1
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Mondal K, Ghosh S, Hajra A. Transition-metal-catalyzed ortho C-H functionalization of 2-arylquinoxalines. Org Biomol Chem 2022; 20:7361-7376. [PMID: 36107011 DOI: 10.1039/d2ob01119k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Recently, direct C-H bond activation and functionalization has become a prodigious and hot topic among synthetic organic chemists due to its step-economic nature and substantial synthetic versatility. On the other hand, quinoxaline, a fused bicycle of benzene and pyrazine, has omnipresent applications in medicinal-, industrial- and materials chemistry. The presence of the N-1 atom in 2-arylquinoxaline enables chelation formation with a metal catalyst leading to the formation of ortho-substituted products. In this review, all articles related to the ortho C-H bond functionalization of 2-arylquinoxalines published up to May 2022 are highlighted.
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Affiliation(s)
- Koushik Mondal
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India.
| | - Sumit Ghosh
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India.
| | - Alakananda Hajra
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India.
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2
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Wang Y, Wang H, Yang Q, Xie S, Zhu H. Quinazoline‐Assisted ortho‐Halogenation with N‐Halosuccinimides through Pa(II)‐Catalyzed C(sp2)‐H Activation. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Yong Wang
- Nanjing Tech University College of Chemistry and Molecular Engineering Nanjing CHINA
| | - Hui Wang
- Nanjing Tech University College of Chemistry and Molecular Engineering Nanjing CHINA
| | - Qifan Yang
- Nanjing Tech University College of Chemistry and Molecular Engineering Nanjing CHINA
| | - Shihua Xie
- Nanjing Tech University College of Chemistry and Molecular Engineering Nanjing CHINA
| | - Hongjun Zhu
- Nanjing Tech University Department of Applied Chemistry, College of Science No 30, South Puzhu 211816 Nanjing CHINA
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3
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Farshadfar K, Tizhoush SK, Ariafard A. Role of Brønsted Acids in Promoting Pd(OAc)2-Catalyzed Chlorination of Phenol Carbamates Using N-Chlorosuccinimide. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kaveh Farshadfar
- Department of Chemistry, Islamic Azad University, Central Tehran Branch, Poonak, Tehran 1469669191, Iran
| | - Samaneh K. Tizhoush
- Department of Chemistry, Islamic Azad University, Central Tehran Branch, Poonak, Tehran 1469669191, Iran
| | - Alireza Ariafard
- School of Natural Sciences─Chemistry, University of Tasmania, Private Bag 75, Hobart, Tasmania 7001, Australia
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4
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Hirashita T, Watanabe H, Harada Y, Kurabayashi H, Yukinobu, Yamashita, Oizumi S, Araki S. Palladium‐Catalyzed Selective
o
‐Bromination of Mesoionic 1,3‐Diphenyltetrazolium‐5‐olate: Switching the Directing Group from Nitrogen to Oxygen. ChemistrySelect 2021. [DOI: 10.1002/slct.202103841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Tsunehisa Hirashita
- Life Science and Applied Chemistry Graduate School of Engineering Nagoya Institute of Technology Gokiso-cho, Showa-ku, Nagoya Aichi 466-8555 Japan
| | - Harue Watanabe
- Life Science and Applied Chemistry Graduate School of Engineering Nagoya Institute of Technology Gokiso-cho, Showa-ku, Nagoya Aichi 466-8555 Japan
| | - Yuki Harada
- Life Science and Applied Chemistry Graduate School of Engineering Nagoya Institute of Technology Gokiso-cho, Showa-ku, Nagoya Aichi 466-8555 Japan
| | - Hideaki Kurabayashi
- Life Science and Applied Chemistry Graduate School of Engineering Nagoya Institute of Technology Gokiso-cho, Showa-ku, Nagoya Aichi 466-8555 Japan
| | - Yukinobu
- Life Science and Applied Chemistry Graduate School of Engineering Nagoya Institute of Technology Gokiso-cho, Showa-ku, Nagoya Aichi 466-8555 Japan
