1
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Song XF, Zhang LJ, Zhang XG, Tu HY. Cu-Catalyzed Carbocyclization for General Synthesis of N-Containing Heterocyclics Enabled by BrCF 2COOEt as a C1 Source. J Org Chem 2024; 89:3403-3412. [PMID: 38331393 DOI: 10.1021/acs.joc.3c02827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2024]
Abstract
A practical and efficient copper-catalyzed carbocyclization of 2-functionalized anilines with ethyl bromodifluoroacetate has been developed. Ethyl bromodifluoroacetate is employed as the C1 source via quadruple cleavage in this transformation. This reaction can afford a variety of N-containing heterocyclics with satisfactory yields and excellent functional group compatibility.
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Affiliation(s)
- Xiao-Fang Song
- College of Safety Science and Engineering, Nanjing Tech University, Nanjing 210009, China
- School of Intelligent Manufacturing and Electronic Engineering, Wenzhou University of Technology, Wenzhou 325035, China
| | - Li-Jing Zhang
- College of Safety Science and Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Xing-Guo Zhang
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Hai-Yong Tu
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
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2
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Wang CY, Tian R, Li JX, Zhu YM. Nickel/Copper Cooperative Catalysis Decarbonylative Heteroarylation of Aryl Anhydrides with Benzoxazoles via C-O/C-H Coupling. J Org Chem 2023; 88:3378-3385. [PMID: 36579720 DOI: 10.1021/acs.joc.2c01449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A new strategy for the synthesis of 2-arylbenzoxazole derivatives via nickel-/copper-catalyzed decarbonylative heteroarylation of aryl anhydrides via C-O/C-H coupling has been developed. The reaction is promoted by a user-friendly, inexpensive, and air- and moisture-stable Ni precatalyst. A variety of 2-arylbenzoxazole derivatives have been successfully synthesized and have good functional group tolerance in this process, which afforded products in moderate-to-excellent yields.
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Affiliation(s)
- Cheng-Yi Wang
- College of Pharmaceutical Sciences, Soochow University, Suzhou215123, China
| | - Rui Tian
- College of Pharmaceutical Sciences, Soochow University, Suzhou215123, China
| | - Jia-Xin Li
- College of Pharmaceutical Sciences, Soochow University, Suzhou215123, China
| | - Yong-Ming Zhu
- College of Pharmaceutical Sciences, Soochow University, Suzhou215123, China
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3
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Novel Synthesis of Dihydroisoxazoles by p-TsOH-Participated 1,3-Dipolar Cycloaddition of Dipolarophiles withα-Nitroketones. Molecules 2023; 28:molecules28062565. [PMID: 36985536 PMCID: PMC10052018 DOI: 10.3390/molecules28062565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 03/06/2023] [Accepted: 03/06/2023] [Indexed: 03/16/2023] Open
Abstract
This article reports in detail a method for the synthesis of 3-benzoxoxazoline by the reaction of alkenes (alkynes) and a variety of α-nitroketones in the presence of p-TsOH. The scope of alkenes is broad, including different alkenes and the alkyne. This reaction provides a convenient and efficient synthetic method of 3-benzoylisoxazolines.
