1
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Zhang G, Zhang Y, Li P, Zhou C, Wang M, Wang L. Metal-Free Synthesis of 2 H-Indazole Skeletons by Photochemistry or Thermochemistry. J Org Chem 2023; 88:12341-12356. [PMID: 37582245 DOI: 10.1021/acs.joc.3c01091] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/17/2023]
Abstract
A simple and tuned synthesis of a 2H-indazole skeleton under metal-free conditions was developed. Under visible-light irradiation at room temperature, 2-((aryl/alkyl/H)ethynyl))aryltriazenes reacted with arylsulfinic acids to afford 3-functionalized 2H-indazoles without extra photocatalyst via an electron donor-acceptor complex. In the presence of arylsulfinic acid, 2-(ethynyl)aryltriazenes underwent an intramolecular oxidation/cyclization to provide 2H-indazole-3-carbaldehydes at 50 °C in air.
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Affiliation(s)
- Gan Zhang
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education and Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
| | - Yicheng Zhang
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education and Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
| | - Pinhua Li
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education and Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
| | - Chao Zhou
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education and Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
| | - Min Wang
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education and Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
| | - Lei Wang
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education and Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
- Advanced Research Institute and School of Pharmaceutical Sciences, Taizhou University, Taizhou, Zhejiang 318000, P. R. China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Scienes, Shanghai 200032, P. R. China
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2
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Guariento S, Chesi M, Bellina F, Copelli D, Venturi L, Bua E, Moretti E, Ronchi P. New Ligandless C−H Activation Procedure for The Decoration of C‐3 Position of 1H‐Indazole Derivatives. ChemistrySelect 2023. [DOI: 10.1002/slct.202203916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Affiliation(s)
- Sara Guariento
- Chemistry Research and Drug Design Chiesi Farmaceutici S.p.A L.go Belloli 11/a 43122 Parma Italy
| | - Mattia Chesi
- Chemistry Research and Drug Design Chiesi Farmaceutici S.p.A L.go Belloli 11/a 43122 Parma Italy
| | - Fabio Bellina
- Dipartimento di Chimica e Chimica Industriale Università di Pisa Via Moruzzi 13 56124 Pisa Italy
| | - Diego Copelli
- GTD – Digital, Data & Modelling Chiesi Farmaceutici S.p.A L.go Belloli 11/a 43122 Parma Italy
| | - Luca Venturi
- Analytics and Early Formulation Department Chiesi Farmaceutici S.p.A L.go Belloli 11/a 43122 Parma Italy
| | - Emanuela Bua
- Food and Drug Department University of Parma Parco Area delle Scienze 27/A 43124 Parma PR Italy
| | - Elisa Moretti
- Analytics and Early Formulation Department Chiesi Farmaceutici S.p.A L.go Belloli 11/a 43122 Parma Italy
| | - Paolo Ronchi
- Chemistry Research and Drug Design Chiesi Farmaceutici S.p.A L.go Belloli 11/a 43122 Parma Italy
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3
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Mondal A, van Gemmeren M. Silver-Free C-H Activation: Strategic Approaches towards Realizing the Full Potential of C-H Activation in Sustainable Organic Synthesis. Angew Chem Int Ed Engl 2022; 61:e202210825. [PMID: 36062882 PMCID: PMC9828228 DOI: 10.1002/anie.202210825] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Indexed: 01/12/2023]
Abstract
The activation of carbon-hydrogen bonds is considered as one of the most attractive techniques in synthetic organic chemistry because it bears the potential to shorten synthetic routes as well as to produce complementary product scopes compared to traditional synthetic strategies. However, many current methods employ silver salts as additives, leading to stoichiometric metal waste and thereby preventing the full potential of C-H activation to be exploited. Therefore, the development of silver-free protocols has recently received increasing attention. Mechanistically, silver can serve various roles in C-H activation and thus, avoiding the use of silver requires different approaches based on the role it serves in a given process. In this Review, we present the comparison of silver-based and silver-free methods. Focusing on the strategic approaches to develop silver-free C-H activation, we provide the reader with the means to develop sustainable methods for C-H activation.
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Affiliation(s)
- Arup Mondal
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität MünsterCorrensstraße 3648149MünsterGermany
| | - Manuel van Gemmeren
- Otto-Diels-Institut für Organische ChemieChristian-Albrechts-Universität zu KielOtto-Hahn-Platz 424118KielGermany
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4
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Yang X, Wu C, Su W, Yu J. Mechanochemical C−X/C−H Functionalization: An Alternative Strategy Access to Pharmaceuticals. European J Org Chem 2022. [DOI: 10.1002/ejoc.202101440] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Xinjie Yang
- Zhejiang University of Technology Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals Chaowang Road 18# 310014 Hangzhou CHINA
| | - Chongyang Wu
- Zhejiang University of Technology Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals Chaowang Road 18# 310014 Hangzhou CHINA
| | - Weike Su
- Zhejiang University of Technology Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals Chaowang Road 18# 310014 Hangzhou CHINA
| | - Jingbo Yu
- Zhejiang University of Technology Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals Chaowang Road 18# 310014 Hangzhou CHINA
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5
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O'Sullivan L, Patel KV, Rowley BC, Brownsey DK, Gorobets E, Gelfand BS, Van Humbeck JF, Derksen DJ. Regioselective Synthesis of C3-Hydroxyarylated Pyrazoles. J Org Chem 2021; 87:846-854. [PMID: 34905376 DOI: 10.1021/acs.joc.1c02518] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Pyrazoles are ubiquitous structures in medicinal chemistry. We report the first regioselective route to C3-hydroxyarylated pyrazoles obtained through reaction of pyrazole N-oxides with arynes using mild conditions. Importantly, this method does not require the C4 and C5 positions of the pyrazole to be functionalized to observe regioselectivity. Using this method, we completed the synthesis of a recently reported JAK 1/2 inhibitor. Our synthesis produces the desired product in 4 steps from commercially available starting materials.
