1
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Cook A, Newman SG. Alcohols as Substrates in Transition-Metal-Catalyzed Arylation, Alkylation, and Related Reactions. Chem Rev 2024; 124:6078-6144. [PMID: 38630862 DOI: 10.1021/acs.chemrev.4c00094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/19/2024]
Abstract
Alcohols are abundant and attractive feedstock molecules for organic synthesis. Many methods for their functionalization require them to first be converted into a more activated derivative, while recent years have seen a vast increase in the number of complexity-building transformations that directly harness unprotected alcohols. This Review discusses how transition metal catalysis can be used toward this goal. These transformations are broadly classified into three categories. Deoxygenative functionalizations, representing derivatization of the C-O bond, enable the alcohol to act as a leaving group toward the formation of new C-C bonds. Etherifications, characterized by derivatization of the O-H bond, represent classical reactivity that has been modernized to include mild reaction conditions, diverse reaction partners, and high selectivities. Lastly, chain functionalization reactions are described, wherein the alcohol group acts as a mediator in formal C-H functionalization reactions of the alkyl backbone. Each of these three classes of transformation will be discussed in context of intermolecular arylation, alkylation, and related reactions, illustrating how catalysis can enable alcohols to be directly harnessed for organic synthesis.
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Affiliation(s)
- Adam Cook
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Stephen G Newman
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
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2
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Winfrey L, Yun L, Passeri G, Suntharalingam K, Pulis AP. H 2 O ⋅ B(C 6 F 5 ) 3 -Catalyzed para-Alkylation of Anilines with Alkenes Applied to Late-Stage Functionalization of Non-Steroidal Anti-Inflammatory Drugs. Chemistry 2024; 30:e202303130. [PMID: 38224207 DOI: 10.1002/chem.202303130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Indexed: 01/16/2024]
Abstract
Anilines are core motifs in a variety of important molecules including medicines, materials and agrochemicals. We report a straightforward procedure that allows access to new chemical space of anilines via their para-C-H alkylation. The method utilizes commercially available catalytic H2 O ⋅ B(C6 F5 )3 and is highly selective for para-C-alkylation (over N-alkylation and ortho-C-alkylation) of anilines, with a wide scope in both the aniline substrates and alkene coupling partners. Readily available alkenes are used, and include new classes of alkene for the first time. The mild reaction conditions have allowed the procedure to be applied to the late-stage-functionalization of non-steroidal anti-inflammatory drugs (NSAIDs), including fenamic acids and diclofenac. The formed novel NSAID derivatives display improved anti-inflammatory properties over the parent NSAID structure.
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Affiliation(s)
- Laura Winfrey
- School of Chemistry, University of Leicester, Leicester, LE1 7RH, United Kingdom
| | - Lei Yun
- School of Chemistry, University of Leicester, Leicester, LE1 7RH, United Kingdom
| | - Ginevra Passeri
- School of Chemistry, University of Leicester, Leicester, LE1 7RH, United Kingdom
| | | | - Alexander P Pulis
- School of Chemistry, University of Leicester, Leicester, LE1 7RH, United Kingdom
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3
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Peng D, Xu M, Tan C, Chen C. Emulsion Polymerization Strategy for Heterogenization of Olefin Polymerization Catalysts. Macromolecules 2023. [DOI: 10.1021/acs.macromol.3c00261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
Affiliation(s)
- Dan Peng
- CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Menghe Xu
- CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Chen Tan
- Institute of Physical Science and Information Technology, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University, Hefei, Anhui 230601, China
| | - Changle Chen
- CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China
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4
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Chigumbu P, Fu J, Takia IRT, Wang Y, Han X. Friedel-Crafts Benzylation of Unprotected Anilines with Indole-3-
carbinols to Access Trifluoro-methyl(indolyl)phenylmethanes. LETT ORG CHEM 2022. [DOI: 10.2174/1570178618666210225114226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
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An unprecedented protocol for the efficient and highly chemoselective alkylation of unprotected anilines with deactivated CF3-indole-3-carbinols promoted by In(OTf)3 has been developed. A series of diversified trifluoromethylated (indolyl)phenylmethanes were produced featuring the C-alkylation in moderate to high chemical yields and with high regioselectivities.
