1
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Li Z, He Z, Huang Q, Kan M, Li H. Tuning Regioselectivity in the [3 + 2] Cycloaddition of Alkynyl Sulfonium Salts with Binucleophilic N-Aryl Amidines. Org Lett 2024. [PMID: 38788170 DOI: 10.1021/acs.orglett.4c01534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2024]
Abstract
A tunable reaction manifold of alkynyl sulfonium salts with binucleophilic N-aryl amidines in the absence of any transition metal catalyst is first reported. This methodology involves sequential addition/cyclization that is perfectly tuned by stepwise addition of K2CO3, affording a plethora of valuable 1,2,4- and 1,2,5-trisubstituted imidazoles in good yields with high regioselectivity. Importantly, trapping and isolation of the reactive intermediate unveiled the reaction mechanism of β-attack on the triple bond in this [3 + 2] cycloaddition reaction.
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Affiliation(s)
- Zhi Li
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
| | - Zhengjun He
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
| | - Qiang Huang
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
| | - Mei Kan
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
| | - Hongji Li
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
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2
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Aich S, Nandi R, Chatterjee N, Gayen KS, Pal S, Maiti DK. Catalytic I 2-moist DMSO-mediated synthesis of valuable α-amidohydroxyketones and unsymmetrical gem-bisamides from benzimidates. Org Biomol Chem 2023; 21:2524-2530. [PMID: 36876635 DOI: 10.1039/d3ob00165b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
We developed an efficient and straightforward I2-catalyzed strategy for the synthesis of functionalized α-amidohydroxyketones and symmetrical and unsymmetrical bisamides using incipient benzimidate scaffolds as starting materials and moist-DMSO as a reagent and solvent. The developed method proceeds through chemoselective intermolecular N-C-bond formation of benzimidates and the α-C(sp3)-H bond of acetophenone moieties. The key advantages of these design approaches include broad substrate scope and moderate yields. High-resolution mass spectrometry of the reaction progress and labeling experiments provided suitable evidence regarding the possible mechanism. 1H nuclear magnetic resonance titration revealed notable interaction between the synthesized α-amidohydroxyketones and some anions as well as biologically important molecules, which revealed a promising recognition property of these valuable motifs.
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Affiliation(s)
- Shobhon Aich
- Department of Chemistry, University of Calcutta, 92 A. P. C. Road, Kolkata-700009, India.
| | - Rajesh Nandi
- Department of Chemistry, University of Calcutta, 92 A. P. C. Road, Kolkata-700009, India.
| | - Nirbhik Chatterjee
- Department of Chemistry, Kanchrapara College, North 24 parganas-743145, India
| | | | - Subhasis Pal
- Department of Chemistry, University of Calcutta, 92 A. P. C. Road, Kolkata-700009, India.
| | - Dilip K Maiti
- Department of Chemistry, University of Calcutta, 92 A. P. C. Road, Kolkata-700009, India.
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3
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Němec V, Khirsariya P, Janovská P, Moyano PM, Maier L, Procházková P, Kebková P, Gybel' T, Berger BT, Chaikuad A, Reinecke M, Kuster B, Knapp S, Bryja V, Paruch K. Discovery of Potent and Exquisitely Selective Inhibitors of Kinase CK1 with Tunable Isoform Selectivity. Angew Chem Int Ed Engl 2023; 62:e202217532. [PMID: 36625768 DOI: 10.1002/anie.202217532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 01/09/2023] [Accepted: 01/10/2023] [Indexed: 01/11/2023]
Abstract
Casein kinases 1 (CK1) are key signaling molecules that have emerged recently as attractive therapeutic targets in particular for the treatment of hematological malignancies. Herein, we report the identification of a new class of potent and highly selective inhibitors of CK1α, δ and ϵ. Based on their optimal in vitro and in vivo profiles and their exclusive selectivity, MU1250, MU1500 and MU1742 were selected as quality chemical probes for those CK1 isoforms. At proper concentrations, MU1250 and MU1500 allow for specific targeting of CK1δ or dual inhibition of CK1δ/ϵ in cells. The compound MU1742 also efficiently inhibits CK1α and, to our knowledge, represents the first potent and highly selective inhibitor of this enzyme. In addition, we demonstrate that the central 1H-pyrrolo[2,3-b]pyridine-imidazole pharmacophore can be used as the basis of highly selective inhibitors of other therapeutically relevant protein kinases, e.g. p38α, as exemplified by the compound MU1299.
