1
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Li A, Gao A, Chen K, Li H. Electrochemical Cyclization of o-Aminyl Azobenzenes: Roles of Aldehydes in N-N Bond Cleavage. Org Lett 2024. [PMID: 39038427 DOI: 10.1021/acs.orglett.4c01828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/24/2024]
Abstract
Direct functionalization of azobenzenes provides an approach to obtaining valuable molecules in synthetic chemistry. However, an efficient method for the cleavage of the N═N bond of azobenzenes, which is a key process for this transformation, is still lacking. We herein disclose an electrochemical reduction-induced cyclization of azobenzenes with aldehydes via N═N bond cleavage. This electrochemical cyclization of azobenzenes proceeds well in the absence of any transition metals or external chemical oxidants, leading to the formation of N-protected benzimidazoles in moderate to good yields.
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Affiliation(s)
- Anni Li
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
| | - Anna Gao
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
| | - Kangjia Chen
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
| | - Hongji Li
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
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2
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Griwatz JH, Campi CE, Kunz A, Wegner HA. In-situ Oxidation and Coupling of Anilines towards Unsymmetric Azobenzenes Using Flow Chemistry. CHEMSUSCHEM 2024; 17:e202301714. [PMID: 38240749 DOI: 10.1002/cssc.202301714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 01/17/2024] [Indexed: 02/10/2024]
Abstract
Molecular switches, especially azobenzenes, are used in numerous applications, such as molecular solar thermal storage (MOST) systems and photopharmacology. The Baeyer-Mills reaction of anilines and nitrosobenzenes has been established as an efficient synthetic method for non-symmetric azobenzenes. However, nitrosobenzenes are not stable, depending on their substitution pattern and pose a health risk. An in-situ oxidation of anilines with Oxone® was optimized under continuous flow conditions avoiding isolation and contact. The in-situ generated nitrosobenzene derivatives were subjected to a telescoped Baeyer-Mills reaction in flow. That way azobenzenes with a broad substituent spectrum were made accessible.
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Affiliation(s)
- Jan H Griwatz
- Institute of Organic Chemistry, Justus Liebig University Giessen, Heinrich-Buff-Ring 17, 35392, Giessen, Germany
- Center for Materials Research, Justus Liebig University Giessen, Heinrich-Buff-Ring 16, 35392, Giessen, Germany
| | - Chiara E Campi
- Institute of Organic Chemistry, Justus Liebig University Giessen, Heinrich-Buff-Ring 17, 35392, Giessen, Germany
| | - Anne Kunz
- Institute of Organic Chemistry, Justus Liebig University Giessen, Heinrich-Buff-Ring 17, 35392, Giessen, Germany
- Center for Materials Research, Justus Liebig University Giessen, Heinrich-Buff-Ring 16, 35392, Giessen, Germany
| | - Hermann A Wegner
- Institute of Organic Chemistry, Justus Liebig University Giessen, Heinrich-Buff-Ring 17, 35392, Giessen, Germany
- Center for Materials Research, Justus Liebig University Giessen, Heinrich-Buff-Ring 16, 35392, Giessen, Germany
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3
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Bhattacharjee S, Hajra A. Skeletal Editing through Molecular Recombination of 2H-Indazoles to Azo-Linked-Quinazolinones. Chemistry 2024; 30:e202303240. [PMID: 38019105 DOI: 10.1002/chem.202303240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 11/24/2023] [Accepted: 11/29/2023] [Indexed: 11/30/2023]
Abstract
A new protocol by the combinatory use of two equivalent of indazoles starting material with one being the carbon source via its C3-reactivity and the other, the coupling partner has been developed for the selectfluor-mediated single atom skeletal editing of 2H-indazoles. The azo-linked-2,3-disubstituted quinazolin-4-one derivatives were obtained through a carbon atom insertion between the two nitrogens of the indazole ring and simultaneous oxidation at C3 position of both indazole moieties. Mechanistic investigations reveal that the amidic carbonyl oxygen of the product is derived from water and the reaction proceeds through in-situ generated N-centred indazolone radical intermediate.
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Affiliation(s)
- Suvam Bhattacharjee
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan, 731235, West Bengal, India
| | - Alakananda Hajra
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan, 731235, West Bengal, India
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4
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Behera S, Aziz ST, Singla N, Mondal B. The synergy between electrochemical substrate oxidation and the oxygen reduction reaction to enable aerobic oxidation. Chem Commun (Camb) 2023; 59:11528-11531. [PMID: 37672289 DOI: 10.1039/d3cc02428h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/07/2023]
Abstract
Aerobic substrate oxidation reactions catalyzed by a heterogeneous catalyst can be looked upon as two independent half-cell reactions, viz. anodic substrate oxidation and the cathodic oxygen reduction reaction (ORR). In this context, Fe PANI/C, a well-known catalyst for the ORR, is chosen to validate this hypothesis, wherein the anodic reaction is hydrazine oxidation. Fe PANI/C shows excellent activity in terms of the electrochemical ORR and hydrazine oxidation in both alkaline aqueous and non-aqueous media and taken together the aerobic oxidation efficacy of hydrazine-like small organic molecules is correlated with the electrochemical outcomes.
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Affiliation(s)
- Snehanjali Behera
- Department of Chemistry, IIT Gandhinagar, Palaj, Gandhinagar-382355, Gujarat, India.
| | - Sk Tarik Aziz
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai 400 076, India
| | - Nisha Singla
- Department of Chemistry, IIT Gandhinagar, Palaj, Gandhinagar-382355, Gujarat, India.
| | - Biswajit Mondal
- Department of Chemistry, IIT Gandhinagar, Palaj, Gandhinagar-382355, Gujarat, India.
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5
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Li A, Li X, Ma F, Gao H, Li H. Cyclization of Azobenzenes Via Electrochemical Oxidation Induced Benzylic Radical Generation. Org Lett 2023; 25:5978-5983. [PMID: 37548915 DOI: 10.1021/acs.orglett.3c02099] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/08/2023]
Abstract
An electrochemical oxidation-induced cyclization of ortho-alkyl-substituted azobenzenes has been developed. The direct electrochemical benzylic C-H functionalization with respect to azobenzenes could proceed in the absence of any catalyst or external chemical oxidant to afford a number of 2H-indazole derivatives in moderate to good yields. This protocol enables the reuse of the byproduct to the same 2H-indazoles, thus significantly reducing pollution discharge in synthetic chemistry.
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Affiliation(s)
- Anni Li
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, Anhui, P. R. China
| | - Xiangyi Li
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, Anhui, P. R. China
| | - Fang Ma
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, Anhui, P. R. China
| | - Hui Gao
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, Anhui, P. R. China
- Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, P. R. China
| | - Hongji Li
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, Anhui, P. R. China
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6
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Abd El-Lateef HM, Khalaf MM, Amer AA, Kandeel M, Abdelhamid AA, Abdou A. Synthesis, Characterization, Antimicrobial, Density Functional Theory, and Molecular Docking Studies of Novel Mn(II), Fe(III), and Cr(III) Complexes Incorporating 4-(2-Hydroxyphenyl azo)-1-naphthol (Az). ACS OMEGA 2023; 8:25877-25891. [PMID: 37521661 PMCID: PMC10373178 DOI: 10.1021/acsomega.3c01413] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Accepted: 07/03/2023] [Indexed: 08/01/2023]
Abstract
This work synthesized three new CrAz2, MnAz2, and FeAz2 complexes and investigated them using IR, mass, UV spectroscopy, elemental analysis, conductivity and magnetic tests, and thermogravimetric analysis. The azo-ligand, 4-(2-hydroxyphenylAzo)-1-naphthol (Az), couples with metal ions via its nitrogen (in -N=N- bonds) and oxygen (in hydroxyl group) atoms, according to the IR spectra of these complexes. Through thermal examination (TG/TGA), the number and location of water in the complexes were also determined. Density functional theory (DFT) theory is applied to ameliorate the structures of the ligand (Az) and metal complexes and analyze the quantum chemical characteristics of these complexes. The antifungal and antibacterial activity of the ligand and its complexes opposed to several hazardous bacteria and fungi was investigated in vitro. Metal complexes were discovered to have a higher inhibitory impact on some organisms than the free ligand. The MnAz2 complex exhibited the best activity among the studied materials, whereas the CrAz2 complex had the lowest. The compounds' binding affinity to the E. coli (PDB ID: 1hnj) structure was predicted using molecular docking. Binding energies were calculated by analyzing protein-substrate interactions. These encouraging findings imply that these chemicals may have physiological effects and may be valuable for a variety of medical uses in the future.
