1
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Preetham H, Sharath Kumar KS, Kandaswamy A, Rangappa S, Gatasheh MK, Muddegowda U, Rangappa KS. Alternative Approach to Access 5-Hydroxy-1H-pyrrol-2-(5H)-ones from Base-Induced Tandem Intramolecular Cyclization of Sulfur Ylide with Ketones and 1,3-Hydroxy Rearrangement. ACS OMEGA 2023; 8:48251-48257. [PMID: 38144059 PMCID: PMC10734039 DOI: 10.1021/acsomega.3c06866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 11/20/2023] [Accepted: 11/21/2023] [Indexed: 12/26/2023]
Abstract
An easily adaptable protocol for the preparation of 5-hydroxy-1H-pyrrol-2(5H)-ones from readily available starting materials has been reported. The reaction of sulfur ylides with carbonyl compounds is a common approach to synthesizing epoxides. Alternatively, we have developed a method with mild reaction conditions wherein sulfur ylide underwent an intramolecular cyclization with a ketonic carbonyl group in a highly efficient way and was followed by 1,3-hydroxy rearrangement to produce 5-hydroxy-1H-pyrrol-2(5H)-ones in excellent yields. The present method offers a straightforward approach to synthesize 5-hydroxy-1H-pyrrol-2(5H)-ones from sulfur ylides without the aid of transition metal in one-pot operation, which involves sequential cyclization and rearrangement reaction. The formation of 5-hydroxy-1H-pyrrol-2(5H)-ones is supported by different spectroscopic techniques, including X-ray crystallographic data and 2D NMR studies (COSY, HSQC, HMBC, and DEPT).
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Affiliation(s)
| | | | - Aravind Kandaswamy
- Graduate
School of Life Science, Hokkaido University, Kita 21, Nishi 11, Sapporo 001-0021, Japan
| | - Shobith Rangappa
- Adichunchanagiri
Institute for Molecular Medicine, Adichunchanagiri
University, B. G. Nagar, Bellur 571448 ,India
| | - Mansour K. Gatasheh
- Department
of Biochemistry, College of Science, King
Saud University, P.O.Box 2455, Riyadh 11451, Saudi Arabia
| | - Umashankara Muddegowda
- Department
of Studies and Research in Chemistry, Karnataka
State Open University, Mukthagangotri, Mysuru 570006, India
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2
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Li M, He Z, Zhao W, Yu Y, Huang F, Baell JB. Photocatalytic Benzylic C-H Oxidation/Cyclization of Enaminones to the Synthesis of Polysubstituted Oxazoles. J Org Chem 2023. [PMID: 37262016 DOI: 10.1021/acs.joc.3c00269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Photocatalytic benzylic C-H oxidation/cyclization of enaminones was efficiently achieved to afford oxazole derivatives under mild conditions. The oxygen in the oxazole ring originated from green oxidant molecular oxygen. The synthetic protocol features broad substrate scopes and good functional group tolerance. The combined experimental and theoretical studies reveal that in suit benzylic C-H oxidation/cyclization is involved in the reaction transformations.
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Affiliation(s)
- Mingrui Li
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Zhiqin He
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, P. R. China
| | - Wei Zhao
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, P. R. China
| | - Yang Yu
- School of Environmental Science and Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Fei Huang
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Jonathan B Baell
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 211816, P. R. China
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3
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Zhang X, Wang H, Li Z, Shu Y, Gan S, Zhang X, Shao H, Wang C. Chemodivergent Synthesis of Aza-Heterocycles with a Quarternary Carbon Center via [4 + 1] Annulation between Azoalkenes and α-Bromo Carbonyl Compounds. ACS OMEGA 2022; 7:40963-40972. [PMID: 36406503 PMCID: PMC9670695 DOI: 10.1021/acsomega.2c04127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Accepted: 10/12/2022] [Indexed: 06/16/2023]
Abstract
An efficient [4 + 1] annulation reaction between in situ generated azoalkene intermediates and α-bromocarbonyls has been established. A series of skeletally diverse aza-heterocycles with a functionalized quaternary center were obtained in up to 89% yield under mild conditions.
