1
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Wang J, Huang H, Gao H, Qin G, Xiao T, Jiang Y. DBU/AgOTf Relay‐Catalysis Enabled One‐Pot Synthesis of 1,3‐Dihydroisobenzofurans and Its Conversion to Indanones. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jiazhuang Wang
- Faculty of Science Kunming University of Science and Technology Kunming 650500 People's Republic of China
| | - Hongtai Huang
- Faculty of Science Kunming University of Science and Technology Kunming 650500 People's Republic of China
| | - Haotian Gao
- Faculty of Science Kunming University of Science and Technology Kunming 650500 People's Republic of China
| | - Guiping Qin
- Faculty of Science Kunming University of Science and Technology Kunming 650500 People's Republic of China
| | - Tiebo Xiao
- Faculty of Science Kunming University of Science and Technology Kunming 650500 People's Republic of China
| | - Yubo Jiang
- Faculty of Science Kunming University of Science and Technology Kunming 650500 People's Republic of China
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2
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Nanda SK, Mallik R. Transition Metal-Catalyzed Hydroalkoxylation of Alkynes: An Overview. Chemistry 2021; 27:15571-15604. [PMID: 34343374 DOI: 10.1002/chem.202102194] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Indexed: 01/12/2023]
Abstract
Oxygen-bearing motifs, mainly the congener heterocycles are ubiquitous due to their presence in various natural products and bioactive scaffolds. Although in literature, several strategies have been developed for their synthesis, hydroalkoxylation of alkynes has come forward as a method of choice and has been used extensively. In particular, hydroalkoxylation of alkynes has gained enormous attention from the synthetic community due to the rapid access to a very useful and reactive synthetic intermediate like 'enol ether'. Furthermore, to manifold the utility of these methods, reports have been developed elaborating the generation of 'enol ether' using hydroalkoxylation and their usage in various reactions in cascade or tandem manner. This review focuses on recent development on the hydroalkoxylation of alkynes for the synthesis of oxygen-containing entities.
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Affiliation(s)
- Santosh K Nanda
- Department of Chemistry, School of Applied Science, Centurion University of Technology and Management Paralakhemundi, Odisha, 761211, India
| | - Rosy Mallik
- Department of Chemistry, School of Applied Science, Centurion University of Technology and Management Paralakhemundi, Odisha, 761211, India
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3
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Sreenivasulu C, Satyanarayana G. Time and Temperature Dependent Palladium-Catalyzed Stereo- and Regioselective Alkoxy-arylation of Triple Bonds: Synthesis of ( E)/( Z)-1,1-Disubstituted-3-(1-Phenylalkylidene)-1,3-dihydroisobenzofurans. J Org Chem 2021; 86:8182-8196. [PMID: 34097385 DOI: 10.1021/acs.joc.1c00666] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The development of synthetic strategies enabling the stereo- and regio-selective synthesis of organic molecules is indispensable in the pharmaceutical industry. This work describes a stereo- and regioselective synthesis of (E)/(Z)-1,1-disubstituted-3-(1-arylalkylidene)-1,3-dihydroisobenzofurans catalyzed by palladium. The DHIBFs are achieved from readily available aryl bromides and ortho-alkyne tertiary alcohols via intermolecular aryl Heck coupling and intramolecular oxo-cyclization of the suitably situated hydroxyl group. Significantly, it was demonstrated that a Z-isomer was formed as a substantial isomer at 80 °C for 6 h, whereas the stable E-isomer was the predominant one at slightly vigorous conditions (100 °C for 12 h). In addition, careful observation has also led to the realization that this double isomerization from Z- to E-isomer was triggered in the NMR tube itself in CDCl3 at room temperature. Significantly, this protocol, for the first time, enabled the synthesis of heavily substituted dihydroisobenzofurans, especially, bearing a tetra-substituted double bond.