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Affiliation(s)
- Hany M. Abd El-Lateef
- Department
of Chemistry, College of Science, King Faisal
University, Al-Ahsa 31982, Saudi Arabia
- Chemistry
Department, Faculty of Science, Sohag University, Sohag 82524, Egypt
| | - Mai M. Khalaf
- Department
of Chemistry, College of Science, King Faisal
University, Al-Ahsa 31982, Saudi Arabia
- Chemistry
Department, Faculty of Science, Sohag University, Sohag 82524, Egypt
| | - Amer A. Amer
- Chemistry
Department, Faculty of Science, Sohag University, Sohag 82524, Egypt
| | - Mahmoud Kandeel
- Department
of Biomedical Sciences, College of Veterinary Medicine, King Faisal University, 31982 Al-Ahsa, Saudi Arabia
- Department
of Pharmacology, Faculty of Veterinary Medicine, Kafrelsheikh University, 33516 Kafrelsheikh, Egypt
| | - Antar A. Abdelhamid
- Chemistry
Department, Faculty of Science, Sohag University, Sohag 82524, Egypt
- Chemistry
Department, Faculty of Science, Albaha University, Albaha 1988, Saudi Arabia
| | - Aly Abdou
- Chemistry
Department, Faculty of Science, Sohag University, Sohag 82524, Egypt
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7
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Zhang Q, Huang X, Gui Y, He Y, Liao S, Huang G, Liang T, Zhang Z. Unlocking Regiodivergence in Pd II- and Rh III-Mediated Site-Selective C-H Bond Alkynylation of Imidazopyridines. Org Lett 2023; 25:1447-1452. [PMID: 36826371 DOI: 10.1021/acs.orglett.3c00178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
An efficient PdII- and RhIII-controlled site-selective C-H bond alkynylation of imidazopyridines using (bromoethynyl)triisopropylsilane is disclosed. The divergent methodology allows straightforward access to a wide range of products alkynylated at the C3 and ortho positions. This strategy is suggestive of a practical platform that can be suitable for late-stage diversification and may assist in the design of more selective and complementary catalytic systems.
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Affiliation(s)
- Qiang Zhang
- Guangxi Key Laboratory of Electrochemical Energy Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, China
| | - Xuecong Huang
- Guangxi Key Laboratory of Electrochemical Energy Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, China
| | - Yuting Gui
- Guangxi Key Laboratory of Electrochemical Energy Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, China
| | - Youyuan He
- Guangxi Key Laboratory of Electrochemical Energy Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, China
| | - Siyang Liao
- Guangxi Key Laboratory of Electrochemical Energy Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, China
| | - Guan Huang
- Guangxi Key Laboratory of Electrochemical Energy Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, China
| | - Taoyuan Liang
- Guangxi Key Laboratory of Electrochemical Energy Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, China
| | - Zhuan Zhang
- Guangxi Key Laboratory of Electrochemical Energy Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, China
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8
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Suwasia S, Venkataramani S, Babu SA. Pd(II)-catalyzed coupling of C-H bonds of carboxamides with iodoazobenzenes toward modified azobenzenes. Org Biomol Chem 2023; 21:1793-1813. [PMID: 36744837 DOI: 10.1039/d2ob02322a] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
In this paper, we report a synthetic protocol for the construction of biaryl motif-based or π-extended azobenzene and alkylated azobenzene derivatives via the Pd(II)-catalyzed bidentate directing group (DG)-aided C-H activation and functionalization strategy. In the past, the synthesis of biaryl motif-based azobenzenes was accomplished through the traditional cross-coupling reaction involving organometallic reagents and aryl halides or equivalent coupling partners. We have shown the direct coupling of C-H bonds of aromatic/aliphatic carboxamides (possessing a DG) with iodoazobenzenes as the coupling partners through the Pd(II)-catalyzed bidentate DG-aided, site-selective C-H functionalization method. Azobenzene-containing compounds are a versatile class of photo-responsive molecules that have found applications across branches of chemical, biological and materials sciences and are prevalent in medicinally relevant molecules. Accordingly, the synthesis of new and functionalized azobenzene-based scaffolds has been an attractive topic of research. Although the classical methods are efficient, they need pre-functionalized starting materials. This protocol involving the Pd(II)-catalyzed, directing group-aided site-selective C-H arylation of aromatic and aliphatic carboxamides using iodoazobenzene as the coupling partner affording azobenzene-based carboxamides is an additional route and also a contribution towards enriching the library of modified azobenzenes. We have also shown the photoswitching properties of representative compounds synthesized via the Pd(II)-catalyzed directing group-aided site-selective C-H functionalization method.
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Affiliation(s)
- Sonam Suwasia
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector 81, SAS Nagar, Mohali, Manauli P.O., Punjab, 140306, India.
| | - Sugumar Venkataramani
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector 81, SAS Nagar, Mohali, Manauli P.O., Punjab, 140306, India.
| | - Srinivasarao Arulananda Babu
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector 81, SAS Nagar, Mohali, Manauli P.O., Punjab, 140306, India.
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9
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Padmavathi R, Babu SA. Pd(II)-catalyzed selective β-C-H functionalization of azobenzene carboxamides. Org Biomol Chem 2023; 21:2689-2694. [PMID: 36691730 DOI: 10.1039/d2ob02261c] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
We report a Pd(II)-catalyzed bidentate directing group 8-aminoquinoline-aided, site-selective β-C-H functionalization protocol for assembling modified azobenzene carboxamides. Considering the importance of azobenzenes in chemical sciences, this paper reports a new route for enriching the library of modified azobenzene motifs.
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Affiliation(s)
- Rayavarapu Padmavathi
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector 81, SAS Nagar, Mohali, Manauli P.O., Punjab, 140306, India.
| | - Srinivasarao Arulananda Babu
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector 81, SAS Nagar, Mohali, Manauli P.O., Punjab, 140306, India.
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10
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Jiménez-Aberásturi X, Palacios F, de Los Santos JM. Sc(OTf) 3-Mediated [4 + 2] Annulations of N-Carbonyl Aryldiazenes with Cyclopentadiene to Construct Cinnoline Derivatives: Azo-Povarov Reaction. J Org Chem 2022; 87:11583-11592. [PMID: 35972474 PMCID: PMC9447289 DOI: 10.1021/acs.joc.2c01224] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We disclose the first accomplishment of the azo-Povarov reaction involving Sc(OTf)3-catalyzed [4 + 2] annulations of N-carbonyl aryldiazenes with cyclopentadiene in chloroform, in which N-carbonyl aryldiazenes act as 4π-electron donors. Hence, this protocol offers a rapid access to an array of cinnoline derivatives in moderate to good yields for substrates over a wide scope. The synthetic potential of the protocol was achieved by the gram-scale reaction and further derivatization of the obtained polycyclic product.
