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Abstract
Nitroxides, also known as nitroxyl radicals, are long-lived or stable radicals with the general structure R1R2N-O•. The spin distribution over the nitroxide N and O atoms contributes to the thermodynamic stability of these radicals. The presence of bulky N-substituents R1 and R2 prevents nitroxide radical dimerization, ensuring their kinetic stability. Despite their reactivity toward various transient C radicals, some nitroxides can be easily stored under air at room temperature. Furthermore, nitroxides can be oxidized to oxoammonium salts (R1R2N═O+) or reduced to anions (R1R2N-O-), enabling them to act as valuable oxidants or reductants depending on their oxidation state. Therefore, they exhibit interesting reactivity across all three oxidation states. Due to these fascinating properties, nitroxides find extensive applications in diverse fields such as biochemistry, medicinal chemistry, materials science, and organic synthesis. This review focuses on the versatile applications of nitroxides in organic synthesis. For their use in other important fields, we will refer to several review articles. The introductory part provides a brief overview of the history of nitroxide chemistry. Subsequently, the key methods for preparing nitroxides are discussed, followed by an examination of their structural diversity and physical properties. The main portion of this review is dedicated to oxidation reactions, wherein parent nitroxides or their corresponding oxoammonium salts serve as active species. It will be demonstrated that various functional groups (such as alcohols, amines, enolates, and alkanes among others) can be efficiently oxidized. These oxidations can be carried out using nitroxides as catalysts in combination with various stoichiometric terminal oxidants. By reducing nitroxides to their corresponding anions, they become effective reducing reagents with intriguing applications in organic synthesis. Nitroxides possess the ability to selectively react with transient radicals, making them useful for terminating radical cascade reactions by forming alkoxyamines. Depending on their structure, alkoxyamines exhibit weak C-O bonds, allowing for the thermal generation of C radicals through reversible C-O bond cleavage. Such thermally generated C radicals can participate in various radical transformations, as discussed toward the end of this review. Furthermore, the application of this strategy in natural product synthesis will be presented.
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Affiliation(s)
- Dirk Leifert
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstrasse 40, 48149 Münster, Germany
| | - Armido Studer
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstrasse 40, 48149 Münster, Germany
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2
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Le Pham NS, Kwon Y, Shin H, Sohn JH. Copper-promoted dehydrosulfurative carbon-nitrogen cross-coupling with concomitant aromatization for synthesis of 2-aminopyrimidines. RSC Adv 2022; 13:172-177. [PMID: 36605669 PMCID: PMC9764426 DOI: 10.1039/d2ra05180j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Accepted: 12/14/2022] [Indexed: 01/07/2023] Open
Abstract
Copper-promoted dehydrosulfurative C-N cross-coupling of 3,4-dihydropyrimidin-1H-2-thione with amine accompanied by concomitant aromatization to generate 2-aryl(alkyl)aminopyrimidine derivatives is described. The reaction proceeded well with a wide range of thiono substrates and aryl/aliphatic amines as the coupling partners, offering efficient access to biologically and pharmacologically valuable 2-aryl(alkyl)aminopyrimidines with rapid diversification.
