1
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McArthur G, Abel S, Volpin G, Barber DM. Strategies for the Enantioselective Synthesis of 2‐Isoxazolines and 2‐Isoxazolin‐5‐ones Bearing Fully Substituted Stereocenters**. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Affiliation(s)
- Gillian McArthur
- Research and Development, Weed Control Chemistry, Bayer AG, Crop Science Division Industriepark Höchst 65926 Frankfurt am Main Germany
| | - Steven Abel
- Research and Development, Weed Control Chemistry, Bayer AG, Crop Science Division Industriepark Höchst 65926 Frankfurt am Main Germany
| | - Giulio Volpin
- Research and Development, Small Molecules Technologies, Process Research, Bayer AG, Crop Science Division Industriepark Höchst 65926 Frankfurt am Main Germany
| | - David M. Barber
- Research and Development, Weed Control Chemistry, Bayer AG, Crop Science Division Industriepark Höchst 65926 Frankfurt am Main Germany
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2
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Ma L, Jin F, Cheng X, Tao S, Jiang G, Li X, Yang J, Bao X, Wan X. [2 + 2 + 1] Cycloaddition of N-tosylhydrazones, tert-butyl nitrite and alkenes: a general and practical access to isoxazolines. Chem Sci 2021; 12:9823-9830. [PMID: 34349956 PMCID: PMC8293996 DOI: 10.1039/d1sc02352g] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Accepted: 06/19/2021] [Indexed: 12/11/2022] Open
Abstract
N-Tosylhydrazones have proven to be versatile synthons over the past several decades. However, to our knowledge, the construction of isoxazolines based on N-tosylhydrazones has not been examined. Herein, we report the first demonstrations of [2 + 2 + 1] cycloaddition reactions that allow the facile synthesis of isoxazolines, employing N-tosylhydrazones, tert-butyl nitrite (TBN) and alkenes as reactants. This process represents a new type of cycloaddition reaction with a distinct mechanism that does not involve the participation of nitrile oxides. This approach is both general and practical and exhibits a wide substrate scope, nearly universal functional group compatibility, tolerance of moisture and air, the potential for functionalization of complex bioactive molecules and is readily scaled up. Both control experiments and theoretical calculations indicate that this transformation proceeds via the in situ generation of a nitronate from the coupling of N-tosylhydrazone and TBN, followed by cycloaddition with an alkene and subsequent elimination of a tert-butyloxy group to give the desired isoxazoline.
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Affiliation(s)
- Liang Ma
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University Suzhou 215123 China
| | - Feng Jin
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University Suzhou 215123 China
| | - Xionglve Cheng
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University Suzhou 215123 China
| | - Suyan Tao
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University Suzhou 215123 China
| | - Gangzhong Jiang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University Suzhou 215123 China
| | - Xingxing Li
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University Suzhou 215123 China
| | - Jinwei Yang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University Suzhou 215123 China
| | - Xiaoguang Bao
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University Suzhou 215123 China
| | - Xiaobing Wan
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University Suzhou 215123 China
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3
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Feng Q, Huang H, Sun J. Ru-Catalyzed [3 + 2] Cycloaddition of Nitrile Oxides and Electron-Rich Alkynes with Reversed Regioselectivity. Org Lett 2021; 23:2431-2436. [PMID: 33750136 DOI: 10.1021/acs.orglett.1c00273] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Polarity reversal ("umpolung") of a functional group can override its inherent reactivity and lead to distinct bond-forming modes. Herein we describe a rarely studied cycloaddition between nitrile oxides and electron-rich alkynes with reversed regioselectivity, leading to the useful 4-heterosubstituted isoxazoles. The use of a ruthenium catalyst completely overrides the inherent polarity of nitrile oxides. This reversed regioselectivity was also observed for their reactions with a range of electron-deficient alkynes.