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Affiliation(s)
- Paidamoyo Chigumbu
- Provincial Key Laboratory for Chemical & Biological Processing, Technology of Farm Products, School of Biological
and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou, Zhejiang, China, 310023
| | - Junfeng Fu
- Provincial Key Laboratory for Chemical & Biological Processing, Technology of Farm Products, School of Biological
and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou, Zhejiang, China, 310023
| | - Ingrid Rakielle Tsapy Takia
- Provincial Key Laboratory for Chemical & Biological Processing, Technology of Farm Products, School of Biological
and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou, Zhejiang, China, 310023
| | - Yongjiang Wang
- Provincial Key Laboratory for Chemical & Biological Processing, Technology of Farm Products, School of Biological
and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou, Zhejiang, China, 310023
| | - Xiaoyu Han
- Provincial Key Laboratory for Chemical & Biological Processing, Technology of Farm Products, School of Biological
and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou, Zhejiang, China, 310023
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5
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Anderson SM, Van Engen MD, Floreancig PE. Solvent Effects and Mechanistic Studies for Re 2O 7-Catalyzed Allylative Annulation Reactions. J Org Chem 2021; 87:1830-1839. [PMID: 34932336 DOI: 10.1021/acs.joc.1c02466] [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
The sequence of allylic alcohol transposition, carbonyl group trapping, oxocarbenium ion formation, and nucleophilic addition results in the formation of a ring while serving as a fragment-coupling and stereocenter-generating reaction. Successful applications of these processes require a balancing of the kinetics of numerous productive and unproductive steps. This work describes the manner in which solvent changes can be used to expand the scope and change the stereochemical outcomes of these processes. Mechanistic studies provide greater insight into the nuances of the transformations and the reactive species that are generated.
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Affiliation(s)
- Shelby M Anderson
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Marcus D Van Engen
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Paul E Floreancig
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
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6
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Ponpao N, Senapak W, Saeeng R, Jaratjaroonphong J, Sirion U. Metal- and solvent-free synthesis of aniline- and phenol-based triarylmethanes via Brönsted acidic ionic liquid catalyzed Friedel-Crafts reaction. RSC Adv 2021; 11:22692-22709. [PMID: 35480415 PMCID: PMC9034371 DOI: 10.1039/d1ra03724b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 06/18/2021] [Indexed: 01/04/2023] Open
Abstract
A beneficial, scalable and efficient methodology for the synthesis of aniline-based triarylmethanes has been established through the double Friedel-Crafts reaction of commercial aldehydes and primary, secondary or tertiary anilines using Brönsted acidic ionic liquid as a powerful catalyst, namely [bsmim][NTf2]. This protocol was successfully performed under metal- and solvent-free conditions with a broad range of substrates, giving the corresponding aniline-based triarylmethane products in good to excellent yields (up to 99%). In addition, alternative aromatic nucleophiles such as phenols and electron-rich arenes were also studied using this useful approach to achieve a diversity of triarylmethane derivatives in high to excellent yields. Brönsted acidic ionic liquid catalyzed the synthesis of aniline- and phenol-based triarylmethanes via Friedel-Crafts reaction under metal- and solvent-free conditions.![]()
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Affiliation(s)
- Nipaphorn Ponpao
- Department of Chemistry, Center of Excellence for Innovation in Chemistry, Faculty of Science, Burapha University Sangesook ChonBuri 20131 Thailand +66-3-839-3494 +66-98-026-2181