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Affiliation(s)
- Ngoc Son Le Pham
- Department of Chemistry, Chungnam National UniversityDaejeon 34134Republic of Korea
| | - Yujeong Kwon
- Department of Chemistry, Chungnam National UniversityDaejeon 34134Republic of Korea
| | - Hyunik Shin
- Yonsung Fine Chemicals R&D CenterSuwon 16675Republic of Korea
| | - Jeong-Hun Sohn
- Department of Chemistry, Chungnam National UniversityDaejeon 34134Republic of Korea
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3
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Gawdzik B, Kowalczyk P, Koszelewski D, Brodzka A, Masternak J, Kramkowski K, Wypych A, Ostaszewski R. The Evaluation of DHPMs as Biotoxic Agents on Pathogen Bacterial Membranes. MEMBRANES 2022; 12:membranes12020238. [PMID: 35207159 PMCID: PMC8878598 DOI: 10.3390/membranes12020238] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 02/08/2022] [Accepted: 02/15/2022] [Indexed: 12/04/2022]
Abstract
Herein, we present biological studies on 3,4-dihydropyrimidin-2(1H)-ones (DHPMs) obtained via Biginelli reaction catalyzed by NH4Cl under solvent-free conditions. Until now, DHPMs have not been tested for biological activity against pathogenic E. coli strains. We tested 16 newly synthesized DHPMs as antimicrobial agents on model E. coli strains (K12 and R2–R4). Preliminary cellular studies using MIC and MBC tests and digestion of Fpg after modification of bacterial DNA suggest that these compounds may have greater potential as antibacterial agents than typically used antibiotics, such as ciprofloxacin (ci), bleomycin (b) and cloxacillin (cl). The described compounds are highly specific for pathogenic E. coli strains based on the model strains used and may be engaged in the future as new substitutes for commonly used antibiotics in clinical and nosocomial infections in the pandemic era.
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Affiliation(s)
- Barbara Gawdzik
- Institute of Chemistry, Jan Kochanowski University, Uniwersytecka 7, 25-406 Kielce, Poland;
- Correspondence: (B.G.); (P.K.)
| | - Paweł Kowalczyk
- Department of Animal Nutrition, The Kielanowski Institute of Animal Physiology and Nutrition, Polish Academy of Sciences, Instytucka 3, 05-110 Jabłonna, Poland
- Correspondence: (B.G.); (P.K.)
| | - Dominik Koszelewski
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland; (D.K.); (A.B.); (R.O.)
| | - Anna Brodzka
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland; (D.K.); (A.B.); (R.O.)
| | - Joanna Masternak
- Institute of Chemistry, Jan Kochanowski University, Uniwersytecka 7, 25-406 Kielce, Poland;
| | - Karol Kramkowski
- Department of Physical Chemistry, Medical University of Bialystok, Kilińskiego 1 Str., 15-089 Białystok, Poland;
| | - Aleksandra Wypych
- Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University in Torun, ul. Wileńska 4, 87-100 Toruń, Poland;
| | - Ryszard Ostaszewski
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland; (D.K.); (A.B.); (R.O.)
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4
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Aggarwal R, Singh G, Kumar S. Molecular iodine mediated transition-metal-free oxidative dehydrogenation of 4,7-dihydropyrazolo[3,4-b]pyridines. SYNTHETIC COMMUN 2021. [DOI: 10.1080/00397911.2021.1985142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Ranjana Aggarwal
- CSIR-National Institute of Science Communication and Policy Research (CSIR-NIScPR) Pusa Gate, K.S. Krishnan Marg, New Delhi, India
- Department of Chemistry, Kurukshetra University, Kurukshetra, India
| | - Gulshan Singh
- Department of Chemistry, Kurukshetra University, Kurukshetra, India
| | - Suresh Kumar
- Department of Chemistry, Kurukshetra University, Kurukshetra, India
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5
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Phan TNH, Lee J, Shin H, Sohn JH. Oxidative Dehydrosulfurative Carbon-Oxygen Cross-Coupling of 3,4-Dihydropyrimidine-2-thiones with Aryl Alcohols. J Org Chem 2021; 86:5423-5430. [PMID: 33764055 DOI: 10.1021/acs.joc.1c00273] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A Pd-catalyzed/Cu-mediated oxidative dehydrosulfurative carbon-oxygen cross-coupling reaction of 3,4-dihydropyrimidin-1H-2-thiones (DHPMs) with aryl alcohols is described. Due to the ready availability of diverse DHPMs and aryl alcohols, the reaction method offers facile access to biologically and pharmacologically valuable 2-aryloxypyrimidine derivatives with rapid diversification.
