1
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Babcock EG, Rahman MS, Taylor JE. Brønsted acid-catalysed desilylative heterocyclisation to form substituted furans. Org Biomol Chem 2022; 21:163-168. [PMID: 36472096 DOI: 10.1039/d2ob01828d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Abstract
Heterocyclisation of tert-butyldimethylsilyl (TBS) protected γ-hydroxy-α,β-unsaturated ketones catalysed by para-toluenesulfonic acid (p-TSA) to form substituted furans is reported. The reaction proceeds under mild conditions at room temperature in methanol to give a range of furan products (21 examples, up to 98% yield). Mechanistic experiments suggest the reaction proceeds via in situ deprotection followed by catalytic dehydrative heterocyclisation.
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Affiliation(s)
- Emily G Babcock
- Department of Chemistry, University of Bath, Claverton Down, Bath, Somerset, BA2 7AY, UK.
| | - Md Shafiqur Rahman
- Department of Chemistry, University of Bath, Claverton Down, Bath, Somerset, BA2 7AY, UK.
| | - James E Taylor
- Department of Chemistry, University of Bath, Claverton Down, Bath, Somerset, BA2 7AY, UK.
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2
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Pu WY, Chen XY, Dong L. Rh(III)-catalyzed [5+1] spirocyclization to produce novel benzimidazole-incorporated spirosuccinimides. GREEN SYNTHESIS AND CATALYSIS 2022. [DOI: 10.1016/j.gresc.2022.09.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022] Open
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3
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Karami S, Bayat M, Nasri S, Mirzaei F. A three-component cyclocondensation reaction for the synthesis of new triazolo[1,5-a]pyrimidine scaffolds using 3-aminotriazole, aldehydes and ketene N,S-acetal. Mol Divers 2021; 25:2053-2062. [PMID: 32388702 DOI: 10.1007/s11030-020-10096-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Accepted: 04/23/2020] [Indexed: 01/16/2023]
Abstract
This study describes the use of 3-aminotriazole, different aldehydes and N-methyl-1-(methylthio)-2-nitroethenamine as a ketene N,S-acetal in a three-component condensation for the synthesis of a novel library of triazolo[1,5-a]pyrimidine scaffolds. The presence of trichloroacetic acid as a Brønsted-Lowry acidic promoter in acetonitrile or water solvent and room temperature condition resulting novel triazolo[1,5-a]pyrimidine systems named N-methyl-6-nitro-5-aryl-3,5-dihydro-[1, 2, 4]triazolo[1,5-a]pyrimidine-7-amine. The structure of products and direction of the N-cyclization could be confirmed using spectral data. The effect of various solvents on the progress of process was investigated in the paper. The presence of five nitrogen heteroatoms, the use of various aldehydes affording a range of skeletally distinct triazolo[1,5-a]pyrimidine-based heterocycles, the potency to create numerous hydrogen bonds in the product structure, and direction of cyclization are attractive features of this reaction.
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Affiliation(s)
- Solmaz Karami
- Department of Chemistry, Faculty of Science, Imam Khomeini International University, Qazvin, Iran
| | - Mohammad Bayat
- Department of Chemistry, Faculty of Science, Imam Khomeini International University, Qazvin, Iran.