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Affiliation(s)
- Qiang Feng
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China.,Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Hai Huang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Jianwei Sun
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China.,Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
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4
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Mild synthesis of isoxazoline derivatives via an efficient [4 + 1] annulation reaction of transient nitrosoalkenes and sulfur ylides. Sci Rep 2021; 11:2078. [PMID: 33483530 PMCID: PMC7822858 DOI: 10.1038/s41598-021-81370-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 01/06/2021] [Indexed: 12/18/2022] Open
Abstract
An efficient [4 + 1] annulation between α-bromooximes and sulfur ylides via in situ generation of nitrosoalkenes under mild basic reaction conditions has been developed, providing an expeditious and scalable approach to synthesize biologically interesting isoxazoline derivatives with good to excellent yields.
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5
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Liao J, Ouyang L, Jin Q, Zhang J, Luo R. Recent advances in the oxime-participating synthesis of isoxazolines. Org Biomol Chem 2020; 18:4709-4716. [PMID: 32525196 DOI: 10.1039/d0ob00963f] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Isoxazoline compounds are used as important intermediates for the synthesis of organic molecules, which are widely used in the chemical and life science industries. Oxime-participating cyclization has emerged as an efficient strategy for the construction of isoxazolines. This review is devoted to highlighting the main achievements (since 2010) in the development of methodologies for the synthesis of isoxazolines. According to the reaction mechanism, the oxime-participating synthesis of isoxazolines can be mainly classified into four reaction types: iminoxyl radical-initiated intramolecular cyclization, intermolecular radical addition-initiated cyclization, intramolecular nucleophilic cyclization, and [3 + 2] cycloaddition. Meanwhile, miscellaneous examples are also illustrated, such as [2 + 2 + 1] cycloaddition. Representative reactions will be discussed for each of the highlighted synthetic strategies. In addition, the enantioselective synthesis of isoxazolines is also illustrated in this review.
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Affiliation(s)
- Jianhua Liao
- School of Pharmaceutical Sciences, Gannan Medical University, Ganzhou, 341000, Jiangxi Province, P. R. China. and School of Pharmacy, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Lu Ouyang
- School of Pharmaceutical Sciences, Gannan Medical University, Ganzhou, 341000, Jiangxi Province, P. R. China.
| | - Qi Jin
- School of Pharmaceutical Sciences, Gannan Medical University, Ganzhou, 341000, Jiangxi Province, P. R. China.
| | - Jian Zhang
- School of Pharmaceutical Sciences, Gannan Medical University, Ganzhou, 341000, Jiangxi Province, P. R. China.
| | - Renshi Luo
- School of Pharmaceutical Sciences, Gannan Medical University, Ganzhou, 341000, Jiangxi Province, P. R. China.
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6
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Wang CY, Teng F, Li Y, Li JH. [2 + 2 + 1] Heteroannulation of Alkenes with Enynyl Benziodoxolones and Silver Nitrite Involving C≡C bond Oxidative Cleavage: Entry to 3-Aryl-Δ 2-isoxazolines. Org Lett 2020; 22:4250-4254. [PMID: 32432890 DOI: 10.1021/acs.orglett.0c01285] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A copper-catalyzed [2 + 2 + 1] heteroannulation of alkenes with enynyl benziodoxolones and AgNO2 involving oxidative cleavage of the C≡C bond promoted by cooperative Zn(OTf)2, KOAc, and 4 Å MS for producing 3-aryl Δ2-isoxazolines is reported. Mechanistic studies indicate that AgNO2 serves as the N/O two-atom unit source, enabling the formation of three bonds through NO2 addition across the C≡C bond, NO-transfer, C≡C bond cleavage, and annulation cascades.
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Affiliation(s)
- Cheng-Yong Wang
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China.,Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province, Hengyang Normal University, Hengyang 421008, China
| | - Fan Teng
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
| | - Yang Li
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
| | - Jin-Heng Li
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China.,State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China.,Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province, Hengyang Normal University, Hengyang 421008, China
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7
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Pan Z, Mao K, Zhu G, Wang C, Zhang J, Rong L. Copper-Catalyzed Annulation Reaction of Alkenes and N-Alkyl(aryl)-1-(methylthio)-2-nitroethenamine: an Approach for the Synthesis of Isoxazole Derivatives. J Org Chem 2020; 85:3364-3373. [PMID: 32037815 DOI: 10.1021/acs.joc.9b03157] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A copper-catalyzed annulation reaction to access a variety of isoxazoles from alkenes and oxazete in situ generated from N-alkyl(aryl)-1-(methylthio)-2-nitroethenamine was reported. A plausible mechanism underlying the formation of the product was proposed, which represented a new approach for the construction of isoxazolines. This reaction was capable of tolerating alkenes bearing various substituents, which showed a relatively broad substrate scope with good functional group compatibility.