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4
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Alter N, Link S, Heuser S. Microwave-Assisted One-Pot Synthesis of 2-Substituted Benzoxazoles from Nitrophenol and Carboxylic Acids. RESULTS IN CHEMISTRY 2022. [DOI: 10.1016/j.rechem.2022.100396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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5
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Kulkarni S, Kaur K, Jaitak V. Recent Developments in Oxazole Derivatives as Anticancer Agents: Review on Synthetic Strategies, Mechanism of Action and SAR studies. Anticancer Agents Med Chem 2021; 22:1859-1882. [PMID: 34525925 DOI: 10.2174/1871520621666210915095421] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 06/26/2021] [Accepted: 07/09/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Cancer is the world's third deadliest disease. Despite the availability of numerous treatments, researchers are focusing on the development of new drugs lacking resistance and toxicity issues. Many newly synthesized drugs fail to reach clinical trials due to poor pharmacokinetic properties. Therefore, there is an imperative requisite to expand novel anticancer agents with in vivo efficacy. OBJECTIVE This review emphasizes synthetic methods, contemporary strategies used for the inclusion of oxazole moiety, mechanistic targets along with comprehensive structure-activity relationship studies to provide perspective into the rational design of highly efficient oxazole-based anticancer drugs. METHODS Literature related to oxazole derivatives engaged in cancer research is reviewed. This article gives a detailed account of synthetic strategies, targets of oxazole in cancer, including STAT3, Microtubules, G-quadruplex, DNA topoisomerases, DNA damage, Protein kinases, miscellaneous targets, in vitro studies, and some SAR studies. RESULTS Oxazole derivatives possess potent anticancer activity by inhibiting novel targets such as STAT3 and G-quadruplex. Oxazoles also inhibit tubulin protein to induce apoptosis in cancer cells. Some other targets such as DNA topoisomerase enzyme, protein kinases, and miscellaneous targets including Cdc25, mitochondrial enzymes, HDAC, LSD1, HPV E2 TAD, NQO1, Aromatase, BCl-6, Estrogen receptor, GRP-78, and Keap-Nrf2 pathway are inhibited by oxazole derivatives Many derivatives showed excellent potencies on various cancer cell lines with IC50 values in nanomolar concentrations. CONCLUSION Oxazole is a five-membered heterocycle, with oxygen and nitrogen at 1 and 3 positions respectively. It is often combined with other pharmacophores in the expansion of novel anticancer drugs. In summary, oxazole is a promising entity to develop new anticancer drugs.
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Affiliation(s)
- Swanand Kulkarni
- Department of Pharmaceutical Sciences and Natural Products, Central University of Punjab, Ghudda, Bathinda, 151 401. India
| | - Kamalpreet Kaur
- Department of Pharmaceutical Sciences and Natural Products, Central University of Punjab, Ghudda, Bathinda, 151 401. India
| | - Vikas Jaitak
- Department of Pharmaceutical Sciences and Natural Products, Central University of Punjab, Ghudda, Bathinda, 151 401. India
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6
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Pan X, Xin X, Mao Y, Li X, Zhao Y, Liu Y, Zhang K, Yang X, Wang J. 3-Benzoylisoxazolines by 1,3-Dipolar Cycloaddition: Chloramine-T-Catalyzed Condensation of α-Nitroketones with Dipolarophiles. Molecules 2021; 26:molecules26123491. [PMID: 34201335 PMCID: PMC8227129 DOI: 10.3390/molecules26123491] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 06/02/2021] [Accepted: 06/03/2021] [Indexed: 11/16/2022] Open
Abstract
In this study, 3-benzoylisoxazolines were synthesized by reacting alkenes with various α-nitroketones using chloramine-T as the base. The scope of α-nitroketones and alkenes is extensive, including different alkenes and alkynes to form various isoxazolines and isoxazoles. The use of chloramine-T, as the low-cost, easily handled, moderate base for 1,3-dipolar cycloaddition is attractive.
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Affiliation(s)
- Xinhui Pan
- Stake Key Laboratory of Natural and Biomimetic Drugs, Department of Chemical Biology, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China;
- Key Laboratory of Xinjiang Phytomedicine Resource and Utilisation, Ministry of Education, School of Pharmaceutical Sciences, Shihezi University, Shihezi 832002, China; (X.X.); (X.L.); (Y.Z.); (Y.L.); (K.Z.)
- Correspondence: (X.P.); (J.W.)
| | - Xiaobing Xin
- Key Laboratory of Xinjiang Phytomedicine Resource and Utilisation, Ministry of Education, School of Pharmaceutical Sciences, Shihezi University, Shihezi 832002, China; (X.X.); (X.L.); (Y.Z.); (Y.L.); (K.Z.)