| | - Shima Nasri
- Department of Chemistry, Faculty of Science, Imam Khomeini International University, Qazvin, Iran
| | - Faezeh Mirzaei
- Department of Chemistry, Faculty of Science, Imam Khomeini International University, Qazvin, Iran
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4
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Matcha SL, Karasala BK, Botsa SM, Vidavalur S. Brønsted acid catalyzed synthesis of 2‐aryl‐quinazolinones via cyclization of 2‐aminobenzamide with benzonitriles in
PEG. J Heterocycl Chem 2021. [DOI: 10.1002/jhet.4321] [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)
| | | | - Sathish Mohan Botsa
- National Centre for Polar and Ocean Research Ministry of Earth Sciences Goa India
| | - Siddaiah Vidavalur
- Department of Organic Chemistry & FDW Andhra University Visakhapatnam India
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5
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Chen S, Bai R, Li M, Liu P, Gu Y. Acid‐Acid‐Catalyzed Tandem Reactions Driven by an Additive‐Like Component. CHEM REC 2020. [DOI: 10.1002/tcr.202000097] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Shaomin Chen
- Key Laboratory for Large-Format Battery Materials and System Ministry of Education School of Chemistry and Chemical Engineering Huazhong University of Science and Technology Wuhan 430074 P.R. China
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan School of Chemistry and Chemical Engineering Shihezi University Shihezi 832004 P.R. China
| | - Rongxian Bai
- Key Laboratory for Large-Format Battery Materials and System Ministry of Education School of Chemistry and Chemical Engineering Huazhong University of Science and Technology Wuhan 430074 P.R. China
| | - Minghao Li
- Key Laboratory for Large-Format Battery Materials and System Ministry of Education School of Chemistry and Chemical Engineering Huazhong University of Science and Technology Wuhan 430074 P.R. China
| | - Ping Liu
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan School of Chemistry and Chemical Engineering Shihezi University Shihezi 832004 P.R. China
| | - Yanlong Gu
- Key Laboratory for Large-Format Battery Materials and System Ministry of Education School of Chemistry and Chemical Engineering Huazhong University of Science and Technology Wuhan 430074 P.R. China
- State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical Physics Lanzhou 730000 P.R. China
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6
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Potassium hydrogen sulfate mediated kinetics and mechanism of oxidation of certain polyols by Quinolinium bound Cr(VI) reagents. SN APPLIED SCIENCES 2020. [DOI: 10.1007/s42452-020-03537-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
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7
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Transformations of 1-phenethyl-1,2,3,6-tetrahydropyridines in the presence of trifluoromethanesulfonic acid. Chem Heterocycl Compd (N Y) 2020. [DOI: 10.1007/s10593-020-02748-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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8
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Sushmita, Aggarwal T, Saini KM, Verma AK. Olefin-Oriented Selective Synthesis of Linear and Branched N-Alkylated Heterocycles by Hydroamination. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000373] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Sushmita
- Department of Chemistry; University of Delhi; 110007 Delhi India
| | - Trapti Aggarwal
- Department of Chemistry; University of Delhi; 110007 Delhi India
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9
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Farooq S, Ngaini Z. One Pot and Two Pot Synthetic Strategies and Biological Applications of Epoxy-Chalcones. CHEMISTRY AFRICA 2020. [DOI: 10.1007/s42250-020-00128-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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10
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Liu X, Wang Y, Zhou J, Yu Y, Cao H. Triflic Acid-Catalyzed Cycloisomerization of 1,6-Enynes: Facile Access to Carbo- and Azaheterocycles. J Org Chem 2020; 85:2406-2414. [PMID: 31870155 DOI: 10.1021/acs.joc.9b03112] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A new and efficient strategy for enynes cyclization catalyzed by triflic acid has been described. Various valuable carbocycle-fused and heterocycle-fused ketones were easily accessed by the formation of new C-C and C-O bond under benign reaction conditions. This protocol also provides another opportunity to construct polycyclic single-nitrogen ketones via a cation-induced cascade cyclization of polyenynes. Furthermore, antiviral bioassays revealed that a few compounds exhibited good antiviral activity against tobacco mosaic virus at a concentration of 200 μg mL-1.