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Affiliation(s)
- Zhengbing Pan
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, 221116 Jiangsu, PR China
| | - Kaimin Mao
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, 221116 Jiangsu, PR China
| | - Guangzhou Zhu
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, 221116 Jiangsu, PR China
| | - Chang Wang
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, 221116 Jiangsu, PR China
| | - Jinpeng Zhang
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, 221116 Jiangsu, PR China.,Key Lab of Environment and Health, School of Public Health, Xuzhou Medical University, Xuzhou, 221006 Jiangsu, PR China
| | - Liangce Rong
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, 221116 Jiangsu, PR China
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8
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Yamamoto T, Togo H. Transformation of arenes into 3-arylpyrazoles and 3-arylisoxazolines with β-bromopropionyl chloride, hydrazine, and hydroxylamine. Tetrahedron 2020. [DOI: 10.1016/j.tet.2019.130920] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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9
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Yang S, Li H, Li P, Yang J, Wang L. Room temperature iron(ii)-catalyzed radical cyclization of unsaturated oximes with hypervalent iodine reagents. Org Biomol Chem 2020; 18:715-724. [DOI: 10.1039/c9ob02424g] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
An iron(ii)-catalyzed radical cyclization of oximes with hypervalent iodine reagents was developed, which enabled the construction of the isoxazoline backbone.
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Affiliation(s)
- Shichao Yang
- Department of Chemistry
- Huaibei Normal University
- Huaibei
- P.R. China
| | - Hongji Li
- Department of Chemistry
- Huaibei Normal University
- Huaibei
- P.R. China
| | - Pinhua Li
- Department of Chemistry
- Huaibei Normal University
- Huaibei
- P.R. China
| | - Jingya Yang
- Department of Chemistry
- Huaibei Normal University
- Huaibei
- P.R. China
| | - Lei Wang
- Department of Chemistry
- Huaibei Normal University
- Huaibei
- P.R. China
- State Key Laboratory of Organometallic Chemistry
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10
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Xiong M, Liang X, Gao Z, Lei A, Pan Y. Synthesis of Isoxazolines and Oxazines by Electrochemical Intermolecular [2 + 1 + n] Annulation: Diazo Compounds Act as Radical Acceptors. Org Lett 2019; 21:9300-9305. [PMID: 31713430 DOI: 10.1021/acs.orglett.9b03306] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Reported herein is an unprecedented synthesis of isoxazolines and oxazines through electrochemical intermolecular annulation of alkenes with tert-butyl nitrite, in which diazo compounds serve as radical acceptors. Notably, [2 + 1 + 2] and [2 + 1 + 3] annulations occur when styrenes and allylbenzenes are used as substrates, respectively. The latter reaction undergoes group migration to form more stable radical, manifesting radical route instead of conventional 1,3-dipolar cycloaddition occurs. Moreover, scale-up experiments suggest the potential application value of these transformations in industry.
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Affiliation(s)
- Mingteng Xiong
- Department of Chemistry , Zhejiang University , Hangzhou 310027 , Zhejiang , P. R. China
| | - Xiao Liang
- Department of Chemistry , Zhejiang University , Hangzhou 310027 , Zhejiang , P. R. China
| | - Zhan Gao
- Department of Chemistry , Zhejiang University , Hangzhou 310027 , Zhejiang , P. R. China
| | - Aiwen Lei
- The Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences , Wuhan University , Wuhan 430072 , P. R. China
| | - Yuanjiang Pan
- Department of Chemistry , Zhejiang University , Hangzhou 310027 , Zhejiang , P. R. China
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11
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Abstract
Background:
α-Aryl substituted nitroalkanes are important synthetic intermediates
for the preparation of pharmaceutical molecules, natural products, and functional
materials. Due to their scare existence in Nature, synthesis of these compounds has attracted
the attention of synthetic and medicinal chemists, rendering α-arylation of nitroalkanes
of an important research topic. This article summarizes the important advances of α-
arylation of nitroalkanes since 1963.