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Affiliation(s)
- Václav Němec
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic.,International Clinical Research Centre, St. Anne's University Hospital, Pekařská 53, Brno, 656 91, Czech Republic
| | - Prashant Khirsariya
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic.,International Clinical Research Centre, St. Anne's University Hospital, Pekařská 53, Brno, 656 91, Czech Republic
| | - Pavlína Janovská
- Department of Experimental Biology, Faculty of Science, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic
| | - Paula Martín Moyano
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic
| | - Lukáš Maier
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic.,International Clinical Research Centre, St. Anne's University Hospital, Pekařská 53, Brno, 656 91, Czech Republic
| | - Petra Procházková
- Department of Experimental Biology, Faculty of Science, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic
| | - Pavlína Kebková
- Department of Experimental Biology, Faculty of Science, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic
| | - Tomáš Gybel'
- Department of Experimental Biology, Faculty of Science, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic
| | - Benedict-Tilman Berger
- Institute for Pharmaceutical Chemistry, Structural Genomics Consortium, Johann Wolfgang Goethe-University, Max-von-Laue-Strasse 15, 60438, Frankfurt am Main, Germany
| | - Apirat Chaikuad
- Institute for Pharmaceutical Chemistry, Structural Genomics Consortium, Johann Wolfgang Goethe-University, Max-von-Laue-Strasse 15, 60438, Frankfurt am Main, Germany
| | - Maria Reinecke
- Chair of Proteomics and Bioanalytics, TUM School of Life Sciences, Technical University of Munich, 85354, Freising, Germany
| | - Bernhard Kuster
- Chair of Proteomics and Bioanalytics, TUM School of Life Sciences, Technical University of Munich, 85354, Freising, Germany.,Bavarian Center for Biomolecular Mass Spectrometry (BayBioMS), Technical University of Munich, 85354, Freising, Germany
| | - Stefan Knapp
- Institute for Pharmaceutical Chemistry, Structural Genomics Consortium, Johann Wolfgang Goethe-University, Max-von-Laue-Strasse 15, 60438, Frankfurt am Main, Germany
| | - Vítězslav Bryja
- Department of Experimental Biology, Faculty of Science, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic
| | - Kamil Paruch
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic.,International Clinical Research Centre, St. Anne's University Hospital, Pekařská 53, Brno, 656 91, Czech Republic
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4
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Saha N, Wanjari PJ, Dubey G, Mahawar N, Bharatam PV. Metal-free synthesis of imidazoles and 2-aminoimidazoles. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2022.134092] [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]
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5
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Takeda A, Okai H, Watabe K, Iida H. Metal-Free Atom-Economical Synthesis of Tetra-Substituted Imidazoles via Flavin-Iodine Catalyzed Aerobic Cross-Dehydrogenative Coupling of Amidines and Chalcones. J Org Chem 2022; 87:10372-10376. [PMID: 35839306 DOI: 10.1021/acs.joc.2c00596] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Herein, we demonstrated the oxidative cross-dehydrogenative coupling between amidines and chalcones catalyzed by flavin and iodine. The riboflavin-iodine catalytic system played multiple roles in substrate- and O2-activation, enabling the facile and atom-economical synthesis of tetra-substituted imidazoles in good yields (60-87%). This metal-free reaction consumed only 1 equiv of molecular oxygen and generated 2 equiv of environmentally benign H2O as the only byproduct.
