1
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Saito A. Hypervalent Iodine-mediated/Catalyzed Oxidative Cycloisomerization/Annulation of Alkynes for Metal-free Synthesis of Oxazoles. CURR ORG CHEM 2020. [DOI: 10.2174/1385272824999200510232438] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Since oxazoles have found widespread applications not only as synthetic intermediates
but also as biologically active compounds, much effort has been focused on developing
novel and efficient methods for the synthesis of this heterocycle. From the viewpoint
of green and sustainable chemistry, hypervalent iodine and other halogen reagents
have gained increasing popularity in metal-free oxidative transformation due to their low
toxicity, transition-metal-like reactivity, high stability, easy handling and other benefits. In
this account, our two approaches to the metal-free synthesis of oxazoles by means of a peculiar
activation of alkynes by iodine species are described with the related contexts. One
is iodine(III)-mediated/catalyzed oxidative cycloisomerization reactions of N-propargyl
amides for the preparation of oxazoles bearing various functional groups at their side
chains. In these reactions, iodine(III) species works as a donor of various heteroatomic functional groups as
well as an activator of carbon-carbon triple bonds in a single step. Furthermore, this methodology can be extended
to iodine(III)-mediated/catalyzed oxidative annulation of alkynes and nitriles as another approach, in
which heteroatoms on iodine(III) species are incorporated in the azole rings.
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Affiliation(s)
- Akio Saito
- Division of Applied Chemistry, Institute of Engineering, Tokyo University of Agriculture and Technology, Tokyo, Japan
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2
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Synthesis of new alkoxy/alkylthiovinylated oxazoles using tosylmethyl isocyanide. MENDELEEV COMMUNICATIONS 2020. [DOI: 10.1016/j.mencom.2020.05.030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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3
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Lyubchuk TV, Hordiyenko OV. The use of N-halosuccinimides for cyclization with the formation of five-membered heterocyclic compounds. Chem Heterocycl Compd (N Y) 2020. [DOI: 10.1007/s10593-020-02616-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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4
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Shaikh A, Ravi O, Pushpa Ragini S, Sadhana N, Reddy Bathula S. Benzimidazoles and benzothiazoles from styrenes and N-vinylimidazole via palladium catalysed oxidative C C and C N bond cleavage. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2019.151356] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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5
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Serebryannikova AV, Galenko EE, Novikov MS, Khlebnikov AF. Synthesis of Isoxazole- and Oxazole-4-carboxylic Acids Derivatives by Controlled Isoxazole-Azirine-Isoxazole/Oxazole Isomerization. J Org Chem 2019; 84:15567-15577. [PMID: 31658810 DOI: 10.1021/acs.joc.9b02536] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The first synthesis of isoxazole-4-carboxylic acid derivatives by domino isoxazole-isoxazole isomerization is reported. Fe(II)-catalyzed isomerization of 4-acyl-5-methoxy-/5-aminoisoxazoles (dioxane, 105 °C) leads to the formation of isoxazole-4-carboxylic esters and amides in good yields. 4-Formyl-5-methoxyisoxazoles give methyl oxazole-4-carboxylates under the same reaction conditions. Fe(II)-catalyzed isomerization of 4-acyl-5-methoxyisoxazoles under milder conditions (MeCN, 50 °C) allows the preparation of transient 2-acyl-2-(methoxycarbonyl)-2H-azirines. The azirines isomerize quantitatively either into isoxazoles under catalytic conditions (dioxane, 105 °C) or into oxazoles under noncatalytic thermolysis (o-dichlorobenzene, 170 °C). The mechanism of the isomerization and dependence of the reaction routes on substituents at starting isoxazole core and reaction conditions are discussed on the basis of DFT calculations.