| | - Warapong Senapak
- Department of Chemistry, Center of Excellence for Innovation in Chemistry, Faculty of Science, Burapha University Sangesook ChonBuri 20131 Thailand +66-3-839-3494 +66-98-026-2181
| | - Rungnapha Saeeng
- Department of Chemistry, Center of Excellence for Innovation in Chemistry, Faculty of Science, Burapha University Sangesook ChonBuri 20131 Thailand +66-3-839-3494 +66-98-026-2181.,The Research Unit in Synthetic Compounds and Synthetic Analogues from Natural Product for Drug Discovery (RSND), Burapha University Chonburi 20131 Thailand
| | - Jaray Jaratjaroonphong
- Department of Chemistry, Center of Excellence for Innovation in Chemistry, Faculty of Science, Burapha University Sangesook ChonBuri 20131 Thailand +66-3-839-3494 +66-98-026-2181.,The Research Unit in Synthetic Compounds and Synthetic Analogues from Natural Product for Drug Discovery (RSND), Burapha University Chonburi 20131 Thailand
| | - Uthaiwan Sirion
- Department of Chemistry, Center of Excellence for Innovation in Chemistry, Faculty of Science, Burapha University Sangesook ChonBuri 20131 Thailand +66-3-839-3494 +66-98-026-2181.,The Research Unit in Synthetic Compounds and Synthetic Analogues from Natural Product for Drug Discovery (RSND), Burapha University Chonburi 20131 Thailand
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7
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Aromatic Aza‐Claisen Rearrangement of Arylpropargylammonium Salts Generated in situ from Arynes and Tertiary Propargylamines. Chemistry 2021; 27:3091-3097. [DOI: 10.1002/chem.202004356] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Indexed: 01/06/2023]
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8
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Chen L, Zou YX, Zheng SL, Liu XY, Yang HL, Zhang J, Zeng Y, Duan L, Wen Z, Ni HL. Dearomative 1,6-addition of P(O)–H to in situ formed p-QM-like ion pairs from 2-benzofuryl-ols to C3-phosphinoyl hydrobenzofurans. Org Chem Front 2021. [DOI: 10.1039/d1qo00076d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We report a dearomative C3-phosphorylation and a tandem C3-phosphorylation/aromatization of 2-benzofuryl-ols with P(O)–H species to afford C3-phosphinoyl hydrobenzofurans and benzofurans, respectively.
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9
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Zou Y, Ni H, Dong H, Yang X, Chen L. A HClO
4
‐Catalyzed Substitutive Phosphorylation of Anthracene‐9‐ols with P(O)−H Compounds to Phosphorylated 9,10‐Dihydroanthracenes. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000385] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Yun‐Xiang Zou
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province Sichuan Industrial Institute of Antibiotics Chengdu University 168 Hua Guan Road Chengdu 610052 P. R. China
| | - Hai‐Liang Ni
- College of Chemistry and Materials Science Sichuan Normal University 5 Jing An Road Chengdu 610066 P. R. China
| | - Hong‐Bo Dong
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province Sichuan Industrial Institute of Antibiotics Chengdu University 168 Hua Guan Road Chengdu 610052 P. R. China
| | - Xin‐Yue Yang
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province Sichuan Industrial Institute of Antibiotics Chengdu University 168 Hua Guan Road Chengdu 610052 P. R. China
| | - Long Chen
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province Sichuan Industrial Institute of Antibiotics Chengdu University 168 Hua Guan Road Chengdu 610052 P. R. China
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10
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Albert‐Soriano M, M. Pastor I. Anion‐Dependent Imidazolium‐Based Catalysts for Allylation of Aniline with Tunable Regioselectivity. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000102] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- María Albert‐Soriano
- Organic Chemistry Department and Instituto de Síntesis Orgánica (ISO)University of Alicante Apdo. 99 03080 Alicante Spain
| | - Isidro M. Pastor
- Organic Chemistry Department and Instituto de Síntesis Orgánica (ISO)University of Alicante Apdo. 99 03080 Alicante Spain