- Department of Pharmacology, Houbo College of Xinjiang Medical University, Karamay 834000, China
| | - Ying Mao
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China;
| | - Xin Li
- Key Laboratory of Xinjiang Phytomedicine Resource and Utilisation, Ministry of Education, School of Pharmaceutical Sciences, Shihezi University, Shihezi 832002, China; (X.X.); (X.L.); (Y.Z.); (Y.L.); (K.Z.)
| | - Yanan Zhao
- Key Laboratory of Xinjiang Phytomedicine Resource and Utilisation, Ministry of Education, School of Pharmaceutical Sciences, Shihezi University, Shihezi 832002, China; (X.X.); (X.L.); (Y.Z.); (Y.L.); (K.Z.)
| | - Yidi Liu
- Key Laboratory of Xinjiang Phytomedicine Resource and Utilisation, Ministry of Education, School of Pharmaceutical Sciences, Shihezi University, Shihezi 832002, China; (X.X.); (X.L.); (Y.Z.); (Y.L.); (K.Z.)
| | - Ke Zhang
- Key Laboratory of Xinjiang Phytomedicine Resource and Utilisation, Ministry of Education, School of Pharmaceutical Sciences, Shihezi University, Shihezi 832002, China; (X.X.); (X.L.); (Y.Z.); (Y.L.); (K.Z.)
| | - Xiaoda Yang
- Stake Key Laboratory of Natural and Biomimetic Drugs, Department of Chemical Biology, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China;
- Key Laboratory of Xinjiang Phytomedicine Resource and Utilisation, Ministry of Education, School of Pharmaceutical Sciences, Shihezi University, Shihezi 832002, China; (X.X.); (X.L.); (Y.Z.); (Y.L.); (K.Z.)
| | - Jinhui Wang
- Key Laboratory of Xinjiang Phytomedicine Resource and Utilisation, Ministry of Education, School of Pharmaceutical Sciences, Shihezi University, Shihezi 832002, China; (X.X.); (X.L.); (Y.Z.); (Y.L.); (K.Z.)
- Correspondence: (X.P.); (J.W.)
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7
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Khademi Z, Nikoofar K. Applications of alkyl orthoesters as valuable substrates in organic transformations, focusing on reaction media. RSC Adv 2020; 10:30314-30397. [PMID: 35559005 PMCID: PMC9092620 DOI: 10.1039/d0ra05276k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 07/27/2020] [Indexed: 02/01/2023] Open
Abstract
In this review we focus on applications of alkyl orthoesters as valuable and efficient substrates to perform various classes of two-component and multi-component organic reactions. The article has classified them according to two aspects, which are: (i) a focus on the reaction medium (solvent-free conditions, aqueous media, and organic solvents); and (ii) an examination of product structures. Reaction accomplishment under solvent-free conditions is an eco-friendly process with the absence of volatile toxic solvents, which puts it in line with green chemistry goals. Water is an interesting choice in organic transformations due to its inexpensiveness and safety. The authors hope their assessment will help chemists to attain new approaches for utilizing alkyl orthoesters in various organic synthetic methods. The review covers the corresponding literature up to the beginning of 2020. In this review we focus on applications of alkyl orthoesters as valuable and efficient substrates to perform various classes of two-component and multi-component organic reactions.![]()
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Affiliation(s)
- Zahra Khademi
- Department of Chemistry, Faculty of Physics & Chemistry, Alzahra University P.O. Box 1993891176 Tehran Iran +982188041344 +982188041344
| | - Kobra Nikoofar
- Department of Chemistry, Faculty of Physics & Chemistry, Alzahra University P.O. Box 1993891176 Tehran Iran +982188041344 +982188041344
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8
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Affiliation(s)
- Zohreh Nazarian
- Faculty of Chemistry and Petroleum SciencesShahid Beheshti University, District 1 Daneshjou Boulevard 1983969411 Tehran Tehran Province Iran P.O. Box: 1983963113
| | - Minoo Dabiri
- Faculty of Chemistry and Petroleum SciencesShahid Beheshti University, District 1 Daneshjou Boulevard 1983969411 Tehran Tehran Province Iran P.O. Box: 1983963113
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9
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Hyo Kim B, Lee H, Bae S, Kim E, Park J. Synthetic Strategy to New Terphenyl-Type Bis-Pyrrole Arenes Starting from Highly Electron-Deficient 4-Nitroanilines with 1,4-Diketones. HETEROCYCLES 2019. [DOI: 10.3987/com-19-14190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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10
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Synthesis of 3,4-diaryl- and 4-acyl-3-arylpyrroles and study of their antimitotic activity. Russ Chem Bull 2018. [DOI: 10.1007/s11172-018-2150-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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11
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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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12
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Yu X, Chen K, Wang Q, Zhang W, Zhu J. Synthesis of 2,5-disubstituted oxazoles via cobalt(iii)-catalyzed cross-coupling of N-pivaloyloxyamides and alkynes. Chem Commun (Camb) 2018; 54:1197-1200. [DOI: 10.1039/c7cc08611c] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
An efficient synthesis of 2,5-disubstituted oxazoles via cobalt(iii)-catalyzed cross-coupling of N-pivaloyloxyamides and alkynes is described herein.