Results:
After a brief introduction of the synthetic application and the reactions of nitroalkanes,
this article reviewed the synthetic methods for the α-arylated aliphatic nitro compound.
The amount of research on α-arylation of nitroalkanes using various arylation reagents
and the discovery of elegant synthetic approaches towards such skeleton have been
discussed. This review described these advances in two sections. One is the arylation of non-activated nitroalkanes,
with an emphasis on the application of diverse arylation reagents; the other focuses on the arylation of
activated nitroalkanes, including dinitroalkanes, trinitroalkanes, α-nitrosulfones, α-nitroesters, α-nitrotoluenes,
and α-nitroketones. The synthetic application of these methods has also been presented in some cases.
Conclusion:
In this review, we described the progress of α-arylation of nitroalkanes. Although the immense
amount of research on α-arylation of aliphatic nitro compounds has been achieved, many potential issues still
need to be addressed, especially the asymmetric transformation and its wide application in organic synthesis.
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Affiliation(s)
- Peng-Fei Zheng
- Department of General Surgery, Lanzhou University Second Hospital, Lanzhou University, Lanzhou 730000, China
| | - Yang An
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Zuo-Yi Jiao
- Department of General Surgery, Lanzhou University Second Hospital, Lanzhou University, Lanzhou 730000, China
| | - Zhou-Bao Shi
- Affiliate Hospital of Gansu University of Chinese Medicine, Lanzhou 730000, China
| | - Fu-Min Zhang
- State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
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12
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He Y, Huang L, Xie L, Liu P, Wei Q, Mao F, Zhang X, Huang J, Chen S, Huang C. Palladium-Catalyzed C-H Bond Functionalization Reactions Using Phosphate/Sulfonate Hypervalent Iodine Reagents. J Org Chem 2019; 84:10088-10101. [PMID: 31329431 DOI: 10.1021/acs.joc.9b01278] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A new and operationally simple approach for palladium-catalyzed C-H functionalization reactions utilizing an organophosphorus/sulfonate hypervalent iodine reagent as both an oxidant and the source of a functional group has been developed. Through this method, the oxidative phosphorylation-, sulfonation-, and hydroxylation of unactivated benzyl C(sp3)-H bonds, along with the hydroxylation and arylation of aryl C(sp2)-H bonds, are successfully realized under mild conditions and with excellent site-selectivity. The versatile C-OSO2R bond provides a platform for a wide array of subsequent diversification reactions.
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Affiliation(s)
| | | | | | - Peng Liu
- Guangzhou Institutes of Biomedicine and Health , Chinese Academy of Sciences , 190 Kaiyuan Avenue , Guangzhou 510530 , P. R. China
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13
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Dai P, Tan X, Luo Q, Yu X, Zhang S, Liu F, Zhang WH. Synthesis of 3-Acyl-isoxazoles and Δ 2-Isoxazolines from Methyl Ketones, Alkynes or Alkenes, and tert-Butyl Nitrite via a Csp 3-H Radical Functionalization/Cycloaddition Cascade. Org Lett 2019; 21:5096-5100. [PMID: 31194561 DOI: 10.1021/acs.orglett.9b01683] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A novel metal-free tandem Csp3-H bond functionalization of ketones and 1,3-dipolar cycloaddition has been developed. An efficient approach to a variety of oxazole and isoxazoline derivatives is demonstrated using the 1,3-dipolar cycloaddition of alkynes and alkenes to nitrile oxides generated by reactions of methyl ketones with tert-butyl nitrite. This new protocol provides access to a variety of isoxazolines with diverse functionalities. An isoxazole generated in this way was found to have significant antifungal activity.