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Affiliation(s)
- Xabier Jiménez-Aberásturi
- Department of Organic Chemistry I, Faculty of Pharmacy and Lascaray Research Center, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, Vitoria 01006, Spain
| | - Francisco Palacios
- Department of Organic Chemistry I, Faculty of Pharmacy and Lascaray Research Center, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, Vitoria 01006, Spain
| | - Jesús M de Los Santos
- Department of Organic Chemistry I, Faculty of Pharmacy and Lascaray Research Center, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, Vitoria 01006, Spain
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11
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Damiano C, Cavalleri M, Panza N, Gallo E. Cobalt Porphyrin‐Catalysed Synthesis of Azobenzenes by Dehydrogenative Coupling of Anilines. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Caterina Damiano
- University of Milan: Universita degli Studi di Milano Department of Chemistry ITALY
| | - Matteo Cavalleri
- University of Milan: Universita degli Studi di Milano Department of Chemistry ITALY
| | - Nicola Panza
- University of Milan: Universita degli Studi di Milano Department of Chemistry ITALY
| | - Emma Gallo
- Universita degli Studi di Milano Department of Chemistry Via Golgi 19 20133 Milano ITALY
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12
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Zhong Q, Gao H, Wang PL, Zhou C, Miao T, Li H. Electrochemical Site-Selective Alkylation of Azobenzenes with (Thio)Xanthenes. Molecules 2022; 27:molecules27154967. [PMID: 35956916 PMCID: PMC9370205 DOI: 10.3390/molecules27154967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Revised: 07/31/2022] [Accepted: 08/02/2022] [Indexed: 12/10/2022] Open
Abstract
Herein, we first report an electrochemical methodology for the site-selective alkylation of azobenzenes with (thio)xanthenes in the absence of any transition metal catalyst or external oxidant. A variety of groups are compatible with this electrochemical alkylation, which furnishes the products in moderate to good yields.
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Affiliation(s)
- Qiang Zhong
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, China
| | - Hui Gao
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, China
- Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, China
| | - Pei-Long Wang
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, China
- Information College, Huaibei Normal University, Huaibei 235000, China
- Correspondence: (P.-L.W.); (H.L.)
| | - Chao Zhou
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, China
| | - Tao Miao
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, China
| | - Hongji Li
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, China
- Correspondence: (P.-L.W.); (H.L.)
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13
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Liu Z, Fang Y, Liu Y, Fu W, Gan X, Gao W, Tang B. One-Pot Difunctionalization of Aryldiazonium Salts for Synthesis of para-Azophenols. Front Chem 2022; 10:818627. [PMID: 35155368 PMCID: PMC8826725 DOI: 10.3389/fchem.2022.818627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Accepted: 01/03/2022] [Indexed: 11/24/2022] Open
Abstract
A novel difunctionalization of aryldiazonium salts was realized for the one-step generation of symmetric and asymmetric p-azophenols. This approach is proceeded by the sequentially regioselective aromatic C-O and C-N bond construction under mild reaction conditions, unlocking a new reaction strategy to facilitate the synthesis of p-azophenols.
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Affiliation(s)
- Zhenhua Liu
- Key Laboratory of Molecular and Nano Probes, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Ministry of Education, Shandong Normal University, Jinan, China
| | - Yang Fang
- Key Laboratory of Molecular and Nano Probes, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Ministry of Education, Shandong Normal University, Jinan, China
| | - Yi Liu
- Key Laboratory of Molecular and Nano Probes, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Ministry of Education, Shandong Normal University, Jinan, China
| | - Wei Fu
- Department of Pharmacy, Zibo Central Hospital, Zibo, China
| | - Xingxing Gan
- Key Laboratory of Molecular and Nano Probes, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Ministry of Education, Shandong Normal University, Jinan, China
| | - Wen Gao
- Key Laboratory of Molecular and Nano Probes, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Ministry of Education, Shandong Normal University, Jinan, China
- *Correspondence: Wen Gao, ; Bo Tang,
| | - Bo Tang
- Key Laboratory of Molecular and Nano Probes, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Ministry of Education, Shandong Normal University, Jinan, China
- *Correspondence: Wen Gao, ; Bo Tang,
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14
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Yang W, Zhang H, Liu Y, Tang C, Xu X, Liu J. Rh( iii)-catalyzed synthesis of dibenzo[ b, d]pyran-6-ones from aryl ketone O-acetyl oximes and quinones via C–H activation and C–C bond cleavage. RSC Adv 2022; 12:14435-14438. [PMID: 35702227 PMCID: PMC9096810 DOI: 10.1039/d2ra02074b] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 05/05/2022] [Indexed: 12/17/2022] Open
Abstract
A redox-neutral synthesis of dibenzo[b,d]pyran-6-ones from aryl ketone O-acetyl oximes and quinones has been realized via Rh(iii)-catalyzed cascade C–H activation annulation. A possible Rh(iii)–Rh(v)–Rh(iii) mechanism involving an unprecedented β-C elimination step was proposed. A novel procedure for the synthesis of dibenzo[b,d]pyran-6-ones via Rh(iii)-catalyzed C–H activation and C–C bond cleavage is described.![]()
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Affiliation(s)
- Wei Yang
- School of Chemical Engineering, Northeast Electric Power University, Jilin 132012, China
- Gongqing Institute of Science and Technology, Gongqing 332020, China
| | - Haonan Zhang
- School of Chemical Engineering, Northeast Electric Power University, Jilin 132012, China
| | - Yu Liu
- School of Chemical Engineering, Northeast Electric Power University, Jilin 132012, China
- Gongqing Institute of Science and Technology, Gongqing 332020, China
| | - Cuiman Tang
- School of Chemical Engineering, Northeast Electric Power University, Jilin 132012, China
| | - Xiaohui Xu
- School of Chemical Engineering, Northeast Electric Power University, Jilin 132012, China
| | - Jiaqi Liu
- School of Chemical Engineering, Northeast Electric Power University, Jilin 132012, China
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15
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Li C, Zhong Q, Tang S, Wang L, Li P, Li H. Electrochemical formal [3 + 2] cycloaddition of azobenzenes with hexahydro-1,3,5-triazines. Org Chem Front 2022. [DOI: 10.1039/d2qo00530a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A catalyst-free electrochemical [3 + 2] cycloaddition of azobenzenes with hexahydro-1,3,5-triazines without an external oxidant has been developed for constructing the 1,2,4-triazolidine skeleton.
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Affiliation(s)
- Chao Li
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education; School of Chemistry and Materials Science, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
| | - Qiang Zhong
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education; School of Chemistry and Materials Science, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
| | - Shujun Tang
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education; School of Chemistry and Materials Science, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
| | - Lei Wang
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education; School of Chemistry and Materials Science, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
- Advanced Research Institute and Department of Chemistry, Taizhou University, Taizhou, Zhejiang 318000, P. R. China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Shanghai 200032, P. R. China
| | - Pinhua Li
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education; School of Chemistry and Materials Science, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
| | - Hongji Li
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education; School of Chemistry and Materials Science, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
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16
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Kaler S, Jones MD. Recent advances in externally controlled ring-opening polymerisations. Dalton Trans 2021; 51:1241-1256. [PMID: 34918735 DOI: 10.1039/d1dt03471e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Switchable catalysis is a powerful tool in the polymer chemist's toolbox as it allows on demand access to a variety of polymer architectures. Switchable catalysts operate by the generation of a species which is chemically distinct in behaviour and structure to the precursor. This difference in catalytic activity has been exploited to allow spatiotemporal control over polymerisations in the synthesis of (co)polymers. Although switchable methodologies have been applied to other polymerisation mechanisms for quite some time, for ring opening polymerisation (ROP) reactions it is a relatively young area of research. Despite its infancy, the field is accelerating rapidly. Here, we review recent developments for selected external stimuli for ROP, including redox chemistry, light, allosteric and mechanical control. Furthermore, a brief review on switch catalysis involving exogeneous gases will also be provided, although this area differs from traditional switchable catalysis techniques. An outlook on the future of switchable catalysis is also provided.
