1
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Recent advances in transition metal-catalyzed reactions of chloroquinoxalines: Applications in bioorganic chemistry. Bioorg Chem 2022; 129:106195. [DOI: 10.1016/j.bioorg.2022.106195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Revised: 09/26/2022] [Accepted: 10/04/2022] [Indexed: 11/23/2022]
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2
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Xi Q, Jiang W, Wang H, Liu J, Sun F, Wen B, Zhao X, Gao S, Li Y. A Facile Synthesis and Antitumor Activity of Novel 2-Aryl-2,3- dihydro-1 H-pyrrolo[3,4- b]quinoxalin-1-ones. Polycycl Aromat Compd 2022. [DOI: 10.1080/10406638.2021.1881130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Qian Xi
- College of Chemistry and Chemical Engineering, Bohai University, Jinzhou, China
| | - Wenting Jiang
- College of Life Science, Yan’an University, Yan’an, China
| | - Hongxue Wang
- College of Chemistry and Chemical Engineering, Bohai University, Jinzhou, China
| | - Jia Liu
- Chaoyang Inspection and Testing Certification Center, Chaoyang, China
| | - Fuze Sun
- College of Chemistry and Chemical Engineering, Bohai University, Jinzhou, China
| | - Baohan Wen
- College of Chemistry and Chemical Engineering, Bohai University, Jinzhou, China
| | - Xinyue Zhao
- College of Chemistry and Chemical Engineering, Bohai University, Jinzhou, China
| | - Siyang Gao
- College of Chemistry and Chemical Engineering, Bohai University, Jinzhou, China
| | - Yang Li
- College of Chemistry and Chemical Engineering, Bohai University, Jinzhou, China
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3
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Dawood KM, Alaasar M. Transition Metals Catalyzed Heteroannulation Reactions in Aqueous Medium. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Kamal M. Dawood
- Cairo University Faculty of Science Chemistry Giza street 12613 Giza EGYPT
| | - Mohamed Alaasar
- Martin Luther University Halle-Wittenberg Faculty I of Natural Science - Biological Science: Martin-Luther-Universitat Halle-Wittenberg Naturwissenschaftliche Fakultat I Biowissenschaften Institute of Chemistry Halle GERMANY
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4
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Worch JC, Stubbs CJ, Price MJ, Dove AP. Click Nucleophilic Conjugate Additions to Activated Alkynes: Exploring Thiol-yne, Amino-yne, and Hydroxyl-yne Reactions from (Bio)Organic to Polymer Chemistry. Chem Rev 2021; 121:6744-6776. [PMID: 33764739 PMCID: PMC8227514 DOI: 10.1021/acs.chemrev.0c01076] [Citation(s) in RCA: 71] [Impact Index Per Article: 23.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Indexed: 12/22/2022]
Abstract
The 1,4-conjugate addition reaction between activated alkynes or acetylenic Michael acceptors and nucleophiles (i.e., the nucleophilic Michael reaction) is a historically useful organic transformation. Despite its general utility, the efficiency and outcomes can vary widely and are often closely dependent upon specific reaction conditions. Nevertheless, with improvements in reaction design, including catalyst development and an expansion of the substrate scope to feature more electrophilic alkynes, many examples now present with features that are congruent with Click chemistry. Although several nucleophilic species can participate in these conjugate additions, ubiquitous nucleophiles such as thiols, amines, and alcohols are commonly employed and, consequently, among the most well developed. For many years, these conjugate additions were largely relegated to organic chemistry, but in the last few decades their use has expanded into other spheres such as bioorganic chemistry and polymer chemistry. Within these fields, they have been particularly useful for bioconjugation reactions and step-growth polymerizations, respectively, due to their excellent efficiency, orthogonality, and ambient reactivity. The reaction is expected to feature in increasingly divergent application settings as it continues to emerge as a Click reaction.
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Affiliation(s)
- Joshua C. Worch
- School
of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K.
| | - Connor J. Stubbs
- School
of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K.
| | - Matthew J. Price
- School
of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K.
| | - Andrew P. Dove
- School
of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K.