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Affiliation(s)
- Xiaoke Zhang
- Central
Laboratory, Chongqing University FuLing
Hospital, Chongqing 408000, P.R. China
- Zunyi
Medical University, Zunyi, Guizhou 563000, P.R. China
| | - Haibo Wang
- Zhejiang
Hongyuan Pharmaceutical Co., Ltd., Chem & APIs, Industrial Zone, Linhai, Taizhou 310001, Zhejiang, P.R. China
| | - Ziwei Li
- Central
Laboratory, Chongqing University FuLing
Hospital, Chongqing 408000, P.R. China
| | - Yan Shu
- Central
Laboratory, Chongqing University FuLing
Hospital, Chongqing 408000, P.R. China
| | - Song Gan
- Zunyi
Medical University, Zunyi, Guizhou 563000, P.R. China
| | - Xuefang Zhang
- Zunyi
Medical University, Zunyi, Guizhou 563000, P.R. China
| | - Huawu Shao
- Natural
Products Research Centre, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 100045, P.R. China
| | - Chaoyong Wang
- Central
Laboratory, Chongqing University FuLing
Hospital, Chongqing 408000, P.R. China
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4
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Wu X, Zhao XJ, Zhang L, Li G, He Y. Electrooxidative dehydrogenative coupling of 1,4-naphthoquinones with amines: Facile access to 2-amino-1,4-naphthoquinones. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.154208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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5
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Zhu YP, Zhou Y, Li WJ, Liu FR, Wang WC, Hao KY, Chao BY, Shi TR, Wu AX, Sun YY. Iodine-Promoted Oxidative Cyclization of Methyl Azaarenes and α-Amino Ketones for One-Pot Synthesis of 2-Azaaryl-5-aryl Oxazoles. J Org Chem 2022; 87:12460-12469. [PMID: 36067376 DOI: 10.1021/acs.joc.2c01399] [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
A high efficiency protocol was developed for the synthesis of 2,5-disubstituted oxazoles via iodine-promoted oxidative domino cyclization. These reactions were performed with readily available methyl azaarenes and α-amino ketones under metal-free conditions. This protocol is a simple method with high functional group compatibility, a wide range of substrates, and excellent yield, providing a new way to synthesize azaarene-attached oxazoles.
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Affiliation(s)
- Yan-Ping Zhu
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong Yantai, 264005, P. R. China
| | - Yu Zhou
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong Yantai, 264005, P. R. China
| | - Wen-Juan Li
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong Yantai, 264005, P. R. China
| | - Fu-Rao Liu
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong Yantai, 264005, P. R. China
| | - Wen-Cheng Wang
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong Yantai, 264005, P. R. China
| | - Kai-Yan Hao
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong Yantai, 264005, P. R. China
| | - Bing-Yu Chao
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong Yantai, 264005, P. R. China
| | - Tian-Ru Shi
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong Yantai, 264005, P. R. China
| | - An-Xin Wu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Hubei Wuhan, 430079, P. R. China
| | - Yuan-Yuan Sun
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong Yantai, 264005, P. R. China
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6
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Shinde S, Inamdar S, Shinde M, Kushwaha N, Obakachi V, Girase P, Kushwaha B, Dhawan S, Kumar V, Karpoormath R. Recent advances and approaches in the metal-free synthesis of 1,3-oxazole derivatives. SYNTHETIC COMMUN 2022. [DOI: 10.1080/00397911.2022.2107432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Affiliation(s)
- Suraj Shinde
- Department of Pharmaceutical Chemistry, Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal (Westville), Durban, South Africa
| | - Shaukatali Inamdar
- Department of Pharmaceutical Chemistry, Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal (Westville), Durban, South Africa
| | - Mahadev Shinde
- Department of Pharmaceutical Chemistry, Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal (Westville), Durban, South Africa
| | - Narvadeshwar Kushwaha
- Department of Pharmaceutical Chemistry, Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal (Westville), Durban, South Africa
| | - Vincent Obakachi
- Department of Pharmaceutical Chemistry, Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal (Westville), Durban, South Africa
| | - Pankaj Girase
- Department of Pharmaceutical Chemistry, Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal (Westville), Durban, South Africa
| | - Babita Kushwaha
- Department of Pharmaceutical Chemistry, Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal (Westville), Durban, South Africa
| | - Sanjeev Dhawan
- Department of Pharmaceutical Chemistry, Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal (Westville), Durban, South Africa
| | - Vishal Kumar
- Department of Pharmaceutical Chemistry, Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal (Westville), Durban, South Africa
| | - Rajshekhar Karpoormath
- Department of Pharmaceutical Chemistry, Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal (Westville), Durban, South Africa
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7
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Newar UD, Borra S, Maurya RA. Visible-Light 2,4-Dinitrophenol-Mediated Photoannulation of α-Azidochalcones into 2,5-Diaryloxazoles. Org Lett 2022; 24:4454-4458. [PMID: 35700202 DOI: 10.1021/acs.orglett.2c01691] [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
A novel and efficient visible-light 2,4-dinitrophenol (2,4-DNP) mediated photoannulation of α-azidochalcones into 2,5-diaryloxazoles was developed. The carbon-carbon double bond of α-azidochalcone was cleaved, leading to the formation of new C-O and C-N bonds in the photoannulation. Control experiments were carried out, and a plausible mechanism of the photoannulation was proposed. The scope of the reaction was studied by synthesizing a series of 2,5-diaryloxazoles including two naturally occurring oxazoles (Texamine and Balsoxin) in excellent yields.