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Affiliation(s)
- Xiaolong Yu
- Department of Polymer Science and Engineering
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Coordination Chemistry
- Nanjing National Laboratory of Microstructures
- Collaborative Innovation Center of Chemistry for Life Sciences
| | - Kehao Chen
- Department of Polymer Science and Engineering
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Coordination Chemistry
- Nanjing National Laboratory of Microstructures
- Collaborative Innovation Center of Chemistry for Life Sciences
| | - Qi Wang
- Department of Polymer Science and Engineering
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Coordination Chemistry
- Nanjing National Laboratory of Microstructures
- Collaborative Innovation Center of Chemistry for Life Sciences
| | - Wenjing Zhang
- Department of Polymer Science and Engineering
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Coordination Chemistry
- Nanjing National Laboratory of Microstructures
- Collaborative Innovation Center of Chemistry for Life Sciences
| | - Jin Zhu
- Department of Polymer Science and Engineering
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Coordination Chemistry
- Nanjing National Laboratory of Microstructures
- Collaborative Innovation Center of Chemistry for Life Sciences
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13
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Ojha NK, Zyryanov GV, Majee A, Charushin VN, Chupakhin ON, Santra S. Copper nanoparticles as inexpensive and efficient catalyst: A valuable contribution in organic synthesis. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.10.004] [Citation(s) in RCA: 113] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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14
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Robles AJ, McCowen S, Cai S, Glassman M, Ruiz F, Cichewicz RH, McHardy SF, Mooberry SL. Structure-Activity Relationships of New Natural Product-Based Diaryloxazoles with Selective Activity against Androgen Receptor-Positive Breast Cancer Cells. J Med Chem 2017; 60:9275-9289. [PMID: 29053266 DOI: 10.1021/acs.jmedchem.7b01228] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Targeted therapies for ER+/PR+ and HER2-amplified breast cancers have improved patient survival, but there are no therapies for triple negative breast cancers (TNBC) that lack expression of estrogen and progesterone receptors (ER/PR), or amplification or overexpression of HER2. Gene expression profiling of TNBC has identified molecular subtypes and representative cell lines. An extract of the Texas native plant Amyris texana was found to have selective activity against MDA-MB-453 cells, a model of the luminal androgen receptor (LAR) subtype of TNBC. Bioassay-guided fractionation identified two oxazole natural products with selective activity against this cell line. Conducted analog synthesis and structure-activity relationship studies provided analogs with more potent and selective activity against two LAR subtype cell line models, culminating in the discovery of compound 30 (CIDD-0067106). Lead compounds discovered have potent and selective antiproliferative activities, and mechanisms of action studies show they inhibit the activity of the mTORC1 pathway.
