1039/c6ra18510j] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new an efficient synthesis of 2-aryl benzoxazoles and benzothiazoles by intramolecular cyclization of 2-haloanilides/2-halothioanilides using a copper(i)-NHC complex is described.
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Affiliation(s)
- Julio I. Urzúa
- Facultad de Química
- Pontificia Universidad Católica de Chile
- Santiago
- Chile
| | - Renato Contreras
- Departamento de Química
- Facultad de Ciencias
- Universidad de Chile
- Santiago
- Chile
| | - Cristian O. Salas
- Facultad de Química
- Pontificia Universidad Católica de Chile
- Santiago
- Chile
| | - Ricardo A. Tapia
- Facultad de Química
- Pontificia Universidad Católica de Chile
- Santiago
- Chile
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36
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Hajipour AR, Khorsandi Z. A comparative study of the catalytic activity of Co- and CoFe2O4-NPs in C–N and C–O bond formation: synthesis of benzimidazoles and benzoxazoles from o-haloanilides. NEW J CHEM 2016. [DOI: 10.1039/c6nj02293f] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Herein, new methods and a comparison of the results for dehalogenative intramolecular C–X bond formation using two inexpensive and efficient catalysts are reported.
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Affiliation(s)
- Abdol R. Hajipour
- Department of Chemistry
- Isfahan University of Technology
- Isfahan 84156
- Islamic Republic of Iran
- Department of Neuroscience
| | - Zahra Khorsandi
- Department of Chemistry
- Isfahan University of Technology
- Isfahan 84156
- Islamic Republic of Iran
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37
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Ligand-promoted, copper nanoparticles catalyzed one-pot synthesis of substituted benzoxazoles from 2-bromoanilines and acyl chlorides. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.10.078] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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38
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Zhu D, Liu P, Lu W, Wang H, Luo B, Hu Y, Huang P, Wen S. Relayed Regioselective Alkynylation/Olefination of Unsymmetrical Cyclic Diaryliodonium Species Catalyzed by Cu and Pd: Affording Fluorescent Cytotoxic Benzoxazoles. Chemistry 2015; 21:18915-20. [PMID: 26516085 DOI: 10.1002/chem.201503791] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Indexed: 11/10/2022]
Abstract
Although cyclic diaryliodonium species have the potential to act as valuable synthons for cascade transformations, they still remain largely unexplored. The regioselectivity associated with unsymmetrical cyclic diaryliodonium species has previously been known to pose a challenge. A regioselective relayed alkynylation and olefination of unsymmetrical cyclic diaryliodonium species has been achieved by installation of a directing amido group. These relayed transformations were delayed until an oxazole ring had formed, delivering a series of unique fluorescent benzoxazoles. Moreover, some of these synthetic benzoxazoles showed apparent inhibitory activity against malignant cancer cells. Further confocal visualization revealed that benzoxazoles targeted cell nuclei. These findings might provide a novel structural scaffold to develop desirable anticancer agents.
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Affiliation(s)
- Daqian Zhu
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University 651 Dongfeng East Road, Guangzhou 510060 (China).,School of Pharmaceutical Sciences, Sun Yat-sen University, 132 Waihuan East Road, Guangzhou 510006 (China)
| | - Panpan Liu
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University 651 Dongfeng East Road, Guangzhou 510060 (China)
| | - Wenhua Lu
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University 651 Dongfeng East Road, Guangzhou 510060 (China)
| | - Haiwen Wang
- School of Pharmaceutical Sciences, Sun Yat-sen University, 132 Waihuan East Road, Guangzhou 510006 (China)
| | - Bingling Luo
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University 651 Dongfeng East Road, Guangzhou 510060 (China).,School of Pharmaceutical Sciences, Sun Yat-sen University, 132 Waihuan East Road, Guangzhou 510006 (China)
| | - Yumin Hu
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University 651 Dongfeng East Road, Guangzhou 510060 (China)
| | - Peng Huang
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University 651 Dongfeng East Road, Guangzhou 510060 (China).
| | - Shijun Wen
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University 651 Dongfeng East Road, Guangzhou 510060 (China). .,School of Pharmaceutical Sciences, Sun Yat-sen University, 132 Waihuan East Road, Guangzhou 510006 (China).