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Affiliation(s)
- Uma Devi Newar
- Applied Organic Chemistry Group, Chemical Sciences & Technology Division, CSIR-North East Institute of Science & Technology (NEIST), Jorhat 785006, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Satheesh Borra
- Applied Organic Chemistry Group, Chemical Sciences & Technology Division, CSIR-North East Institute of Science & Technology (NEIST), Jorhat 785006, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Ram Awatar Maurya
- Applied Organic Chemistry Group, Chemical Sciences & Technology Division, CSIR-North East Institute of Science & Technology (NEIST), Jorhat 785006, India
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8
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Zeng D, Zhang L, Wang W, Li G, Zhao XJ, He Y. Electrochemical Synthesis of Azaborininones under Metal‐Catalyst‐Free Mild Conditions. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Dongwen Zeng
- Yunnan Minzu University School of Ethnic Medicine CHINA
| | - Lizhu Zhang
- Yunnan Minzu University School of Ethnic Medicine CHINA
| | - Wei Wang
- Yunnan Minzu University School of Ethnic Medicine CHINA
| | - Ganpeng Li
- Yunnan Minzu University School of Ethnic Medicine CHINA
| | | | - Yonghui He
- Yunnan Minzu University School of Ethnic Medicine 2929 Yuehua Street 650500 Kunming CHINA
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9
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Wang Y, Zhao X, Wu X, Zhang L, Li G, He Y. Electrochemical Synthesis of Trisubstituted Oxazoles and Imines from β‐Diketones and Amines. ChemElectroChem 2022. [DOI: 10.1002/celc.202200378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yangli Wang
- Key Laboratory of Chemistry in Ethnic Medicinal Resources State Ethnic Affairs Commission & Ministry of Education Key Laboratory of Natural Products Synthetic Biology of Ethnic Medicinal Endophytes State Ethnic Affairs Commission School of Ethnic Medicine Yunnan Minzu University Kunming 650500 China
| | - Xiao‐Jing Zhao
- Key Laboratory of Chemistry in Ethnic Medicinal Resources State Ethnic Affairs Commission & Ministry of Education Key Laboratory of Natural Products Synthetic Biology of Ethnic Medicinal Endophytes State Ethnic Affairs Commission School of Ethnic Medicine Yunnan Minzu University Kunming 650500 China
| | - Xi Wu
- Key Laboratory of Chemistry in Ethnic Medicinal Resources State Ethnic Affairs Commission & Ministry of Education Key Laboratory of Natural Products Synthetic Biology of Ethnic Medicinal Endophytes State Ethnic Affairs Commission School of Ethnic Medicine Yunnan Minzu University Kunming 650500 China
| | - Lizhu Zhang
- Key Laboratory of Chemistry in Ethnic Medicinal Resources State Ethnic Affairs Commission & Ministry of Education Key Laboratory of Natural Products Synthetic Biology of Ethnic Medicinal Endophytes State Ethnic Affairs Commission School of Ethnic Medicine Yunnan Minzu University Kunming 650500 China
| | - Ganpeng Li
- Key Laboratory of Chemistry in Ethnic Medicinal Resources State Ethnic Affairs Commission & Ministry of Education Key Laboratory of Natural Products Synthetic Biology of Ethnic Medicinal Endophytes State Ethnic Affairs Commission School of Ethnic Medicine Yunnan Minzu University Kunming 650500 China
| | - Yonghui He
- Key Laboratory of Chemistry in Ethnic Medicinal Resources State Ethnic Affairs Commission & Ministry of Education Key Laboratory of Natural Products Synthetic Biology of Ethnic Medicinal Endophytes State Ethnic Affairs Commission School of Ethnic Medicine Yunnan Minzu University Kunming 650500 China
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10
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Kadu VD. Recent Advances for Synthesis of Oxazole Heterocycles
via
C‐H/C‐N Bond Functionalization of Benzylamines. ChemistrySelect 2022. [DOI: 10.1002/slct.202104028] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Vikas D. Kadu
- School of Chemical Sciences Punyashlok Ahilyadevi Holkar Solapur University Solapur 413255 Maharashtra India
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11