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Affiliation(s)
| | - Gedu Satyanarayana
- Department of Chemistry, Indian Institute of Technology, Hyderabad, Kandi - 502 285, Sangareddy, Telangana, India
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4
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Cao Z, Zhao C, Zhu J, Yan S, Tian L, Sun X, Meng X. Gold‐Catalyzed Reaction of 2
H
‐Tetrazoles with Alkynes: Efficient Route to N‐Alkenylated Tetrazoles. ChemistrySelect 2019. [DOI: 10.1002/slct.201902532] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Ziping Cao
- School of Chemistry and Chemical EngineeringQufu Normal University Qufu 273165, Shandong P. R. China
- Shandong Key Laboratory of Life-Organic AnalysisKey Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine Qufu 273165, Shandong P. R. China
| | - Changyin Zhao
- School of Chemistry and Chemical EngineeringQufu Normal University Qufu 273165, Shandong P. R. China
| | - Jiekun Zhu
- School of Chemistry and Chemical EngineeringQufu Normal University Qufu 273165, Shandong P. R. China
| | - Shikun Yan
- School of Chemistry and Chemical EngineeringQufu Normal University Qufu 273165, Shandong P. R. China
| | - Laijin Tian
- School of Chemistry and Chemical EngineeringQufu Normal University Qufu 273165, Shandong P. R. China
- Shandong Key Laboratory of Life-Organic AnalysisKey Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine Qufu 273165, Shandong P. R. China
| | - Xuejun Sun
- School of Chemistry and Chemical EngineeringQufu Normal University Qufu 273165, Shandong P. R. China
| | - Xin Meng
- School of Chemistry and Chemical EngineeringQufu Normal University Qufu 273165, Shandong P. R. China
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5
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Marín-Luna M, Nieto Faza O, Silva López C. Gold-Catalyzed Homogeneous (Cyclo)Isomerization Reactions. Front Chem 2019; 7:296. [PMID: 31139614 PMCID: PMC6527766 DOI: 10.3389/fchem.2019.00296] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Accepted: 04/11/2019] [Indexed: 01/09/2023] Open
Abstract
Gold is currently one of the most used metals in organometallic catalysis. The ability of gold to activate unsaturated groups in different modes, together with its tolerance to a wide range of functional groups and reaction conditions, turns gold-based complexes into efficient and highly sought after catalysts. Natural products and relevant compounds with biological and pharmaceutical activity are often characterized by complex molecular structures. (Cyclo)isomerization reactions are often a useful strategy for the generation of this molecular complexity from synthetically accessible reactants. In this review, we collect the most recent contributions in which gold(I)- and/or gold(III)-catalysts mediate intramolecular (cyclo)isomerization transformations of unsaturated species, which commonly feature allene or alkyne motifs, and organize them depending on the substrate and the reaction type.
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Affiliation(s)
- Marta Marín-Luna
- Departamento de Química Orgánica, Universidade de Vigo, Vigo, Spain
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6
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Meng X, Guo M, Zhu J, Zhu H, Sun X, Tian L, Cao Z. Gold and TfOH-Cocatalyzed Tandem Reaction ofortho-Akynylarylaldehydes with Cyclopropenes: an Efficient Route to Functionalized Benzo[7]annulene Derivatives. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900118] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Xin Meng
- School of Chemistry and Chemical Engineering; Qufu Normal University; 273165 Qufu Shandong P. R. China
| | - Minghui Guo
- School of Chemistry and Chemical Engineering; Qufu Normal University; 273165 Qufu Shandong P. R. China
| | - Jiekun Zhu
- School of Chemistry and Chemical Engineering; Qufu Normal University; 273165 Qufu Shandong P. R. China
| | - Hongbo Zhu
- School of Chemistry and Chemical Engineering; Qufu Normal University; 273165 Qufu Shandong P. R. China
| | - Xuejun Sun
- School of Chemistry and Chemical Engineering; Qufu Normal University; 273165 Qufu Shandong P. R. China
| | - Laijin Tian
- School of Chemistry and Chemical Engineering; Qufu Normal University; 273165 Qufu Shandong P. R. China
- Shandong Key Laboratory of Life-Organic Analysis; Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine; 273165 Qufu Shandong P. R. China
| | - Ziping Cao
- School of Chemistry and Chemical Engineering; Qufu Normal University; 273165 Qufu Shandong P. R. China
- Shandong Key Laboratory of Life-Organic Analysis; Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine; 273165 Qufu Shandong P. R. China
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7
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Zhu H, Meng X, Zhang Y, Chen G, Cao Z, Sun X, You J. Chemoselective α-Methylenation of Aromatic Ketones Using the NaAuCl 4/Selectfluor/DMSO System. J Org Chem 2017; 82:12059-12065. [PMID: 29076735 DOI: 10.1021/acs.joc.7b01790] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Gold-catalyzed chemoselective α-methylenation of aromatic ketones was developed through the use of Selectfluor as a methylenating agent. A variety of useful 1,2-disubstituted propenone derivatives can be prepared in good yields via the present protocol. This reaction features a simple operation, good functional group tolerance, and broad scope of substrates.