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Affiliation(s)
- Leonie O'Sullivan
- Department of Chemistry, University of Calgary, Calgary, T2N 1N4, AB, Canada
| | - Ketul V Patel
- Department of Chemistry, University of Calgary, Calgary, T2N 1N4, AB, Canada
| | - Ben C Rowley
- Department of Chemistry, University of Calgary, Calgary, T2N 1N4, AB, Canada
| | - Duncan K Brownsey
- Department of Chemistry, University of Calgary, Calgary, T2N 1N4, AB, Canada
| | - Evgueni Gorobets
- Department of Chemistry, University of Calgary, Calgary, T2N 1N4, AB, Canada
| | - Benjamin S Gelfand
- Department of Chemistry, University of Calgary, Calgary, T2N 1N4, AB, Canada
| | | | - Darren J Derksen
- Department of Chemistry, University of Calgary, Calgary, T2N 1N4, AB, Canada
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6
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Synthetic advances in C(sp2)-H/N–H arylation of pyrazole derivatives through activation/substitution. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132504] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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7
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Rhodium-catalyzed directed C–H functionalization of 2-arylindazoles with diazotized Meldrum's acid. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.122009] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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8
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Faarasse S, El Kazzouli S, Bourzikat O, Bourg S, Aci‐Sèche S, Bonnet P, Suzenet F, Guillaumet G. Palladium‐Catalyzed Regioselective C−H Arylation of 4‐Azaindazole at C3, C5 and C7 Positions. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202001421] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Soukaina Faarasse
- Institute of Organic and Analytical Chemistry University of Orleans, UMR CNRS 7311, BP 6759 45067 Orleans Cedex 2 France
- Euromed Research Centre, School of Engineering in Biomedical and Biotechnology Euromed University of Fes (UEMF) Route de Meknès 30000 Fez Morocco
| | - Saïd El Kazzouli
- Euromed Research Centre, School of Engineering in Biomedical and Biotechnology Euromed University of Fes (UEMF) Route de Meknès 30000 Fez Morocco
| | - Otmane Bourzikat
- Institute of Organic and Analytical Chemistry University of Orleans, UMR CNRS 7311, BP 6759 45067 Orleans Cedex 2 France
- Euromed Research Centre, School of Engineering in Biomedical and Biotechnology Euromed University of Fes (UEMF) Route de Meknès 30000 Fez Morocco
| | - Stéphane Bourg
- Institute of Organic and Analytical Chemistry University of Orleans, UMR CNRS 7311, BP 6759 45067 Orleans Cedex 2 France
| | - Samia Aci‐Sèche
- Institute of Organic and Analytical Chemistry University of Orleans, UMR CNRS 7311, BP 6759 45067 Orleans Cedex 2 France
| | - Pascal Bonnet
- Institute of Organic and Analytical Chemistry University of Orleans, UMR CNRS 7311, BP 6759 45067 Orleans Cedex 2 France
| | - Franck Suzenet
- Institute of Organic and Analytical Chemistry University of Orleans, UMR CNRS 7311, BP 6759 45067 Orleans Cedex 2 France
| | - Gérald Guillaumet
- Institute of Organic and Analytical Chemistry University of Orleans, UMR CNRS 7311, BP 6759 45067 Orleans Cedex 2 France
- Euromed Research Centre, School of Engineering in Biomedical and Biotechnology Euromed University of Fes (UEMF) Route de Meknès 30000 Fez Morocco
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9
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Affiliation(s)
| | - Anna Lee
- Department of Chemistry Jeonbuk National University Jeonju 54896 Republic of Korea
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10
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Hara N, Uemura N, Nakao Y. C2-Selective silylation of pyridines by a rhodium-aluminum complex. Chem Commun (Camb) 2021; 57:5957-5960. [PMID: 34023864 DOI: 10.1039/d1cc00278c] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
We have developed a C2-selective mono-silylation of a variety of pyridines using a Rh-Al complex. Both the site- and mono-selectivity are controlled via the pyridine coordination to the Lewis-acidic Al center prior to the activation of the pyridine C(2)-H bond at the proximal Rh center. A reaction mechanism is proposed based on several mechanistic studies, including the isolation of a (2-pyridyl)silylrhodium intermediate.
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Affiliation(s)
- Naofumi Hara
- Department of Material Chemistry, Institution Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
| | - Nao Uemura
- Department of Material Chemistry, Institution Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
| | - Yoshiaki Nakao
- Department of Material Chemistry, Institution Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
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11
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Beesu M, Mehta G. “Back‐to‐Front” Type Synthesis of Polyfunctionalized Indazoles: Nitromethane Mediated, Domino Benzannulation of o‐Chloropyrazolyl Ynones. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100170] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Mallesh Beesu
- School of Chemistry University of Hyderabad Hyderabad 500 046 India
| | - Goverdhan Mehta
- School of Chemistry University of Hyderabad Hyderabad 500 046 India
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12
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Ueda M, Yasui M, Hasegawa M, Konishi K, Takeda N. Dihalogenative Cyclization for the Synthesis of 4-Bromo-1-bromoalkyl-5-aryl/alkyl/alkenyl-pyrazoles. HETEROCYCLES 2021. [DOI: 10.3987/com-20-s(k)43] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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13
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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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14
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Gambouz K, Abbouchi AE, Nassiri S, Suzenet F, Bousmina M, Akssira M, Guillaumet G, El Kazzouli S. Palladium‐Catalyzed Oxidative Arylation of 1
H
‐Indazoles with Arenes. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001313] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Khadija Gambouz
- Laboratoire de Chimie Physique et Chimie Bioorganique URAC 22 FSTM Université Hassan II – Casablanca BP 146 28800 Mohammedia Morocco
- Institut de Chimie Organique et Analytique Université d'Orléans UMR CNRS 7311 BP 6759 Orléans cedex 2 54067 France
- Euromed Research Center Engineering School of Biomedical and Biotechnology Euromed University of Fes (UEMF) Route de Meknès 30000 Fes Morocco
| | - Abdelmoula El Abbouchi
- Institut de Chimie Organique et Analytique Université d'Orléans UMR CNRS 7311 BP 6759 Orléans cedex 2 54067 France
- Euromed Research Center Engineering School of Biomedical and Biotechnology Euromed University of Fes (UEMF) Route de Meknès 30000 Fes Morocco
| | - Sarah Nassiri
- Institut de Chimie Organique et Analytique Université d'Orléans UMR CNRS 7311 BP 6759 Orléans cedex 2 54067 France
- Euromed Research Center Engineering School of Biomedical and Biotechnology Euromed University of Fes (UEMF) Route de Meknès 30000 Fes Morocco
| | - Franck Suzenet
- Institut de Chimie Organique et Analytique Université d'Orléans UMR CNRS 7311 BP 6759 Orléans cedex 2 54067 France
| | - Mostapha Bousmina
- Euromed Research Center Engineering School of Biomedical and Biotechnology Euromed University of Fes (UEMF) Route de Meknès 30000 Fes Morocco
| | - Mohamed Akssira
- Laboratoire de Chimie Physique et Chimie Bioorganique URAC 22 FSTM Université Hassan II – Casablanca BP 146 28800 Mohammedia Morocco
| | - Gérald Guillaumet
- Institut de Chimie Organique et Analytique Université d'Orléans UMR CNRS 7311 BP 6759 Orléans cedex 2 54067 France
- Euromed Research Center Engineering School of Biomedical and Biotechnology Euromed University of Fes (UEMF) Route de Meknès 30000 Fes Morocco
| | - Saïd El Kazzouli
- Euromed Research Center Engineering School of Biomedical and Biotechnology Euromed University of Fes (UEMF) Route de Meknès 30000 Fes Morocco
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15
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Mostinski Y, Heynen GJJE, López-Alberca MP, Paul J, Miksche S, Radetzki S, Schaller D, Shanina E, Seyffarth C, Kolomeets Y, Ziebart N, de Schryver J, Oestreich S, Neuenschwander M, Roske Y, Heinemann U, Rademacher C, Volkamer A, von Kries JP, Birchmeier W, Nazaré M. From Pyrazolones to Azaindoles: Evolution of Active-Site SHP2 Inhibitors Based on Scaffold Hopping and Bioisosteric Replacement. J Med Chem 2020; 63:14780-14804. [PMID: 33210922 DOI: 10.1021/acs.jmedchem.0c01265] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The tyrosine phosphatase SHP2 controls the activity of pivotal signaling pathways, including MAPK, JAK-STAT, and PI3K-Akt. Aberrant SHP2 activity leads to uncontrolled cell proliferation, tumorigenesis, and metastasis. SHP2 signaling was recently linked to drug resistance against cancer medications such as MEK and BRAF inhibitors. In this work, we present the development of a novel class of azaindole SHP2 inhibitors. We applied scaffold hopping and bioisosteric replacement concepts to eliminate unwanted structural motifs and to improve the inhibitor characteristics of the previously reported pyrazolone SHP2 inhibitors. The most potent azaindole 45 inhibits SHP2 with an IC50 = 0.031 μM in an enzymatic assay and with an IC50 = 2.6 μM in human pancreas cells (HPAF-II). Evaluation in a series of cellular assays for metastasis and drug resistance demonstrated efficient SHP2 blockade. Finally, 45 inhibited proliferation of two cancer cell lines that are resistant to cancer drugs and diminished ERK signaling.