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Affiliation(s)
| | - Shelby McCowen
- Center for Innovative Drug Discovery, Department of Chemistry, The University of Texas at San Antonio , 1 UTSA Circle, San Antonio, Texas 78249, United States
| | | | - Michaels Glassman
- Center for Innovative Drug Discovery, Department of Chemistry, The University of Texas at San Antonio , 1 UTSA Circle, San Antonio, Texas 78249, United States
| | - Francisco Ruiz
- Center for Innovative Drug Discovery, Department of Chemistry, The University of Texas at San Antonio , 1 UTSA Circle, San Antonio, Texas 78249, United States
| | | | - Stanton F McHardy
- Center for Innovative Drug Discovery, Department of Chemistry, The University of Texas at San Antonio , 1 UTSA Circle, San Antonio, Texas 78249, United States
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15
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Steinberg DF, Turk MC, Kalyani D. Nickel-Catalyzed C-H Arylation of Benzoxazoles and Oxazoles: Benchmarking the Influence of Electronic, Steric and Leaving Group Variations in Phenolic Electrophiles. Tetrahedron 2017; 73:2196-2209. [PMID: 29051675 PMCID: PMC5642964 DOI: 10.1016/j.tet.2017.02.021] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Deborah F. Steinberg
- Department of Chemistry, St. Olaf College, 1520 St. Olaf Avenue, Northfield, Minnesota 55057, USA
| | - Morgan C. Turk
- Department of Chemistry, St. Olaf College, 1520 St. Olaf Avenue, Northfield, Minnesota 55057, USA
| | - Dipannita Kalyani
- Department of Chemistry, St. Olaf College, 1520 St. Olaf Avenue, Northfield, Minnesota 55057, USA
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16
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17
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Naeimi H, Rahmatinejad S. Convenient Ultrasound Promoted Synthesis of 2-Aryl Benzoxazoles in the Presence of KCN/Ionic Liquid as an Efficient Catalyst under Mild Conditions. Polycycl Aromat Compd 2016. [DOI: 10.1080/10406638.2015.1053503] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Hossein Naeimi
- Department of Organic Chemistry, University of Kashan, Kashan, Iran
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18
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Dongare SB, Chavan HV, Surwase DN, Bhale PS, Mule YB, Bandgar BP. Indium Trichloride (InCl3) Catalyzed Synthesis of Fused 7-Azaindole Derivatives Using Domino Knoevenagel-Michael Reaction. J CHIN CHEM SOC-TAIP 2016. [DOI: 10.1002/jccs.201500540] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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19
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Naeimi H, Rahmatinejad S, Nazifi ZS. A mild convenient ultrasound assisted synthesis of 2-aryl benzoxazoles catalyzed by KCN/MWCNT as an efficient heterogeneous nanocatalyst. J Taiwan Inst Chem Eng 2016. [DOI: 10.1016/j.jtice.2015.05.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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20
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Kim BH, Bae S, Go A, Lee H, Gong C, Lee BM. Synthesis of two distinct pyrrole moiety-containing arenes from nitroanilines using Paal–Knorr followed by an indium-mediated reaction. Org Biomol Chem 2016; 14:265-76. [DOI: 10.1039/c5ob02101d] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Synthesis of arenes substituted with two different substituted-pyrrole moieties was investigated.