| | - Yamashita
- Life Science and Applied Chemistry Graduate School of Engineering Nagoya Institute of Technology Gokiso-cho, Showa-ku, Nagoya Aichi 466-8555 Japan
| | - Shiyogo Oizumi
- Life Science and Applied Chemistry Graduate School of Engineering Nagoya Institute of Technology Gokiso-cho, Showa-ku, Nagoya Aichi 466-8555 Japan
| | - Shuki Araki
- Life Science and Applied Chemistry Graduate School of Engineering Nagoya Institute of Technology Gokiso-cho, Showa-ku, Nagoya Aichi 466-8555 Japan
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5
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Sunny S, John SE, Shankaraiah N. Exploration of C‐H Activation Strategies in Construction of Functionalized 2‐Aryl Benzoazoles: A Decisive Review. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100297] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Steeva Sunny
- Department of Medicinal Chemistry National Institute of Pharmaceutical Education and Research (NIPER) Hyderabad 500037 India
| | - Stephy Elza John
- Department of Medicinal Chemistry National Institute of Pharmaceutical Education and Research (NIPER) Hyderabad 500037 India
| | - Nagula Shankaraiah
- Department of Medicinal Chemistry National Institute of Pharmaceutical Education and Research (NIPER) Hyderabad 500037 India
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6
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Boddapati SNM, Tamminana R, Alam MM, Gugulothu S, Varala R, Bollikolla HB. Efficient Pd( ii)-catalyzed regioselective ortho-halogenation of arylcyanamides. NEW J CHEM 2021. [DOI: 10.1039/d1nj01998h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
2-Halo arylcyanamides have been constructed from cyanamides via Pd(ii)-catalyzed selective ortho-halogenation under moderate reaction conditions.
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Affiliation(s)
- S. N. Murthy Boddapati
- Department of Chemistry, Acharya Nagarjuna University, N Nagar, Guntur, A. P-522510, India
- Department of Chemistry, Sir C R Reddy College, P G Courses, Eluru, A.P-534007, India
| | - Ramana Tamminana
- Department of Chemistry, GITAM Deemed to be University, Bengaluru Campus, Bengaluru Rural, Karnataka, 562163, India
| | - M. Mujahid Alam
- Department of Chemistry, College of Science, King Khalid University, PO Box 9004, Abha 61413, Saudi Arabia
| | - Sailaja Gugulothu
- Department of Chemistry, Acharya Nagarjuna University, N Nagar, Guntur, A. P-522510, India
| | | | - Hari Babu Bollikolla
- Department of Chemistry, Acharya Nagarjuna University, N Nagar, Guntur, A. P-522510, India
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7
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Singh M, Vaishali, Paul AK, Singh V. Isatin as a 2-aminobenzaldehyde surrogate: transition metal-free efficient synthesis of 2-(2'-aminophenyl)benzothiazole derivatives. Org Biomol Chem 2020; 18:4459-4469. [PMID: 32490470 DOI: 10.1039/d0ob00888e] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A transition metal-free, convenient, and efficient practical approach has been devised for the synthesis of substituted 2-(2'-aminophenyl)benzothiazoles via a sulfur insertion strategy using isatin derivatives as 2-aminobenzaldehyde surrogates. KI assisted one-pot operation of isatin, arylamines and elemental sulfur resulted in the formation of a C-N and two C-S bonds and cascade cleavage of the isatin ring resulting in the formation of 2-(2'-aminophenyl)benzothiazoles. The significant features of this strategy are the readily available and inexpensive starting materials, broad substrate scope, sustainable reaction conditions and high yield of products. Importantly, the strategy was found to be appropriate for gram scale synthesis (>10 g) of 2-(2'-aminophenyl)benzothiazole derivatives. Moreover, the excellent photophysical properties (ΦF up to 60%) of 2-(2'-aminophenyl)benzothiazole derivatives provide huge scope in materials science.