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Affiliation(s)
- Yelena Mostinski
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), Campus Berlin-Buch, Robert-Rössle-Str. 10, 13125 Berlin, Germany
| | - Guus J J E Heynen
- Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC), Campus Berlin-Buch, Robert-Rössle-Str. 10, 13125 Berlin, Germany
| | - Maria Pascual López-Alberca
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), Campus Berlin-Buch, Robert-Rössle-Str. 10, 13125 Berlin, Germany
| | - Jerome Paul
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), Campus Berlin-Buch, Robert-Rössle-Str. 10, 13125 Berlin, Germany
| | - Sandra Miksche
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), Campus Berlin-Buch, Robert-Rössle-Str. 10, 13125 Berlin, Germany
| | - Silke Radetzki
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), Campus Berlin-Buch, Robert-Rössle-Str. 10, 13125 Berlin, Germany
| | - David Schaller
- Charité-Universitätsmedizin Berlin, Charitéplatz 1, 10117 Berlin, Germany
| | - Elena Shanina
- Max-Planck-Institut für Kolloid- und Grenzflächenforschung, Am Mühlenberg, 1, 14476 Potsdam, Germany
| | - Carola Seyffarth
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), Campus Berlin-Buch, Robert-Rössle-Str. 10, 13125 Berlin, Germany
| | - Yuliya Kolomeets
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), Campus Berlin-Buch, Robert-Rössle-Str. 10, 13125 Berlin, Germany
| | - Nandor Ziebart
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), Campus Berlin-Buch, Robert-Rössle-Str. 10, 13125 Berlin, Germany
| | - Judith de Schryver
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), Campus Berlin-Buch, Robert-Rössle-Str. 10, 13125 Berlin, Germany
| | - Sylvia Oestreich
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), Campus Berlin-Buch, Robert-Rössle-Str. 10, 13125 Berlin, Germany
| | - Martin Neuenschwander
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), Campus Berlin-Buch, Robert-Rössle-Str. 10, 13125 Berlin, Germany
| | - Yvette Roske
- Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC), Campus Berlin-Buch, Robert-Rössle-Str. 10, 13125 Berlin, Germany
| | - Udo Heinemann
- Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC), Campus Berlin-Buch, Robert-Rössle-Str. 10, 13125 Berlin, Germany
| | - Christoph Rademacher
- Max-Planck-Institut für Kolloid- und Grenzflächenforschung, Am Mühlenberg, 1, 14476 Potsdam, Germany
| | - Andrea Volkamer
- Charité-Universitätsmedizin Berlin, Charitéplatz 1, 10117 Berlin, Germany
| | - Jens Peter von Kries
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), Campus Berlin-Buch, Robert-Rössle-Str. 10, 13125 Berlin, Germany
| | - Walter Birchmeier
- Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC), Campus Berlin-Buch, Robert-Rössle-Str. 10, 13125 Berlin, Germany
| | - Marc Nazaré
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), Campus Berlin-Buch, Robert-Rössle-Str. 10, 13125 Berlin, Germany
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16
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Song AX, Zeng XX, Ma BB, Xu C, Liu FS. Direct (Hetero)arylation of Heteroarenes Catalyzed by Unsymmetrical Pd-PEPPSI-NHC Complexes under Mild Conditions. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00494] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- A-Xiang Song
- School of Chemistry and Chemical Engineering, Guangdong Cosmetics Engineering & Technology Research Center, Guangdong Pharmaceutical University, Zhongshan, Guangdong 528458, People’s Republic of China
| | - Xiao-Xiao Zeng
- School of Chemistry and Chemical Engineering, Guangdong Cosmetics Engineering & Technology Research Center, Guangdong Pharmaceutical University, Zhongshan, Guangdong 528458, People’s Republic of China
| | - Bei-Bei Ma
- School of Chemistry and Chemical Engineering, Guangdong Cosmetics Engineering & Technology Research Center, Guangdong Pharmaceutical University, Zhongshan, Guangdong 528458, People’s Republic of China
| | - Chang Xu
- School of Chemistry and Chemical Engineering, Guangdong Cosmetics Engineering & Technology Research Center, Guangdong Pharmaceutical University, Zhongshan, Guangdong 528458, People’s Republic of China
| | - Feng-Shou Liu
- School of Chemistry and Chemical Engineering, Guangdong Cosmetics Engineering & Technology Research Center, Guangdong Pharmaceutical University, Zhongshan, Guangdong 528458, People’s Republic of China
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17
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Li J, Shi L, Zhang SP, Wang XY, Zhu X, Hao XQ, Song MP. Rh(III)-Catalyzed C-H Cyanation of 2 H-Indazole with N-Cyano- N-phenyl- p-toluenesulfonamide. J Org Chem 2020; 85:10835-10845. [PMID: 32692175 DOI: 10.1021/acs.joc.0c01386] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
A Rh(III)-catalyzed direct cyanation of 2H-indazoles with N-cyano-N-phenyl-p-toluenesulfonamide has been realized via a chelation-assisted strategy. The methodology enables regioselective access to various ortho-cyanated phenylindazoles in good yields with a broad substrate scope and good functional group compatibility. The obtained cyanated indazoles could further be converted into other value-added chemicals. Importantly, the current protocol is featured with several characteristics, including a novel cyanating agent, good regioselectivity, and operational convenience.
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Affiliation(s)
- Jing Li
- College of Chemistry, Zhengzhou University, No. 100 of Science Road, Zhengzhou, Henan 450001, P. R. China
| | - Linlin Shi
- College of Chemistry, Zhengzhou University, No. 100 of Science Road, Zhengzhou, Henan 450001, P. R. China
| | - Shu-Ping Zhang
- College of Chemistry, Zhengzhou University, No. 100 of Science Road, Zhengzhou, Henan 450001, P. R. China
| | - Xu-Yan Wang
- College of Chemistry, Zhengzhou University, No. 100 of Science Road, Zhengzhou, Henan 450001, P. R. China
| | - Xinju Zhu
- College of Chemistry, Zhengzhou University, No. 100 of Science Road, Zhengzhou, Henan 450001, P. R. China
| | - Xin-Qi Hao
- College of Chemistry, Zhengzhou University, No. 100 of Science Road, Zhengzhou, Henan 450001, P. R. China
| | - Mao-Ping Song
- College of Chemistry, Zhengzhou University, No. 100 of Science Road, Zhengzhou, Henan 450001, P. R. China
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18
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Ghosh S, Mondal S, Hajra A. Direct Catalytic Functionalization of Indazole Derivatives. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000423] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Sumit Ghosh
- Department of Chemistry Visva-Bharati (A Central University) Santiniketan 731235 India
| | - Susmita Mondal
- 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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19
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Gambouz K, El Abbouchi A, Nassiri S, Suzenet F, Bousmina M, Akssira M, Guillaumet G, El Kazzouli S. "On Water" Palladium Catalyzed Direct Arylation of 1 H-Indazole and 1 H-7-Azaindazole. Molecules 2020; 25:molecules25122820. [PMID: 32570894 PMCID: PMC7356112 DOI: 10.3390/molecules25122820] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 06/14/2020] [Accepted: 06/16/2020] [Indexed: 11/16/2022] Open
Abstract
The C3 direct arylation of 1H-indazole and 1H-7-azaindazole has been a significant challenge due to the lack of the reactivity at this position. In this paper, we describe a mild and an efficient synthesis of new series of C3-aryled 1H-indazoles and C3-aryled 1H-7-azaindazoles via a C3 direct arylation using water as solvent. On water, PPh3 was effective as a ligand along with a lower charge of the catalyst Pd(OAc)2 (5 mol%) at 100 °C, leading to C3-aryled 1H-indazoles or C3-aryled 1H-7-azaindazoles in moderate to good yields.