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Affiliation(s)
- Byeong Hyo Kim
- Department of Chemistry
- Kwangwoon University
- Seoul 139-701
- Republic of Korea
| | - Seolhee Bae
- Department of Chemistry
- Kwangwoon University
- Seoul 139-701
- Republic of Korea
| | - Ahra Go
- Department of Chemistry
- Kwangwoon University
- Seoul 139-701
- Republic of Korea
| | - Hyunseung Lee
- Department of Chemistry
- Kwangwoon University
- Seoul 139-701
- Republic of Korea
| | - Cheoloh Gong
- Department of Chemistry
- Kwangwoon University
- Seoul 139-701
- Republic of Korea
| | - Byung Min Lee
- Korea Research Institute of Chemical Technology
- Taejon 305-600
- Republic of Korea
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21
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Sarma MJ, Borah AJ, Rajbongshi KK, Phukan P. Formation of new C–O and C–N bonds via base promoted Csp2–Csp3 bond cleavage of α-nitro ketone. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.11.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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22
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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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23
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Aksenov AV, Smirnov AN, Aksenov NA, Bijieva AS, Aksenova IV, Rubin M. Benzimidazoles and benzoxazoles via the nucleophilic addition of anilines to nitroalkanes. Org Biomol Chem 2015; 13:4289-95. [PMID: 25758157 DOI: 10.1039/c5ob00131e] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
PPA-induced umpolung triggers efficient nucleophilic addition of unactivated anilines to nitroalkanes to produce N-hydroxyimidamides. The latter undergo sequential acid-promoted cyclocondensation with ortho-OH or ortho-NHR moieties to afford benzoxazoles and benzimidazoles, respectively.
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Affiliation(s)
- Alexander V Aksenov
- Department of Chemistry, North Caucasus Federal University, 1a Pushkin St., Stavropol 355009, Russian Federation.
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24
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Go A, Lee G, Kim J, Bae S, Lee BM, Kim BH. One-pot synthesis of quinoxalines from reductive coupling of 2-nitroanilines and 1,2-diketones using indium. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.01.007] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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25
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Elwahy AHM, Shaaban MR. Synthesis of heterocycles and fused heterocycles catalyzed by nanomaterials. RSC Adv 2015. [DOI: 10.1039/c5ra11421g] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
The application of nanomaterials as heterogeneous catalyst for the synthesis of different heterocyclic systems is reviewed.
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26
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Mane V, Kumar T, Pradhan S, Katiyar S, Namboothiri INN. One-pot regioselective synthesis of functionalized and fused furans from Morita–Baylis–Hillman and Rauhut–Currier adducts of nitroalkenes. RSC Adv 2015. [DOI: 10.1039/c5ra11471c] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Functionalized and fused furans were synthesized by a one-pot regioselective cascade reaction from Morita–Baylis–Hillman acetates and Rauhut–Currier adducts of nitroalkenes.
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Affiliation(s)
- Vaijinath Mane
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Tarun Kumar
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Sourav Pradhan
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Savita Katiyar
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
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Sarode SA, Bhojane JM, Nagarkar JM. An efficient magnetic copper ferrite nanoparticle: for one pot synthesis of 2-substituted benzoxazole via redox reactions. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2014.11.065] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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28
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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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29
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Aksenov NA, Aksenov AV, Nadein ON, Aksenov DA, Smirnov AN, Rubin M. One-pot synthesis of benzoxazoles via the metal-free ortho-C–H functionalization of phenols with nitroalkanes. RSC Adv 2015. [DOI: 10.1039/c5ra15128g] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
PPA-activated nitroalkanes are employed in the design of a one-pot cascade transformation involvingortho-C–H functionalization, by Beckman rearrangement, and condensation to produce benzoxazoles and benzobisoxazoles directly from phenols.