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Affiliation(s)
- Manpreet Singh
- Department of Chemistry, Dr B R Ambedkar National Institute of Technology (NIT) Jalandhar, 144011, Punjab, India.
| | - Vaishali
- Department of Chemistry, Dr B R Ambedkar National Institute of Technology (NIT) Jalandhar, 144011, Punjab, India.
| | - Avijit Kumar Paul
- Department of Chemistry, National Institute of Technology (NIT) Kurukshetra, 136119, Haryana, India
| | - Virender Singh
- Department of Chemistry, Dr B R Ambedkar National Institute of Technology (NIT) Jalandhar, 144011, Punjab, India. and Department of Chemistry, Central University of Punjab, Bathinda, 151001, Punjab, India. virender.singh.cup.edu.in
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8
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Saha M, Das AR. Hypervalent iodine promoted ortho diversification: 2-aryl benzimidazole, quinazoline and imidazopyridine as directing templates. Org Biomol Chem 2020; 18:941-955. [PMID: 31922163 DOI: 10.1039/c9ob02533b] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The mild and efficient palladium-catalyzed ortho C(sp2)-H diversification of (NH)-free 2-substituted benzimidazole, quinazoline, and imidazopyridine is reported using hypervalent iodine as the key reagent. Acetoxy, aryl, iodide and nitro functional groups were introduced on the same substrate by simply shifting the reaction conditions in the presence of inorganic additives (Cs2CO3, I2, NaNO2) and the hypervalent iodine reagent (diacetoxyiodo)benzene (PIDA) under aerobic conditions. The combination of NaNO2 with PIDA was successfully employed in Pd-catalyzed C-H bond nitration to achieve a library of nitrated 1,3 N-heterocycles. This versatile ortho C(sp2)-H activation strategy features operational simplicity, short reaction times, and ample substrate possibilities, it requires no ligands or silver salts as additives, and it shows good tolerance of oxidation prone functional groups.
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Affiliation(s)
- Moumita Saha
- Department of Chemistry, University of Calcutta, Kolkata, West Bengal, India.
| | - Asish R Das
- Department of Chemistry, University of Calcutta, Kolkata, West Bengal, India.
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9
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Vu HM, Chen F, Li X. Acetoxylation and Halogenation of 2‐Arylbenzoxazinones via Palladium‐Catalyzed C(sp
2
)‐H Bond Oxidation. ChemistrySelect 2019. [DOI: 10.1002/slct.201902611] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Huu Manh Vu
- School of Chemical and Biological EngineeringUniversity of Science and Technology Beijing 30 Xueyuan Road, Haidian District Beijing 100083 PR China
| | - Fei‐Wu Chen
- School of Chemical and Biological EngineeringUniversity of Science and Technology Beijing 30 Xueyuan Road, Haidian District Beijing 100083 PR China
| | - Xu‐Qin Li
- School of Chemical and Biological EngineeringUniversity of Science and Technology Beijing 30 Xueyuan Road, Haidian District Beijing 100083 PR China
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10
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Bakthadoss M, Vijay Kumar P, Kumar R, Agarwal V. Palladium catalyzed chemo- and site-selective C-H acetoxylation and hydroxylation of oxobenzoxazine derivatives. Org Biomol Chem 2019; 17:4465-4469. [PMID: 31011718 DOI: 10.1039/c9ob00642g] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
An efficient protocol for the introduction of acetoxy and hydroxy functionalities on unactivated aryl sp2 carbons of oxobenzoxazine derivatives via an ortho-C-H activation reaction using a palladium catalyst has been developed for the first time. Interestingly, this intermolecular C-H functionalization reaction takes place in a facile and simple manner with high chemo- and site selectivity.
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Affiliation(s)
- Manickam Bakthadoss
- Department of Chemistry, Pondicherry University, Pondicherry - 605 014, India.