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Affiliation(s)
- Khadija Gambouz
- Faculty of Sciences and Technologies Mohammedia, University Hassan 2, URAC 22 FSTM University Hassan II—Casablanca, BP 146, Mohammedia 28800, Morocco; (K.G.); (M.A.)
- Institut de Chimie Organique et Analytique, University of Orléans, UMR CNRS 7311, BP 6759, CEDEX 2, 54067 Orléans, France; (A.E.A.); (S.N.); (F.S.)
- Euromed Research Center, Euromed Institute of Technology, Euromed University of Fes (UEMF), Route de Meknès, Rond-point de Bensouda, Fes 30000, Morocco;
| | - Abdelmoula El Abbouchi
- Institut de Chimie Organique et Analytique, University of Orléans, UMR CNRS 7311, BP 6759, CEDEX 2, 54067 Orléans, France; (A.E.A.); (S.N.); (F.S.)
- Euromed Research Center, Euromed Institute of Technology, Euromed University of Fes (UEMF), Route de Meknès, Rond-point de Bensouda, Fes 30000, Morocco;
| | - Sarah Nassiri
- Institut de Chimie Organique et Analytique, University of Orléans, UMR CNRS 7311, BP 6759, CEDEX 2, 54067 Orléans, France; (A.E.A.); (S.N.); (F.S.)
- Euromed Research Center, Euromed Institute of Technology, Euromed University of Fes (UEMF), Route de Meknès, Rond-point de Bensouda, Fes 30000, Morocco;
| | - Franck Suzenet
- Institut de Chimie Organique et Analytique, University of Orléans, UMR CNRS 7311, BP 6759, CEDEX 2, 54067 Orléans, France; (A.E.A.); (S.N.); (F.S.)
| | - Mostapha Bousmina
- Euromed Research Center, Euromed Institute of Technology, Euromed University of Fes (UEMF), Route de Meknès, Rond-point de Bensouda, Fes 30000, Morocco;
| | - Mohamed Akssira
- Faculty of Sciences and Technologies Mohammedia, University Hassan 2, URAC 22 FSTM University Hassan II—Casablanca, BP 146, Mohammedia 28800, Morocco; (K.G.); (M.A.)
| | - Gérald Guillaumet
- Institut de Chimie Organique et Analytique, University of Orléans, UMR CNRS 7311, BP 6759, CEDEX 2, 54067 Orléans, France; (A.E.A.); (S.N.); (F.S.)
- Euromed Research Center, Euromed Institute of Technology, Euromed University of Fes (UEMF), Route de Meknès, Rond-point de Bensouda, Fes 30000, Morocco;
- Correspondence: (G.G.); (S.E.K.); Tel.: +212-6612-99-565 (S.E.K.)
| | - Saïd El Kazzouli
- Euromed Research Center, Euromed Institute of Technology, Euromed University of Fes (UEMF), Route de Meknès, Rond-point de Bensouda, Fes 30000, Morocco;
- Correspondence: (G.G.); (S.E.K.); Tel.: +212-6612-99-565 (S.E.K.)
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20
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Wang R, Ding T, Jiang L, He W, Yi W. Fluoromethoxymethylation of Nitrogen Heterocyclic Compounds with Fluoromethyl Iodide. J Org Chem 2020; 85:3993-4001. [PMID: 31913626 DOI: 10.1021/acs.joc.9b03193] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The fluoromethoxymethylation of nitrogen heterocyclic compounds with fluoromethyl iodide has been reported for the first time. In this reaction, a number of unexplored fluoromethoxymethylated nitrogen heterocyclic compounds including indoles, carbazoles, and 1H-indazoles were efficiently formed. Mechanistic studies indicated that this transformation consists of electrophilic monofluoromethylation, rapid hydrolysis, and another electrophilic monofluoromethylation. This method makes it possible to synthesize complex bioactive molecules containing a CH2OCH2F group, which have the potential to be a new series of fluorine-containing chemical entities for medicinal chemists.
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Affiliation(s)
- Rongkang Wang
- College of Chemical Engineering, Nanjing University of Science & Technology 200 Xiaolingwei, Nanjing 210094, P. R. China
| | - Tianqi Ding
- College of Chemical Engineering, Nanjing University of Science & Technology 200 Xiaolingwei, Nanjing 210094, P. R. China
| | - Lvqi Jiang
- College of Chemical Engineering, Nanjing University of Science & Technology 200 Xiaolingwei, Nanjing 210094, P. R. China
| | - Wujuan He
- College of Chemical Engineering, Nanjing University of Science & Technology 200 Xiaolingwei, Nanjing 210094, P. R. China
| | - Wenbin Yi
- College of Chemical Engineering, Nanjing University of Science & Technology 200 Xiaolingwei, Nanjing 210094, P. R. China
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21
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Kang E, Kim HT, Joo JM. Transition-metal-catalyzed C–H functionalization of pyrazoles. Org Biomol Chem 2020; 18:6192-6210. [DOI: 10.1039/d0ob01265c] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
This review describes recent advances in transition-metal-catalyzed C–H functionalization reactions of pyrazoles to form new C–C and C–heteroatom bonds on the pyrazole ring.
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Affiliation(s)
- Eunsu Kang
- Department of Chemistry and Chemistry Institute for Functional Materials
- Pusan National University
- Busan 46241
- Republic of Korea
| | - Hyun Tae Kim
- Department of Chemistry and Chemistry Institute for Functional Materials
- Pusan National University
- Busan 46241
- Republic of Korea
| | - Jung Min Joo
- Department of Chemistry and Chemistry Institute for Functional Materials
- Pusan National University
- Busan 46241
- Republic of Korea
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22
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Worob A, Wenthur C. DARK Classics in Chemical Neuroscience: Synthetic Cannabinoids (Spice/K2). ACS Chem Neurosci 2019; 11:3881-3892. [PMID: 31799831 DOI: 10.1021/acschemneuro.9b00586] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
This Review covers the background, pharmacology, adverse effects, synthesis, pharmacokinetics, metabolism, and history of synthetic cannabinoid compounds. Synthetic cannabinoids are a class of novel psychoactive substances that act as agonists at cannabinoid receptors. This class of compounds is structurally diverse and rapidly changing, with multiple generations of molecules having been developed in the past decade. The structural diversity of synthetic cannabinoids is supported by the breadth of chemical space available for exploitation by clandestine chemists and incentivized by attempts to remain ahead of legal pressures. As a class, synthetic cannabinoid products have a more serious adverse effect profile than that of traditional phytocannabinoids, including notable risks of lethality, as well as a history of dangerous adulteration. Most synthetic cannabinoids are rapidly metabolized to active species with prolonged residence times and peripheral tissue distribution, and analytical confirmation of use of these compounds remains challenging. Overall, the emergence of synthetic cannabinoids serves as a noteworthy example of the pressing public health challenges associated with the increasing development of easily synthesized, structurally flexible, highly potent, psychoactive drugs.