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Affiliation(s)
- Sandeep Kaler
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK.
| | - Matthew D Jones
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK.
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17
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Mandal T, Yadav S, Choudhury J. Steric effect of NHC ligands in Pd(II)–NHC-catalyzed non-directed C–H acetoxylation of simple arenes. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.122047] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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18
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Just‐Baringo X, Yeste‐Vázquez A, Moreno‐Morales J, Ballesté‐Delpierre C, Vila J, Giralt E. Controlling Antibacterial Activity Exclusively with Visible Light: Introducing a Tetra-ortho-Chloro-Azobenzene Amino Acid. Chemistry 2021; 27:12987-12991. [PMID: 34227716 PMCID: PMC8518743 DOI: 10.1002/chem.202102370] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Indexed: 11/30/2022]
Abstract
The introduction of a novel tetra-ortho-chloroazobenzene amino acid (CEBA) has enabled photoswitching of the antimicrobial activity of tyrocidine A analogues by using exclusively visible light, granting spatiotemporal control under benign conditions. Compounds bearing this photoswitchable amino acid become active upon irradiation with red light, but quickly turn-off upon exposure to other visible light wavelengths. Critically, sunlight quickly triggers isomerisation of the red light-activated compounds into their original trans form, offering an ideal platform for self-deactivation upon release into the environment. Linear analogues of tyrocidine A were found to provide the best photocontrol of their antimicrobial activity, leading to compounds active against Acinetobacter baumannii upon isomerisation. Exploration of their N- and C-termini has provided insights into key elements of their structure and has allowed obtaining new antimicrobials displaying excellent strain selectivity and photocontrol.
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Affiliation(s)
- Xavier Just‐Baringo
- Institute for Research in Biomedicine (IRB Barcelona)Barcelona Institute of Science and Technology (BIST)Baldiri Reixac 1008028BarcelonaSpain
- Laboratori de Química OrgànicaFacultat de FarmàciaIBUBUniversitat de Barcelona08028BarcelonaSpain
| | - Alejandro Yeste‐Vázquez
- Institute for Research in Biomedicine (IRB Barcelona)Barcelona Institute of Science and Technology (BIST)Baldiri Reixac 1008028BarcelonaSpain
| | - Javier Moreno‐Morales
- Institute for Global Health (ISGlobal)Hospital Clínic - Universitat de BarcelonaBarcelonaSpain
| | | | - Jordi Vila
- Institute for Global Health (ISGlobal)Hospital Clínic - Universitat de BarcelonaBarcelonaSpain
- Department of Clinical Microbiology – CDBHospital Clínic - University of BarcelonaBarcelonaSpain
| | - Ernest Giralt
- Institute for Research in Biomedicine (IRB Barcelona)Barcelona Institute of Science and Technology (BIST)Baldiri Reixac 1008028BarcelonaSpain
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19
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Sunny S, Karvembu R. Recent Advances in Cobalt‐Catalyzed, Directing‐Group‐Assisted C−H Bond Amidation Reactions. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100558] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Sereena Sunny
- Department of Chemistry National Institute of Technology Tiruchirappalli 620015 India
| | - Ramasamy Karvembu
- Department of Chemistry National Institute of Technology Tiruchirappalli 620015 India
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20
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Park MS, Moon K, Oh H, Lee JY, Ghosh P, Kang JY, Park JS, Mishra NK, Kim IS. Synthesis of (2 H)-Indazoles and Dihydrocinnolinones through Annulation of Azobenzenes with Vinylene Carbonate under Rh(III) Catalysis. Org Lett 2021; 23:5518-5522. [PMID: 34228466 DOI: 10.1021/acs.orglett.1c01866] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The Rh(III)-catalyzed C-H functionalization and subsequent intramolecular cyclization between azobenzenes and vinylene carbonate is described herein. Depending on the electronic property of azobenzenes, this transformation results in the formation of (2H)-indazoles or dihydrocinnolin-4-ones through the generation of ortho-alkylated azo-intermediates followed by decarboxylation. Surprisingly, vinylene carbonate acts as an acetaldehyde or acetyl surrogate to enable the [4 + 1] or [4 + 2] annulation reaction. This transformation is characterized by its mild reaction conditions, simplicity, and excellent functional group compatibility.
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Affiliation(s)
- Min Seo Park
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Kyeongwon Moon
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Harin Oh
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Ji Yoon Lee
- Department of Chemistry, Sookmyung Women's University, Seoul 04310, Republic of Korea
| | - Prithwish Ghosh
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Ju Young Kang
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Jung Su Park
- Department of Chemistry, Sookmyung Women's University, Seoul 04310, Republic of Korea
| | | | - In Su Kim
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
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21
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Cheng HB, Zhang S, Qi J, Liang XJ, Yoon J. Advances in Application of Azobenzene as a Trigger in Biomedicine: Molecular Design and Spontaneous Assembly. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2007290. [PMID: 34028901 DOI: 10.1002/adma.202007290] [Citation(s) in RCA: 82] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Revised: 12/10/2020] [Indexed: 06/12/2023]
Abstract
Azobenzene is a well-known derivative of stimulus-responsive molecular switches and has shown superior performance as a functional material in biomedical applications. The results of multiple studies have led to the development of light/hypoxia-responsive azobenzene for biomedical use. In recent years, long-wavelength-responsive azobenzene has been developed. Matching the longer wavelength absorption and hypoxia-response characteristics of the azobenzene switch unit to the bio-optical window results in a large and effective stimulus response. In addition, azobenzene has been used as a hypoxia-sensitive connector via biological cleavage under appropriate stimulus conditions. This has resulted in on/off state switching of properties such as pharmacology and fluorescence activity. Herein, recent advances in the design and fabrication of azobenzene as a trigger in biomedicine are summarized.
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Affiliation(s)
- Hong-Bo Cheng
- State Key Laboratory of Organic-Inorganic Composites, Beijing Laboratory of Biomedical Materials, College of Materials Science and Engineering, Beijing University of Chemical Technology, 15 North Third Ring Road, Beijing, 100029, P. R. China
| | - Shuchun Zhang
- State Key Laboratory of Organic-Inorganic Composites, Beijing Laboratory of Biomedical Materials, College of Materials Science and Engineering, Beijing University of Chemical Technology, 15 North Third Ring Road, Beijing, 100029, P. R. China
| | - Ji Qi
- State Key Laboratory of Organic-Inorganic Composites, Beijing Laboratory of Biomedical Materials, College of Materials Science and Engineering, Beijing University of Chemical Technology, 15 North Third Ring Road, Beijing, 100029, P. R. China
| | - Xing-Jie Liang
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, No. 11, First North Road, Zhongguancun, Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Juyoung Yoon
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul, 03760, Korea
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22
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Fang X, Cao J, Ding W, Jin H, Yu X, Wang S. Copper-Catalyzed Aerobic Oxidative Cyclization of 2-Alkynylanilines with Nitrosoarenes: Synthesis of Organic Solid Mechanoluminescence Compounds of 4-Oxo-4 H-cinnolin-2-ium-1-ide. Org Lett 2021; 23:1228-1233. [PMID: 33522243 DOI: 10.1021/acs.orglett.0c04186] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient Cu(I)/DMAP/air system for the one-pot synthesis of 4-oxo-4H-cinnolin-2-ium-1-ides, which are often difficult to prepare by traditional routes from substituted 2-alkynylanilines and nitrosoarenes, was developed. These 4-oxo-4H-cinnolin-2-ium-1-ides have practical applications as mechanoluminescent materials. Preliminary mechanistic experiments were performed, and a plausible mechanism for this tandem process is proposed. The use of an inexpensive copper catalyst and molecular oxygen as the oxygen source and the oxidant make this an attractive green protocol with potential synthetic applications.