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Affiliation(s)
- Xiang Liu
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering & Technology Research Center , Guangdong Pharmaceutical University , Zhongshan 528458 , P. R. of China
| | - Yuhan Wang
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering & Technology Research Center , Guangdong Pharmaceutical University , Zhongshan 528458 , P. R. of China
| | - Jinlei Zhou
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering & Technology Research Center , Guangdong Pharmaceutical University , Zhongshan 528458 , P. R. of China
| | - Yue Yu
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering & Technology Research Center , Guangdong Pharmaceutical University , Zhongshan 528458 , P. R. of China
| | - Hua Cao
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering & Technology Research Center , Guangdong Pharmaceutical University , Zhongshan 528458 , P. R. of China
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11
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Stuke A, Kunkel C, Golze D, Todorović M, Margraf JT, Reuter K, Rinke P, Oberhofer H. Atomic structures and orbital energies of 61,489 crystal-forming organic molecules. Sci Data 2020; 7:58. [PMID: 32071311 PMCID: PMC7029047 DOI: 10.1038/s41597-020-0385-y] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Accepted: 01/21/2020] [Indexed: 12/14/2022] Open
Abstract
Data science and machine learning in materials science require large datasets of technologically relevant molecules or materials. Currently, publicly available molecular datasets with realistic molecular geometries and spectral properties are rare. We here supply a diverse benchmark spectroscopy dataset of 61,489 molecules extracted from organic crystals in the Cambridge Structural Database (CSD), denoted OE62. Molecular equilibrium geometries are reported at the Perdew-Burke-Ernzerhof (PBE) level of density functional theory (DFT) including van der Waals corrections for all 62 k molecules. For these geometries, OE62 supplies total energies and orbital eigenvalues at the PBE and the PBE hybrid (PBE0) functional level of DFT for all 62 k molecules in vacuum as well as at the PBE0 level for a subset of 30,876 molecules in (implicit) water. For 5,239 molecules in vacuum, the dataset provides quasiparticle energies computed with many-body perturbation theory in the G0W0 approximation with a PBE0 starting point (denoted GW5000 in analogy to the GW100 benchmark set (M. van Setten et al. J. Chem. Theory Comput. 12, 5076 (2016))).
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Affiliation(s)
- Annika Stuke
- Department of Applied Physics, Aalto University, P.O. Box 11100, Aalto, FI-00076, Finland.
| | - Christian Kunkel
- Chair for Theoretical Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstraße 4, D-85747, Garching, Germany
| | - Dorothea Golze
- Department of Applied Physics, Aalto University, P.O. Box 11100, Aalto, FI-00076, Finland
| | - Milica Todorović
- Department of Applied Physics, Aalto University, P.O. Box 11100, Aalto, FI-00076, Finland
| | - Johannes T Margraf
- Chair for Theoretical Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstraße 4, D-85747, Garching, Germany
| | - Karsten Reuter
- Chair for Theoretical Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstraße 4, D-85747, Garching, Germany
| | - Patrick Rinke
- Department of Applied Physics, Aalto University, P.O. Box 11100, Aalto, FI-00076, Finland
- Chair for Theoretical Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstraße 4, D-85747, Garching, Germany
| | - Harald Oberhofer
- Chair for Theoretical Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstraße 4, D-85747, Garching, Germany
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12
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Sharma S, Paul AK, Singh V. La(OTf)3-catalysed one-pot synthesis of pyrazole tethered imidazo[1,2-a]azine derivatives and evaluation of their light emitting properties. NEW J CHEM 2020. [DOI: 10.1039/c9nj05426j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
La(OTf)3catalysed one-pot facile protocol has been unfolded towards diversity-oriented synthesis of highly fluorescent pyrazole C-3(5) tethered imidazo[1,2-a]azines.