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Affiliation(s)
- Trong Nguyen Huu Phan
- Department of Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Jihong Lee
- Department of Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Hyunik Shin
- Yonsung Fine Chemicals R&D Center, Suwon 16675, Republic of Korea
| | - Jeong-Hun Sohn
- Department of Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
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6
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Lee J, Kwon Y, Lee DC, Sohn JH. Aerobic copper-promoted oxidative dehydrosulfurative carbon–oxygen cross-coupling of 3,4-dihydropyrimidine-1 H-2-thiones with alcohols. RSC Adv 2021; 11:36821-36825. [PMID: 35494373 PMCID: PMC9043584 DOI: 10.1039/d1ra07713a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Accepted: 11/09/2021] [Indexed: 12/02/2022] Open
Abstract
An aerobic Cu-promoted oxidative dehydrosulfurative carbon–oxygen cross-coupling of 3,4-dihydropyrimidin-1H-2-thiones (DHPMs) with both aliphatic and aromatic alcohols is described. Together with the ready availability of DHPMs and both alcohols, the method furnishes facile access to biologically valuable 2-alkoxypyrimidines with rapid diversification. A wide range of readily available DHPMs and alcohols makes the presented reaction an attractive method to access biologically valuable 2-alkoxypyrimidine derivatives with rapid diversification.![]()
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Affiliation(s)
- Jihong Lee
- Department of Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Yujeong Kwon
- Department of Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Dong-Chan Lee
- Department of Chemistry and Biochemistry, University of Nevada Las Vegas, 4505 S. Maryland Parkway, Box 454003, Las Vegas, Nevada 89154-4003, USA
| | - Jeong-Hun Sohn
- Department of Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
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7
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Godugu K, Yadala VDS, Pinjari MKM, Gundala TR, Sanapareddy LR, Nallagondu CGR. Natural dolomitic limestone-catalyzed synthesis of benzimidazoles, dihydropyrimidinones, and highly substituted pyridines under ultrasound irradiation. Beilstein J Org Chem 2020; 16:1881-1900. [PMID: 32802206 PMCID: PMC7404249 DOI: 10.3762/bjoc.16.156] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 07/23/2020] [Indexed: 12/21/2022] Open
Abstract
Natural dolomitic limestone (NDL) is employed as a heterogeneous green catalyst for the synthesis of medicinally valuable benzimidazoles, dihydropyrimidinones, and highly functionalized pyridines via C–N, C–C, and C–S bond formations in a mixture of ethanol and H2O under ultrasound irradiation. The catalyst is characterized by XRD, FTIR, Raman spectroscopy, SEM, and EDAX analysis. The main advantages of this methodology include the wide substrate scope, cleaner reaction profile, short reaction times, and excellent isolated yields. The products do not require chromatographic purification, and the catalyst can be reused seven times. Therefore, the catalyst is a greener alternative for the synthesis of the above N-heterocycles compared to the existing reported catalysts.
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Affiliation(s)
- Kumar Godugu
- Department of Chemistry, Green and Sustainable Synthetic Organic Chemistry Laboratory, Yogi Vemana University, Kadapa-516 005, Andhra Pradesh, India
| | - Venkata Divya Sri Yadala
- Department of Chemistry, Green and Sustainable Synthetic Organic Chemistry Laboratory, Yogi Vemana University, Kadapa-516 005, Andhra Pradesh, India
| | - Mohammad Khaja Mohinuddin Pinjari
- Department of Chemistry, Green and Sustainable Synthetic Organic Chemistry Laboratory, Yogi Vemana University, Kadapa-516 005, Andhra Pradesh, India
| | - Trivikram Reddy Gundala
- Department of Chemistry, Green and Sustainable Synthetic Organic Chemistry Laboratory, Yogi Vemana University, Kadapa-516 005, Andhra Pradesh, India
| | | | - Chinna Gangi Reddy Nallagondu
- Department of Chemistry, Green and Sustainable Synthetic Organic Chemistry Laboratory, Yogi Vemana University, Kadapa-516 005, Andhra Pradesh, India
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8
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Zuo S, Liu J, Zuo A.