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Bosveli A, Montagnon T, Kalaitzakis D, Vassilikogiannakis G. Eosin: a versatile organic dye whose synthetic uses keep expanding. Org Biomol Chem 2021; 19:3303-3317. [PMID: 33899893 DOI: 10.1039/d1ob00301a] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Organic dyes, which absorb light in the visible region of the electromagnetic spectrum, offer a lower cost, greener alternative to precious metals in photocatalysis. In this context, the organic dye eosin's uses are currently expanding at a significant rate. For a long time, its action as an energy transfer agent dominated, more recently, however, there has been a growing interest in its potential as an electron transfer agent. In this short review, we highlight some recent (from 2016 onwards) contributions to the field with a focus on the breadth of the reactions eosin can catalyse.
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Affiliation(s)
- Artemis Bosveli
- Department of Chemistry, University of Crete, Vasilika Vouton, 71003 Iraklion, Crete, Greece.
| | - Tamsyn Montagnon
- Department of Chemistry, University of Crete, Vasilika Vouton, 71003 Iraklion, Crete, Greece.
| | - Dimitris Kalaitzakis
- Department of Chemistry, University of Crete, Vasilika Vouton, 71003 Iraklion, Crete, Greece.
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12
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Basson AJ, McLaughlin MG. Sustainable Access to 5-Amino-Oxazoles and Thiazoles via Calcium-Catalyzed Elimination-Cyclization with Isocyanides. CHEMSUSCHEM 2021; 14:1696-1699. [PMID: 33605021 PMCID: PMC8048476 DOI: 10.1002/cssc.202100225] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 02/18/2021] [Indexed: 06/12/2023]
Abstract
Herein, we report a sustainable, modular, rapid and high-yielding transformation to afford densely functionalized 5-aminooxazoles and thiazoles. The reaction is tolerant to a wide range of functional groups and is typically complete in under 30 min. Furthermore, the described transformation is inherently green in relation to the catalyst and solvent choice as well as producing environmentally benign alcoholic by-products.
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Affiliation(s)
- Ashley J. Basson
- Department of Natural SciencesManchester Metropolitan UniversityChester StreetManchesterM1 5GDUnited Kingdom
| | - Mark G. McLaughlin
- Department of Natural SciencesManchester Metropolitan UniversityChester StreetManchesterM1 5GDUnited Kingdom
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13
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14
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Liang F, Liu K, Zhao C, Shang Z, Kong H, Yin Y, Zhu Y, Sun Y, Yao J. Convergent Domino Cyclization: Oxidative [3+1+1] Annulation for One‐Pot Synthesis of 2‐Quinoline‐4,5‐diaryl‐oxazoles from Methyl Azaarenes, Benzoins and NH
4
OAc. European J Org Chem 2021. [DOI: 10.1002/ejoc.202001561] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Fei‐Fei Liang
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University Shandong, Yantai 264005 P. R. China
| | - Kai‐Xuan Liu
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University Shandong, Yantai 264005 P. R. China
| | - Cong Zhao
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University Shandong, Yantai 264005 P. R. China
| | - Zhi‐Hao Shang
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University Shandong, Yantai 264005 P. R. China
| | - Hong‐Mei Kong
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University Shandong, Yantai 264005 P. R. China
| | - Ya‐Qing Yin
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University Shandong, Yantai 264005 P. R. China
| | - Yan‐Ping Zhu
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University Shandong, Yantai 264005 P. R. China
| | - Yuan‐Yuan Sun
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University Shandong, Yantai 264005 P. R. China
| | - Jian‐Wen Yao
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University Shandong, Yantai 264005 P. R. China
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15
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Zhao MN, Ning GW, Yang DS, Fan MJ, Zhang S, Gao P, Zhao LF. Iron-Catalyzed Cycloaddition of Amides and 2,3-Diaryl-2 H-azirines To Access Oxazoles via C-N Bond Cleavage. J Org Chem 2021; 86:2957-2964. [PMID: 33443426 DOI: 10.1021/acs.joc.0c02843] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A novel and efficient iron-catalyzed cycloaddition reaction using readily available 2,3-diaryl-2H-azirines and primary amides is reported. A wide range of trisubstituted oxazoles could be achieved in good yields with good functional group compatibility. In this transformation, two C-N bonds were cleaed and new C-N and C-O bonds were formed.