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Affiliation(s)
- Shubham Sharma
- Department of Chemistry
- Dr B R Ambedkar National Institute of Technology (NIT) Jalandhar
- India
| | - Avijit Kumar Paul
- Department of Chemistry
- National Institute of Technology (NIT) Kurukshetra
- India
| | - Virender Singh
- Department of Chemistry
- Dr B R Ambedkar National Institute of Technology (NIT) Jalandhar
- India
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13
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Abe M, Jean A, Blanchet J, Rouden J, Maddaluno J, De Paolis M. H-bonding vs Protonation of Alkynes in Regioselective Hydroamination Reactions: A Glimpse into the Reactivity of Arylogous Ynolethers and Ynamines. J Org Chem 2019; 84:15448-15475. [PMID: 31671943 DOI: 10.1021/acs.joc.9b02471] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In this paper is described the competition and transition between hydrogen bonding and protonation of alkynes connected, on one side, to various aromatic rings and to chiral amino ester appendages on the other side. While the first mode of activation induced the cyclization into pyrrolidines, the protonation of the alkyne led preferentially to tetrahydropyridines due to the higher level of the highest occupied molecular orbital (HOMO) of the considered arylogous ynolethers and ynamines. The transition between H-bonding and protonation was observed with the alkyne substituted with 2-methoxyphenyl, for which the cyclization delivered either five- or six-membered rings depending on the temperature of the experiment. From there, the cyclization of dialkoxy- and trialkoxyphenyl-substituted alkynes into six-membered rings, i.e., tetrahydropyridines, was developed. When next applied to alkynylindoles, the same pattern of cyclization provided six-membered rings as an illustration of the reactivity of arylogous ynamines. Thanks to the high reactivity of the intermediate cationic species, weak nucleophiles such as NH-oxazolidinone participated efficiently in the hydroamination reaction of alkynylindoles. Pyrrolidines, tetrahydropyridines, and piperidines decorated with various aromatics and substituents were thus prepared in enantio- and stereoselective manner. Capitalizing on the enamine moiety of the azaheterocycles, the molecular diversity was extended through stereoselective oxidation and ring contraction processes.
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Affiliation(s)
- Masahiro Abe
- Normandie Université, UNIROUEN, INSA de Rouen, CNRS, Laboratoire COBRA (UMR 6014 & FR 3038) , 76000 Rouen , France
| | - Alexandre Jean
- Normandie Université, UNIROUEN, INSA de Rouen, CNRS, Laboratoire COBRA (UMR 6014 & FR 3038) , 76000 Rouen , France.,Normandie Université, ENSICAEN, CNRS, Laboratoire LCMT (UMR 6507 & FR 3038) , 14000 Caen , France
| | - Jérôme Blanchet
- Normandie Université, ENSICAEN, CNRS, Laboratoire LCMT (UMR 6507 & FR 3038) , 14000 Caen , France
| | - Jacques Rouden
- Normandie Université, ENSICAEN, CNRS, Laboratoire LCMT (UMR 6507 & FR 3038) , 14000 Caen , France
| | - Jacques Maddaluno
- Normandie Université, UNIROUEN, INSA de Rouen, CNRS, Laboratoire COBRA (UMR 6014 & FR 3038) , 76000 Rouen , France
| | - Michaël De Paolis
- Normandie Université, UNIROUEN, INSA de Rouen, CNRS, Laboratoire COBRA (UMR 6014 & FR 3038) , 76000 Rouen , France
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14
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Vitkovskaya NM, Bobkov AS, Kuznetsova SV, Shcherbakova VS, Ivanov AV. Base‐Promoted Formation of an Annelated Pyrrolo‐1,4‐oxazine Ensemble from 1
H
‐pyrrol‐2‐ylmethanol and Propargyl Chloride: A Theoretical and Experimental Study. Chempluschem 2019. [DOI: 10.1002/cplu.201900407] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Nadezhda M. Vitkovskaya
- Laboratory of Quantum Chemistry Irkutsk State University 1 K. Marx St. 664003 Irkutsk Russian Federation
| | - Alexander S. Bobkov
- Laboratory of Quantum Chemistry Irkutsk State University 1 K. Marx St. 664003 Irkutsk Russian Federation
| | - Svetlana V. Kuznetsova
- A.E. Favorsky Irkutsk Institute of Chemistry Siberian Branch of the Russian Academy of Sciences 1 Favorsky St. 664033 Irkutsk Russian Federation
| | - Victoriya S. Shcherbakova