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Affiliation(s)
- Anna V Serebryannikova
- Institute of Chemistry , Saint Petersburg State University , 7/9 Universitetskaya nab. , St. Petersburg 199034 , Russia
| | - Ekaterina E Galenko
- Institute of Chemistry , Saint Petersburg State University , 7/9 Universitetskaya nab. , St. Petersburg 199034 , Russia
| | - Mikhail S Novikov
- Institute of Chemistry , Saint Petersburg State University , 7/9 Universitetskaya nab. , St. Petersburg 199034 , Russia
| | - Alexander F Khlebnikov
- Institute of Chemistry , Saint Petersburg State University , 7/9 Universitetskaya nab. , St. Petersburg 199034 , Russia
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6
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Cao Z, Lv H, Liu Y, Nie Z, Liu H, Yang T, Luo W, Liu Q, Guo C. Dimethyl Sulfoxide Oxygen Donor‐Based Annulation of Ketones and Ammonium Persulfate: Regioselective Synthesis of 2,4‐disubstituted Oxazoles. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201801671] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Zhongzhong Cao
- College of Chemistry and Chemical Engineering, Advanced Catalytic Engineering Research Center of the Ministry of EducationHunan University Changsha 410082 People's Republic of China
| | - Huifang Lv
- College of Chemistry and Chemical Engineering, Advanced Catalytic Engineering Research Center of the Ministry of EducationHunan University Changsha 410082 People's Republic of China
| | - Yufeng Liu
- College of Chemistry and Chemical Engineering, Advanced Catalytic Engineering Research Center of the Ministry of EducationHunan University Changsha 410082 People's Republic of China
| | - Zhiwen Nie
- College of Chemistry and Chemical Engineering, Advanced Catalytic Engineering Research Center of the Ministry of EducationHunan University Changsha 410082 People's Republic of China
| | - Haiping Liu
- College of Chemistry and Chemical Engineering, Advanced Catalytic Engineering Research Center of the Ministry of EducationHunan University Changsha 410082 People's Republic of China
| | - Tonglin Yang
- College of Chemistry and Chemical Engineering, Advanced Catalytic Engineering Research Center of the Ministry of EducationHunan University Changsha 410082 People's Republic of China
| | - Weiping Luo
- College of Chemistry and Chemical Engineering, Advanced Catalytic Engineering Research Center of the Ministry of EducationHunan University Changsha 410082 People's Republic of China
| | - Qiang Liu
- College of Chemistry and Chemical Engineering, Advanced Catalytic Engineering Research Center of the Ministry of EducationHunan University Changsha 410082 People's Republic of China
| | - Cancheng Guo
- College of Chemistry and Chemical Engineering, Advanced Catalytic Engineering Research Center of the Ministry of EducationHunan University Changsha 410082 People's Republic of China
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7
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An H, Mai S, Xuan Q, Zhou Y, Song Q. Gold-Catalyzed Radical-Involved Intramolecular Cyclization of Internal N-Propargylamides for the Construction of 5-Oxazole Ketones. J Org Chem 2018; 84:401-408. [DOI: 10.1021/acs.joc.8b02334] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Hejun An
- Institute of Next Generation Matter Transformation, College of Chemical Engineering, College of Material Sciences Engineering at Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian 361021, People’s Republic of China
| | - Shaoyu Mai
- Institute of Next Generation Matter Transformation, College of Chemical Engineering, College of Material Sciences Engineering at Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian 361021, People’s Republic of China
| | - Qingqing Xuan
- Institute of Next Generation Matter Transformation, College of Chemical Engineering, College of Material Sciences Engineering at Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian 361021, People’s Republic of China
| | - Yao Zhou
- Institute of Next Generation Matter Transformation, College of Chemical Engineering, College of Material Sciences Engineering at Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian 361021, People’s Republic of China
| | - Qiuling Song
- Institute of Next Generation Matter Transformation, College of Chemical Engineering, College of Material Sciences Engineering at Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian 361021, People’s Republic of China
- Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, People’s Republic of China
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8
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NBS-mediated practical cyclization of N-acyl amidines to 1,2,4-oxadiazoles via oxidative N‒O bond formation. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.07.036] [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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9
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Kumar SV, Acharya A, Ila H. Synthesis of 2,4,5-Trisubstituted Oxazoles with Complementary Regioselectivity from α-Oxoketene Dithioacetals and β-(Methylthio)-β-(het)aryl-2-propenones. J Org Chem 2018; 83:6607-6622. [DOI: 10.1021/acs.joc.8b00900] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Siripuram Vijay Kumar