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11
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Xing L, Shao L, Fu X, Deng K, Yang J, Ji Y. Palladium-Catalyzed Thiazole-Directed mono-Selective C(sp2)-H Bond Iodination Reaction. CHINESE J ORG CHEM 2019. [DOI: 10.6023/cjoc201904062] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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Ni S, El Remaily MAEAAA, Franzén J. Carbocation Catalyzed Bromination of Alkyl Arenes, a Chemoselective
sp
3
vs. sp
2
C−H functionalization. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800788] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Shengjun Ni
- KTH, Royal Institute of TechnologySchool of Engineering Sciences in Chemistry, Biotechnology and Health, Department of Chemistry/Division of Organic Chemistry Teknikringen 30 SE-100 44 Stockholm Sweden
| | - Mahmoud Abd El Aleem Ali Ali El Remaily
- KTH, Royal Institute of TechnologySchool of Engineering Sciences in Chemistry, Biotechnology and Health, Department of Chemistry/Division of Organic Chemistry Teknikringen 30 SE-100 44 Stockholm Sweden
- Department of Chemistry, Faculty of ScienceSohag University 82524 Sohag Egypt
| | - Johan Franzén
- KTH, Royal Institute of TechnologySchool of Engineering Sciences in Chemistry, Biotechnology and Health, Department of Chemistry/Division of Organic Chemistry Teknikringen 30 SE-100 44 Stockholm Sweden
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13
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Singh H, Sen C, Sahoo T, Ghosh SC. A Visible Light-Mediated Regioselective Halogenation of Anilides and Quinolines by Using a Heterogeneous Cu-MnO Catalyst. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801097] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Harshvardhan Singh
- Natural Products and Green Chemistry Division; CSIR-Central Salt and Marine Chemicals Research Institute; G.B. Marg -364002 Bhavnagar Gujarat India
| | - Chiranjit Sen
- Natural Products and Green Chemistry Division; CSIR-Central Salt and Marine Chemicals Research Institute; G.B. Marg -364002 Bhavnagar Gujarat India
| | - Tapan Sahoo
- Natural Products and Green Chemistry Division; CSIR-Central Salt and Marine Chemicals Research Institute; G.B. Marg -364002 Bhavnagar Gujarat India
| | - Subhash Chandra Ghosh
- Natural Products and Green Chemistry Division; CSIR-Central Salt and Marine Chemicals Research Institute; G.B. Marg -364002 Bhavnagar Gujarat India
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14
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Das R, Kapur M. Transition-Metal-Catalyzed Site-Selective C−H Halogenation Reactions. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800142] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Riki Das
- Department of Chemistry; Indian Institute of Science Education and Research Bhopal; Bhopal Bypass Road Bhauri, Bhopal 462066 MP India
| | - Manmohan Kapur
- Department of Chemistry; Indian Institute of Science Education and Research Bhopal; Bhopal Bypass Road Bhauri, Bhopal 462066 MP India
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15
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Huang B, Ma L, Qiu G. One-pot synthesis of 2-(quinoxalin-2-yl)benzoate through NBS-mediated sequential reaction of 2-alkynylbenozate and aryl-1,2-diamine. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.04.063] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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16
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Pipaliya BV, Chakraborti AK. Cross-Dehydrogenative Coupling of Heterocyclic Scaffolds with Unfunctionalized Aroyl Surrogates by Palladium(II) Catalyzed C(sp2)-H Aroylation through Organocatalytic Dioxygen Activation. J Org Chem 2017; 82:3767-3780. [DOI: 10.1021/acs.joc.7b00226] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Bhavin V. Pipaliya
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Sector
67, S. A. S. Nagar, Punjab 160 062, India
| | - Asit K. Chakraborti
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Sector
67, S. A. S. Nagar, Punjab 160 062, India
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17
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Das R, Kapur M. Palladium-Catalyzed, ortho-Selective C-H Halogenation of Benzyl Nitriles, Aryl Weinreb Amides, and Anilides. J Org Chem 2017; 82:1114-1126. [PMID: 28029050 DOI: 10.1021/acs.joc.6b02731] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A palladium-catalyzed, ortho-selective C-H halogenation methodology is reported herein. The highlight of the work is the highly selective C(sp2)-H functionalization of benzyl nitriles in the presence of activated C(sp3)-H bond, which results in good yields of the halogenated products with excellent regioselectivity. Along with benzyl nitriles, aryl Weinreb amides and anilides have been evaluated for the transformation using aprotic conditions. Mechanistic studies yield interesting aspects with respect to the pathway of the reaction and the directing group abilities.
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Affiliation(s)
- Riki Das
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) , Bhopal, Madhya Pradesh 462 066, India
| | - Manmohan Kapur
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) , Bhopal, Madhya Pradesh 462 066, India
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18
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Dabiri M, Farajinia Lehi N, Kazemi Movahed S, Khavasi HR. Pd-Catalyzed regioselective C–H halogenation of quinazolinones and benzoxazinones. Org Biomol Chem 2017; 15:6264-6268. [DOI: 10.1039/c7ob01534h] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A Pd-catalyzed ortho-selective halogenation of benzoxazinone and quinazolinone scaffolds has been described employing N-halosuccinimide via C–H bond activation.