- A.E. Favorsky Irkutsk Institute of Chemistry Siberian Branch of the Russian Academy of Sciences 1 Favorsky St. 664033 Irkutsk Russian Federation
| | - Andrey V. Ivanov
- A.E. Favorsky Irkutsk Institute of Chemistry Siberian Branch of the Russian Academy of Sciences 1 Favorsky St. 664033 Irkutsk Russian Federation
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15
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Borane and beryllium derivatives of sulfuric and phosphoric acids: Strong inorganic acids. COMPUT THEOR CHEM 2019. [DOI: 10.1016/j.comptc.2019.112550] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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16
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Affiliation(s)
- Ani Deepthi
- Department of Chemistry, University of Kerala, Thiruvananthapuram 695581, India
| | - Beneesh P. Babu
- Department of Chemistry, National Institute of Technology Karnataka, Surathkal, India
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17
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Valadbeigi Y, Vianello R. A density functional theory study on the superacidity of sulfuric, fluorosulfuric, and triflic acid derivatives with two cyclopentadiene rings: ion pairs formation in the gas phase. J PHYS ORG CHEM 2019. [DOI: 10.1002/poc.3995] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Younes Valadbeigi
- Department of Chemistry, Faculty of ScienceImam Khomeini International University Qazvin Iran
| | - Robert Vianello
- Computational Organic Chemistry and Biochemistry Group, Division of Organic Chemistry and BiochemistryRuđer Bošković Institute Zagreb Croatia
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18
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Rezaei Z, Mahdi Didehvar M, Mahdavi M, Azizian H, Hamedifar H, Mohammed EHM, Ostad S, Amini M. Anticancer properties of N-alkyl-2, 4-diphenylimidazo [1, 2-a] quinoxalin-1-amine derivatives; kinase inhibitors. Bioorg Chem 2019; 90:103055. [PMID: 31220669 DOI: 10.1016/j.bioorg.2019.103055] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2018] [Revised: 03/27/2019] [Accepted: 06/06/2019] [Indexed: 12/24/2022]
Abstract
Structure activity correlation revealed that the quinoxaline ring is a satisfactory backbone for anticancer activity and a specific functional group at position 1 and 2 can improve the activity. In this basis, besides quinoxaline, imidazoles as potential anticancer agents were used as a supplementary agents for cancer treatment. In this paper, a new series of N-alkyl-2, 4-diphenylimidazo [1, 2-a] quinoxalin-1-amine derivatives were synthesized in a simple and efficient step. The products are fully characterized by 1H NMR, 13C NMR, FT-IR, HRMS, and CHN elemental analysis. Several starting materials with different functionalities have been used for the synthesis of the final products with high isolated yields. The biological activities of the synthesized compounds were evaluated in kinase inhibition and cytotoxic activity in several cancerous cell lines. All compounds (6) were evaluated for inhibition of the cell proliferation using 4 cancerous cell lines. Five of the more active compounds were studied for determination of IC50%. Compounds 6(32-34) showed good activity on some of cancerous cell lines. The results showed that compound 6-32 has the highest biological activity (IC50% 9.77 for K562 cell line). An IC50% value of 15.84 µM was observed for 6-34. Furthermore 6-34 exhibited inhibition of ABL1 and c-Src kinases with an IC50% value of 5.25 µM and 3.94 µM respectively. Docking simulation was performed to position active synthesized compounds 6-32, 6-33, and 6-34 over the ABL1 active site in two different wild-type (DFG-in and DFG-out motif conformer) and T315I mutant to determine the probable binding orientation, conformation and mode of interaction. According to docking study, the docked location in wild type forms is similar and can be found near the P-loop region while in the case of T315I mutant form, the compounds have a distinct docked location which is close to the αC helix and activation loop. Also, it concluded the role of R1 substituent on phenyl ring produced higher interaction energy. Additionally, the detailed inter-molecular energy and types of non-bonding interaction of these compounds over the wild-type and mutant form of ABL1.