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Affiliation(s)
- Adam Worob
- Divisions of Pharmaceutical Sciences and Pharmacy Practice, School of Pharmacy, University of Wisconsin—Madison, Madison, Wisconsin 53705, United States
| | - Cody Wenthur
- Divisions of Pharmaceutical Sciences and Pharmacy Practice, School of Pharmacy, University of Wisconsin—Madison, Madison, Wisconsin 53705, United States
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23
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Yu J, Yang X, Wu C, Su W. Palladium-Catalyzed C–H/C–H Cross-Coupling by Mechanochemistry: Direct Alkenylation and Heteroarylation of N1-Protected 1H-Indazoles. J Org Chem 2019; 85:1009-1021. [DOI: 10.1021/acs.joc.9b02951] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jingbo Yu
- National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, P.R. China
| | - Xinjie Yang
- National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, P.R. China
| | - Chongyang Wu
- National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, P.R. China
| | - Weike Su
- National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, P.R. China
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24
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Aganda KCC, Kim J, Lee A. Visible-light-mediated direct C3-arylation of 2H-indazoles enabled by an electron-donor-acceptor complex. Org Biomol Chem 2019; 17:9698-9702. [PMID: 31696189 DOI: 10.1039/c9ob02074h] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A mild visible-light-mediated, photocatalyst-free arylation of 2H-indazoles was developed. The formation of an electron donor-acceptor complex by 2H-indazoles and aryl diazonium salts in the presence of pyridine allows the direct arylation of 2H-indazoles under visible-light irradiation. This process provides an efficient route for the synthesis of C3-arylated-2H-indazoles, which are important scaffolds of various bioactive compounds.
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Affiliation(s)
- Kim Christopher C Aganda
- Department of Energy Science and Technology, Myongji University, Yongin, 17058, Republic of Korea
| | - Junyoung Kim
- Department of Chemistry, Myongji University, Yongin 17058, Republic of Korea.
| | - Anna Lee
- Department of Energy Science and Technology, Myongji University, Yongin, 17058, Republic of Korea and Department of Chemistry, Myongji University, Yongin 17058, Republic of Korea.
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25
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Vidyacharan S, Ramanjaneyulu BT, Jang S, Kim DP. Continuous-Flow Visible Light Organophotocatalysis for Direct Arylation of 2H-Indazoles: Fast Access to Drug Molecules. CHEMSUSCHEM 2019; 12:2581-2586. [PMID: 30985985 DOI: 10.1002/cssc.201900736] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 04/09/2019] [Indexed: 06/09/2023]
Abstract
A continuous-flow homogeneous photocatalytic method has been devised for the direct arylation of 2H-indazoles. This visible-light-promoted approach directly accesses a wide range of structurally diverse C3-arylated scaffolds of biological interest in a fast (1 min), single-step reaction by using eosin Y as an organophotocatalyst. Furthermore, a microreactor technology is also employed for the fast synthesis of liver X receptor inhibitor drugs with very good yields under metal-free conditions, whereas the reported methods required multiple steps and much longer reaction times (18-24 h).
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Affiliation(s)
- Shinde Vidyacharan
- Center of Intelligent Microprocess of Pharmaceutical Synthesis, Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), 37673, Pohang, Korea
| | - Bandaru T Ramanjaneyulu
- Center of Intelligent Microprocess of Pharmaceutical Synthesis, Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), 37673, Pohang, Korea
| | - Seungwook Jang
- Center of Intelligent Microprocess of Pharmaceutical Synthesis, Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), 37673, Pohang, Korea
| | - Dong-Pyo Kim
- Center of Intelligent Microprocess of Pharmaceutical Synthesis, Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), 37673, Pohang, Korea
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26
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Dhole S, Chiu W, Sun C. Catalyst‐Controlled Chemodivergent Annulation to Indolo/Pyrrolo‐Fused Diazepine and Quinoxaline. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900088] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Sandip Dhole
- Department of Applied ChemistryNational Chiao Tung University Hsinchu 300-10 Taiwan
- Department of Chemistry, Chandmal Tarachand Bora CollegeUniversity of Pune, Maharashtra 412210 India
| | - Wei‐Jung Chiu
- Department of Applied ChemistryNational Chiao Tung University Hsinchu 300-10 Taiwan
| | - Chung‐Ming Sun
- Department of Applied ChemistryNational Chiao Tung University Hsinchu 300-10 Taiwan
- Department of Medicinal and Applied ChemistryKaohsiung Medical University 100, Shih-Chuan 1st Road Kaohsiung 807-08 Taiwan
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27
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Cycloaddition of hydrazones and 1, 2-diarylalkynes promoted by t-BuOK/DMF: A convenient synthesis of tetraarylpyrazoles. CHINESE CHEM LETT 2019. [DOI: 10.1016/j.cclet.2018.06.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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28
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Faarasse S, El Kazzouli S, Suzenet F, Guillaumet G. Palladium-Catalyzed C3-Arylations of 1H- and 2H-Pyrazolo[4,3-b]pyridines on Water. J Org Chem 2018; 83:12847-12854. [PMID: 30240222 DOI: 10.1021/acs.joc.8b01728] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Soukaina Faarasse
- Euromed Faculty of Engineering, Euromed University of Fes (UEMF), Route de Meknès, 30000 Fès, Morocco
- Institut de Chimie Organique et Analytique (ICOA), Université d’Orléans, UMR CNRS 7311, BP 6759, 45067 Orléans Cedex 2, France
| | - Saïd El Kazzouli
- Euromed Faculty of Engineering, Euromed University of Fes (UEMF), Route de Meknès, 30000 Fès, Morocco
| | - Franck Suzenet
- Institut de Chimie Organique et Analytique (ICOA), Université d’Orléans, UMR CNRS 7311, BP 6759, 45067 Orléans Cedex 2, France
| | - Gérald Guillaumet
- Institut de Chimie Organique et Analytique (ICOA), Université d’Orléans, UMR CNRS 7311, BP 6759, 45067 Orléans Cedex 2, France
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29
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Pati TK, Debnath S, Kundu M, Khamrai U, Maiti DK. 3-Amino-1-methyl-1H-pyridin-2-one-Directed PdII Catalysis: C(sp3)–H Activated Diverse Arylation Reaction. Org Lett 2018; 20:4062-4066. [DOI: 10.1021/acs.orglett.8b01618] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Tanmay K. Pati
- Department of Chemistry, University of Calcutta, 92 APC Road, Kolkata 700009, India
- TCG Lifesciences Private Limited, Sector V, Salt Lake City, Kolkata 700091, India
| | - Sudipto Debnath
- Department of Chemistry, University of Calcutta, 92 APC Road, Kolkata 700009, India
| | - Mrinalkanti Kundu
- TCG Lifesciences Private Limited, Sector V, Salt Lake City, Kolkata 700091, India
| | - Uttam Khamrai
- TCG Lifesciences Private Limited, Sector V, Salt Lake City, Kolkata 700091, India
| | - Dilip K. Maiti
- Department of Chemistry, University of Calcutta, 92 APC Road, Kolkata 700009, India
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30
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Zhan Y, Ding X, Wang H, Yu H, Ren F. A mild and efficient THP protection of indazoles and benzyl alcohols in water. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.02.061] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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31
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Ning Y, Kawahata M, Yamaguchi K, Otani Y, Ohwada T. Synthesis, structure and N-N bonding character of 1,1-disubstituted indazolium hexafluorophosphate. Chem Commun (Camb) 2018; 54:1881-1884. [PMID: 29392251 DOI: 10.1039/c8cc00183a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
1,1-Disubstituted indazolium hexafluorophosphates were synthesized via intramolecular electrophilic amination reactions under mild conditions. The crystal structures were determined and are consistent with the presence of a stable N-N bond, which can be cleaved by hydrogenation. Both experimental and computational studies suggest a covalent bonding character of the N-N bond, with diminished aromaticity of the newly formed pyrazolium ring due to the quaternary ammonium atom (N1), in contrast to the aromatic character of the parent indazole.