N
‐Hydroxy
‐1,6‐methano[10]annulene‐3,4‐dicarboximide/Co(
OAc
)
2
: A novel catalytic system for the aerobic oxidation of alkylarenes. J Heterocycl Chem 2020. [DOI: 10.1002/jhet.3971] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Shengli Zuo
- State Key Laboratory of Chemical Resource Engineering, Department of Applied Chemistry, College of ChemistryBeijing University of Chemical Technology Beijing China
| | - Jianjun Liu
- State Key Laboratory of Chemical Resource Engineering, Department of Applied Chemistry, College of ChemistryBeijing University of Chemical Technology Beijing China
| | - Ang Zuo
- Department of Chemistry and BiochemistryUniversity of Notre Dame Notre Dame Indiana USA
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9
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Le Pham NS, Shin H, Kang JY, Sohn JH. Oxidative Dehydrosulfurative Cross-Coupling of 3,4-Dihydropyrimidine-2-thiones with Alkynes for Access to 2-Alkynylpyrimidines. J Org Chem 2020; 85:5087-5096. [PMID: 32159960 DOI: 10.1021/acs.joc.0c00091] [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
A reaction method is described for the one-step synthesis of 2-alkynylpyrimidines from 3,4-dihydropyrimidin-1H-2-thiones (DHPMs) via dehydrosulfurative Sonogashira cross-coupling with concomitant oxidative dehydrogenation using a Pd/Cu catalytic system. Together with the ready availability of DHPMs possessing various substituents at the C4-C6 positions, this transformation offers rapid and general access to diverse 2-alkynylpyrimidine derivatives.
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Affiliation(s)
- Ngoc Son Le Pham
- Department of Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Hyunik Shin
- Yonsung Fine Chemicals R&D Center, Suwon 16675, Republic of Korea
| | - Jun Yong Kang
- Department of Chemistry and Biochemistry, University of Nevada, Las Vegas, 4505 South Maryland Parkway, Las Vegas, Nevada 89154-4003, United States
| | - Jeong-Hun Sohn
- Department of Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
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10
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Kim H, Lee J, Shin H, Sohn JH. Boric Ester and Thiourea as Coupling Partners in a Copper-Mediated Oxidative Dehydrosulfurative Carbon–Oxygen Cross-Coupling Reaction. Org Lett 2018; 20:1961-1965. [DOI: 10.1021/acs.orglett.8b00502] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hyeji Kim
- Department of Chemistry, College of Natural Sciences, Chungnam National University, Dajeon 305-706, Korea
| | - Jihong Lee
- Department of Chemistry, College of Natural Sciences, Chungnam National University, Dajeon 305-706, Korea
| | - Hyunik Shin
- Yonsung Fine Chemicals R&D Center, 602 Innoplex 2, 306 Sinwon-ro, Yeongtong-gu, Suwon 443-380 Korea
| | - Jeong-Hun Sohn
- Department of Chemistry, College of Natural Sciences, Chungnam National University, Dajeon 305-706, Korea
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11
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Kim H, Phan NHT, Shin H, Lee HS, Sohn JH. Dehydrosulfurative arylation with concomitant oxidative dehydrogenation for rapid access to pyrimidine derivatives. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.10.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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12
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Baji Á, Kiss T, Wölfling J, Kovács D, Igaz N, Gopisetty MK, Kiricsi M, Frank É. Multicomponent access to androstano-arylpyrimidines under microwave conditions and evaluation of their anti-cancer activity in vitro. J Steroid Biochem Mol Biol 2017; 172:79-88. [PMID: 28595942 DOI: 10.1016/j.jsbmb.2017.06.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Revised: 06/01/2017] [Accepted: 06/04/2017] [Indexed: 11/17/2022]