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Affiliation(s)
- Hongbo Zhu
- School of Chemistry and Chemical Engineering, Qufu Normal University , Qufu, Shandong 273165, China
| | - Xin Meng
- School of Chemistry and Chemical Engineering, Qufu Normal University , Qufu, Shandong 273165, China
| | - Yanhui Zhang
- School of Chemistry and Chemical Engineering, Qufu Normal University , Qufu, Shandong 273165, China
| | - Guang Chen
- School of Chemistry and Chemical Engineering, Qufu Normal University , Qufu, Shandong 273165, China.,Shandong Key Laboratory of Life-Organic Analysis, Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine , Qufu, Shandong 273165, China
| | - Ziping Cao
- School of Chemistry and Chemical Engineering, Qufu Normal University , Qufu, Shandong 273165, China.,Shandong Key Laboratory of Life-Organic Analysis, Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine , Qufu, Shandong 273165, China
| | - Xuejun Sun
- School of Chemistry and Chemical Engineering, Qufu Normal University , Qufu, Shandong 273165, China.,Shandong Key Laboratory of Life-Organic Analysis, Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine , Qufu, Shandong 273165, China
| | - Jinmao You
- School of Chemistry and Chemical Engineering, Qufu Normal University , Qufu, Shandong 273165, China.,Shandong Key Laboratory of Life-Organic Analysis, Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine , Qufu, Shandong 273165, China
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8
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Albano G, Aronica LA. Potentiality and Synthesis of O- and N-Heterocycles: Pd-Catalyzed Cyclocarbonylative Sonogashira Coupling as a Valuable Route to Phthalans, Isochromans, and Isoindolines. European J Org Chem 2017. [DOI: 10.1002/ejoc.201701041] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Gianluigi Albano
- Dipartimento di Chimica e Chimica Industriale; University of Pisa; Via G. Moruzzi 13 56124 Pisa Italy
| | - Laura Antonella Aronica
- Dipartimento di Chimica e Chimica Industriale; University of Pisa; Via G. Moruzzi 13 56124 Pisa Italy
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9
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Zhu H, Cao Z, Meng X, Tian L, Chen G, Sun X, You J. Acid-mediated domino reaction of ortho -carbonylated alkynyl-substituted arylaldehydes with phenols: Rapid access to fused indeno[2,1- c ]chromen-7-one derivatives. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.04.041] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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10
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Meng X, Zhu H, Chen G, Tian L, Sun X, Cao Z, You J. Domino Reaction of ortho
-Carbonylated Alkyne-Substituted Arylaldehydes with Arylsulfinic Acids: Efficient Access to Sulfonyl-Functionalized Indanones. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700210] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Xin Meng
- School of Chemistry and Chemical Engineering; Qufu Normal University; Shandong Key Laboratory of Life-Organic Analysis; Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine; Qufu 273165 Shandong P. R. China
| | - Hongbo Zhu
- School of Chemistry and Chemical Engineering; Qufu Normal University; Shandong Key Laboratory of Life-Organic Analysis; Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine; Qufu 273165 Shandong P. R. China
| | - Guang Chen
- School of Chemistry and Chemical Engineering; Qufu Normal University; Shandong Key Laboratory of Life-Organic Analysis; Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine; Qufu 273165 Shandong P. R. China
| | - Laijin Tian