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Affiliation(s)
- Xiaolan Fang
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou, 325035, P. R. China
| | - Ji Cao
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou, 325035, P. R. China
| | - Weijie Ding
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou, 325035, P. R. China
| | - Huile Jin
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou, 325035, P. R. China
| | - Xiaochun Yu
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou, 325035, P. R. China
| | - Shun Wang
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou, 325035, P. R. China
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23
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Zhou J, Yin C, Zhong T, Zheng X, Yi X, Chen J, Yu C. A direct synthesis method towards spirocyclic indazole derivatives via Rh( iii)-catalyzed C–H activation and spiroannulation. Org Chem Front 2021. [DOI: 10.1039/d1qo00805f] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A rhodium(iii)-catalyzed [4 + 1] spiroannulation of N-aryl phthalazine-diones (pyridazine-diones) with diazo compounds to construct spirocyclic indazole derivatives with diverse structures is described.
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Affiliation(s)
- Jian Zhou
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. of China
| | - Chuanliu Yin
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. of China
| | - Tianshuo Zhong
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. of China
| | - Xiangyun Zheng
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. of China
| | - Xiao Yi
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. of China
| | - Junyu Chen
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. of China
| | - Chuanming Yu
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. of China
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24
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Shang Y, Sun L, Wang H, Li S, Cao K, Huo P. Azobenzene-modified Ag/Ag 2O/CN photocatalysts with photoresponsive performance for controllable photodegradation of tetracyclines. NEW J CHEM 2021. [DOI: 10.1039/d1nj00933h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, an Azo@Ag/Ag2O/CN composite photocatalyst with light-responsive performance was successfully prepared by precipitation and emulsion polymerization. Azo@Ag/Ag2O/CN exhibits cis-trans isomerism under different light exposures.
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Affiliation(s)
- Ye Shang
- School of Chemistry
- Zhengzhou University
- Zhengzhou 450001
- P. R. China
- School of Chemical and Environmental Engineering
| | - Linlin Sun
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang 212013
- P. R. China
| | - Huiqin Wang
- School of Energy and Power Engineering
- Jiangsu University
- Zhenjiang 212013
- P. R. China
| | - Songtian Li
- School of Chemistry
- Zhengzhou University
- Zhengzhou 450001
- P. R. China
- School of Chemical and Environmental Engineering
| | - Kesheng Cao
- School of Chemical and Environmental Engineering
- Pingdingshan University
- Pingdingshan 467000
- P. R. China
| | - Pengwei Huo
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang 212013
- P. R. China
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25
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Zhang W, Bu J, Wang L, Li P, Li H. Sunlight-mediated [3 + 2] cycloaddition of azobenzenes with arynes: an approach toward the carbazole skeleton. Org Chem Front 2021. [DOI: 10.1039/d1qo00739d] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A mild sunlight-mediated [3 + 2] cycloaddition of azobenzenes with arynes has been established for the construction of the carbazole backbone.
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Affiliation(s)
- Wenjie Zhang
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education; School of Chemistry and Materials Science, Huaibei Normal University, Huaibei, Anhui 235000, P.R. China
| | - Jiahui Bu
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education; School of Chemistry and Materials Science, Huaibei Normal University, Huaibei, Anhui 235000, P.R. China
| | - Lei Wang
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education; School of Chemistry and Materials Science, Huaibei Normal University, Huaibei, Anhui 235000, P.R. China
- Advanced Research Institute and Department of Chemistry, Taizhou University, Taizhou, Zhejiang 318000, P. R. China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Shanghai 200032, P. R. China
| | - Pinhua Li
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education; School of Chemistry and Materials Science, Huaibei Normal University, Huaibei, Anhui 235000, P.R. China
| | - Hongji Li
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education; School of Chemistry and Materials Science, Huaibei Normal University, Huaibei, Anhui 235000, P.R. China
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26
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Kachi-Terajima C, Mutoh N, Sasada Y, Anjo K. Cyclometalation reactions of platinum complexes with azo- and imine-based ligands: Ligand-dependent and water-induced C–H activation. J Organomet Chem 2020. [DOI: 10.1016/j.jorganchem.2020.121548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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27
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Wang ZQ, Yu JX, Bai SQ, Liu B, Wang CY, Li JH. Oxidative Dehydrogenation of Hydrazobenzenes toward Azo Compounds Catalyzed by tert-Butyl Nitrite in EtOH. ACS OMEGA 2020; 5:28856-28862. [PMID: 33195938 PMCID: PMC7659151 DOI: 10.1021/acsomega.0c04348] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Accepted: 10/07/2020] [Indexed: 05/02/2023]
Abstract
We describe a tert-butyl nitrite-catalyzed oxidative dehydrogenation of hydrazobenzenes for producing azobenzenes. This method proceeds at ambient temperature and under an atmospheric environment by employing eco-friendly EtOH as the medium, representing a mild, general route to the synthesis of various symmetrical and nonsymmetrical azobenzenes in excellent yields with broad functional group tolerance.
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Affiliation(s)
- Zhi-Qiang Wang
- Key
Laboratory of Functional Metal-Organic Compounds of Hunan Province,
Key Laboratory of Functional Organometallic Materials, University
of Hunan Province, College of Chemistry and Materials Science, Hengyang Normal University, Hengyang 421008, China
| | - Jiang-Xi Yu
- Key
Laboratory of Functional Metal-Organic Compounds of Hunan Province,
Key Laboratory of Functional Organometallic Materials, University
of Hunan Province, College of Chemistry and Materials Science, Hengyang Normal University, Hengyang 421008, China
| | - Shan-Qin Bai
- Key
Laboratory of Functional Metal-Organic Compounds of Hunan Province,
Key Laboratory of Functional Organometallic Materials, University
of Hunan Province, College of Chemistry and Materials Science, Hengyang Normal University, Hengyang 421008, China
| | - Bang Liu
- Key
Laboratory of Functional Metal-Organic Compounds of Hunan Province,
Key Laboratory of Functional Organometallic Materials, University
of Hunan Province, College of Chemistry and Materials Science, Hengyang Normal University, Hengyang 421008, China
| | - Cheng-Yong Wang
- Key
Laboratory of Functional Metal-Organic Compounds of Hunan Province,
Key Laboratory of Functional Organometallic Materials, University
of Hunan Province, College of Chemistry and Materials Science, Hengyang Normal University, Hengyang 421008, China
| | - Jin-Heng Li
- Key
Laboratory of Functional Metal-Organic Compounds of Hunan Province,
Key Laboratory of Functional Organometallic Materials, University
of Hunan Province, College of Chemistry and Materials Science, Hengyang Normal University, Hengyang 421008, China
- State
Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China
- Key
Laboratory of Jiangxi Province for Persistent Pollutants Control and
Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
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28
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Barber JS, Burtea A, Collins MR, Tran-Dubé M, Patman RL, Scales S, Smith G, Spangler JE, Wang F, Wang W, Yang S, Zhu J, Montgomery TP. Development of a Late-Stage Diversification Strategy for the 4- and 5-Positions of 4,5,6-Trisubstituted Indazoles. Org Lett 2020; 22:9047-9052. [PMID: 33166447 DOI: 10.1021/acs.orglett.0c03440] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Indazoles represent a privileged motif in drug discovery. However, the formation of highly substituted indazoles can require the execution of lengthy synthetic routes with minimal opportunities to introduce diversity. In this report, we disclose the development of a late-stage diversification strategy for the 4- and 5-positions of 4,5,6-trisubstituted indazoles. A regioselective C-H functionalization and subsequent nucleophilic aromatic substitution provide two sequential points of diversification. The synthetic sequence delivers rapid access to an array of 4,5,6-trisubstituted indazoles in only four steps from readily available starting materials.