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Affiliation(s)
- Nicolai A. Aksenov
- Department of Chemistry
- North Caucasus Federal University
- Stavropol 355009
- Russian Federation
| | - Alexander V. Aksenov
- Department of Chemistry
- North Caucasus Federal University
- Stavropol 355009
- Russian Federation
| | - Oleg N. Nadein
- Department of Chemistry
- North Caucasus Federal University
- Stavropol 355009
- Russian Federation
| | - Dmitrii A. Aksenov
- Department of Chemistry
- North Caucasus Federal University
- Stavropol 355009
- Russian Federation
| | - Alexander N. Smirnov
- Department of Chemistry
- North Caucasus Federal University
- Stavropol 355009
- Russian Federation
| | - Michael Rubin
- Department of Chemistry
- North Caucasus Federal University
- Stavropol 355009
- Russian Federation
- Department of Chemistry
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30
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Mayo MS, Yu X, Zhou X, Feng X, Yamamoto Y, Bao M. Synthesis of Benzoxazoles from 2-Aminophenols and β-Diketones Using a Combined Catalyst of Brønsted Acid and Copper Iodide. J Org Chem 2014; 79:6310-4. [DOI: 10.1021/jo500604x] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Muhammad Shareef Mayo
- State
Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China
| | - Xiaoqiang Yu
- State
Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China
| | - Xiaoyu Zhou
- State
Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China
| | - Xiujuan Feng
- State
Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China
| | - Yoshinori Yamamoto
- State
Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China
- WPI-AIMR (WPI-Advanced Institute for Materials Research), Tohoku University, Sendai 980-8577, Japan
| | - Ming Bao
- State
Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China
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31
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Yuan G, Zhu Z, Gao X, Jiang H. Electrochemically promoted synthesis of polysubstituted oxazoles from β-diketone derivatives and benzylamines under mild conditions. RSC Adv 2014. [DOI: 10.1039/c4ra03865g] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An efficient electrochemical route has been developed to synthesize polysubstituted oxazoles, without the use of hazardous oxidants and transition metal catalysts.
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Affiliation(s)
- Gaoqing Yuan
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou, China
| | - Zechen Zhu
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou, China
| | - Xiaofang Gao
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou, China
| | - Huanfeng Jiang
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou, China
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32
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Tang L, Guo X, Yang Y, Zha Z, Wang Z. Gold nanoparticles supported on titanium dioxide: an efficient catalyst for highly selective synthesis of benzoxazoles and benzimidazoles. Chem Commun (Camb) 2014; 50:6145-8. [DOI: 10.1039/c4cc01822b] [Citation(s) in RCA: 98] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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33
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Yang D, Zhu X, Wei W, Sun N, Yuan L, Jiang M, You J, Wang H. Magnetically recoverable and reusable CuFe2O4 nanoparticle-catalyzed synthesis of benzoxazoles, benzothiazoles and benzimidazoles using dioxygen as oxidant. RSC Adv 2014. [DOI: 10.1039/c4ra00559g] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A green and efficient strategy for the synthesis of benzoxazoles, benzothiazoles and benzimidazoles has been developed by using inexpensive, readily available, dioxygen-stable and recyclable CuFe2O4 as the nanocatalyst.
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Affiliation(s)
- Daoshan Yang
- Shandong Province Key Laboratory of Life-Organic Analysis
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165, P. R. China
| | - Xiao Zhu
- Shandong Province Key Laboratory of Life-Organic Analysis
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165, P. R. China
| | - Wei Wei
- Shandong Province Key Laboratory of Life-Organic Analysis
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165, P. R. China
| | - Nana Sun
- Shandong Province Key Laboratory of Life-Organic Analysis
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165, P. R. China
| | - Li Yuan
- Shandong Province Key Laboratory of Life-Organic Analysis
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165, P. R. China
| | - Min Jiang
- Beijing Key Laboratory for Analytical Methods and Instrumentation
- Department of Chemistry
- Tsinghua University
- Beijing 100084, P. R. China
| | - Jinmao You
- Shandong Province Key Laboratory of Life-Organic Analysis
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165, P. R. China
- Key Laboratory of Adaptation and Evolution of Plateau Biota
| | - Hua Wang
- Shandong Province Key Laboratory of Life-Organic Analysis
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165, P. R. China
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34
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Lee H, Kim BH. Indium-mediated one-pot pyrrole synthesis from nitrobenzenes and 1,4-diketones. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.05.113] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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35
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Cho YH, Lee CY, Cheon CH. Cyanide as a powerful catalyst for facile synthesis of benzofused heteroaromatic compounds via aerobic oxidation. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.05.138] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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36