Abstract
Novel ring D- and A-fused pyrimidines in the androstane series were efficiently synthesized within 10-15min in polar protic solvents under microwave irradiation via two kinds of multicomponent heterocyclization reactions followed by spontaneous or promoted oxidation. The rates of the one-pot catalyst-free transformations of steroidal β-ketoaldehydes, ammonium acetate and substituted benzaldehydes in EtOH were found to be affected slightly by the steric and electronic feature of the substituents on the aromatic ring of the arylaldehyde component and the different reactivities of rings D and A of the sterane core. At the same time, the acid-catalyzed Biginelli-type reaction of dihydrotestosterone acetate, urea and arylaldehydes, and subsequent Jones oxidation of the primarily formed dihydropyrimidinones led to the corresponding ring A-fused 1H-pyrimidin-2-ones in moderate yields independently of the substituents on the aromatic moiety. The synthesized compounds were tested in vitro on human cancer cell lines as well as on non-cancerous fibroblast cells by the MTT assay in order to investigate their biological effects. As a result of the pharmacological screen, a remarkable structure-function relationship has been observed as the acetylated Biginelli products exhibited higher toxicity compared to the deacetylated version of each compound. Furthermore, in case of three 2'-arylpyrimidine derivatives a strong prostate cancer cell specific activity has been identified.
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Affiliation(s)
- Ádám Baji
- Department of Organic Chemistry, University of Szeged, Dóm tér 8., H-6720 Szeged, Hungary
| | - Tamás Kiss
- Department of Organic Chemistry, University of Szeged, Dóm tér 8., H-6720 Szeged, Hungary
| | - János Wölfling
- Department of Organic Chemistry, University of Szeged, Dóm tér 8., H-6720 Szeged, Hungary
| | - Dávid Kovács
- Department of Biochemistry and Molecular Biology, University of Szeged, Közép fasor 52., H-6726 Szeged, Hungary
| | - Nóra Igaz
- Department of Biochemistry and Molecular Biology, University of Szeged, Közép fasor 52., H-6726 Szeged, Hungary
| | - Mohana Krishna Gopisetty
- Department of Biochemistry and Molecular Biology, University of Szeged, Közép fasor 52., H-6726 Szeged, Hungary
| | - Mónika Kiricsi
- Department of Biochemistry and Molecular Biology, University of Szeged, Közép fasor 52., H-6726 Szeged, Hungary
| | - Éva Frank
- Department of Organic Chemistry, University of Szeged, Dóm tér 8., H-6720 Szeged, Hungary.
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13
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Phukan A, Borah SJ, Bordoloi P, Sharma K, Borah BJ, Sarmah PP, Dutta DK. An efficient and robust heterogeneous mesoporous montmorillonite clay catalyst for the Biginelli type reactions. ADV POWDER TECHNOL 2017. [DOI: 10.1016/j.apt.2017.03.030] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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14
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Chen K, Xie H. Selective aerobic oxidation promoted by highly efficient multi-nitroxy organocatalysts. CHINESE JOURNAL OF CATALYSIS 2017. [DOI: 10.1016/s1872-2067(17)62777-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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15
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Liu XJ, Wang WP, Huo CD, Wang XC, Quan ZJ. Palladium-catalyzed dehydrogenation of dihydro-heterocycles using isoprene as the hydrogen acceptor without oxidants. Catal Sci Technol 2017. [DOI: 10.1039/c6cy02038k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient and general method for Pd-catalyzed dehydrogenative aromatization of dihydro-heteroatom compounds without external O2 and H2 is first described.