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Affiliation(s)
- Zahra Rezaei
- Department of Medicinal Chemistry, Faculty of Pharmacy, Tehran University of Medical Sciences, 14176 Tehran, Iran
| | - Mir Mahdi Didehvar
- School of Chemistry, University College of Science, University of Tehran, PO Box 14155-6455, Tehran, Iran
| | - Mohammad Mahdavi
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Homa Azizian
- Department of Medicinal Chemistry, School of Pharmacy-International Campus, Iran University of Medical Sciences, Tehran, Iran
| | - Haleh Hamedifar
- CinnaGen Medical Biotechnology Research Center, Alborz University of Medical Sciences, Karaj, Iran
| | - Eman H M Mohammed
- Department of Chemistry, Faculty of Sciences, Menoufia University, Shebin EI-Koam, Egypt
| | - Sayednaser Ostad
- Department of Toxicology & Pharmacology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohsen Amini
- Department of Medicinal Chemistry, Faculty of Pharmacy and Drug Design and Development Research Center, The Institute of Pharmaceutical Sciences (TIPS), Tehran, Iran.
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19
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Kalvacherla B, Batthula S, Balasubramanian S, Palakodety RK. Transition-Metal-Free Cyclization of Propargylic Alcohols with Aryne: Synthesis of 3-Benzofuranyl-2-oxindole and 3-Spirooxindole Benzofuran Derivatives ⊥. Org Lett 2018; 20:3824-3828. [PMID: 29920110 DOI: 10.1021/acs.orglett.8b01414] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
An unprecedented base-mediated cyclization of propargylic alcohols with aryne is reported, providing a novel method for the synthesis of 3-benzofuranyl-2-oxindole and 3-spirooxindole benzofuran scaffolds via a propargyl Claisen rearrangement/cycloaddition pathway. The nature of the substituent on acetylene group of propargylic alcohol influences the outcome of the reaction. The protocol offers a transition-metal-free and operationally simple methodology with broad substrate scope as a ready access to complex oxindole-linked heterocyclic compounds.
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Affiliation(s)
- Babachary Kalvacherla
- D-211, Discovery Laboratory, Organic and Biomolecular Chemistry Division , CSIR-Indian Institute of Chemical Technology , Hyderabad - 500007 , India.,Academy of Scientific and Innovative Research (AcSIR) , New Delhi 110025 , India
| | - Srinivas Batthula
- D-211, Discovery Laboratory, Organic and Biomolecular Chemistry Division , CSIR-Indian Institute of Chemical Technology , Hyderabad - 500007 , India
| | - Sridhar Balasubramanian
- Center for X-ray Crystallography , CSIR-Indian Institute of Chemical Technology , Hyderabad - 500007 , India
| | - Radha Krishna Palakodety
- D-211, Discovery Laboratory, Organic and Biomolecular Chemistry Division , CSIR-Indian Institute of Chemical Technology , Hyderabad - 500007 , India
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20
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Albert-Soriano M, Trillo P, Soler T, Pastor IM. Versatile Barium and Calcium Imidazolium-Dicarboxylate Heterogeneous Catalysts in Quinoline Synthesis. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700990] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- María Albert-Soriano
- Organic Chemistry Dpt. and Instituto Síntesis Orgánica (ISO); University of Alicante; Apdo. 99 03080 Alicante Spain
| | - Paz Trillo
- Organic Chemistry Dpt. and Instituto Síntesis Orgánica (ISO); University of Alicante; Apdo. 99 03080 Alicante Spain
| | - Tatiana Soler
- Unit for X-ray spectroscopy of monocrystals and vibrational and optical spectroscopy; Research Technical Services; University of Alicante; Apdo. 99 03080 Alicante Spain
| | - Isidro M. Pastor
- Organic Chemistry Dpt. and Instituto Síntesis Orgánica (ISO); University of Alicante; Apdo. 99 03080 Alicante Spain
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21