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Fortenberry C, Nammalwar B, Bunce RA. Ammonium Chloride-catalyzed Synthesis of Benzo-fused Heterocycles fromo-Substituted Anilines and Orthoesters. ORG PREP PROCED INT 2013. [DOI: 10.1080/00304948.2013.743751] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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37
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Cho YH, Lee CY, Ha DC, Cheon CH. Cyanide as a Powerful Catalyst for Facile Preparation of 2-Substituted BenzoxazolesviaAerobic Oxidation. Adv Synth Catal 2012. [DOI: 10.1002/adsc.201200684] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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38
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Xu Z, Zhang C, Jiao N. Synthesis of Oxazoles through Copper-Mediated Aerobic Oxidative Dehydrogenative Annulation and Oxygenation of Aldehydes and Amines. Angew Chem Int Ed Engl 2012; 51:11367-70. [DOI: 10.1002/anie.201206382] [Citation(s) in RCA: 104] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2012] [Indexed: 02/06/2023]
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39
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Xu Z, Zhang C, Jiao N. Synthesis of Oxazoles through Copper-Mediated Aerobic Oxidative Dehydrogenative Annulation and Oxygenation of Aldehydes and Amines. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201206382] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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40
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Wu M, Hu X, Liu J, Liao Y, Deng GJ. Iron-Catalyzed 2-Arylbenzoxazole Formation from o-Nitrophenols and Benzylic Alcohols. Org Lett 2012; 14:2722-5. [DOI: 10.1021/ol300937z] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Mingyue Wu
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Xiong Hu
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Juan Liu
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Yunfeng Liao
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Guo-Jun Deng
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China
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41
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Chen S, Bai D, Shi F, Li J, Li C, Jia X. Iron‐Promoted Practical One‐Pot Synthesis of 2,5‐Disubstituted Oxazoles. CHINESE J CHEM 2012. [DOI: 10.1002/cjoc.201100683] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Songhui Chen
- Department of Chemistry, Shanghai University, Shanghai 200444, China
| | - Donghu Bai
- Department of Chemistry, Shanghai University, Shanghai 200444, China
| | - Feng Shi
- Department of Chemistry, Shanghai University, Shanghai 200444, China
| | - Jian Li
- Department of Chemistry, Shanghai University, Shanghai 200444, China
| | - Chunju Li
- Department of Chemistry, Shanghai University, Shanghai 200444, China
| | - Xueshun Jia
- Department of Chemistry, Shanghai University, Shanghai 200444, China
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu 730000, China
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42
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Wendlandt AE, Stahl SS. Copper(ii)-mediated oxidative cyclization of enamides to oxazoles. Org Biomol Chem 2012; 10:3866-70. [DOI: 10.1039/c2ob25310k] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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43
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Zhu X, Wei Y. An efficient synthesis of 2-substituted benzoxazoles using cerium(III) chloride/sodium iodide as catalyst. HETEROCYCL COMMUN 2012. [DOI: 10.1515/hc-2012-0054] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
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44
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45
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Kim J, Kim J, Lee H, Lee BM, Kim BH. Indium-mediated one-pot benzimidazole synthesis from 2-nitroanilines or 1,2-dinitroarenes with orthoesters. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.08.017] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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46
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Phenylboronic acid catalyzed-cyanide promoted, one-pot synthesis of 2-(2-hydroxyphenyl)benzoxazole derivatives. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.06.039] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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47
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Lee H, Kim M, Jun YM, Kim BH, Lee BM. N-(2-hydroxyaryl)benzamide synthesis from 2-nitroaryl benzoates via an indium-mediated reduction-migration reaction. HETEROATOM CHEMISTRY 2011. [DOI: 10.1002/hc.20669] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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48
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Reyes H, Beltran HI, Rivera-Becerril E. One pot synthesis of 2-phenylbenzoxazoles by potassium cyanide assisted reaction of o-aminophenols and benzaldehydes. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2010.11.038] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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49
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Hyo Kim B, Hee Han J, Choi J, Moo Jun Y, Min Lee B. One-Pot Aryl-1,4-thiomorpholine 1,1-Dioxide Synthesis via Double 1,4-Addition of in situ Reduced Nitroarenes to Divinyl Sulfones. HETEROCYCLES 2010. [DOI: 10.3987/com-09-11858] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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