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Affiliation(s)
- Minoo Dabiri
- Faculty of Chemistry
- Shahid Beheshti University
- Tehran 1983969411
- Islamic Republic of Iran
| | | | | | - Hamid Reza Khavasi
- Faculty of Chemistry
- Shahid Beheshti University
- Tehran 1983969411
- Islamic Republic of Iran
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19
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Yu KK, Guo Y, Hu YH, Xu Z, Liu HW, Liao DH, Ji YF. Palladium-Catalyzed Diversemono-Acyloxylation of 5-Alkyl-4-aryl-thiazole-2-carboxylates. ASIAN J ORG CHEM 2016. [DOI: 10.1002/ajoc.201600304] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Kun-Kun Yu
- School of Pharmacy; East China University of Science & Technology; 130 Meilong Road Shanghai 200237 P. R. China
| | - Ying Guo
- School of Pharmacy; East China University of Science & Technology; 130 Meilong Road Shanghai 200237 P. R. China
| | - Ya-Hua Hu
- School of Pharmacy; East China University of Science & Technology; 130 Meilong Road Shanghai 200237 P. R. China
| | - Zhi Xu
- School of Pharmacy; East China University of Science & Technology; 130 Meilong Road Shanghai 200237 P. R. China
| | - Hong-Wei Liu
- School of Pharmacy; East China University of Science & Technology; 130 Meilong Road Shanghai 200237 P. R. China
| | - Dao-Hua Liao
- School of Pharmacy; East China University of Science & Technology; 130 Meilong Road Shanghai 200237 P. R. China
| | - Ya-Fei Ji
- School of Pharmacy; East China University of Science & Technology; 130 Meilong Road Shanghai 200237 P. R. China
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20
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Chen CY, Senadi GC, Liu MC, Wang JJ. Halogenation of Arenes via an In situ Generated Hypohalous Acid from m
-CPBA and HX: Mechanistic Insights from Cyclic Voltammetry. ChemistrySelect 2016. [DOI: 10.1002/slct.201600534] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Chung-Yu Chen
- Department of Medicinal and Applied Chemistry; Kaohsiung Medical University, 100; Shih-Chuan 1st Road Kaohsiung 80708 Taiwan,
| | - Gopal Chandru Senadi
- Department of Medicinal and Applied Chemistry; Kaohsiung Medical University, 100; Shih-Chuan 1st Road Kaohsiung 80708 Taiwan,
| | - Mei-Chun Liu
- Department of Medicinal and Applied Chemistry; Kaohsiung Medical University, 100; Shih-Chuan 1st Road Kaohsiung 80708 Taiwan,
| | - Jeh-Jeng Wang
- Department of Medicinal and Applied Chemistry; Kaohsiung Medical University, 100; Shih-Chuan 1st Road Kaohsiung 80708 Taiwan,
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21
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Santra SK, Banerjee A, Mohanta PR, Patel BK. Peroxide-Free Pd(II)-Catalyzed Ortho Aroylation and Ortho Halogenation of Directing Arenes. J Org Chem 2016; 81:6066-74. [DOI: 10.1021/acs.joc.6b01170] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Sourav Kumar Santra
- Department
of Chemistry, Indian Institute of Technology, Guwahati 781 039, Assam, India
| | - Arghya Banerjee
- Department
of Chemistry, Indian Institute of Technology, Guwahati 781 039, Assam, India
| | | | - Bhisma K. Patel
- Department
of Chemistry, Indian Institute of Technology, Guwahati 781 039, Assam, India
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22
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Ranjan Mohanta P, Banerjee A, Kumar Santra S, Behera A, Patel BK. Acylperoxycoumarins asortho-CH Acylating Agentviaa Palladium(II)-Catalyzed Redox-Neutral Process. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600258] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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23
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Moghaddam FM, Tavakoli G, Saeednia B, Langer P, Jafari B. Palladium-Catalyzed Carbamate-Directed Regioselective Halogenation: A Route to Halogenated Anilines. J Org Chem 2016; 81:3868-76. [PMID: 27072283 DOI: 10.1021/acs.joc.6b00329] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This study describes an efficient method for ortho-selective halogenation of N-arylcarbamates under mild conditions for the first time. Although being weakly coordinating, N-arylcarbamates act very well as a removable directing group for activation of C-H bonds. The developed procedure results in extremely valuable halogenated N-arylcarbmates that can further be hydrolyzed to halogenated anilines. The obtained reaction conditions showed broad scope and wide functional group tolerance. All the products were formed in good yields with extremely high selectivity.