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research(JNCASR), Jakkur, Bangalore 560064, India
| | - Anand Acharya
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research(JNCASR), Jakkur, Bangalore 560064, India
| | - Hiriyakkanavar Ila
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research(JNCASR), Jakkur, Bangalore 560064, India
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10
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Jain T, Muktapuram PR, Pochampalli S, Sharma K, Pant G, Mitra K, Bathula SR, Banerjee D. Chain-length-specific anti-Candida activity of cationic lipo-oxazoles: a new class of quaternary ammonium compounds. J Med Microbiol 2017; 66:1706-1714. [DOI: 10.1099/jmm.0.000610] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Affiliation(s)
- Tushar Jain
- Molecular and Structural Biology Division, CSIR-Central Drug Research Institute, Lucknow-226 031, U.P., India
- Academy of Scientific & Innovative Research, Chennai-600113, India
| | - Pratap Reddy Muktapuram
- Division of Natural Products Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad -500007, India
| | - Satyanarayana Pochampalli
- Academy of Scientific & Innovative Research, Chennai-600113, India
- Division of Natural Products Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad -500007, India
| | - Komal Sharma
- Division of Natural Products Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad -500007, India
| | - Garima Pant
- Electron Microscopy Unit, Sophisticated and Analytical Instruments Facility, CSIR-Central Drug Research Institute, Lucknow-226 031, U.P., India
| | - Kalyan Mitra
- Electron Microscopy Unit, Sophisticated and Analytical Instruments Facility, CSIR-Central Drug Research Institute, Lucknow-226 031, U.P., India
| | - Surendar Reddy Bathula
- Division of Natural Products Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad -500007, India
- Academy of Scientific & Innovative Research, Chennai-600113, India
| | - Dibyendu Banerjee
- Academy of Scientific & Innovative Research, Chennai-600113, India
- Molecular and Structural Biology Division, CSIR-Central Drug Research Institute, Lucknow-226 031, U.P., India
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11
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Ichake SS, Rajawinslin RR, Kavala V, Villuri BK, Yang HT, Kuo CW, Yao CF. N-Bromosuccinimide-Mediated Thiocyanation of Cyclohexene-Fused IsoxazolineN-Oxides. ASIAN J ORG CHEM 2016. [DOI: 10.1002/ajoc.201500453] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Sachin S. Ichake
- Department of Chemistry; National Taiwan Normal University; 88, Sec. 4, Tingchow Road Taipei- 116, Taiwan R.O.C
| | - R. R. Rajawinslin
- Department of Chemistry; National Taiwan Normal University; 88, Sec. 4, Tingchow Road Taipei- 116, Taiwan R.O.C
| | - Veerababurao Kavala
- Department of Chemistry; National Taiwan Normal University; 88, Sec. 4, Tingchow Road Taipei- 116, Taiwan R.O.C
| | - Bharath Kumar Villuri
- Department of Chemistry; National Taiwan Normal University; 88, Sec. 4, Tingchow Road Taipei- 116, Taiwan R.O.C
| | - Huei-Ting Yang
- Department of Chemistry; National Taiwan Normal University; 88, Sec. 4, Tingchow Road Taipei- 116, Taiwan R.O.C
| | - Chun-Wei Kuo
- Department of Chemistry; National Taiwan Normal University; 88, Sec. 4, Tingchow Road Taipei- 116, Taiwan R.O.C
| | - Ching-Fa Yao
- Department of Chemistry; National Taiwan Normal University; 88, Sec. 4, Tingchow Road Taipei- 116, Taiwan R.O.C
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12
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Ibrar A, Khan I, Abbas N, Farooq U, Khan A. Transition-metal-free synthesis of oxazoles: valuable structural fragments in drug discovery. RSC Adv 2016. [DOI: 10.1039/c6ra19324b] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
This review article encapsulates the recent developments in the metal-free approaches used to construct oxazole moiety.
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Affiliation(s)
- Aliya Ibrar
- Department of Chemistry
- COMSATS Institute of Information Technology
- Abbottabad-22060
- Pakistan
| | - Imtiaz Khan
- Department of Chemistry
- Quaid-i-Azam University
- Islamabad-45320
- Pakistan
| | - Naeem Abbas
- Department of Chemistry
- Quaid-i-Azam University
- Islamabad-45320
- Pakistan
| | - Umar Farooq
- Department of Chemistry
- COMSATS Institute of Information Technology
- Abbottabad-22060
- Pakistan
| | - Ajmal Khan
- Department of Chemistry
- COMSATS Institute of Information Technology
- Abbottabad-22060
- Pakistan
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13
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Querard P, Girard SA, Uhlig N, Li CJ. Gold-catalyzed tandem reactions of amide-aldehyde-alkyne coupling and cyclization-synthesis of 2,4,5-trisubstituted oxazoles. Chem Sci 2015; 6:7332-7335. [PMID: 29861964 PMCID: PMC5950834 DOI: 10.1039/c5sc02933c] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2015] [Accepted: 10/05/2015] [Indexed: 12/13/2022] Open
Abstract
We report the first cationic gold(i)-catalyzed one-pot reaction of amide, alkyne and aldehyde followed by cyclization, to successfully access highly substituted oxazoles derivatives in good yields. A single catalyst allows the occurring of this multi-step reaction atom- and step-economically, with water as the only theoretical side product.