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Affiliation(s)
- Aki Takeda
- Department of Chemistry, Graduate School of Natural Science and Technology, Shimane University, 1060 Nishikawatsu, Matsue, Shimane 690-8504, Japan
| | - Hayaki Okai
- Department of Chemistry, Graduate School of Natural Science and Technology, Shimane University, 1060 Nishikawatsu, Matsue, Shimane 690-8504, Japan
| | - Kyoji Watabe
- Department of Chemistry, Graduate School of Natural Science and Technology, Shimane University, 1060 Nishikawatsu, Matsue, Shimane 690-8504, Japan
| | - Hiroki Iida
- Department of Chemistry, Graduate School of Natural Science and Technology, Shimane University, 1060 Nishikawatsu, Matsue, Shimane 690-8504, Japan
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6
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Yadav R, Darakshan, Parvin T. Catalyst‐free one‐pot synthesis of quinoline tethered
α
‐amino ketones by multicomponent reactions. J Heterocycl Chem 2022. [DOI: 10.1002/jhet.4530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Rahul Yadav
- Department of Chemistry National Institute of Technology Patna, Ashok Rajpath Patna
| | - Darakshan
- Department of Chemistry National Institute of Technology Patna, Ashok Rajpath Patna
| | - Tasneem Parvin
- Department of Chemistry National Institute of Technology Patna, Ashok Rajpath Patna
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7
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Kook GY, Kim D, Chae MK, Ko HM. Rhodium(II)-Catalyzed Highly Selective 1,3-Insertion Reactions Using N-Sulfonyl-1,2,3-Triazoles with Heteroaryl Ethers or Heteroaryl Alcohols. J Org Chem 2022; 87:7253-7263. [PMID: 35604873 DOI: 10.1021/acs.joc.2c00467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The transformation of N-sulfonyl-1,2,3-triazoles via insertion/rearrangement is achieved using 2-hydroxybenzimidazole or 2-alkoxybenzothiazole over 3 mol % Rh2(Oct)4 for the synthesis of α-((1H-benzo[d]imidazol-2-yl)amino) ketones or (Z)-2-alkoxy-2-phenylethenamines. This regio- and stereoselective reaction proceeds under mild conditions, is tolerant of functional groups, and has a broad substrate scope. Notably, while the general rhodium-catalyzed reaction involves sigmatropic rearrangement from an allyl vinyl ether, the present synthetic methodology prevents rearrangement owing to the benzimidazole group, allowing access to (Z)-olefins.
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Affiliation(s)
- Ga Young Kook
- Department of Chemistry, Wonkwang University, 460 Iksandae-ro, Iksan, Jeonbuk 54538, Republic of Korea
| | - Daegeun Kim
- Department of Chemistry, Wonkwang University, 460 Iksandae-ro, Iksan, Jeonbuk 54538, Republic of Korea
| | - Min Ki Chae
- Department of Chemistry, Wonkwang University, 460 Iksandae-ro, Iksan, Jeonbuk 54538, Republic of Korea
| | - Haye Min Ko
- Department of Chemistry, Wonkwang University, 460 Iksandae-ro, Iksan, Jeonbuk 54538, Republic of Korea.,Wonkwang Institute of Materials Science and Technology, Wonkwang University, 460 Iksandae-ro, Iksan, Jeonbuk 54538, Republic of Korea
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8
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Li H, Xue W, Wang J, Ma J, Zhao B, Guo X. A Sensitive Fluorescent Sensor for Highly Sensitive Detection of Water in Organic Solvents Based on Substituted Imidazole. J Fluoresc 2021; 31:907-913. [PMID: 33826071 DOI: 10.1007/s10895-021-02729-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Accepted: 03/23/2021] [Indexed: 11/26/2022]
Abstract
A novel substituted imidazole derivative 1a with carboxyl and quinoline structure has been designed and synthesized. And our initial discovery is that this compound can effectively detect water in ethanol. And the metal in solution couldn't affect the absorption and fluorescence Spectra of 1a. With the addition of water, the energy band appears a red-shift from 330nm to 355nm in the absorption spectra. And the emission spectrum undergoes an important change in its fluorescent effect in the presence of water. Furthermore, absorption peak of 1a displays a red-shift with increasing pH from 2.31 to 10.72. All available data (absorption and emission) strongly support the possible mechanism. Due to the pronounced fluorescence changing property, the substituted imidazole derivative 1a could be utilized as fluorescent probes for detecting water in ethanol.