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Affiliation(s)
- Xiao-Jun Liu
- Key Laboratory of Eco-Environment-Related Polymer Materials
- Ministry of Education
- Gansu Key Laboratory of Polymer Materials
- College of Chemistry and Chemical Engineering
- Northwest Normal University
| | - Wen-Peng Wang
- Key Laboratory of Eco-Environment-Related Polymer Materials
- Ministry of Education
- Gansu Key Laboratory of Polymer Materials
- College of Chemistry and Chemical Engineering
- Northwest Normal University
| | - Cong-De Huo
- Key Laboratory of Eco-Environment-Related Polymer Materials
- Ministry of Education
- Gansu Key Laboratory of Polymer Materials
- College of Chemistry and Chemical Engineering
- Northwest Normal University
| | - Xi-Cun Wang
- Key Laboratory of Eco-Environment-Related Polymer Materials
- Ministry of Education
- Gansu Key Laboratory of Polymer Materials
- College of Chemistry and Chemical Engineering
- Northwest Normal University
| | - Zheng-Jun Quan
- Key Laboratory of Eco-Environment-Related Polymer Materials
- Ministry of Education
- Gansu Key Laboratory of Polymer Materials
- College of Chemistry and Chemical Engineering
- Northwest Normal University
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16
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Wang P, Lu TT, Lu M. A Green and Effective Approach of Two-Step 2,2′,4,4′,6,6′-Hexanitrostilbene Preparation and Its Industrial Scale Study. Org Process Res Dev 2016. [DOI: 10.1021/acs.oprd.5b00422] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Pengcheng Wang
- School
of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, People’s Republic of China
| | - Ting-ting Lu
- School
of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, People’s Republic of China
- Xi’an Modern Chemistry Research Institute, Xi’an 710065, People’s Republic of China
| | - Ming Lu
- School
of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, People’s Republic of China
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17
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Aryan R, Nojavan M, Sadeghi F. A New Facile, High Yielding and Efficient Protocol for the Synthesis of Novel 4-Phenylsulfonamido-6-Aryl-2-Phenylpyrimidine-5-Carbonitrile Derivatives. PHOSPHORUS SULFUR 2015. [DOI: 10.1080/10426507.2015.1050017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Reza Aryan
- Department of Chemistry, Faculty of Science, University of Zabol, P.O. Box 9861335856, Zabol, Iran
| | - Masoomeh Nojavan
- Department of Chemistry, Faculty of Science, University of Zabol, P.O. Box 9861335856, Zabol, Iran
| | - Fatemeh Sadeghi
- Department of Chemistry, Faculty of Science, University of Zabol, P.O. Box 9861335856, Zabol, Iran
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18
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Han R, He L, Liu L, Xie X, She X. An Upstream By-product from Ester Activation via NHC-Catalysis Catalyzes Downstream Sulfonyl Migration Reaction. Chem Asian J 2015; 11:193-7. [DOI: 10.1002/asia.201500959] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Revised: 10/13/2015] [Indexed: 11/07/2022]
Affiliation(s)
- Runfeng Han
- State Key Laboratory of Applied Organic Chemistry; College of Chemistry and Chemical Engineering; Lanzhou University; Lanzhou, Gansu 730000 P.R. China
| | - Liwenze He
- State Key Laboratory of Applied Organic Chemistry; College of Chemistry and Chemical Engineering; Lanzhou University; Lanzhou, Gansu 730000 P.R. China
| | - Lin Liu
- State Key Laboratory of Applied Organic Chemistry; College of Chemistry and Chemical Engineering; Lanzhou University; Lanzhou, Gansu 730000 P.R. China
| | - Xingang Xie
- State Key Laboratory of Applied Organic Chemistry; College of Chemistry and Chemical Engineering; Lanzhou University; Lanzhou, Gansu 730000 P.R. China
| | - Xuegong She
- State Key Laboratory of Applied Organic Chemistry; College of Chemistry and Chemical Engineering; Lanzhou University; Lanzhou, Gansu 730000 P.R. China
- Collaborative Innovation Centre of Chemical Science and Engineering; Tianjin 300071 P.R. China
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19