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Affiliation(s)
- Joyann S Barber
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Alexander Burtea
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Michael R Collins
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Michelle Tran-Dubé
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Ryan L Patman
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Stephanie Scales
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Graham Smith
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Jillian E Spangler
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Fen Wang
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Wei Wang
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Shouliang Yang
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - JinJiang Zhu
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
| | - T Patrick Montgomery
- Pfizer Oncology Medicinal Chemistry, 10770 Science Center Drive, San Diego, California 92121, United States
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29
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Yang J, Song M, Zhou H, Wang G, Ma B, Qi Y, Huo C. Visible-Light-Mediated Hydroacylation of Azobenzenes with α-Keto Acids. Org Lett 2020; 22:8407-8412. [DOI: 10.1021/acs.orglett.0c03039] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Jingya Yang
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Menghui Song
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Hongyan Zhou
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
- College of Science, Gansu Agricultural University, Lanzhou 730070, China
| | - Ganggang Wang
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Ben Ma
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Yuanyuan Qi
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Congde Huo
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
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30
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Xiong X, Mao YJ, Hao HY, He YT, Xu ZY, Luo G, Lou SJ, Xu DQ. Nitrate promoted mild and versatile Pd-catalysed C(sp 2)-H oxidation with carboxylic acids. Org Biomol Chem 2020; 18:6732-6737. [PMID: 32832956 DOI: 10.1039/d0ob01124j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A nitrate-promoted Pd-catalysed mild cross-dehydrogenative C(sp2)-H bond oxidation of oximes or azobenzenes with diverse carboxylic acids has been developed. In contrast to the previous catalytic systems, this protocol features mild conditions (close to room temperature for most cases) and a broad substrate scope (up to 64 examples), thus constituting a versatile method to directly prepare diverse O-aryl esters. Moreover, the superiority of the nitrate additive in this mild transformation was further determined by experimental and computational evidence.
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Affiliation(s)
- Xue Xiong
- College of Chemical Engineering, Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
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31
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Zhilin ES, Polkovnichenko MS, Ananyev IV, Fershtat LL, Makhova NN. Novel Arylazo‐1,2,5‐oxadiazole Photoswitches: Synthesis, Photoisomerization and Nitric Oxide Releasing Properties. CHEMPHOTOCHEM 2020. [DOI: 10.1002/cptc.202000157] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Egor S. Zhilin
- N.D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences Moskva 119991 Leninsky Prospect, 47 Moscow Russia
| | - Michael S. Polkovnichenko
- N.D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences Moskva 119991 Leninsky Prospect, 47 Moscow Russia
- Department of Chemistry M. V. Lomonosov Moscow State University Moskva 119991 Leninskie Gory 1–3 Moscow Russia
| | - Ivan V. Ananyev
- A. N. Nesmeyanov Institute of Organoelement Compounds Russian Academy of Sciences Moskva 119991 Vavilova str., 28 Moscow Russia
| | - Leonid L. Fershtat
- N.D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences Moskva 119991 Leninsky Prospect, 47 Moscow Russia
| | - Nina N. Makhova
- N.D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences Moskva 119991 Leninsky Prospect, 47 Moscow Russia
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33
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Gerkman MA, Gibson RSL, Calbo J, Shi Y, Fuchter MJ, Han GGD. Arylazopyrazoles for Long-Term Thermal Energy Storage and Optically Triggered Heat Release below 0 °C. J Am Chem Soc 2020; 142:8688-8695. [DOI: 10.1021/jacs.0c00374] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mihael A. Gerkman
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02453, United States
| | - Rosina S. L. Gibson
- Molecular Sciences Research Hub, Department of Chemistry, Imperial College London, Wood Lane, London W12 0BZ, United Kingdom
| | - Joaquín Calbo
- Instituto de Ciencia Molecular, Universidad de Valencia, 46890 Paterna, Spain
| | - Yuran Shi
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02453, United States
| | - Matthew J. Fuchter
- Molecular Sciences Research Hub, Department of Chemistry, Imperial College London, Wood Lane, London W12 0BZ, United Kingdom
| | - Grace G. D. Han
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02453, United States
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34
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Jayakumar J, Vedarethinam G, Hsiao H, Sun S, Chuang S. Cascade One‐Pot Synthesis of Orange‐Red‐Fluorescent Polycyclic Cinnolino[2,3‐
f
]phenanthridin‐9‐ium Salts by Palladium(II)‐Catalyzed C−H Bond Activation of 2‐Azobiaryl Compounds and Alkenes. Angew Chem Int Ed Engl 2020; 59:689-694. [DOI: 10.1002/anie.201910959] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Indexed: 12/24/2022]
Affiliation(s)
| | | | - Huan‐Chang Hsiao
- Department of Applied ChemistryNational Chiao Tung University Hsinchu 30010 Taiwan
| | - Shang‐You Sun
- Department of Applied ChemistryNational Chiao Tung University Hsinchu 30010 Taiwan
| | - Shih‐Ching Chuang
- Department of Applied ChemistryNational Chiao Tung University Hsinchu 30010 Taiwan
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35
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Saha D, Das P, Biswas P, Guin J. Synthesis of Phenolic Compounds via Palladium Catalyzed C−H Functionalization of Arenes. Chem Asian J 2019; 14:4534-4548. [DOI: 10.1002/asia.201901073] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Revised: 10/31/2019] [Indexed: 12/29/2022]
Affiliation(s)
- Debajyoti Saha
- Department of ChemistryKrishnagar Govt. College Krishnagar Nadia 741101 India
| | - Prasenjit Das
- School of Chemical SciencesIndian Association for the Cultivation of Science 2A & 2B Raja S. C. Mullick Road Jadavpur Kolkata 700032 India
| | - Promita Biswas
- School of Chemical SciencesIndian Association for the Cultivation of Science 2A & 2B Raja S. C. Mullick Road Jadavpur Kolkata 700032 India
| | - Joyram Guin
- School of Chemical SciencesIndian Association for the Cultivation of Science 2A & 2B Raja S. C. Mullick Road Jadavpur Kolkata 700032 India
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36
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Jayakumar J, Vedarethinam G, Hsiao H, Sun S, Chuang S. Cascade One‐Pot Synthesis of Orange‐Red‐Fluorescent Polycyclic Cinnolino[2,3‐
f
]phenanthridin‐9‐ium Salts by Palladium(II)‐Catalyzed C−H Bond Activation of 2‐Azobiaryl Compounds and Alkenes. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201910959] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
| | | | - Huan‐Chang Hsiao
- Department of Applied ChemistryNational Chiao Tung University Hsinchu 30010 Taiwan
| | - Shang‐You Sun
- Department of Applied ChemistryNational Chiao Tung University Hsinchu 30010 Taiwan
| | - Shih‐Ching Chuang
- Department of Applied ChemistryNational Chiao Tung University Hsinchu 30010 Taiwan
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37