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11
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Janes T, Diskin‐Posner Y, Milstein D. Synthesis and Reactivity of Cationic Boron Complexes Distorted by Pyridine‐based Pincer Ligands: Isolation of a Photochemical Hofmann–Martius‐type Intermediate. Angew Chem Int Ed Engl 2020; 59:4932-4936. [DOI: 10.1002/anie.202000406] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Indexed: 11/08/2022]
Affiliation(s)
- Trevor Janes
- Department of Organic ChemistryWeizmann Institute of Science Rehovot 76100 Israel
| | - Yael Diskin‐Posner
- Chemical Research SupportWeizmann Institute of Science Rehovot 76100 Israel
| | - David Milstein
- Department of Organic ChemistryWeizmann Institute of Science Rehovot 76100 Israel
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12
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Janes T, Diskin‐Posner Y, Milstein D. Synthesis and Reactivity of Cationic Boron Complexes Distorted by Pyridine‐based Pincer Ligands: Isolation of a Photochemical Hofmann–Martius‐type Intermediate. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202000406] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Trevor Janes
- Department of Organic ChemistryWeizmann Institute of Science Rehovot 76100 Israel
| | - Yael Diskin‐Posner
- Chemical Research SupportWeizmann Institute of Science Rehovot 76100 Israel
| | - David Milstein
- Department of Organic ChemistryWeizmann Institute of Science Rehovot 76100 Israel
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13
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Reactivity of Re2O7 in aromatic solvents – Cleavage of a β-O-4 lignin model substrate by Lewis-acidic rhenium oxide nanoparticles. J Catal 2019. [DOI: 10.1016/j.jcat.2019.03.042] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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14
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Aegurla B, Peddinti RK. Dehydrative C‐ and S‐Alkylation: Access to Highly Substituted 1‐Sulfonylpropanes. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201800587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Balakrishna Aegurla
- Department of ChemistryIndian Institute of Technology Roorkee Roorkee- 247 667, Uttarakhand India
| | - Rama Krishna Peddinti
- Department of ChemistryIndian Institute of Technology Roorkee Roorkee- 247 667, Uttarakhand India
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15
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Qin Q, Xie Y, Floreancig PE. Diarylmethane synthesis through Re 2O 7-catalyzed bimolecular dehydrative Friedel-Crafts reactions. Chem Sci 2018; 9:8528-8534. [PMID: 30568776 PMCID: PMC6251338 DOI: 10.1039/c8sc03570a] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Accepted: 08/30/2018] [Indexed: 01/14/2023] Open
Abstract
This manuscript describes the application of Re2O7 to the syntheses of diarylmethanes from benzylic alcohols through solvolysis followed by Friedel-Crafts alkylation. The reactions are characterized by broad substrate scope, low catalyst loadings, high chemical yields, and minimal waste generation. The intermediate perrhenate esters are superior leaving groups to chlorides and bromides in these reactions. The polarity and water sequestering capacity of hexafluoroisopropyl alcohol are critical to the success of these processes. Re2O7 is a precatalyst for HOReO3, which serves as a less costly and easily handled promoter for these reactions. Oxorhenium catalysts selectively activate alcohols in the presence of similarly substituted acetates, indicating a unique chemoselectivity and mechanism in comparison to Brønsted acid catalysis.
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Affiliation(s)
- Qi Qin
- Department of Chemistry , University of Pittsburgh , Pittsburgh , Pennsylvania 15260 , USA .
| | - Youwei Xie
- School of Chemistry and Chemical Engineering , Huazhong University of Science and Technology , Wuhan 430074 , P. R. China .
| | - Paul E Floreancig
- Department of Chemistry , University of Pittsburgh , Pittsburgh , Pennsylvania 15260 , USA .