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Garg V, Kumar P, Verma AK. Chemo-, Regio-, and Stereoselective N-Alkenylation of Pyrazoles/Benzpyrazoles Using Activated and Unactivated Alkynes. J Org Chem 2017; 82:10247-10262. [PMID: 28861995 DOI: 10.1021/acs.joc.7b01746] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Transition-metal-free chemo-, regio-, and stereoselective synthesis of (Z) and (E) styryl pyrazoles and benzpyrazoles by the addition of N-heterocycles onto functionalized terminal and internal alkynes using a super basic solution of KOH/DMSO has been described. The stereochemical outcome of the reaction was governed by time and quantity of the base. The reaction of pyrazoles and benzpyrazoles onto alkynes takes place chemoselectively without affecting the free -NH2 group of pyrazoles and -OH group of alkynes. The designed protocol was well implemented on alkynes bearing long alkyl chain, an alicyclic ring, hydroxy, ether, and ester functionality, which offer the N-alkenylated products in good yields. This developed methodology also provides easy access for the synthesis of bis-vinylated heterocycles. The presence of free -NH2, -OH, -COOR, and halo group in styryl pyrazoles, could be further utilized for synthetic elaboration, which is advantageous for biological evaluation. For the first time, we have disclosed the base-mediated conversion of (Z)-styryl pyrazoles to (E)-styryl pyrazoles in KOH/DMSO system. The cis-trans isomerization was supported by the control experiments and deuterium labeling studies.
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Affiliation(s)
- Vineeta Garg
- Synthetic Organic Chemistry Research Laboratory, Department of Chemistry, University of Delhi , Delhi 110007, India
| | - Pradeep Kumar
- Synthetic Organic Chemistry Research Laboratory, Department of Chemistry, University of Delhi , Delhi 110007, India
| | - Akhilesh K Verma
- Synthetic Organic Chemistry Research Laboratory, Department of Chemistry, University of Delhi , Delhi 110007, India
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22
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Neyyappadath RM, Cordes DB, Slawin AMZ, Smith AD. 6-exo-trig Michael addition-lactonizations for catalytic enantioselective chromenone synthesis. Chem Commun (Camb) 2017; 53:2555-2558. [PMID: 28133660 PMCID: PMC5358503 DOI: 10.1039/c6cc10178j] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Accepted: 01/18/2017] [Indexed: 11/30/2022]
Abstract
The catalytic enantioselective 6-exo-trig Michael addition-lactonization of enone-acid substrates to form cis-chromenones with high diastereo- and enantiocontrol was developed using the commercially available isothiourea tetramisole. An acidic workup proved necessary to minimize product epimerization and maximize product er, providing cis-chromenones in excellent yield, and with excellent diastereo- and enantioselectivity.
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Affiliation(s)
- Rifahath M Neyyappadath
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST, UK.
| | - David B Cordes
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST, UK.
| | - Alexandra M Z Slawin
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST, UK.
| | - Andrew D Smith
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST, UK.
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23
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Gandhamsetty N, Jee S, Chang S. Diastereoselective Construction of α-Silyltetrahydropyranols through Silyl-Oxa-Prins Cyclization. European J Org Chem 2017. [DOI: 10.1002/ejoc.201601631] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Narasimhulu Gandhamsetty
- Center for Catalytic Hydrocarbon Functionalizations; Institute of Basic Science (IBS); 305-701 Daejeon Korea
- Department of Chemistry; Korea Advanced Institute of Science and Technology (KAIST); 305-701 Daejeon Korea
| | - Soyeon Jee
- Center for Catalytic Hydrocarbon Functionalizations; Institute of Basic Science (IBS); 305-701 Daejeon Korea
- Department of Chemistry; Korea Advanced Institute of Science and Technology (KAIST); 305-701 Daejeon Korea
| | - Sukbok Chang
- Center for Catalytic Hydrocarbon Functionalizations; Institute of Basic Science (IBS); 305-701 Daejeon Korea
- Department of Chemistry; Korea Advanced Institute of Science and Technology (KAIST); 305-701 Daejeon Korea
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24
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Doan SH, Nguyen KD, Nguyen TT, Phan NTS. Direct arylation of benzoazoles with aldehydes utilizing metal–organic framework Fe3O(BDC)3 as a recyclable heterogeneous catalyst. RSC Adv 2017. [DOI: 10.1039/c6ra24716d] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Aryl-substituted azoles were effectively produced via the direct arylation of azoles with benzaldehydes under metal–organic framework catalysis.