- School of Chemistry and Chemical Engineering; Qufu Normal University; Shandong Key Laboratory of Life-Organic Analysis; Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine; Qufu 273165 Shandong P. R. China
| | - Xuejun Sun
- School of Chemistry and Chemical Engineering; Qufu Normal University; Shandong Key Laboratory of Life-Organic Analysis; Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine; Qufu 273165 Shandong P. R. China
| | - Ziping Cao
- School of Chemistry and Chemical Engineering; Qufu Normal University; Shandong Key Laboratory of Life-Organic Analysis; Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine; Qufu 273165 Shandong P. R. China
| | - Jinmao You
- School of Chemistry and Chemical Engineering; Qufu Normal University; Shandong Key Laboratory of Life-Organic Analysis; Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine; Qufu 273165 Shandong P. R. China
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11
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Zhang R, Zhu H, Meng X, Cao Z, Chen G, Tian L, Sun X, You J. Base-Mediated Domino Reaction of ortho
-Carbonylated Alkynyl-Substituted Arenealdehydes with Indoles: Access to Indole-Functionalized Isobenzofurans. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700050] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Rumeng Zhang
- School of Chemistry and Chemical Engineering; Qufu Normal University; 273165 Qufu Shandong P. R. China
| | - Hongbo Zhu
- School of Chemistry and Chemical Engineering; Qufu Normal University; 273165 Qufu Shandong P. R. China
| | - Xin Meng
- School of Chemistry and Chemical Engineering; Qufu Normal University; 273165 Qufu Shandong P. R. China
| | - Ziping Cao
- School of Chemistry and Chemical Engineering; Qufu Normal University; 273165 Qufu Shandong P. R. China
- Shandong Key Laboratory of Life-Organic Analysis; Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine; 273165 Qufu Shandong P. R. China
| | - Guang Chen
- School of Chemistry and Chemical Engineering; Qufu Normal University; 273165 Qufu Shandong P. R. China
- Shandong Key Laboratory of Life-Organic Analysis; Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine; 273165 Qufu Shandong P. R. China
| | - Laijin Tian
- School of Chemistry and Chemical Engineering; Qufu Normal University; 273165 Qufu Shandong P. R. China
| | - Xuejun Sun
- School of Chemistry and Chemical Engineering; Qufu Normal University; 273165 Qufu Shandong P. R. China
| | - Jinmao You
- School of Chemistry and Chemical Engineering; Qufu Normal University; 273165 Qufu Shandong P. R. China
- Shandong Key Laboratory of Life-Organic Analysis; Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine; 273165 Qufu Shandong P. R. China
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12
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Cao Z, Zhu H, Meng X, Tian L, Chen G, Sun X, You J. Silver-Catalyzed Domino Reaction of ortho-Carbonylated Alkynyl-Substituted Arylaldehydes with Conjugated Dienes: Stereoselective Access to Indanone-Fused Cyclohexenes. J Org Chem 2016; 81:12401-12407. [PMID: 27978729 DOI: 10.1021/acs.joc.6b02529] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
A silver-catalyzed domino reaction of ortho-carbonylated alkynyl-substituted arylaldehydes with conjugated dienes is described here. Through this reaction, the synthesis of a variety of indanone-fused cyclohexene derivatives can be achieved efficiently. The formation of these tricyclic products could involve a key Diels-Alder reaction of in situ generated indanenone dienophiles with conjugated dienes. Particularly, the products can be accomplished in a high endo/exo selective way.