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Affiliation(s)
- Yingtang Ning
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
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32
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Motati DR, Uredi D, Watkins EB. A general method for the metal-free, regioselective, remote C-H halogenation of 8-substituted quinolines. Chem Sci 2018; 9:1782-1788. [PMID: 29675222 PMCID: PMC5892134 DOI: 10.1039/c7sc04107a] [Citation(s) in RCA: 93] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Accepted: 01/02/2018] [Indexed: 11/27/2022] Open
Abstract
An operationally simple, metal-free protocol for regioselective halogenation of a range of 8-substituted quinolines has been established using recyclable trihaloisocyanuric acids.
An operationally simple and metal-free protocol for geometrically inaccessible C5–H halogenation of a range of 8-substituted quinoline derivatives has been established. The reaction proceeds under air, with inexpensive and atom economical trihaloisocyanuric acid as a halogen source (only 0.36 equiv.), at room temperature. Exceptionally high generality with respect to quinoline is observed, and in most instances, the reaction proceeded with complete regioselectivity. Quinoline with a variety of substituents at the 8-position gave, exclusively, the C5-halogenated product in good to excellent yields. Phosphoramidates, tertiary amides, N-alkyl/N,N-dialkyl, and urea derivatives of quinolin-8-amine as well as alkoxy quinolines were halogenated at the C5-position via remote functionalization for the first time. This methodology provides a highly economical route to halogenated quinolines with excellent functional group tolerance, thus providing a good complement to existing remote functionalization methods of quinolin-8-amide derivatives and broadening the field of remote functionalization. The utility of the method is further showcased through the synthesis of several compounds of biological and pharmaceutical interest.
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Affiliation(s)
- Damoder Reddy Motati
- Department of Pharmaceutical Sciences , College of Pharmacy , Union University , Jackson , Tennessee , 38305 USA . ;
| | - Dilipkumar Uredi
- Department of Pharmaceutical Sciences , College of Pharmacy , Union University , Jackson , Tennessee , 38305 USA . ;
| | - E Blake Watkins
- Department of Pharmaceutical Sciences , College of Pharmacy , Union University , Jackson , Tennessee , 38305 USA . ;
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33
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Urvashi U, Tandon V, Das P, Kukreti S. Synthesis of 3,6-diaryl-1H-pyrazolo[3,4-b]pyridines via one-pot sequential Suzuki–Miyaura coupling. RSC Adv 2018; 8:34883-34894. [PMID: 35547054 PMCID: PMC9087644 DOI: 10.1039/c8ra07104g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2018] [Accepted: 09/13/2018] [Indexed: 01/15/2023] Open
Abstract
A practical synthesis of diarylpyrazolo[3,4-b]pyridine derivatives by a combination of chemoselective Suzuki–Miyaura cross-coupling reactions was developed. The sequential arylation strategy can be performed in a one-pot manner without much loss of efficiency when compared to the corresponding stepwise synthesis. These conditions are applicable to the coupling of a wide variety of aryl and heteroaryl-boronic acids with pyrazolo[3,4-b]pyridines with high selectivity of the C3 over the C6 position, thus enabling the rapid construction of a diverse array of medicinally important diarylpyrazolo[3,4-b]pyridines. An efficient method to produce diarylpyrazolo[3,4-b]pyridines derivatives via combination of chemoselective Suzuki–Miyaura cross-coupling reactions has been developed.![]()
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Affiliation(s)
| | - Vibha Tandon
- Special Centre for Molecular Medicine
- Jawaharlal Nehru University
- New Delhi-110067
- India
| | - Parthasarathi Das
- Department of Applied Chemistry
- Indian Institute of Technology (Indian School of Mines)
- Dhanbad-826004
- India
| | - S. Kukreti
- Department of Chemistry
- University of Delhi
- Delhi-110007
- India
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34
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35
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Faarasse S, El Kazzouli S, Naas M, Jouha J, Suzenet F, Guillaumet G. “On Water” Direct C-3 Arylation of 2H-Pyrazolo[3,4-b]pyridines. J Org Chem 2017; 82:12300-12306. [DOI: 10.1021/acs.joc.7b02136] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Soukaina Faarasse
- Euromed
Faculty of Engineering, Euromed University of Fes (UEMF), Route
de Meknès, 30000 Fès, Morocco
- Institut
de Chimie Organique et Analytique (ICOA), Université d’Orléans, UMR CNRS, 7311 BP 6759, 45067 Orléans Cedex 2, France
| | - Saïd El Kazzouli
- Euromed
Faculty of Engineering, Euromed University of Fes (UEMF), Route
de Meknès, 30000 Fès, Morocco
| | - Mohammed Naas
- Institut
de Chimie Organique et Analytique (ICOA), Université d’Orléans, UMR CNRS, 7311 BP 6759, 45067 Orléans Cedex 2, France
| | - Jabrane Jouha
- Institut
de Chimie Organique et Analytique (ICOA), Université d’Orléans, UMR CNRS, 7311 BP 6759, 45067 Orléans Cedex 2, France
| | - Franck Suzenet
- Institut
de Chimie Organique et Analytique (ICOA), Université d’Orléans, UMR CNRS, 7311 BP 6759, 45067 Orléans Cedex 2, France
| | - Gérald Guillaumet
- Institut
de Chimie Organique et Analytique (ICOA), Université d’Orléans, UMR CNRS, 7311 BP 6759, 45067 Orléans Cedex 2, France
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36
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Oh KH, Kim JG, Park JK. A Modular Synthesis of 4-Aminoquinolines and [1,3] N-to-C Rearrangement to Quinolin-4-ylmethanesulfonamides. Org Lett 2017; 19:3994-3997. [DOI: 10.1021/acs.orglett.7b01701] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Kyung Hwan Oh
- Department of Chemistry and
Chemistry Institute of Functional Materials, Pusan National University, Busan 609-735, Korea
| | - Jin Gyeong Kim
- Department of Chemistry and
Chemistry Institute of Functional Materials, Pusan National University, Busan 609-735, Korea
| | - Jin Kyoon Park
- Department of Chemistry and
Chemistry Institute of Functional Materials, Pusan National University, Busan 609-735, Korea
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37
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Zhang S, Niu YH, Ye XS. General Approach to Five-Membered Nitrogen Heteroaryl C-Glycosides Using a Palladium/Copper Cocatalyzed C–H Functionalization Strategy. Org Lett 2017; 19:3608-3611. [DOI: 10.1021/acs.orglett.7b01583] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Shuo Zhang
- State Key Laboratory of Natural and Biomimetic
Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing 100191, China
| | - You-Hong Niu
- State Key Laboratory of Natural and Biomimetic
Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing 100191, China
| | - Xin-Shan Ye
- State Key Laboratory of Natural and Biomimetic
Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road No. 38, Beijing 100191, China
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38
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Murugan A, Vidyacharan S, Ghosh R, Sharada DS. Metal-Free Regioselective Dual C-H Functionalization in a Cascade Fashion: Access to Isocryptolepine Alkaloid Analogues. ChemistrySelect 2017. [DOI: 10.1002/slct.201700263] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Arumugavel Murugan
- Department of Chemistry; Indian Institute of Technology Hyderabad; Kandi Sangareddy-502 285, Telangana INDIA
| | - Shinde Vidyacharan
- Department of Chemistry; Indian Institute of Technology Hyderabad; Kandi Sangareddy-502 285, Telangana INDIA
| | - Ruma Ghosh
- Department of Chemistry; Indian Institute of Technology Hyderabad; Kandi Sangareddy-502 285, Telangana INDIA
| | - Duddu S. Sharada
- Department of Chemistry; Indian Institute of Technology Hyderabad; Kandi Sangareddy-502 285, Telangana INDIA
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39
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Yamaguchi J, Itami K. Toward an Ideal Synthesis of (Bio)molecules through Direct Arene Assembling Reactions. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2017. [DOI: 10.1246/bcsj.20160365] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Junichiro Yamaguchi
- Department of Applied Chemistry, Waseda University, Shinjuku, Tokyo 169-8555
| | - Kenichiro Itami
- Institute of Transformative Bio-Molecules (WPI-ITbM) and Graduate School of Science, Nagoya University, Chikusa, Nagoya, Aichi 464-8602
- JST-ERATO, Itami Molecular Nanocarbon Project, Nagoya University, Chikusa, Nagoya, Aichi 464-8602
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40
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Dey A, Pimparkar S, Deb A, Guin S, Maiti D. Chelation-Assisted Palladium-Catalyzed γ-Arylation of Aliphatic Carboxylic Acid Derivatives. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201601121] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Aniruddha Dey
- Department of Chemistry; Indian Institute of Technology Bombay, Powai; Mumbai - 400 076 India
| | - Sandeep Pimparkar
- Department of Chemistry; Indian Institute of Technology Bombay, Powai; Mumbai - 400 076 India
| | - Arghya Deb
- Department of Chemistry; Indian Institute of Technology Bombay, Powai; Mumbai - 400 076 India
| | - Srimanta Guin
- Department of Chemistry; Indian Institute of Technology Bombay, Powai; Mumbai - 400 076 India
| | - Debabrata Maiti
- Department of Chemistry; Indian Institute of Technology Bombay, Powai; Mumbai - 400 076 India
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41
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Chen FM, Huang FD, Yao XY, Li T, Liu FS. Direct C–H heteroarylation by an acenaphthyl-based α-diimine palladium complex: improvement of the reaction efficiency for bi(hetero)aryls under aerobic conditions. Org Chem Front 2017. [DOI: 10.1039/c7qo00562h] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A bulky ancenaphthyl skeleton-based α-diimine palladium complex has been developed, which exhibited high reactivity for direct heteroarylation of heteroaryl bromides under aerobic conditions with a broad substrate scope.