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Gryaznova TV, Kholin KV, Nikanshina EO, Khrizanforova VV, Strekalova SO, Fayzullin RR, Budnikova YH. Copper or Silver-Mediated Oxidative C(sp2)–H/N–H Cross-Coupling of Phthalimide and Heterocyclic Arenes: Access to N-Arylphthalimides. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00443] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Tatyana V. Gryaznova
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Arbuzov str. 8, Kazan 420088, Russian Federation
| | - Kirill V. Kholin
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Arbuzov str. 8, Kazan 420088, Russian Federation
| | - Elizaveta O. Nikanshina
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Arbuzov str. 8, Kazan 420088, Russian Federation
| | - Vera V. Khrizanforova
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Arbuzov str. 8, Kazan 420088, Russian Federation
| | - Sofia O. Strekalova
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Arbuzov str. 8, Kazan 420088, Russian Federation
| | - Robert R. Fayzullin
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Arbuzov str. 8, Kazan 420088, Russian Federation
| | - Yulia H. Budnikova
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Arbuzov str. 8, Kazan 420088, Russian Federation
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38
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Subhedar DD, Mishra AA, Bhanage BM. N
‐Methoxybenzamide: A Versatile Directing Group for Palladium‐, Rhodium‐ and Ruthenium‐Catalyzed C−H Bond Activations. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900405] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
| | - Ashish A. Mishra
- Department of ChemistryInstitute of Chemical Technology, Matunga Mumbai 400019 India
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39
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Xiao Y, Wu X, Wang H, Sun S, Yu JT, Cheng J. Rhodium-Catalyzed Reaction of Azobenzenes and Nitrosoarenes toward Phenazines. Org Lett 2019; 21:2565-2568. [DOI: 10.1021/acs.orglett.9b00502] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Yan Xiao
- School of Petrochemical Engineering, and Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, Changzhou University, Changzhou 213164, P.R. China
| | - Xiaopeng Wu
- School of Petrochemical Engineering, and Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, Changzhou University, Changzhou 213164, P.R. China
| | - Hepan Wang
- School of Petrochemical Engineering, and Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, Changzhou University, Changzhou 213164, P.R. China
| | - Song Sun
- School of Petrochemical Engineering, and Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, Changzhou University, Changzhou 213164, P.R. China
| | - Jin-Tao Yu
- School of Petrochemical Engineering, and Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, Changzhou University, Changzhou 213164, P.R. China
| | - Jiang Cheng
- School of Petrochemical Engineering, and Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, Changzhou University, Changzhou 213164, P.R. China
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40
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Zhang Y, Huang C, Lin X, Hu Q, Hu B, Zhou Y, Zhu G. Modular Synthesis of Alkylarylazo Compounds via Iron(III)-Catalyzed Olefin Hydroamination. Org Lett 2019; 21:2261-2264. [PMID: 30869900 DOI: 10.1021/acs.orglett.9b00540] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A novel Fe-catalyzed olefin hydroamination with aryldiazo sulfones for accessing alkylarylazo compounds has been successfully developed. Aryldiazo sulfones are used as radical acceptors, and N-N double bonds will be regenerated when an arene sulfonyl group leaves. The reaction features mild reaction conditions and a broad substrate scope, allowing access to many azo compounds that would be difficult or perhaps impossible to access using other methods.
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Affiliation(s)
- Yan Zhang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials , Zhejiang Normal University , 688 Yingbin Road , Jinhua 321004 , China
| | - Chenchao Huang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials , Zhejiang Normal University , 688 Yingbin Road , Jinhua 321004 , China
| | - Xinru Lin
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials , Zhejiang Normal University , 688 Yingbin Road , Jinhua 321004 , China
| | - Qi Hu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials , Zhejiang Normal University , 688 Yingbin Road , Jinhua 321004 , China
| | - Boyue Hu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials , Zhejiang Normal University , 688 Yingbin Road , Jinhua 321004 , China
| | - Yulu Zhou
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials , Zhejiang Normal University , 688 Yingbin Road , Jinhua 321004 , China
| | - Gangguo Zhu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials , Zhejiang Normal University , 688 Yingbin Road , Jinhua 321004 , China
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41
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Kianmehr E, Nasab SB. Ruthenium-Catalyzed Regioselective Direct Ortho
-Acyloxylation of Azoarenes with Carboxylic Acids via C-H Bond Activation. European J Org Chem 2019. [DOI: 10.1002/ejoc.201801545] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Ebrahim Kianmehr
- School of Chemistry; College of Science; University of Tehran; Tehran Iran
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42
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Hoffmann J, Kuczmera TJ, Lork E, Staubitz A. Synthesis, Structure, Thermal Behavior and cis/ trans Isomerization of 2,2'-(EMe₃)₂ (E = C, Si, Ge, Sn) Substituted Azobenzenes. MOLECULES (BASEL, SWITZERLAND) 2019; 24:molecules24020303. [PMID: 30650637 PMCID: PMC6359049 DOI: 10.3390/molecules24020303] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 01/09/2019] [Accepted: 01/11/2019] [Indexed: 12/19/2022]
Abstract
The synthesis of a series of 2,2′-bis(trimethyltetrel) azobenzenes is reported, evaluating the different synthetic approaches that different group 14 element substituents individually require. The synthetic access to the carbon substituted congener is very different from the heavier tetrels, in that the key step is the formation of the N=N bond in azobenzene, rather than the azobenzene-C bond. Sn could be introduced with a cross-coupling route, whereas the Si and Ge congeners were prepared by a stannylation-lithiation-electrophilic quenching sequence. Iodo-lithium exchange was also a possible route to obtain the dilithiated species, which can be attributed to the chelating effect of the nitrogen atoms. However, the organo-lead species could not be obtained via these routes. The resulting structures were fully characterized (NMR, FTIR, HRMS and XRD). Furthermore, their thermal properties (TGA and DSC) and their photoswitching behavior in solution (UV-VIS & NMR experiments) were investigated and compared for the different tetrels (C, Si, Ge, Sn).
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Affiliation(s)
- Jonas Hoffmann
- Institute for Analytical and Organic Chemistry, University of Bremen, Leobener Straße 7, D-28359 Bremen, Germany.
- MAPEX Center for Materials and Processes, University of Bremen, Bibliothekstraße 1, D-28359 Bremen, Germany.
- Otto-Diels-Institute for Organic Chemistry, University of Kiel, Otto-Hahn-Platz 4, D-24098 Kiel, Germany.
- Université Rennes, CNRS, ISCR-UMR 6226, 263 Av. du Général Leclerc, F-35042 Rennes, France.
| | - Thomas Josef Kuczmera
- Institute for Analytical and Organic Chemistry, University of Bremen, Leobener Straße 7, D-28359 Bremen, Germany.
| | - Enno Lork
- Institute for Inorganic Chemistry and Crystallography, University of Bremen, Leobener Straße 7, 28359 D-Bremen, Germany.
| | - Anne Staubitz
- Institute for Analytical and Organic Chemistry, University of Bremen, Leobener Straße 7, D-28359 Bremen, Germany.
- MAPEX Center for Materials and Processes, University of Bremen, Bibliothekstraße 1, D-28359 Bremen, Germany.