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Affiliation(s)
- Peng Dai
- Jiangsu Key Laboratory of Pesticide Science , College of Sciences, Nanjing Agricultural University , Nanjing 210095 , China
| | - Xin Tan
- Jiangsu Key Laboratory of Pesticide Science , College of Sciences, Nanjing Agricultural University , Nanjing 210095 , China
| | - Qian Luo
- Jiangsu Key Laboratory of Pesticide Science , College of Sciences, Nanjing Agricultural University , Nanjing 210095 , China
| | - Xiang Yu
- Jiangsu Key Laboratory of Pesticide Science , College of Sciences, Nanjing Agricultural University , Nanjing 210095 , China
| | - Shuguang Zhang
- Jiangsu Key Laboratory of Pesticide Science , College of Sciences, Nanjing Agricultural University , Nanjing 210095 , China
| | - Fang Liu
- Jiangsu Key Laboratory of Pesticide Science , College of Sciences, Nanjing Agricultural University , Nanjing 210095 , China
| | - Wei-Hua Zhang
- Jiangsu Key Laboratory of Pesticide Science , College of Sciences, Nanjing Agricultural University , Nanjing 210095 , China
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14
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Ye C, Kou X, Yang G, Shen J, Zhang W. PhI(OAc)2-mediated alkoxyoxygenation of β,γ-unsaturated ketoximes: Preparation of isoxazolines bearing two contiguous tetrasubstituted carbons. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.03.046] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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15
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Hu L, Yuan J, Fu J, Zhang T, Gao L, Xiao Y, Mao P, Qu L. Copper-Catalyzed Direct C-3 Benzylation of Quinoxalin-2(1H
)-ones with Methylarenes under Microwave Irradiation. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800697] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Leqian Hu
- School of Chemistry and Chemical Engineering; Academician Workstation for Natural Medicinal Chemistry of Henan Province; Henan University of Technology;; 450001 Zhengzhou P. R. China
| | - Jinwei Yuan
- School of Chemistry and Chemical Engineering; Academician Workstation for Natural Medicinal Chemistry of Henan Province; Henan University of Technology;; 450001 Zhengzhou P. R. China
| | - Junhao Fu
- School of Chemistry and Chemical Engineering; Academician Workstation for Natural Medicinal Chemistry of Henan Province; Henan University of Technology;; 450001 Zhengzhou P. R. China
| | - Taotao Zhang
- School of Chemistry and Chemical Engineering; Academician Workstation for Natural Medicinal Chemistry of Henan Province; Henan University of Technology;; 450001 Zhengzhou P. R. China
| | - Lele Gao
- School of Chemistry and Chemical Engineering; Academician Workstation for Natural Medicinal Chemistry of Henan Province; Henan University of Technology;; 450001 Zhengzhou P. R. China
| | - Yongmei Xiao
- School of Chemistry and Chemical Engineering; Academician Workstation for Natural Medicinal Chemistry of Henan Province; Henan University of Technology;; 450001 Zhengzhou P. R. China
| | - Pu Mao
- School of Chemistry and Chemical Engineering; Academician Workstation for Natural Medicinal Chemistry of Henan Province; Henan University of Technology;; 450001 Zhengzhou P. R. China
| | - Lingbo Qu
- School of Chemistry and Chemical Engineering; Academician Workstation for Natural Medicinal Chemistry of Henan Province; Henan University of Technology;; 450001 Zhengzhou P. R. China
- College of Chemistry and Molecular Engineering; Zhengzhou University; 450001 Zhengzhou PR China
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16
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Lee HJ, Eun B, Sung E, Hwang GT, Ko YK, Cho CW. Catalytic enantioselective synthesis of carboxy-substituted 2-isoxazolines by cascade oxa-Michael-cyclization. Org Biomol Chem 2018; 16:657-664. [PMID: 29303197 DOI: 10.1039/c7ob02722b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
An efficient quinidine-based phase-transfer-catalyzed enantioselective cascade oxa-Michael-cyclization reaction of hydroxylamine with various β-carboxy-substituted α,β-unsaturated ketones has been achieved for the preparation of chiral carboxy-substituted 2-isoxazolines. This cascade reaction provided the desired products in good yields (up to 98%) with excellent enantioselectivities (91-96% ee). In addition, the cascade reaction was effectively applied to the first catalytic asymmetric synthesis of the herbicide (S)-methiozolin.