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5
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Neri JM, Cavalcanti LN, Araújo RM, Menezes FG. 2,3-Dichloroquinoxaline as a versatile building block for heteroaromatic nucleophilic substitution: A review of the last decade. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2017.07.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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6
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Keivanloo A, Abbaspour S, Bakherad M, Notash B. New Pd-Mediated Cascade Reactions for Synthesis of Novel Functionalized 1,3-Oxazole-Linked Quinoxaline Amines. ChemistrySelect 2019. [DOI: 10.1002/slct.201803653] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Ali Keivanloo
- Faculty of Chemistry; Shahrood University of Technology; Shahrood 36199-95161 Iran
| | - Sima Abbaspour
- Faculty of Chemistry; Shahrood University of Technology; Shahrood 36199-95161 Iran
| | - Mohammad Bakherad
- Faculty of Chemistry; Shahrood University of Technology; Shahrood 36199-95161 Iran
| | - Behrouz Notash
- Department of Inorganic Chemistry and Catalysis; Shahid Beheshti University, General Campus, Evin; Tehran 1983963113 Iran
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7
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Kaushal T, Srivastava G, Sharma A, Singh Negi A. An insight into medicinal chemistry of anticancer quinoxalines. Bioorg Med Chem 2018; 27:16-35. [PMID: 30502116 DOI: 10.1016/j.bmc.2018.11.021] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Revised: 11/06/2018] [Accepted: 11/13/2018] [Indexed: 02/07/2023]
Abstract
Quinoxalines are benzopyrazines containing benzene and pyrazine rings fused together. In the recent past, quinoxalines have attracted Medicinal Chemists considerably for their syntheses and chemistry due to their distinct pharmacological activities. Diverse synthetic protocols have been developed via multicomponent reactions, single pot synthesis and combinatorial approach using efficient catalysts, reagents, and nano-composites etc. Further, the versatility of the quinoxaline core and its reasonable chemical simplicity devise it extremely promising source of bioactive compounds. Therefore, a wide variety of bioactive quinoxalines has been realised as antitumour, antifungal, anti-inflammatory, antimicrobial, and antiviral agents. Already, a few of them are clinical drugs while many more are under various phases of clinical trials. Present review focuses on chemistry and pharmacology (both efficacy and safety) of quinoxalines and also provides some insight in to their structure-activity relationship.
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Affiliation(s)
- Tanu Kaushal
- CSIR-Central Institute of Medicinal and Aromatic Plants (CSIR-CIMAP), P.O. CIMAP, Kukrail Picnic Spot Road, Lucknow 226 015, UP, India; Academy of Scientific and Innovative Research (AcSIR), New Delhi 110001, India
| | - Gaurava Srivastava
- CSIR-Central Institute of Medicinal and Aromatic Plants (CSIR-CIMAP), P.O. CIMAP, Kukrail Picnic Spot Road, Lucknow 226 015, UP, India; Academy of Scientific and Innovative Research (AcSIR), New Delhi 110001, India
| | - Ashok Sharma
- CSIR-Central Institute of Medicinal and Aromatic Plants (CSIR-CIMAP), P.O. CIMAP, Kukrail Picnic Spot Road, Lucknow 226 015, UP, India
| | - Arvind Singh Negi
- CSIR-Central Institute of Medicinal and Aromatic Plants (CSIR-CIMAP), P.O. CIMAP, Kukrail Picnic Spot Road, Lucknow 226 015, UP, India; Academy of Scientific and Innovative Research (AcSIR), New Delhi 110001, India.