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Affiliation(s)
- Pierre Querard
- Department of Chemistry , FQRNT Center for Green Chemistry and Catalysis , McGill University , 801 Sherbrooke Street West , Montreal , Quebec H3A 0B8 , Canada .
| | - Simon A Girard
- Department of Chemistry , FQRNT Center for Green Chemistry and Catalysis , McGill University , 801 Sherbrooke Street West , Montreal , Quebec H3A 0B8 , Canada .
| | - Nick Uhlig
- Department of Chemistry , FQRNT Center for Green Chemistry and Catalysis , McGill University , 801 Sherbrooke Street West , Montreal , Quebec H3A 0B8 , Canada .
| | - Chao-Jun Li
- Department of Chemistry , FQRNT Center for Green Chemistry and Catalysis , McGill University , 801 Sherbrooke Street West , Montreal , Quebec H3A 0B8 , Canada .
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14
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Samanta S, Donthiri RR, Dinda M, Adimurthy S. Iodine catalysed intramolecular C(sp3)–H functionalization: synthesis of 2,5-disubstituted oxazoles from N-arylethylamides. RSC Adv 2015. [DOI: 10.1039/c5ra13441b] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Iodine catalyzed synthesis of 2,5-substituted oxazoles from N-arylethylamides through intramolecular C(sp3)–H functionalization under metal-free conditions is described.
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Affiliation(s)
- Supravat Samanta
- Academy of Scientific & Innovative Research
- Process Development & Engineering Cell
- CSIR–Central Salt & Marine Chemicals Research Institute
- Bhavnagar-364 002
- India
| | - Ramachandra Reddy Donthiri
- Academy of Scientific & Innovative Research
- Process Development & Engineering Cell
- CSIR–Central Salt & Marine Chemicals Research Institute
- Bhavnagar-364 002
- India
| | - Milan Dinda
- Academy of Scientific & Innovative Research
- Process Development & Engineering Cell
- CSIR–Central Salt & Marine Chemicals Research Institute
- Bhavnagar-364 002
- India
| | - Subbarayappa Adimurthy
- Academy of Scientific & Innovative Research
- Process Development & Engineering Cell
- CSIR–Central Salt & Marine Chemicals Research Institute
- Bhavnagar-364 002
- India
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15
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Chen C, Chen W, Bao Q. Convenient Route to Trisubstituted Oxazoles via a Copper-Catalysed Tandem Oxidative Cyclisation by Oxygen Oxidation. JOURNAL OF CHEMICAL RESEARCH 2015. [DOI: 10.3184/174751915x14192609116136] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A novel copper-catalysed oxidative cyclisation has been developed for the synthesis of trisubstituted oxazoles, which is thought to proceed through cascade formation of C-N and C-O bonds by oxygen oxidation. The desired products can be obtained from readily available starting materials while avoiding hazardous materials. Therefore, a green synthetic method for the preparation of oxazoles has been found.
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Affiliation(s)
- Chengqun Chen
- Department of Chemical Engineering, Fuzhou University Zhicheng College, Fuzhou 350002, P.R. China
| | - Wenfu Chen
- Department of Chemical Engineering, Fuzhou University Zhicheng College, Fuzhou 350002, P.R. China
| | - Qianhong Bao
- Department of Chemical Engineering, Fuzhou University Zhicheng College, Fuzhou 350002, P.R. China
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16
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Liu L, Du L, Zhang-Negrerie D, Du Y. NIS-mediated intramolecular oxidative α-functionalization of tertiary amines: transition metal-free synthesis of 1,2-dihydro-(4H)-3,1-benzoxazin-4-one derivatives. RSC Adv 2015. [DOI: 10.1039/c5ra03882k] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
A novel method for direct α-functionalization of tertiary amines via NIS-mediated oxidative C–O bond formation, where NIS serves as both an oxidant and an iodination reagent, has been developed.
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Affiliation(s)
- Le Liu
- School of Pharmaceutical Science and Technology
- Tianjin University
- Tianjin 300072
- China
| | - Liang Du
- School of Pharmaceutical Science and Technology
- Tianjin University
- Tianjin 300072
- China
| | - Daisy Zhang-Negrerie
- School of Pharmaceutical Science and Technology
- Tianjin University
- Tianjin 300072
- China
| | - Yunfei Du
- School of Pharmaceutical Science and Technology
- Tianjin University
- Tianjin 300072
- China
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17
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Abstract
2,5- and 2,4,5-substituted oxazoles were prepared in one-pot by the NBS/Me2S-mediated cyclization of enamides in the presence of base.
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Affiliation(s)
- Niranjan Panda
- Department of Chemistry
- National Institute of Technology
- Rourkela-769008, India
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18
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Liu B, Zhang Y, Huang G, Zhang X, Niu P, Wu J, Yu W, Chang J. A concise approach to polysubstituted oxazoles from N-acyl-2-bromo enamides via a copper(i)/amino acid-catalyzed intramolecular C–O bond formation. Org Biomol Chem 2014; 12:3912-23. [DOI: 10.1039/c4ob00309h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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