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Affiliation(s)
- Fu-Min Chen
- School of Chemistry and Chemical Engineering
- Guangdong Cosmetics Engineering and Technology Research Center
- Guangdong Pharmaceutical University
- Zhongshan
- China
| | - Fei-Dong Huang
- School of Chemistry and Chemical Engineering
- Guangdong Cosmetics Engineering and Technology Research Center
- Guangdong Pharmaceutical University
- Zhongshan
- China
| | - Xue-Yi Yao
- School of Chemistry and Chemical Engineering
- Guangdong Cosmetics Engineering and Technology Research Center
- Guangdong Pharmaceutical University
- Zhongshan
- China
| | - Tian Li
- School of Chemistry and Chemical Engineering
- Guangdong Cosmetics Engineering and Technology Research Center
- Guangdong Pharmaceutical University
- Zhongshan
- China
| | - Feng-Shou Liu
- School of Chemistry and Chemical Engineering
- Guangdong Cosmetics Engineering and Technology Research Center
- Guangdong Pharmaceutical University
- Zhongshan
- China
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42
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Palaniraja J, Mohana Roopan S, Mokesh Rayalu G, Abdullah Al-Dhabi N, Valan Arasu M. A Metal-Free Regioselective Multicomponent Approach for the Synthesis of Free Radical Scavenging Pyrimido-Fused Indazoles and Their Fluorescence Studies. Molecules 2016; 21:molecules21111571. [PMID: 27869743 PMCID: PMC6273232 DOI: 10.3390/molecules21111571] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Revised: 11/08/2016] [Accepted: 11/11/2016] [Indexed: 11/27/2022] Open
Abstract
This study deals with a new and efficient metal-free regioselective synthesis of pyrimido-fused indazoles with nitrogen ring junction motifs. We have developed a metal-free domino type reaction between 3-aminoindazole, aryl aldehydes and aceotophenones in the presence of KOH/DMF that leads to pyrimido[1,2-b]indazole analogues. Response Surface Methodology (RSM) coupled with a Box-Behnken design (BBD) were utilized for exploring the effect of base used (A), temperature of reaction (B) and (C), reaction time. This approach can allow access to a variety of pyrimidoindazole fluorophores and related compounds. The compound N,N-dimethyl-4-(2-phenylpyrimido[1,2-b]indazol-4-yl)aniline (4e) displays the maximum fluorescence intensity at 518 nm and shows a fluorescence quantum yield of 0.068. The synthesized pyramido-fused indazoles have been evaluated for their free radical scavenging activity and compound 4f showed good antioxidant activity.
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Affiliation(s)
- Jeyakannu Palaniraja
- Chemistry of Heterocycles & Natural Product Research Laboratory, Department of Chemistry, School of Advanced Sciences, VIT University, Vellore 632014, Tamilnadu, India.
| | - Selvaraj Mohana Roopan
- Chemistry of Heterocycles & Natural Product Research Laboratory, Department of Chemistry, School of Advanced Sciences, VIT University, Vellore 632014, Tamilnadu, India.
| | - G Mokesh Rayalu
- G Mokesh Rayalu, Department of mathematics, School of Advanced Sciences, VIT University, Vellore 632014, Tamilnadu, India.
| | - Naif Abdullah Al-Dhabi
- Department of Botany and Microbiology, Addiriyah Chair for Environmental Studies, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.
| | - Mariadhas Valan Arasu
- Department of Botany and Microbiology, Addiriyah Chair for Environmental Studies, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.
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43
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Functionalization of indazoles by means of transition metal-catalyzed cross-coupling reactions. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.08.031] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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44
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Basu K, Poirier M, Ruck RT. Solution to the C3–Arylation of Indazoles: Development of a Scalable Method. Org Lett 2016; 18:3218-21. [DOI: 10.1021/acs.orglett.6b01456] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kallol Basu
- Department of Process & Analytical Chemistry, Merck Research Laboratories, Rahway, New Jersey 07065, United States
| | - Marc Poirier
- Department of Process & Analytical Chemistry, Merck Research Laboratories, Rahway, New Jersey 07065, United States
| | - Rebecca T. Ruck
- Department of Process & Analytical Chemistry, Merck Research Laboratories, Rahway, New Jersey 07065, United States
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45
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Akram Khan M, Afzal M. Chemical composition of Nigella sativa Linn: Part 2 Recent advances. Inflammopharmacology 2016; 24:67-79. [PMID: 27068721 PMCID: PMC4883276 DOI: 10.1007/s10787-016-0262-7] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 03/15/2016] [Indexed: 01/15/2023]
Abstract
The black cumin or Nigella sativa L. seeds have many acclaimed medicinal properties such as bronchodilatory, hypotensive, antibacterial, antifungal, analgesic, anti-inflammatory and immunopotentiating. This review article is an update on the previous article published on Nigella sativa L. in this journal in 1999. It covers the medicinal properties and chemical syntheses of the alkaloids isolated from the seeds of the herb.