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Affiliation(s)
- Hyo-Jun Lee
- Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University, Daegu 41566, Republic of Korea.
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17
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Korgavkar NN, Samant SD. 1,3-Dipolar cycloaddition reaction of aryl nitrile oxides with alkenes using imidazole and pyridine containing reusable polymeric base catalysts. SYNTHETIC COMMUN 2018. [DOI: 10.1080/00397911.2017.1399207] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Nilesh N. Korgavkar
- Department of Chemistry, Institute of Chemical Technology, Matunga, Mumbai, India
| | - Shriniwas D. Samant
- Department of Chemistry, Institute of Chemical Technology, Matunga, Mumbai, India
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18
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Mahesh D, Satheesh V, Kumar SV, Punniyamurthy T. Copper(II)-Catalyzed Oxidative Coupling of Anilines, Methyl Arenes, and TMSN3 via C(sp3/sp2)–H Functionalization and C–N Bond Formation. Org Lett 2017; 19:6554-6557. [DOI: 10.1021/acs.orglett.7b03264] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Devulapally Mahesh
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Vanaparthi Satheesh
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Sundaravel Vivek Kumar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
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19
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Lee GA, Lin HC, Lee HY, Chen CH, Huang HY. Ipso
Nitration of 2-Halothiophenes with Silver Nitrate. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700392] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Gon-Ann Lee
- Department of Chemistry; Fu Jen Catholic University, Xinzhuang; New Taipei 24205, R.O.C. Taiwan
| | - Hung-Chun Lin
- Department of Chemistry; Fu Jen Catholic University, Xinzhuang; New Taipei 24205, R.O.C. Taiwan
| | - Hsin-Yi Lee
- Department of Chemistry; Fu Jen Catholic University, Xinzhuang; New Taipei 24205, R.O.C. Taiwan
| | - Chien-Hsun Chen
- Department of Chemistry; Fu Jen Catholic University, Xinzhuang; New Taipei 24205, R.O.C. Taiwan
| | - Hsiang-Yun Huang
- Department of Chemistry; Fu Jen Catholic University, Xinzhuang; New Taipei 24205, R.O.C. Taiwan
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20
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Chen R, Zhao Y, Fang S, Long W, Sun H, Wan X. Coupling Reaction of Cu-Based Carbene and Nitroso Radical: A Tandem Reaction To Construct Isoxazolines. Org Lett 2017; 19:5896-5899. [DOI: 10.1021/acs.orglett.7b02885] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Rongxiang Chen
- Key Laboratory of Organic
Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Yanwei Zhao
- Key Laboratory of Organic
Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Shangwen Fang
- Key Laboratory of Organic
Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Wenhao Long
- Key Laboratory of Organic
Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Hongmei Sun
- Key Laboratory of Organic
Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Xiaobing Wan
- Key Laboratory of Organic
Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, P. R. China
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21
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Chan CK, Tsai YL, Chang MY. Construction of Nitrated Benzo[3.3.1]bicyclic Acetal/Ketal Core via Nitration of o-Carbonyl Allylbenzenes. Org Lett 2017; 19:1358-1361. [PMID: 28257215 DOI: 10.1021/acs.orglett.7b00245] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Intramolecular annulation of o-carbonyl allylbenzenes was achieved to construct novel nitrated [6,6,6]tricycles having an acetal or ketal motif in good yields. The expeditious one-step nitration route provides 4 or 5 new bond formations, including 2 or 3 C-N bonds and 2 C-O bonds. The structural framework of benzobicycle [3.3.1] is confirmed by X-ray crystallographic analysis. A plausible mechanism is proposed.