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Affiliation(s)
- Huiqian Li
- College of Chemistry and Chemical Engineering, Qiqihar University, 161006, Qiqihar, People's Republic of China
| | - Weijian Xue
- College of Chemistry and Chemical Engineering, Qiqihar University, 161006, Qiqihar, People's Republic of China.
| | - Jinping Wang
- College of Chemistry and Chemical Engineering, Qiqihar University, 161006, Qiqihar, People's Republic of China
| | - Jie Ma
- College of Chemistry and Chemical Engineering, Qiqihar University, 161006, Qiqihar, People's Republic of China
| | - Bing Zhao
- College of Chemistry and Chemical Engineering, Qiqihar University, 161006, Qiqihar, People's Republic of China
| | - Xiangfeng Guo
- College of Chemistry and Chemical Engineering, Qiqihar University, 161006, Qiqihar, People's Republic of China
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9
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Xu GQ, Xiao TF, Feng GX, Liu C, Zhang B, Xu PF. Metal-Free α-C(sp3)–H Aroylation of Amines via a Photoredox Catalytic Radical–Radical Cross-Coupling Process. Org Lett 2021; 23:2846-2852. [DOI: 10.1021/acs.orglett.1c00226] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Guo-Qiang Xu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Teng-Fei Xiao
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Guo-Xuan Feng
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Chen Liu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Baoxin Zhang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Peng-Fei Xu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
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10
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Allen LAT, Raclea RC, Natho P, Parsons PJ. Recent advances in the synthesis of α-amino ketones. Org Biomol Chem 2021; 19:498-513. [PMID: 33325975 DOI: 10.1039/d0ob02098b] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Due to the importance of the amino ketone motif in synthetic and medicinal chemistry, the number of protocols developed in recent years has considerably increased. This review serves to collate and critically evaluate novel methodologies published since 2011 towards this high value synthon. The chapters are divided by the requisite functionality in the starting material, and an emphasis is placed on discussing functional group compatibility and resultant product substitution patterns. Throughout, applications to medicinal targets are highlighted and mechanistic details are presented, and we further provide a short outlook for future development and emerging potential within this area.
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Affiliation(s)
- Lewis A T Allen
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, W12 0BZ, London, UK.
| | - Robert-Cristian Raclea
- Massachusetts Institute of Technology, Department of Chemistry, 77, Massachusetts Avenue, Cambridge, MA 02139-4307, USA
| | - Philipp Natho
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, W12 0BZ, London, UK.
| | - Philip J Parsons
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, W12 0BZ, London, UK.
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11
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Tetrabutylammonium Bromide (TBAB) Catalyzed Synthesis of Bioactive Heterocycles. Molecules 2020; 25:molecules25245918. [PMID: 33327504 PMCID: PMC7764977 DOI: 10.3390/molecules25245918] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 09/21/2020] [Accepted: 09/23/2020] [Indexed: 02/04/2023] Open
Abstract
During the last two decades, tetrabutylammonium bromide (TBAB) has gained significant attention as an efficient metal-free homogeneous phase-transfer catalyst. A catalytic amount of TBAB is sufficient to catalyze various alkylation, oxidation, reduction, and esterification processes. It is also employed as an efficient co-catalyst for numerous coupling reactions. It has also acted as an efficient zwitterionic solvent in many organic transformations under molten conditions. In this review, we have summarized the recent developments on TBAB-catalyzed protocols for the efficient synthesis of various biologically promising heterocyclic scaffolds.