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Copper-catalyzed aerobic cascade reaction for the conversion of 3,4-dihydropyrimidine-2(1H)-thiones to arylthiopyrimidines. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.03.031] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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20
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Phan NHT, Sohn JH. Copper-catalyzed aerobic oxidative dehydrogenation for conversion of 2-(alkylthio)-1,4-dihydropyrimidines to 2-(alkylthio)pyrimidines. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.08.057] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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21
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Synthesis, Characterization and Catalytic Activity of Molybdenum Oxide Nanoparticles by Albumen, Assisting Microwave Process for Dehydrogenation of 1,4-Dihydropyridines. J CLUST SCI 2014. [DOI: 10.1007/s10876-014-0730-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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22
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Preparation of 6-Unsubstituted 3,4-Dihydropyrimidin-2(1H)-Ones and 2-(Arylamino)Pyrimidines. Chem Heterocycl Compd (N Y) 2014. [DOI: 10.1007/s10593-014-1428-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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23
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Rostamizadeh S, Nojavan M. An Environmentally Benign Multicomponent Synthesis of Some Novel 2-Methylthio Pyrimidine Derivatives Using MCM-41-NH2as Nanoreactor and Nanocatalyst. J Heterocycl Chem 2013. [DOI: 10.1002/jhet.1755] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Shahnaz Rostamizadeh
- Department of Chemistry, Faculty of Science; K. N. Toosi University of Technology; P.O. Box: 15875-4416 Tehran Iran
| | - Masoomeh Nojavan
- Department of Chemistry, Faculty of Science; K. N. Toosi University of Technology; P.O. Box: 15875-4416 Tehran Iran
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Han B, Yang XL, Fang R, Yu W, Wang C, Duan XY, Liu S. Oxime radical promoted dioxygenation, oxyamination, and diamination of alkenes: synthesis of isoxazolines and cyclic nitrones. Angew Chem Int Ed Engl 2012; 51:8816-20. [PMID: 22829389 DOI: 10.1002/anie.201203799] [Citation(s) in RCA: 166] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2012] [Indexed: 11/11/2022]
Affiliation(s)
- Bing Han
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P.R. China.
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Han B, Yang XL, Fang R, Yu W, Wang C, Duan XY, Liu S. Oxime Radical Promoted Dioxygenation, Oxyamination, and Diamination of Alkenes: Synthesis of Isoxazolines and Cyclic Nitrones. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201203799] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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27
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Wang R, Liu ZQ. Solvent-Free and Catalyst-Free Biginelli Reaction To Synthesize Ferrocenoyl Dihydropyrimidine and Kinetic Method To Express Radical-Scavenging Ability. J Org Chem 2012; 77:3952-8. [DOI: 10.1021/jo300282y] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rui Wang
- Department of Organic Chemistry, College of Chemistry, Jilin University, Changchun 130021, China
| | - Zai-Qun Liu
- Department of Organic Chemistry, College of Chemistry, Jilin University, Changchun 130021, China
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Han B, Yang XL, Wang C, Bai YW, Pan TC, Chen X, Yu W. CuCl/DABCO/4-HO-TEMPO-catalyzed aerobic oxidative synthesis of 2-substituted quinazolines and 4H-3,1-benzoxazines. J Org Chem 2011; 77:1136-42. [PMID: 22168403 DOI: 10.1021/jo2020399] [Citation(s) in RCA: 148] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The Cu/N-ligand/TEMPO catalytic system was first applied to the aerobic oxidative synthesis of heterocycles. As demonstrated, 2-substituted quinazolines and 4H-3,1-benzoxazines were synthesized efficiently from the one-pot reaction of aldehydes with 2-aminobenzylamines and 2-aminobenzyl alcohols, respectively, by employing CuCl/DABCO/4-HO-TEMPO as the catalysts and oxygen as the terminal oxidant.
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Affiliation(s)
- Bing Han
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui Street, Lanzhou 730000, P. R. China.
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