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Affiliation(s)
- Chieh-Kai Chan
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University Hospital, Kaohsiung Medical University , Kaohsiung 807, Taiwan
| | - Yu-Lin Tsai
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University Hospital, Kaohsiung Medical University , Kaohsiung 807, Taiwan
| | - Meng-Yang Chang
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University Hospital, Kaohsiung Medical University , Kaohsiung 807, Taiwan
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22
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Reddy KR, Kannaboina P, Das P. Palladium-Catalyzed Chemoselective Switch: Synthesis of a New Class of Indenochromenes and Pyrano[2,3-c
]carbazoles. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201600530] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- K. Ranjith Reddy
- Medicinal Chemistry Division; CSIR-Indian Institute of Integrative Medicine; Canal Road Jammu- 180001 India
- Academy of Scientific and Innovative Research (AcSIR); New Delhi- 110025 India
| | - Prakash Kannaboina
- Medicinal Chemistry Division; CSIR-Indian Institute of Integrative Medicine; Canal Road Jammu- 180001 India
- Academy of Scientific and Innovative Research (AcSIR); New Delhi- 110025 India
| | - Parthasarathi Das
- Medicinal Chemistry Division; CSIR-Indian Institute of Integrative Medicine; Canal Road Jammu- 180001 India
- Academy of Scientific and Innovative Research (AcSIR); New Delhi- 110025 India
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23
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Zhang W, Su Y, Wang KH, Wu L, Chang B, Shi Y, Huang D, Hu Y. Trichloroisocyanuric Acid Promoted Cascade Cyclization/Trifluoromethylation of Allylic Oximes: Synthesis of Trifluoromethylated Isoxazolines. Org Lett 2017; 19:376-379. [DOI: 10.1021/acs.orglett.6b03582] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Weigang Zhang
- College
of Chemistry and Chemical Engineering, Northwest Normal University, 967 Anning East Road, Lanzhou 730070, P. R. China
| | - Yingpeng Su
- College
of Chemistry and Chemical Engineering, Northwest Normal University, 967 Anning East Road, Lanzhou 730070, P. R. China
| | - Ke-Hu Wang
- College
of Chemistry and Chemical Engineering, Northwest Normal University, 967 Anning East Road, Lanzhou 730070, P. R. China
| | - Lili Wu
- College
of Chemistry and Chemical Engineering, Northwest Normal University, 967 Anning East Road, Lanzhou 730070, P. R. China
| | - Bingbing Chang
- College
of Chemistry and Chemical Engineering, Northwest Normal University, 967 Anning East Road, Lanzhou 730070, P. R. China
| | - Ya Shi
- College
of Chemistry and Chemical Engineering, Northwest Normal University, 967 Anning East Road, Lanzhou 730070, P. R. China
| | - Danfeng Huang
- College
of Chemistry and Chemical Engineering, Northwest Normal University, 967 Anning East Road, Lanzhou 730070, P. R. China
| | - Yulai Hu
- College
of Chemistry and Chemical Engineering, Northwest Normal University, 967 Anning East Road, Lanzhou 730070, P. R. China
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
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24
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Liu Z, Zhang X, Li J, Li F, Li C, Jia X, Li J. Exploiting the Reactivity of Isocyanide: Coupling Reaction between Isocyanide and Toluene Derivatives Using the Isocyano Group as an N1 Synthon. Org Lett 2016; 18:4052-5. [DOI: 10.1021/acs.orglett.6b01928] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Zhiqiang Liu
- Department
of Chemistry, Innovative Drug Research Center, Shanghai University, 99 Shangda Road, Shanghai 200444, P. R. China
| | - Xinglu Zhang
- Department
of Chemistry, Innovative Drug Research Center, Shanghai University, 99 Shangda Road, Shanghai 200444, P. R. China
| | - Jianxiong Li
- Department
of Chemistry, Innovative Drug Research Center, Shanghai University, 99 Shangda Road, Shanghai 200444, P. R. China
| | - Feng Li
- Department
of Chemistry, Innovative Drug Research Center, Shanghai University, 99 Shangda Road, Shanghai 200444, P. R. China
| | - Chunju Li
- Department
of Chemistry, Innovative Drug Research Center, Shanghai University, 99 Shangda Road, Shanghai 200444, P. R. China
| | - Xueshun Jia
- Department