- Otto-Diels-Institute for Organic Chemistry, University of Kiel, Otto-Hahn-Platz 4, D-24098 Kiel, Germany.
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43
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Chen J, Lv S, Tian S. Electrochemical Transition-Metal-Catalyzed C-H Bond Functionalization: Electricity as Clean Surrogates of Chemical Oxidants. CHEMSUSCHEM 2019; 12:115-132. [PMID: 30280508 DOI: 10.1002/cssc.201801946] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 10/01/2018] [Indexed: 06/08/2023]
Abstract
Transition-metal-catalyzed C-H activation has attracted much attention from the organic synthetic community because it obviates the need to prefunctionalize substrates. However, superstoichiometric chemical oxidants, such as copper- or silver-based metal oxidants, benzoquinones, organic peroxides, K2 S2 O8 , hypervalent iodine, and O2 , are required for most of the reactions. Thus, the development of environmentally benign and user-friendly C-H bond activation protocols, in the absence of chemical oxidants, are urgently desired. The inherent advantages and unique characteristics of organic electrosynthesis make fill this gap. Herein, recent progress in this area (until the end of September 2018) is summarized for different transition metals to highlight the potential sustainability of electro-organic chemistry.
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Affiliation(s)
- Jianbin Chen
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353, PR China
| | - Shide Lv
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353, PR China
| | - Siyu Tian
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353, PR China
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44
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Mao YJ, Luo G, Hao HY, Xu ZY, Lou SJ, Xu DQ. Anion ligand promoted selective C–F bond reductive elimination enables C(sp2)–H fluorination. Chem Commun (Camb) 2019; 55:14458-14461. [DOI: 10.1039/c9cc07726j] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
A detailed mechanism study on the anion ligand promoted selective C–H bond fluorination is reported.
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Affiliation(s)
- Yang-Jie Mao
- College of Chemical Engineering
- Catalytic Hydrogenation Research Center
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology
- Zhejiang University of Technology
- Hangzhou 310014
| | - Gen Luo
- State Key Laboratory of Fine Chemicals
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Hong-Yan Hao
- College of Chemical Engineering
- Catalytic Hydrogenation Research Center
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology
- Zhejiang University of Technology
- Hangzhou 310014
| | - Zhen-Yuan Xu
- College of Chemical Engineering
- Catalytic Hydrogenation Research Center
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology
- Zhejiang University of Technology
- Hangzhou 310014
| | - Shao-Jie Lou
- College of Chemical Engineering
- Catalytic Hydrogenation Research Center
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology
- Zhejiang University of Technology
- Hangzhou 310014
| | - Dan-Qian Xu
- College of Chemical Engineering
- Catalytic Hydrogenation Research Center
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology
- Zhejiang University of Technology
- Hangzhou 310014
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45
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Zhao H, Ma G, Xie X, Wang Y, Hao J, Wan W. Pd(ii)-Catalyzed decarboxylative meta-C–H difluoromethylation. Chem Commun (Camb) 2019; 55:3927-3930. [DOI: 10.1039/c9cc00984a] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Palladium(ii)-catalyzed decarboxylative meta-C–H difluoromethylation reactions have been developed. Initial mechanistic studies disclosed that a migratory insertion would be involved in this meta-selective C–H functionalization.
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Affiliation(s)
- Huaxin Zhao
- Department of Chemistry
- Shanghai University
- Shanghai
- China
| | - Guobin Ma
- School of Science
- Shanghai University
- China
| | - Xiaojuan Xie
- Department of Chemistry
- Shanghai University
- Shanghai
- China
| | - Yong Wang
- Department of Chemistry
- Shanghai University
- Shanghai
- China
| | - Jian Hao
- Department of Chemistry
- Shanghai University
- Shanghai
- China
| | - Wen Wan
- Department of Chemistry
- Shanghai University
- Shanghai
- China
- Key Laboratory of Organofluorine Chemistry
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46
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Borah G, Patel P. Ir(iii)-Catalyzed [4 + 2] cyclization of azobenzene and diazotized Meldrum's acid for the synthesis of cinnolin-3(2H)-one. Org Biomol Chem 2019; 17:2554-2563. [DOI: 10.1039/c8ob03214a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The first report on Ir(iii)-catalyzed C–H alkylation/cyclization of azobenzene with diazotized Meldrum's acid was developed for the synthesis of cinnoline-3(2H)-one-4-carboxylic acid and its ester derivative under mild conditions.
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Affiliation(s)
- Gongutri Borah
- Chemical Science and Technology Division
- CSIR-North East Institute of Science and Technology
- Jorhat
- India-785006
- Academy of Scientific and Innovative Research (AcSIR)
| | - Pitambar Patel
- Chemical Science and Technology Division
- CSIR-North East Institute of Science and Technology
- Jorhat
- India-785006
- Academy of Scientific and Innovative Research (AcSIR)
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47
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Zhu L, Mohamed H, Yuan H, Zhang J. The control effects of different scaffolds in chiral phosphoric acids: a case study of enantioselective asymmetric arylation. Catal Sci Technol 2019. [DOI: 10.1039/c9cy01420a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
DFT calculations disclosed that the sign of enantioselectivity in chiral-phosphoric-acid catalyzed reactions can be tuned by BINOL- or SPINOL-derived backbones.
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Affiliation(s)
- Lihan Zhu
- Faculty of Chemistry
- Northeast Normal University
- Changchun
- P. R. China
| | - Hend Mohamed
- Faculty of Chemistry
- Northeast Normal University
- Changchun
- P. R. China
| | - Haiyan Yuan
- Faculty of Chemistry
- Northeast Normal University
- Changchun
- P. R. China
| | - Jingping Zhang
- Faculty of Chemistry
- Northeast Normal University
- Changchun
- P. R. China
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48
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Hu Y, Wang M, Li P, Li H, Wang L. A Highly Efficient Copper‐Catalyzed C(sp2)−H Alkoxylation of the Benzamide Enabled by A Bidendate Directing Group. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800664] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Yu Hu
- Department of ChemistryHuaibei Normal University, Huaibei Anhui 235000 P.R. China
| | - Min Wang
- Department of ChemistryHuaibei Normal University, Huaibei Anhui 235000 P.R. China
| | - Pinhua Li
- Department of ChemistryHuaibei Normal University, Huaibei Anhui 235000 P.R. China
| | - Hongji Li
- Department of ChemistryHuaibei Normal University, Huaibei Anhui 235000 P.R. China
| | - Lei Wang
- State Key Laboratory of Organometallic ChemistryShanghai Institute of Organic Chemistry Shanghai 200032 People's Republic of China
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49
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Zhang S, Wang B, Jia X, Yuan Y. Rhodium‐Catalyzed Cascade Annulation Reaction
via
C−H Activation of Azobenzenes with Terminal Alkynes: A Synthesis of Indolo[1,2‐
b
]cinnolines. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201801183] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Shuwei Zhang
- School of Chemistry and Chemical EngineeringYangzhou University Yangzhou 225002 People's Republic of China
| | - Biying Wang
- School of Chemistry and Chemical EngineeringYangzhou University Yangzhou 225002 People's Republic of China
| | - Xiaodong Jia
- School of Chemistry and Chemical EngineeringYangzhou University Yangzhou 225002 People's Republic of China
| | - Yu Yuan
- School of Chemistry and Chemical EngineeringYangzhou University Yangzhou 225002 People's Republic of China
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50
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Adams RD, Akter H, Smith MD, Tedder JD. The coordination and activation of azobenzene by Ru5(μ5-C) cluster complexes. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.10.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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