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Affiliation(s)
- M Akram Khan
- Biomolecular Science Centre, Sheffield Hallam University, Howard Street, Sheffield, S1 1WB, UK.
| | - M Afzal
- Department of Biological Sciences, Faculty of Science, Kuwait University, Kuwait City, Kuwait
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46
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Vidyacharan S, Murugan A, Sharada DS. C(sp(2))-H Functionalization of 2H-Indazoles at C3-Position via Palladium(II)-Catalyzed Isocyanide Insertion Strategy Leading to Diverse Heterocycles. J Org Chem 2016; 81:2837-48. [PMID: 26954483 DOI: 10.1021/acs.joc.6b00048] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Herein, we have reported an efficient Pd-catalyzed C-H functionalization of 2H-indazole at C3-position via an isocyanide insertion strategy for the synthesis of unprecedented benzoxazinoindazoles, indazoloquinaoxalines and benzoxazinoindazolones for the first time. Our new method provides an operationally simple and versatile route for a selective synthesis of 2-(2H-indazol-2-yl)phenols. Furthermore, we developed a sequential one-pot strategy for the synthesis of benzoxazinoindazolone under metal-oxidant-free conditions. We also achieved the isocyanide insertion between C(sp(2))-H and oxygen heteroatom for the first time. The key features of the present protocol are construction of 4 bonds in one-pot, synthesis of new skeletally diverse scaffolds, broad substrate scope, high yields and environmentally benign conditions.
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Affiliation(s)
- Shinde Vidyacharan
- Department of Chemistry, Indian Institute of Technology Hyderabad , Kandi, Sangareddy, Medak District 502285, Telangana, India
| | - Arumugavel Murugan
- Department of Chemistry, Indian Institute of Technology Hyderabad , Kandi, Sangareddy, Medak District 502285, Telangana, India
| | - Duddu S Sharada
- Department of Chemistry, Indian Institute of Technology Hyderabad , Kandi, Sangareddy, Medak District 502285, Telangana, India
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47
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Lam BV, Berhault Y, Stiebing S, Fossey C, Cailly T, Collot V, Fabis F. Iodoindazoles with Selective Magnesiation at Position 3: A Route to Highly Functionalized Indazoles. Chemistry 2016; 22:4440-6. [DOI: 10.1002/chem.201504828] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Bao Vy Lam
- Normandie Université; France
- Université de Caen Normandie, CERMN (EA 4258 - FR CNRS 3038 INC3M - SF 4206 ICORE), UFR des Sciences Pharmaceutiques, Bd Becquerel, CS; 14032 Caen cedex 5 France
| | - Yohann Berhault
- Normandie Université; France
- Université de Caen Normandie, CERMN (EA 4258 - FR CNRS 3038 INC3M - SF 4206 ICORE), UFR des Sciences Pharmaceutiques, Bd Becquerel, CS; 14032 Caen cedex 5 France
| | - Silvia Stiebing
- Normandie Université; France
- Université de Caen Normandie, CERMN (EA 4258 - FR CNRS 3038 INC3M - SF 4206 ICORE), UFR des Sciences Pharmaceutiques, Bd Becquerel, CS; 14032 Caen cedex 5 France
| | - Christine Fossey
- Normandie Université; France
- Université de Caen Normandie, CERMN (EA 4258 - FR CNRS 3038 INC3M - SF 4206 ICORE), UFR des Sciences Pharmaceutiques, Bd Becquerel, CS; 14032 Caen cedex 5 France
| | - Thomas Cailly
- Normandie Université; France
- Université de Caen Normandie, CERMN (EA 4258 - FR CNRS 3038 INC3M - SF 4206 ICORE), UFR des Sciences Pharmaceutiques, Bd Becquerel, CS; 14032 Caen cedex 5 France
| | - Valérie Collot
- Normandie Université; France
- Université de Caen Normandie, CERMN (EA 4258 - FR CNRS 3038 INC3M - SF 4206 ICORE), UFR des Sciences Pharmaceutiques, Bd Becquerel, CS; 14032 Caen cedex 5 France
| | - Frédéric Fabis
- Normandie Université; France
- Université de Caen Normandie, CERMN (EA 4258 - FR CNRS 3038 INC3M - SF 4206 ICORE), UFR des Sciences Pharmaceutiques, Bd Becquerel, CS; 14032 Caen cedex 5 France
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48
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Wang D, Liu W, Yi F, Zhao Y, Chen J. Palladium-catalyzed direct C–H arylation of 3-aryl-2H-benzo[1,2,4]thiadiazine 1,1-dioxides: an efficient strategy to the synthesis of benzothiadiazine-1,1-dioxide derivatives. Org Biomol Chem 2016; 14:1921-4. [DOI: 10.1039/c5ob02196k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient strategy to the synthesis of 3-aryl-2H-benzo[1,2,4]thiadiazine 1,1-dioxide derivatives via palladium-catalyzed direct arylation of benzothiadiazine-1,1-dioxides with various aryl iodides is described.
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Affiliation(s)
- Dongyin Wang
- Department of Chemistry
- Jiangxi Normal University
- Nanchang
- PR China
- Key Laboratory of Functional Small Organic Molecule
| | - Wei Liu
- Department of Chemistry
- Jiangxi Normal University
- Nanchang
- PR China
- Key Laboratory of Functional Small Organic Molecule
| | - Fei Yi
- Department of Chemistry
- Jiangxi Normal University
- Nanchang
- PR China
| | - Yongli Zhao
- Department of Chemistry
- Jiangxi Normal University
- Nanchang
- PR China
| | - Junmin Chen
- Department of Chemistry
- Jiangxi Normal University
- Nanchang
- PR China
- Key Laboratory of Functional Small Organic Molecule
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49
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Ouyang JS, Li YF, Shen DS, Ke Z, Liu FS. Bulky α-diimine palladium complexes: highly efficient for direct C–H bond arylation of heteroarenes under aerobic conditions. Dalton Trans 2016; 45:14919-27. [DOI: 10.1039/c6dt02544g] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Through the strategy to enhance the bulkiness on both the backbone and the N-aryl moieties, we designed and synthesized a type of bulky α-diimine palladium complex (i.e., {[Ar–NC(R)–C(R)N–Ar]PdCl2, (Ar = 2-benzhydryl-4,6-dimethylphenyl)}, C1, R = H; C2, R = An; C3, R = Ph).
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Affiliation(s)
- Jia-Sheng Ouyang
- School of Chemistry and Chemical Engineering
- Guangdong Pharmaceutical University
- Zhongshan
- China
| | - Yan-Fang Li
- School of Chemistry and Chemical Engineering
- Guangdong Pharmaceutical University
- Zhongshan
- China
| | - Dong-Sheng Shen
- School of Chemistry and Chemical Engineering
- Guangdong Pharmaceutical University
- Zhongshan
- China
| | - Zhuofeng Ke
- School of Materials Science and Engineering
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- Sun Yat-sen University
- Guangzhou 510275
- China
| | - Feng-Shou Liu
- School of Chemistry and Chemical Engineering
- Guangdong Pharmaceutical University
- Zhongshan
- China
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50
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Palaniraja J, Roopan SM, Rayalu GM. One-pot synthesis of highly functionalized pyrimido[1,2-b]indazoles via 6-endo-dig cyclization. RSC Adv 2016. [DOI: 10.1039/c6ra02596j] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An efficient synthesis of nitrogen ring junction pyrimido-indazoles has been developed.
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Affiliation(s)
- Jeyakannu Palaniraja
- Chemistry of Heterocycles & Natural Product Research Laboratory
- Department of Chemistry
- School of Advanced Sciences
- VIT University
- Vellore 632 014
| | - Selvaraj Mohana Roopan
- Chemistry of Heterocycles & Natural Product Research Laboratory
- Department of Chemistry
- School of Advanced Sciences
- VIT University
- Vellore 632 014
| | - G. Mokesh Rayalu
- Department of Mathematics
- School of Advanced Sciences
- VIT University
- Vellore 632 014
- India
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