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Affiliation(s)
- Firouz Matloubi Moghaddam
- Laboratory of Organic Synthesis and Natural Products, Department of Chemistry, Sharif University of Technology , Azadi Street, 111559516 Tehran, Iran
| | - Ghazal Tavakoli
- Laboratory of Organic Synthesis and Natural Products, Department of Chemistry, Sharif University of Technology , Azadi Street, 111559516 Tehran, Iran
| | - Borna Saeednia
- Laboratory of Organic Synthesis and Natural Products, Department of Chemistry, Sharif University of Technology , Azadi Street, 111559516 Tehran, Iran
| | - Peter Langer
- Institut für Chemie, Universität Rostock , Albert-Einstein-Strasse 3a, 18059 Rostock, Germany
| | - Behzad Jafari
- Institut für Chemie, Universität Rostock , Albert-Einstein-Strasse 3a, 18059 Rostock, Germany
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24
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Pal P, Singh H, Panda AB, Ghosh SC. Heterogeneous Cu-MnO Catalyzed Monoselective ortho
-Halogenation of Aromatic C−H Bonds under Visible Light. ASIAN J ORG CHEM 2015. [DOI: 10.1002/ajoc.201500245] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Provas Pal
- Division Inorganic Materials and Catalysis Division and AcSIR; Central Salt and Marine Chemicals Research Institute (CSIR), G.B. Marg, Bhavnagar-; 364002 Gujarat India), Fax
| | - Harshvardhan Singh
- Division Inorganic Materials and Catalysis Division and AcSIR; Central Salt and Marine Chemicals Research Institute (CSIR), G.B. Marg, Bhavnagar-; 364002 Gujarat India), Fax
| | - Asit Baran Panda
- Division Inorganic Materials and Catalysis Division and AcSIR; Central Salt and Marine Chemicals Research Institute (CSIR), G.B. Marg, Bhavnagar-; 364002 Gujarat India), Fax
| | - Subhash Chandra Ghosh
- Division Inorganic Materials and Catalysis Division and AcSIR; Central Salt and Marine Chemicals Research Institute (CSIR), G.B. Marg, Bhavnagar-; 364002 Gujarat India), Fax
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25
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Behera A, Ali W, Guin S, Khatun N, Mohanta PR, Patel BK. Benzyl bromides as aroyl surrogates in substrate directed Pd catalysed o-aroylation. RSC Adv 2015. [DOI: 10.1039/c5ra03836g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An oxidative cross-coupling between directing substrates and benzyl bromides leading to o-aroylation has been achieved using TBHP/NMO, and Pd(ii).
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Affiliation(s)
- Ahalya Behera
- Department of Chemistry
- Indian Institute of Technology Guwahati
- India
| | - Wajid Ali
- Department of Chemistry
- Indian Institute of Technology Guwahati
- India
| | - Srimanta Guin
- Department of Chemistry
- Indian Institute of Technology Guwahati
- India
| | - Nilufa Khatun
- Department of Chemistry
- Indian Institute of Technology Guwahati
- India
| | | | - Bhisma K. Patel
- Department of Chemistry
- Indian Institute of Technology Guwahati
- India
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Dutta U, Deb A, Lupton DW, Maiti D. The regioselective iodination of quinolines, quinolones, pyridones, pyridines and uracil. Chem Commun (Camb) 2015; 51:17744-7. [DOI: 10.1039/c5cc07799k] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A radical based direct C–H iodination protocol for quinolines, quinolones, pyridones, pyridines, and uracil has been developed.
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Affiliation(s)
- Uttam Dutta
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai - 400076
- India
- IITB-Monash Research Academy
| | - Arghya Deb
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai - 400076
- India
| | - David W. Lupton
- IITB-Monash Research Academy
- Mumbai - 400076
- India
- School of Chemistry
- Monash University
| | - Debabrata Maiti
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai - 400076
- India
- IITB-Monash Research Academy
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