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16
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Qi Z, Zhang B, Ji J, Li X, Dai T, Guo H, Wang A, Lu L, Li C. Selective Cleavage of C-O Bonds in Lignin Catalyzed by Rhenium(VII) Oxide (Re 2 O 7 ). Chempluschem 2018; 83:500-505. [PMID: 31950656 DOI: 10.1002/cplu.201700547] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 02/09/2018] [Indexed: 01/01/2023]
Abstract
The selective cleavage of C-O bonds in typical model lignin β-O-4 compounds and deconstruction of a realistic lignin feedstock catalyzed by Re2 O7 is described. High yields of C-O cleavage products (up to 97.8 %) from model compounds and oils (76.3 %) from organosolv pinewood lignin were obtained under mild conditions. Evidence for the pathway of this catalytic process is also provided.
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Affiliation(s)
- Zaojuan Qi
- College of Chemistry, Xiangtan University, Xiangtan, Hunan, 411105, P. R. China.,State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China
| | - Bo Zhang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China
| | - Jianwei Ji
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China.,Shaanxi Key Laboratory of Catalysis, School of Chemistry and Environment Science, Shaanxi University of Technology, Hanzhong, 723001, P. R. China
| | - Xinxin Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China
| | - Tao Dai
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Haiwei Guo
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Aiqin Wang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China
| | - Lican Lu
- College of Chemistry, Xiangtan University, Xiangtan, Hunan, 411105, P. R. China
| | - Changzhi Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China
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17
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Inamdar SM, Gonnade RG, Patil NT. Synthesis of annulated bis-indoles through Au(i)/Brønsted acid-catalyzed reactions of (1H-indol-3-yl)(aryl)methanols with 2-(arylethynyl)-1H-indoles. Org Biomol Chem 2018; 15:863-869. [PMID: 28009921 DOI: 10.1039/c6ob02595a] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A general method to access annulated bis-indoles from (1H-indol-3-yl)(aryl)methanols and 2-(arylethynyl)-1H-indoles under the catalysis of the Ph3PAuOTf/Brønsted acid binary catalyst system has been developed. The reaction was found to proceed in a highly efficient manner and benefit from easy-to-make starting materials, broad substrate scope and operational simplicity. The potential of this method has also been exemplified for the synthesis of pyrrole-annulated indoles using 2-(phenylethynyl)-1H-indoles and phenyl(1H-pyrrol-2-yl)methanols. Furthermore, the use of a ternary catalyst system, involving PdCl2/Brønsted acid/Ph3PAuOTf catalysts, has been realized for the synthesis of annulated bis-indoles starting directly from 2-(phenylbuta-1,3-diyn-1-yl)aniline and (1H-indol-3-yl)(aryl)methanol. Mechanistically, this reaction is very interesting since the overall process involves three different catalytic cycles catalyzed by three different catalysts in a relay fashion.
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Affiliation(s)
- Suleman M Inamdar
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune - 411 008, India.
| | - Rajesh G Gonnade
- Center for Material Characterization, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune - 411 008, India
| | - Nitin T Patil
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune - 411 008, India. and Academy of Scientific and Innovative Research (AcSIR), New Delhi - 110 025, India
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18
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Huang J, Li G, Yang G, Zhao J, Tang Z. Brønsted-Acid-Catalyzed Substrate-Controlled and Site-Selective Friedel-Crafts Alkylation: A New Strategy for Post-Modification of 1,2-Dihydroquinolines. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700438] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Jin Huang
- Natural Product Research Center; Chengdu Institution of Biology; Chinese Academy of Science; Chengdu Sichuan 610041 China
| | - Guangxun Li
- Natural Product Research Center; Chengdu Institution of Biology; Chinese Academy of Science; Chengdu Sichuan 610041 China
| | - Guobin Yang
- College of Art and Sciences; Shanxi Agricultural University; Taigu Shanxi 030800 China
| | - Jinzhong Zhao
- College of Art and Sciences; Shanxi Agricultural University; Taigu Shanxi 030800 China
| | - Zhuo Tang
- Natural Product Research Center; Chengdu Institution of Biology; Chinese Academy of Science; Chengdu Sichuan 610041 China
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19
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Rehan M, Nallagonda R, Das BG, Meena T, Ghorai P. Synthesis of Functionalized Benzo[b]furans via Oxidative Cyclization of o-Cinnamyl Phenols. J Org Chem 2017; 82:3411-3424. [PMID: 28249386 DOI: 10.1021/acs.joc.6b02752] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Disclosed herein is an efficient synthetic route for the synthesis of functionalized 2-benzyl benzo[b]furans via a regioselective 5-exo-trig intramolecular oxidative cyclization of ortho-cinnamyl phenols using [PdCl2(CH3CN)2] as catalyst and benzoquinone as an oxidant. Further, a sequential ortho-cinnamylation of phenols using cinnamyl alcohols catalyzed by Re2O7, followed by an oxidative cyclization using the above Pd catalyst, is performed. The reaction showed broad substrate scope with good to excellent yields.