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8
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Multicomponent synthesis of substituted 3-styryl-1H-quinoxalin-2-ones in an aqueous medium. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.09.048] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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9
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Novel one-pot synthesis of 1-alkyl-2-(aryloxy)methyl-1H-pyrrolo[2,3-b]quinoxalines via copper-free Sonogashira coupling reaction. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2018. [DOI: 10.1007/s13738-018-1492-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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10
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Kazemi SS, Keivanloo A, Nasr-Isfahani H, Amin AH. Synthesis and Antibacterial Evaluation of 1,2,3-Triazole-based Quinazolines Using Click Chemistry in the Presence of Salophen Schiff Base Ligand. J Heterocycl Chem 2018. [DOI: 10.1002/jhet.3200] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
| | - Ali Keivanloo
- Faculty of Chemistry; Shahrood University of Technology; Shahrood 36199-95161 Iran
| | | | - Amir Hossein Amin
- Faculty of Chemistry; Shahrood University of Technology; Shahrood 36199-95161 Iran
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11
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One-pot synthesis of biologically active 1,2,3-trisubstituted pyrrolo[2,3-b]quinoxalines through a palladium-catalyzed reaction with internal alkyne moieties. Mol Divers 2018; 22:879-891. [PMID: 29909566 DOI: 10.1007/s11030-018-9838-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Accepted: 05/29/2018] [Indexed: 10/14/2022]
Abstract
Synthesis of 2,3-disubstituted 1-alkylpyrrolo[2,3-b]quinoxalines was accomplished through the reaction of 3-chloroquinoxalin-2-amines with internal alkynes in the presence of Pd(OAc)[Formula: see text], NaOAc, and KOtBu in DMSO. This method afforded desired pyrrolo[2,3-b]quinoxalines in 65-92% reaction yields. The minimum inhibition concentration and minimum bactericidal concentration determinations against Micrococcus luteus and Pseudomonas aeruginosa revealed that some of the synthesized compounds showed the same values compared to tetracycline. These compounds could be used in the future research for the development of new antibiotics.
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12
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Fakharian M, Keivanloo A, Nabid MR. Rapid Synthesis of 2-Alkanol-substituted Pyrrolo[2,3- b
]quinoxalines from Propargylic Alcohols via
Copper-free Sonogashira Coupling Reaction at Room Temperature. J Heterocycl Chem 2018. [DOI: 10.1002/jhet.3165] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Mahsa Fakharian
- Faculty of Chemistry; Shahrood University of Technology; Shahrood 36199-95161 Iran
| | - Ali Keivanloo
- Faculty of Chemistry; Shahrood University of Technology; Shahrood 36199-95161 Iran
| | - Mohammad Reza Nabid
- Department of Chemistry and Petroleum Faculty of Sciences; Shahid Beheshti University; Tehran Iran
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13
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Besharati-Seidani T, Keivanloo A, Kaboudin B, Yoshida A, Yokomatsu T. Regioselective synthesis of 2,3-disubstituted 1-alkyl pyrrolo[2,3-b] quinoxalines through palladium-catalyzed Heck reaction of chalcones and evaluation of their anti-bacterial activities. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.03.055] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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14
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Fakharian M, Keivanloo A, Nabid MR. Using Calcium Carbide as an Acetylene Source for Cascade Synthesis of Pyrrolo[2,3-b
]quinoxalines via
Copper-Free Sonogashira
Coupling Reaction. Helv Chim Acta 2018. [DOI: 10.1002/hlca.201800004] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Mahsa Fakharian
- Faculty of Chemistry; Shahrood University of Technology; Shahrood 36199-95161 Iran
| | - Ali Keivanloo
- Faculty of Chemistry; Shahrood University of Technology; Shahrood 36199-95161 Iran
| | - Mohammad Reza Nabid
- Department of Chemistry and Petroleum Faculty of Sciences; Shahid Beheshti University; Evin Tehran 1983963113 Iran
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15
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Soozani A, Keivanloo A, Bakherad M. One-pot Synthesis of Quinoxaline Chalcones from Commercially Available Calcium Carbide Through Palladium-Catalyzed Coupling Reactions. ChemistrySelect 2017. [DOI: 10.1002/slct.201701803] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Atena Soozani
- Department of Chemistry; Shahrood University of Technology; Shahrood 36199-95161 Iran
| | - Ali Keivanloo
- Department of Chemistry; Shahrood University of Technology; Shahrood 36199-95161 Iran
| | - Mohammad Bakherad
- Department of Chemistry; Shahrood University of Technology; Shahrood 36199-95161 Iran
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16
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Development of an unexpected reaction pathway for the synthesis of 1,2,4-trisubstituted pyrrolo[1,2-a]quinoxalines through palladium-catalyzed cascade reactions. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.02.018] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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17
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Sunke R, Nallapati SB, Kumar JS, Shiva Kumar K, Pal M. Use of AlCl3 in Friedel Crafts arylation type reactions and beyond: an overview on the development of unique methodologies leading to N-heteroarenes. Org Biomol Chem 2017; 15:4042-4057. [DOI: 10.1039/c7ob00468k] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
An overview on the development of unique methodologies that highlight the use of AlCl3 in reactions leading to new N-heteroarenes of biological significance is presented.