of Chemistry, Innovative Drug Research Center, Shanghai University, 99 Shangda Road, Shanghai 200444, P. R. China
| | - Jian Li
- Department
of Chemistry, Innovative Drug Research Center, Shanghai University, 99 Shangda Road, Shanghai 200444, P. R. China
- Shanghai
Key Laboratory of High Temperature Superconductors, Shanghai University, Shanghai 200444, P. R. China
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25
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Li C, Jin T, Zhang X, Li C, Jia X, Li J. Bu4NI-Catalyzed α-Oxyacylation of Carbonyl Compounds with Toluene Derivatives. Org Lett 2016; 18:1916-9. [DOI: 10.1021/acs.orglett.6b00749] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Chengliang Li
- Department
of Chemistry, Innovative Drug Research Center, Shanghai University, 99 Shangda Road, Shanghai 200444, P. R. China
- College
of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, P. R. China
| | - Tao Jin
- Department
of Chemistry, Innovative Drug Research Center, Shanghai University, 99 Shangda Road, Shanghai 200444, P. R. China
| | - Xinglu Zhang
- Department
of Chemistry, Innovative Drug Research Center, Shanghai University, 99 Shangda Road, Shanghai 200444, P. R. China
| | - Chunju Li
- Department
of Chemistry, Innovative Drug Research Center, Shanghai University, 99 Shangda Road, Shanghai 200444, P. R. China
| | - Xueshun Jia
- Department
of Chemistry, Innovative Drug Research Center, Shanghai University, 99 Shangda Road, Shanghai 200444, P. R. China
- College
of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, P. R. China
| | - Jian Li
- Department
of Chemistry, Innovative Drug Research Center, Shanghai University, 99 Shangda Road, Shanghai 200444, P. R. China
- Shanghai
Key Laboratory of High Temperature Superconductors, Shanghai University, Shanghai, 200444, P. R. China
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26
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Jiang H, Jie H, Li J. Scandium triflate-catalyzed selective ring opening and rearrangement reaction of spiro-epoxyoxindole and carbonyl compounds. RSC Adv 2016. [DOI: 10.1039/c6ra21264f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Scandium triflate-catalyzed reactions between spiro-epoxyoxindole and carbonyl compounds have been disclosed. Furthermore, an unprecedented rearrangement takes place to yield alkylidene oxindoles when aromatic aldehydes are used as carbonyl components.
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Affiliation(s)
- Hui Jiang
- State Key Laboratory of Electronic Thin Films and Integrated Devices
- University of Electronic Science and Technology of China
- Chengdu 610054
- P. R. China
- Department of Applied Chemistry
| | - Haohua Jie
- Department of Chemistry
- Innovative Drug Research Center
- Shanghai University
- Shanghai 200444
- P. R. China
| | - Jian Li
- Department of Chemistry
- Innovative Drug Research Center
- Shanghai University
- Shanghai 200444
- P. R. China
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27
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Wan L, Qiao K, Sun XN, Di ZC, Fang Z, Li ZJ, Guo K. Benzylation of heterocyclic N-oxides via direct oxidative cross-dehydrogenative coupling with toluene derivatives. NEW J CHEM 2016. [DOI: 10.1039/c6nj02560a] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel cross-dehydrogenative coupling (CDC) of heterocyclic N-oxides with toluene derivatives has been disclosed.
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Affiliation(s)
- L. Wan
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- 30 Puzhu South Road
- Nanjing
- P. R. China
| | - K. Qiao
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- 30 Puzhu South Road
- Nanjing
- P. R. China
| | - X. N. Sun
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- 30 Puzhu South Road
- Nanjing
- P. R. China
| | - Z. C. Di
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- 30 Puzhu South Road
- Nanjing
- P. R. China
| | - Z. Fang
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- 30 Puzhu South Road
- Nanjing
- P. R. China
| | - Z. J. Li
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- 30 Puzhu South Road
- Nanjing
- P. R. China
| | - K. Guo
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- 30 Puzhu South Road
- Nanjing
- P. R. China
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