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Affiliation(s)
- Ziping Cao
- School of Chemistry and Chemical Engineering, Qufu Normal University , Qufu 273165, P. R. China.,Shandong Key Laboratory of Life-Organic Analysis, Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, Qufu Normal University , Qufu 273165, Shandong, China
| | - Hongbo Zhu
- School of Chemistry and Chemical Engineering, Qufu Normal University , Qufu 273165, P. R. China.,Shandong Key Laboratory of Life-Organic Analysis, Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, Qufu Normal University , Qufu 273165, Shandong, China
| | - Xin Meng
- School of Chemistry and Chemical Engineering, Qufu Normal University , Qufu 273165, P. R. China.,Shandong Key Laboratory of Life-Organic Analysis, Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, Qufu Normal University , Qufu 273165, Shandong, China
| | - Laijin Tian
- School of Chemistry and Chemical Engineering, Qufu Normal University , Qufu 273165, P. R. China.,Shandong Key Laboratory of Life-Organic Analysis, Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, Qufu Normal University , Qufu 273165, Shandong, China
| | - Guang Chen
- School of Chemistry and Chemical Engineering, Qufu Normal University , Qufu 273165, P. R. China.,Shandong Key Laboratory of Life-Organic Analysis, Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, Qufu Normal University , Qufu 273165, Shandong, China
| | - Xuejun Sun
- School of Chemistry and Chemical Engineering, Qufu Normal University , Qufu 273165, P. R. China.,Shandong Key Laboratory of Life-Organic Analysis, Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, Qufu Normal University , Qufu 273165, Shandong, China
| | - Jinmao You
- School of Chemistry and Chemical Engineering, Qufu Normal University , Qufu 273165, P. R. China.,Shandong Key Laboratory of Life-Organic Analysis, Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, Qufu Normal University , Qufu 273165, Shandong, China
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13
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Cao Z, Zhu H, Meng X, Guan J, Zhang Q, Tian L, Sun X, Chen G, You J. Metal-Free Reaction ofortho-Carbonylated Alkynyl-Substituted Arylaldehydes with Common Amines: Selective Access to Functionalized Isoindolinone and Indenamine Derivatives. Chemistry 2016; 22:16979-16985. [DOI: 10.1002/chem.201603045] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2016] [Indexed: 12/17/2022]
Affiliation(s)
- Ziping Cao
- School of Chemistry and Chemical Engineering; Qufu Normal University; Shandong Key Laboratory of Life-Organic Analysis; Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, Qufu; 273165 Shandong P. R. China
| | - Hongbo Zhu
- School of Chemistry and Chemical Engineering; Qufu Normal University; Shandong Key Laboratory of Life-Organic Analysis; Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, Qufu; 273165 Shandong P. R. China
| | - Xin Meng
- School of Chemistry and Chemical Engineering; Qufu Normal University; Shandong Key Laboratory of Life-Organic Analysis; Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, Qufu; 273165 Shandong P. R. China
| | - Jun Guan
- School of Chemistry and Chemical Engineering; Qufu Normal University; Shandong Key Laboratory of Life-Organic Analysis; Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, Qufu; 273165 Shandong P. R. China
| | - Qiang Zhang
- School of Chemistry and Chemical Engineering; Qufu Normal University; Shandong Key Laboratory of Life-Organic Analysis; Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, Qufu; 273165 Shandong P. R. China
| | - Laijin Tian
- School of Chemistry and Chemical Engineering; Qufu Normal University; Shandong Key Laboratory of Life-Organic Analysis; Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, Qufu; 273165 Shandong P. R. China
| | - Xuejun Sun
- School of Chemistry and Chemical Engineering; Qufu Normal University; Shandong Key Laboratory of Life-Organic Analysis; Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, Qufu; 273165 Shandong P. R. China
| | - Guang Chen
- School of Chemistry and Chemical Engineering; Qufu Normal University; Shandong Key Laboratory of Life-Organic Analysis; Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, Qufu; 273165 Shandong P. R. China
| | - Jinmao You
- School of Chemistry and Chemical Engineering; Qufu Normal University; Shandong Key Laboratory of Life-Organic Analysis; Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, Qufu; 273165 Shandong P. R. China
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