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Affiliation(s)
- Son H. Doan
- Faculty of Chemical Engineering
- HCMC University of Technology
- VNU-HCM
- Ho Chi Minh City
- Viet Nam
| | - Khoa D. Nguyen
- Faculty of Chemical Engineering
- HCMC University of Technology
- VNU-HCM
- Ho Chi Minh City
- Viet Nam
| | - Tung T. Nguyen
- Faculty of Chemical Engineering
- HCMC University of Technology
- VNU-HCM
- Ho Chi Minh City
- Viet Nam
| | - Nam T. S. Phan
- Faculty of Chemical Engineering
- HCMC University of Technology
- VNU-HCM
- Ho Chi Minh City
- Viet Nam
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25
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Chen X, Day DP, Teo WT, Chan PWH. Gold- and Brønsted Acid-Catalyzed Cycloisomerization of 1,8-Diynyl Vinyl Acetates to Bicyclo[2.2.1]hept-2-en-7-ones. Org Lett 2016; 18:5936-5939. [DOI: 10.1021/acs.orglett.6b03049] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Xiaoyu Chen
- School
of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - David Philip Day
- Department
of Chemistry, University of Warwick, Coventry, CV4 7AL, United Kingdom
| | - Wan Teng Teo
- Division
of Chemistry and Biological Chemistry, School of Physical and Mathematical
Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Philip Wai Hong Chan
- School
of Chemistry, Monash University, Clayton, Victoria 3800, Australia
- Department
of Chemistry, University of Warwick, Coventry, CV4 7AL, United Kingdom
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26
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Affiliation(s)
- Chiara Cabrele
- Department
of Molecular Biology, University of Salzburg, Billrothstrasse 11, 5020 Salzburg, Austria
| | - Oliver Reiser
- Institut
für Organische Chemie, Universität Regensburg, Universitätsstrasse
31, 93053 Regensburg, Germany
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27
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In(OTf)3-HBF4Assisted Multicomponent Approach for One-Pot Synthesis of Pyrazolopyridinone Fused Imidazopyridines. ChemistrySelect 2016. [DOI: 10.1002/slct.201601133] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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28
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You L, Ren XF, Wang Y, Ma ZH, Gu Y, Ma JZ. “Release and Catch” Effect of Perfluoroalkylsulfonylimide-Functionalized Imidazole/Pyridine on Brønsted Acids in Organic Systems. ChemCatChem 2016. [DOI: 10.1002/cctc.201600859] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Li You
- Department of Chemistry; College of Sciences; Huazhong Agricultural University; No.1, Shizishan Street Hongshan District Wuhan 430070 P.R. China
| | - Xiao-Fei Ren
- Department of Chemistry; College of Sciences; Huazhong Agricultural University; No.1, Shizishan Street Hongshan District Wuhan 430070 P.R. China
| | - Yun Wang
- Department of Chemistry; College of Sciences; Huazhong Agricultural University; No.1, Shizishan Street Hongshan District Wuhan 430070 P.R. China
| | - Zhong-Hua Ma
- Department of Chemistry; College of Sciences; Huazhong Agricultural University; No.1, Shizishan Street Hongshan District Wuhan 430070 P.R. China
| | - Yanlong Gu
- Key Laboratory for Large-Format Battery Materials and System; Ministry of Education, School of Chemistry and Chemical Engineering; Huazhong University of Science and Technology; 1037 Luoyu road, Hongshan District Wuhan 430074 P.R. China
| | - Jing-Zhong Ma
- Department of Chemistry; College of Sciences; Huazhong Agricultural University; No.1, Shizishan Street Hongshan District Wuhan 430070 P.R. China
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