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Affiliation(s)
- Rajnikanth Sunke
- Dr Reddy's Institute of Life Sciences
- Hyderabad Central University
- Hyderabad-500 046
- India
| | - Suresh Babu Nallapati
- Dr Reddy's Institute of Life Sciences
- Hyderabad Central University
- Hyderabad-500 046
- India
| | - Jetta Sandeep Kumar
- Dr Reddy's Institute of Life Sciences
- Hyderabad Central University
- Hyderabad-500 046
- India
| | - K. Shiva Kumar
- Department of Chemistry
- Osmania University
- Hyderabad-500 007
- India
| | - Manojit Pal
- Dr Reddy's Institute of Life Sciences
- Hyderabad Central University
- Hyderabad-500 046
- India
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18
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Keivanloo A, Kazemi SS, Nasr-Isfahani H, Bamoniri A. Novel multi-component synthesis of 1,4-disubstituted pyrrolo[1,2-a]quinoxalines through palladium-catalyzed coupling reaction/hetero-annulation in water. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.08.067] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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19
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Keivanloo A, Kazemi SS, Nasr-Isfahani H, Bamoniri A. Efficient one-pot synthesis of new 1-amino substituted pyrrolo[1,2-a]quinoline-4-carboxylate esters via copper-free Sonogashira coupling reactions. Mol Divers 2016; 21:29-36. [PMID: 27599493 DOI: 10.1007/s11030-016-9694-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2016] [Accepted: 08/16/2016] [Indexed: 12/24/2022]
Abstract
The reactions of several 2-chloroquinoline-3-carboxylate esters with propargyl alcohol and a secondary amine in the presence of palladium catalyst leads to the formation of new alkyl 1-amino substituted pyrrolo[1,2-a]quinoline-4-carboxylate derivatives. This one-pot process, carried out in the absence of any copper salt, provides an efficient method for the synthesis of functionalized pyrrolo[1,2-a]quinolines in good-to-high yields.
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Affiliation(s)
- Ali Keivanloo
- School of Chemistry, Shahrood University of Technology, Shahrood, Iran.
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20
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Besharati-Seidani T, Keivanloo A, Kaboudin B, Yokomatsu T. Efficient synthesis of 2-phenyl-3-substituted furo/thieno[2,3-b]quinoxalines via Sonogashira coupling reaction followed by iodocyclization and subsequent palladium-catalyzed cross-coupling reactions. RSC Adv 2016. [DOI: 10.1039/c6ra15425e] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
In this paper, we report the successful synthesis of new 2-phenyl-3-substituted furo/thieno[2,3-b]quinoxaline derivatives from 2-chloro-3-methoxyquinoxaline and 2-chloro-3-(methylthio)quinoxaline by a three-step approach.
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Affiliation(s)
| | - Ali Keivanloo
- School of Chemistry
- Shahrood University of Technology
- Shahrood 36199-95161
- Iran
| | - Babak Kaboudin
- Department of Chemistry
- Institute for Advanced Studies in Basic Sciences
- Zanjan 45137-66731
- Iran
| | - Tsutomu Yokomatsu
- School of Pharmacy
- Tokyo University of Pharmacy and Life Sciences
- Hachioji
- Japan
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21
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Domagala A, Jarosz T, Lapkowski M. Living on pyrrolic foundations – Advances in natural and artificial bioactive pyrrole derivatives. Eur J Med Chem 2015; 100:176-87. [DOI: 10.1016/j.ejmech.2015.06.009] [Citation(s) in RCA: 84] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Revised: 06/02/2015] [Accepted: 06/03/2015] [Indexed: 11/29/2022]
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22
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Keivanloo A, Bakherad M, Rajaei M. One-Pot Regioselective Synthesis of 5-Amino-3-Benzyl-7 H-[1,3]Thiazolo[3,2- A]Pyrimidin-7-Ones via Sonogashira Coupling Reaction. PHOSPHORUS SULFUR 2014. [DOI: 10.1080/10426507.2014.885972] [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]
Affiliation(s)
- Ali Keivanloo
- School of Chemistry, Shahrood University of Technology, Shahrood, Iran
| | - Mohammad Bakherad
- School of Chemistry, Shahrood University of Technology, Shahrood, Iran
| | - Mahboobe Rajaei