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39
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Catalytic stereoselective addition to alkynes. Borylation or silylation promoted by magnesia-supported iron oxide and cis-diboronation or silaboration by supported platinum nanoparticles. J Catal 2015. [DOI: 10.1016/j.jcat.2015.05.006] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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40
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Nimnual P, Tummatorn J, Thongsornkleeb C, Ruchirawat S. Utility of Nitrogen Extrusion of Azido Complexes for the Synthesis of Nitriles, Benzoxazoles, and Benzisoxazoles. J Org Chem 2015; 80:8657-67. [DOI: 10.1021/acs.joc.5b01305] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Phongprapan Nimnual
- Program
on Chemical Biology, Center of Excellence on Environmental Health
and Toxicology (EHT), Ministry of Education, Chulabhorn Graduate Institute, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand
| | - Jumreang Tummatorn
- Program
on Chemical Biology, Center of Excellence on Environmental Health
and Toxicology (EHT), Ministry of Education, Chulabhorn Graduate Institute, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand
- Laboratory
of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng
Phet 6, Laksi, Bangkok 10210, Thailand
| | - Charnsak Thongsornkleeb
- Program
on Chemical Biology, Center of Excellence on Environmental Health
and Toxicology (EHT), Ministry of Education, Chulabhorn Graduate Institute, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand
- Laboratory
of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng
Phet 6, Laksi, Bangkok 10210, Thailand
| | - Somsak Ruchirawat
- Program
on Chemical Biology, Center of Excellence on Environmental Health
and Toxicology (EHT), Ministry of Education, Chulabhorn Graduate Institute, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand
- Laboratory
of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng
Phet 6, Laksi, Bangkok 10210, Thailand
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41
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Shi X, Guo J, Liu J, Ye M, Xu Q. Unexpectedly Simple Synthesis of Benzazoles bytBuONa-Catalyzed Direct Aerobic Oxidative Cyclocondensation ofo-Thio/Hydroxy/Aminoanilines with Alcohols under Air. Chemistry 2015; 21:9988-93. [DOI: 10.1002/chem.201501184] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Indexed: 12/31/2022]
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42
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Ahmed A, Singha R, Ray JK. Ligand-free copper powder-catalyzed and KOtBu-accelerated expeditious synthesis of substituted benzoxazoles. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.03.067] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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43
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Affiliation(s)
- Ingmar Bauer
- Department Chemie, Technische Universität Dresden, Bergstraße 66, 01069 Dresden, Germany
| | - Hans-Joachim Knölker
- Department Chemie, Technische Universität Dresden, Bergstraße 66, 01069 Dresden, Germany
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44
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Song XR, Qiu YF, Song B, Hao XH, Han YP, Gao P, Liu XY, Liang YM. BF3·Et2O-Promoted Cleavage of the Csp–Csp2 Bond of 2-Propynolphenols/Anilines: Route to C2-Alkenylated Benzoxazoles and Benzimidazoles. J Org Chem 2015; 80:2263-71. [DOI: 10.1021/jo502761x] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Xian-Rong Song
- State Key Laboratory
of Applied Organic
Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Yi-Feng Qiu
- State Key Laboratory
of Applied Organic
Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Bo Song
- State Key Laboratory
of Applied Organic
Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Xin-Hua Hao
- State Key Laboratory
of Applied Organic
Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Ya-Ping Han
- State Key Laboratory
of Applied Organic
Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Pin Gao
- State Key Laboratory
of Applied Organic
Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Xue-Yuan Liu
- State Key Laboratory
of Applied Organic
Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Yong-Min Liang
- State Key Laboratory
of Applied Organic
Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
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45
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Zhang G, Wang P, Yang F, Wu Y. Copper-catalyzed synthesis of 2-arylbenzoxazoles from o -aminophenol derivatives with arylmethyl chlorides. Tetrahedron 2015. [DOI: 10.1016/j.tet.2014.11.040] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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46
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Miao D, Shi X, He G, Tong Y, Jiang Z, Han S. One-pot synthesis of 2-arylbenzoxazole derivatives via Cu(I) catalyzed C–N/C–O coupling of N-(2-chloro-phenyl)-2-halo-benzamides and primary amines. Tetrahedron 2015. [DOI: 10.1016/j.tet.2014.12.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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47
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Gopalaiah K, Chandrudu SN. Iron(ii) bromide-catalyzed oxidative coupling of benzylamines with ortho-substituted anilines: synthesis of 1,3-benzazoles. RSC Adv 2015. [DOI: 10.1039/c4ra12490a] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An iron(ii) bromide-catalyzed oxidative coupling of benzylamines with 2-amino/hydroxy/mercapto-anilines has been developed, allowing the synthesis of a diversity of substituted 1,3-benzazoles in good to excellent yields.
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48
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Zhang X, Huang R, Marrot J, Coeffard V, Xiong Y. Hypervalent iodine-mediated synthesis of benzoxazoles and benzimidazoles via an oxidative rearrangement. Tetrahedron 2015. [DOI: 10.1016/j.tet.2014.11.066] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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49
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Yang D, Liu P, Zhang N, Wei W, Yue M, You J, Wang H. Mesoporous Poly(melamine-formaldehyde): A Green and Recyclable Heterogeneous Organocatalyst for the Synthesis of Benzoxazoles and Benzothiazoles Using Dioxygen as Oxidant. ChemCatChem 2014. [DOI: 10.1002/cctc.201402628] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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50
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