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Affiliation(s)
- Mohammad Rehan
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal , Bhauri, Bhopal-462066, India
| | - Rajender Nallagonda
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal , Bhauri, Bhopal-462066, India
| | - Braja Gopal Das
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal , Bhauri, Bhopal-462066, India
| | - Tannu Meena
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal , Bhauri, Bhopal-462066, India
| | - Prasanta Ghorai
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal , Bhauri, Bhopal-462066, India
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20
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Hikawa H, Ijichi Y, Kikkawa S, Azumaya I. Cobalt(II)/TPPMS-Catalyzed Dehydrative Nucleophilic Substitution of Alcohols in Water. European J Org Chem 2016. [DOI: 10.1002/ejoc.201601501] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Hidemasa Hikawa
- Faculty of Pharmaceutical Sciences; Toho University; 2-2-1 Miyama 274-8510 Funabashi, Chiba Japan
| | - Yukiko Ijichi
- Faculty of Pharmaceutical Sciences; Toho University; 2-2-1 Miyama 274-8510 Funabashi, Chiba Japan
| | - Shoko Kikkawa
- Faculty of Pharmaceutical Sciences; Toho University; 2-2-1 Miyama 274-8510 Funabashi, Chiba Japan
| | - Isao Azumaya
- Faculty of Pharmaceutical Sciences; Toho University; 2-2-1 Miyama 274-8510 Funabashi, Chiba Japan
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21
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Amézquita-Valencia M, Alper H. Palladium-Catalyzed Regioselective C-Benzylation via a Rearrangement Reaction: Access to Benzyl-Substituted Anilines. Chemistry 2016; 22:16774-16778. [PMID: 27617396 DOI: 10.1002/chem.201603941] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Indexed: 01/01/2023]
Abstract
An unprecedented C-benzylation rearrangement reaction, catalyzed by palladium, is reported. The reaction proceeds by rearrangement leading to the direct synthesis of para or ortho benzyl-substituted N-methylanilines. The product is obtained in high regioselectivity, without the need to use a ligand for the catalytic process.