- School of Chemistry, Shahrood University of Technology, Shahrood, Iran
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23
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Babu PV, Mukherjee S, Deora GS, Chennubhotla KS, Medisetti R, Yellanki S, Kulkarni P, Sripelly S, Parsa KVL, Chatti K, Mukkanti K, Pal M. Ligand/PTC-free intramolecular Heck reaction: synthesis of pyrroloquinoxalines and their evaluation against PDE4/luciferase/oral cancer cell growth in vitro and zebrafish in vivo. Org Biomol Chem 2013; 11:6680-5. [PMID: 23986357 DOI: 10.1039/c3ob41504j] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of 1,3-disubstituted pyrrolo[2,3-b]quinoxalines has been designed for the potential inhibition of PDE4 without inhibiting luciferase. A ligand/PTC (phase transfer catalyst) free intramolecular Heck cyclization strategy was used to prepare these compounds, some of which showed significant inhibition of PDE4B (IC50≈ 5-14 μM) and growth inhibition of oral cancer cells (CAL 27) but not inhibition of luciferase in vitro. They also showed acceptable safety profiles but no apoptosis in zebrafish embryos.
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Affiliation(s)
- P Vijaya Babu
- Dr Reddy's Institute of Life Sciences, University of Hyderabad Campus, Gachibowli, Hyderabad 500046, India.
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24
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Keivanloo A, Bakherad M, Rahmani M, Rahimi A. Novel one-pot access to 2-formyl/acetyl-1-substituted pyrrolo[2,3-b]quinoxalines under Sonogashira reaction conditions. MONATSHEFTE FUR CHEMIE 2013. [DOI: 10.1007/s00706-012-0887-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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25
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Bakherad M, Jajarmi S. Pd/C-catalyzed, copper-free Sonogashira coupling: one-pot synthesis of 1-aryl-4-(2-phenylethynyl)[1,2,4]triazolo[4,3- a]quinoxalines in water. MONATSHEFTE FUR CHEMIE 2013; 144:885-890. [PMID: 26166882 PMCID: PMC4495046 DOI: 10.1007/s00706-012-0904-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/01/2012] [Accepted: 12/14/2012] [Indexed: 11/28/2022]
Abstract
Abstract Copper-free, Pd/C-catalyzed, one-pot reaction of 2,3-dichloroquinoxaline with hydrazine hydrate, bromine, phenylacetylene, and a variety of aldehydes provides an efficient and direct method for the preparation of 1-aryl-4-(2-phenylethynyl)[1,2,4]triazolo[4,3-a]quinoxalines in water at 70 °C. This methodology involves the use of inexpensive reagents or catalysts, and thus permits a new and practical access to triazolo[4,3-a]quinoxalines. Graphical abstract ![]()
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Affiliation(s)
- Mohammad Bakherad
- School of Chemistry, Shahrood University of Technology, Shahrood, Iran
| | - Saeideh Jajarmi
- School of Chemistry, Shahrood University of Technology, Shahrood, Iran
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26
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Prasad B, Shiva Kumar K, Vijaya Babu P, Anusha K, Rambabu D, Kandale A, Vanaja G, Kalle AM, Pal M. AlCl3 induced C–N bond formation followed by Pd/C–Cu mediated coupling–cyclization strategy: synthesis of pyrrolo[2,3-b]quinoxalines as anticancer agents. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.08.119] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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27
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Keivanloo A, Bakherad M, Nasr-Isfahani H, Esmaily S. Highly efficient synthesis of 5,6-disubstituted-5H-pyrrolo[2,3-b]pyrazine-2,3-dicarbonitriles through a one-pot palladium-catalyzed coupling reaction/cyclization in water. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.04.016] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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28
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Synthesis of pyrrolo[2,3-b]quinoxalines by the Pd/C-catalyzed multicomponent reaction of 1,2-dichloroquinoxaline with hydrazine hydrate, phenylacetylene, and a variety of aldehydes in water. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.01.045] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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