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Affiliation(s)
- Mi-Na Zhao
- Shaanxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, P. R. China
| | - Gui-Wan Ning
- Shaanxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, P. R. China
| | - De-Suo Yang
- Shaanxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, P. R. China
| | - Ming-Jin Fan
- Shaanxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, P. R. China
| | - Sheng Zhang
- Shaanxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, P. R. China
| | - Peng Gao
- Shaanxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, P. R. China
| | - Li-Fang Zhao
- Shaanxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, P. R. China
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16
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Chen Y, Xia L, Chang Y, Ma W, Wang B. Application of N-Alkyl Amines as Versatile Building Blocks in Oxidative Coupling Reactions. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202009034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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17
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Mukku N, Madivalappa Davanagere P, Chanda K, Maiti B. A Facile Microwave-Assisted Synthesis of Oxazoles and Diastereoselective Oxazolines Using Aryl-Aldehydes, p-Toluenesulfonylmethyl Isocyanide under Controlled Basic Conditions. ACS OMEGA 2020; 5:28239-28248. [PMID: 33163807 PMCID: PMC7643254 DOI: 10.1021/acsomega.0c04130] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Accepted: 10/06/2020] [Indexed: 06/11/2023]
Abstract
In this study, a highly efficient two-component [3 + 2] cycloaddition reaction of substituted aryl aldehydes with 4-toluenesulfonylmethyl isocyanide (TosMIC) in the presence of 2 equiv of potassium phosphate as a base to 5-substituted oxazoles were established in a isopropanol medium under microwave irradiation. However, using 1 equiv of K3PO4 as a base resulted in the diastereoselective synthesis of 4,5-disubstituted oxazolines under identical reaction conditions. The foremost benefits of these protocols are the moderate-to-excellent yields with good functional group compatibility, simple experimental procedure, inexpensive readily available starting materials, nonchromatographic purification, and high bond-forming efficiency. The synthetic manipulation reported herein represents a cleaner route to the sustainable preparation of 5-substituted oxazoles and diastereoselective 4,5-disubstituted oxazolines derivatives.
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Affiliation(s)
- Narasimharao Mukku
- Department of Chemistry,
School of Advanced Sciences, Vellore Institute
of Technology, Vellore 632014, India
| | | | - Kaushik Chanda
- Department of Chemistry,
School of Advanced Sciences, Vellore Institute
of Technology, Vellore 632014, India
| | - Barnali Maiti
- Department of Chemistry,
School of Advanced Sciences, Vellore Institute
of Technology, Vellore 632014, India
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18
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Saito A, Togo H. Photochemical Transformation of O
-(β-Arylethyl) Arylimidates into 2,4-Diaryl-5-iodoxazoles with 1,3-Diiodo-5,5-dimethylhydantoin. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000383] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Aya Saito
- Graduate School of Science; Chiba University; Yayoi-cho 1-33 263-8522 Chiba Inage-ku Japan
| | - Hideo Togo
- Graduate School of Science; Chiba University; Yayoi-cho 1-33 263-8522 Chiba Inage-ku Japan
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Natarajan P, Kumar N, Priya. Eosin Y‐Catalyzed Visible‐Light‐Mediated Synthesis of 2‐Mercaptobenzothiazoles from 2‐Azidoarenediazonium Tetrafluoroborates and Carbon Disulfide. ChemistrySelect 2020. [DOI: 10.1002/slct.202000767] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Palani Natarajan
- Department of Chemistry & Centre for Advanced Studies in ChemistryPanjab University Chandigarh 160 014 India E-mail
| | - Naveen Kumar
- Department of Chemistry & Centre for Advanced Studies in ChemistryPanjab University Chandigarh 160 014 India E-mail
| | - Priya
- Department of Chemistry & Centre for Advanced Studies in ChemistryPanjab University Chandigarh 160 014 India E-mail
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