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Affiliation(s)
- Manuel Amézquita-Valencia
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario, K1N 6N5, Canada
| | - Howard Alper
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario, K1N 6N5, Canada
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22
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Trillo P, Pastor IM. Iron-Based Imidazolium Salts as Versatile Catalysts for the Synthesis of Quinolines and 2- and 4-Allylanilines by Allylic Substitution of Alcohols. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600315] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Paz Trillo
- Department of Organic Chemistry; Faculty of Science and Instituto de Síntesis Orgánica (ISO); University of Alicante; Apdo. 99 03080 Alicante Spain
| | - Isidro M. Pastor
- Department of Organic Chemistry; Faculty of Science and Instituto de Síntesis Orgánica (ISO); University of Alicante; Apdo. 99 03080 Alicante Spain
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23
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Ji YZ, Wang M, Li HJ, Liu Y, Wu YC. Direct Sulfination of Nonactivated Alcohols with Arylsulfonylmethyl Isocyanides. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600629] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Yuan-Zhao Ji
- School of Marine Science and Technology; Harbin Institute of Technology; No. 2, Wenhuaxi Road 264209 Weihai P. R. China
| | - Meirong Wang
- School of Materials Science and Engineering; Harbin Institute of Technology; No. 2, Wenhuaxi Road 264209 Weihai P. R. China
| | - Hui-Jing Li
- School of Marine Science and Technology; Harbin Institute of Technology; No. 2, Wenhuaxi Road 264209 Weihai P. R. China
| | - Ying Liu
- School of Marine Science and Technology; Harbin Institute of Technology; No. 2, Wenhuaxi Road 264209 Weihai P. R. China
| | - Yan-Chao Wu
- School of Marine Science and Technology; Harbin Institute of Technology; No. 2, Wenhuaxi Road 264209 Weihai P. R. China
- Beijing National Laboratory for Molecular Sciences (BNLMS); Institute of Chemistry Chinese Academy of Sciences; No.2, 1st North Street, Zhongguancun 100190 Beijing P. R. China
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24
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Xia L, Idhayadhulla A, Lee YR. Re2O7-catalyzed formal [3 + 2] cycloaddition for diverse naphtho[1,2-b]furan-3-carboxamides and their biological evaluation. Mol Divers 2015; 20:17-28. [PMID: 26260267 DOI: 10.1007/s11030-015-9630-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Accepted: 08/02/2015] [Indexed: 10/23/2022]
Abstract
Diverse naphtho[1,2-b]furan-3-carboxamide derivatives 12a-12q were synthesized in high yield via the novel Re2O7-catalyzed formal [3 + 2] cycloaddition of 1,4-naphthoquinones with β-ketoamides as the key step. This methodology offers several advantages, such as environmentally benign character, the use of a mild catalyst, high yields, and ease of handling. The synthesized compounds were screened for their tyrosinase inhibitory, antioxidant, and antibacterial activities. The results showed that compound 12c exhibited excellent tyrosinase inhibitory activity with an IC50 of 13.48 μg/mL, which is comparable to that of kojic acid (IC50 = 19.45 μg/mL). Compounds 12a, 12b, and 12i displayed moderate antioxidant activities in a DPPH assay. Compound 12m showed good activity against S. aureus (MIC = 16 μg/mL), and compound 12p was found to be active against E. coli (MIC = 16 μg/mL).
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Affiliation(s)
- Likai Xia
- School of Chemical Engineering, Yeungnam University, Gyeongsan, 712-749, Republic of Korea
| | - Akber Idhayadhulla
- School of Chemical Engineering, Yeungnam University, Gyeongsan, 712-749, Republic of Korea
| | - Yong Rok Lee
- School of Chemical Engineering, Yeungnam University, Gyeongsan, 712-749, Republic of Korea.
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25
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Das BG, Nallagonda R, Dey D, Ghorai P. Synthesis of Air- and Moisture-Stable, Storable Chiral Oxorhenium Complexes and Their Application as Catalysts for the Enantioselective Imine Reduction. Chemistry 2015; 21:12601-5. [DOI: 10.1002/chem.201501914] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Indexed: 01/14/2023]
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26
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Rehan M, Hazra G, Ghorai P. Synthesis of polysubstituted quinolines via transition-metal-free oxidative cycloisomerization of o-cinnamylanilines. Org Lett 2015; 17:1668-71. [PMID: 25768127 DOI: 10.1021/acs.orglett.5b00419] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An efficient synthesis of 2-aryl 4-substituted quinolines from stable and readily available o-cinnamylanilines, prepared from anilines and cinnamylalcohols, has been developed. The reaction occurred via a regioselective 6-endo-trig intramolecular oxidative cyclization using KO(t)Bu as a mediator and DMSO as an oxidant at rt. The reaction showed a broad substrate scope with good to excellent yields.
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Affiliation(s)
- Mohammad Rehan
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Indore By-pass Road, Bhouri, Bhopal-462066, India
| | - Gurupada Hazra
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Indore By-pass Road, Bhouri, Bhopal-462066, India
| | - Prasanta Ghorai
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Indore By-pass Road, Bhouri, Bhopal-462066, India
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27
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Wang X, Liu J, Xu L, Hao Z, Wang L, Xiao J. Friedel–Crafts alkylation of heteroarenes and arenes with indolyl alcohols for construction of 3,3-disubstituted oxindoles. RSC Adv 2015. [DOI: 10.1039/c5ra21919a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
An intriguing camphorsulfonic acid catalyzed Friedel–Crafts alkylation of arenes with indolyl alcohols has been developed featuring mild reaction conditions, wide substrate scope and high yields.
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Affiliation(s)
- Xiaoxiao Wang
- College of Chemical Engineering
- Qingdao University of Science and Technology
- Qingdao
- China
| | - Jian Liu
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao
- China
| | - Lubin Xu
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao
- China
| | - Zhihui Hao
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao
- China
| | - Liang Wang
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao
- China
| | - Jian Xiao
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao
- China
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28
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Desroches J, Champagne PA, Benhassine Y, Paquin JF. In situ activation of benzyl alcohols with XtalFluor-E: formation of 1,1-diarylmethanes and 1,1,1-triarylmethanes through Friedel–Crafts benzylation. Org Biomol Chem 2015; 13:2243-6. [DOI: 10.1039/c4ob02655a] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Friedel–Crafts benzylation of arenes using benzyl alcohols activated in situ with XtalFluor-E is described. A wide range of 1,1-diarylmethanes and 1,1,1-triarylmethanes were prepared under simple and mild conditions, without the need for a transition metal or a strong Lewis acid.
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Affiliation(s)
- Justine Desroches
- Canada Research Chair in Organic and Medicinal Chemistry
- CGCC
- PROTEO
- Département de chimie
- Université Laval
| | - Pier Alexandre Champagne
- Canada Research Chair in Organic and Medicinal Chemistry
- CGCC
- PROTEO
- Département de chimie
- Université Laval
| | - Yasmine Benhassine
- Canada Research Chair in Organic and Medicinal Chemistry
- CGCC
- PROTEO
- Département de chimie
- Université Laval
| | - Jean-François Paquin
- Canada Research Chair in Organic and Medicinal Chemistry
- CGCC
- PROTEO
- Département de chimie
- Université Laval
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29
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Zhou LJ, Zhang YC, Zhao JJ, Shi F, Tu SJ. Organocatalytic arylation of 3-indolylmethanols via chemo- and regiospecific C6-functionalization of indoles. J Org Chem 2014; 79:10390-8. [PMID: 25310842 DOI: 10.1021/jo501989x] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
An organocatalytic arylation of 3-indolylmethanols has been established via chemo- and regiospecific C6-functionalization of 2,3-disubstituted indoles, leading to the production of bisindolyloxindoles containing an all-carbon quaternary stereocenter in high yields (up to 99% yield). This reaction not only represents the first catalytic arylation of 3-indolylmethanols using 2,3-disubstituted indoles as aromatic nucleophiles but also serves as a good example of direct catalytic C6-functionalization of indoles, which have been scarcely investigated. Besides, this approach also provides an efficient method to access a biologically important 3,3'-disubstituted oxindole framework and a 3',6-linked bisindole skeleton. Furthermore, the investigation of the activation mode suggested that the dual activation of an ion pair and H-bond between the substrates and the catalyst cooperatively contributed to the success of the reaction.
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Affiliation(s)
- Lu-Jia Zhou
- School of Chemistry & Chemical Engineering, and Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University , Xuzhou, 221116, China
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30
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Nallagonda R, Rehan M, Ghorai P. Synthesis of Functionalized Indoles via Palladium-Catalyzed Aerobic Oxidative Cycloisomerization of o-Allylanilines. Org Lett 2014; 16:4786-9. [DOI: 10.1021/ol502244g] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Rajender Nallagonda
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal 462066, India
| | - Mohammad Rehan
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal 462066, India
| | - Prasanta Ghorai
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal 462066, India
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