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12
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Komogortsev AN, Melekhina VG, Lichitsky BV. The synthesis of novel type of α-aminoketones containing allomaltol fragment. SYNTHETIC COMMUN 2020. [DOI: 10.1080/00397911.2020.1849725] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Andrey N. Komogortsev
- Russian Academy of Science, N.D. Zelinsky Institute of Organic Chemistry, Moscow, Russia
| | - Valeriya G. Melekhina
- Russian Academy of Science, N.D. Zelinsky Institute of Organic Chemistry, Moscow, Russia
| | - Boris V. Lichitsky
- Russian Academy of Science, N.D. Zelinsky Institute of Organic Chemistry, Moscow, Russia
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13
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Gao C, Zhou Q, Yang L, Zhang X, Fan X. Synthesis of α-Amidoketones through the Cascade Reaction of Carboxylic Acids with Vinyl Azides under Catalyst-Free Conditions. J Org Chem 2020; 85:13710-13720. [PMID: 33112628 DOI: 10.1021/acs.joc.0c01871] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
An efficient synthesis of α-amidoketone derivatives through the cascade reactions of carboxylic acids with vinyl azides is presented. Compared with literature protocols, notable features of this new method include catalyst-free conditions, broad substrate scope, good tolerance of a wide range of functional groups, and high efficiency. In addition, the synthetic potential of this method as a tool for late-stage modification was convincingly manifested by its application in the structural elaborations of a number of carboxylic acid drug molecules.
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Affiliation(s)
- Cai Gao
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Qianting Zhou
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Li Yang
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Xinying Zhang
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Xuesen Fan
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
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14
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Pal R, O'Brien SC, Willis MC. α-Amidoaldehydes as Substrates in Rhodium-Catalyzed Intermolecular Alkyne Hydroacylation: The Synthesis of α-Amidoketones. Chemistry 2020; 26:11710-11714. [PMID: 32449532 PMCID: PMC7540332 DOI: 10.1002/chem.202002478] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Indexed: 11/25/2022]
Abstract
We show that readily available α‐amidoaldehydes are effective substrates for intermolecular Rh‐catalyzed alkyne hydroacylation reactions. The catalyst [Rh(dppe)(C6H5F)][BArF4] provides good reactivity, and allows a broad range of aldehydes and alkynes to be used as substrates, delivering α‐amidoketone products. High yields and high levels of regioselectivity are achieved. The use of α‐amidoaldehydes as substrates establishes that 1,4‐dicarbonyl motifs can be used as controlling groups in Rh‐catalyzed hydroacylation reactions.
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Affiliation(s)
- Ritashree Pal
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford, OX1 3TA, United Kingdom
| | - Sean C O'Brien
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford, OX1 3TA, United Kingdom
| | - Michael C Willis
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford, OX1 3TA, United Kingdom
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15
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Das TK, Biju AT. Imines as acceptors and donors in N-heterocyclic carbene (NHC) organocatalysis. Chem Commun (Camb) 2020; 56:8537-8552. [PMID: 32602493 DOI: 10.1039/d0cc03290e] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The synthetic potential of imines as electrophiles or as a source of nucleophilic coupling partner in N-heterocyclic carbene (NHC) catalysis for the synthesis of various nitrogen heterocycles and functionalized amines is highlighted in this Feature Article. Electrophilic imines are suitable candidates for intercepting the NHC-derived acyl anions, homoenolate equivalents, and (di)enolates for the synthesis of α-amino ketones and a variety of lactam derivatives. Moreover, enamines generated from imines bearing α-hydrogen could be trapped with α,β-unsaturated acylazoliums for the synthesis of functionalized dihydropyridinones. NHCs are also useful for the umpolung of imines for the generation of aza-Breslow intermediates thus leading to the synthesis of indoles, quinolines, dihydroquinoxalines etc. A concise account of the diverse reactivity of imines in NHC catalysis has been presented.
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Affiliation(s)
- Tamal Kanti Das
- Organic Chemistry Division, CSIR-National Chemical Laboratory (CSIR-NCL), Dr Homi Bhabha Road, Pune-411008, India and Academy of Scientific and Innovative Research (AcSIR), New Delhi 110020, India
| | - Akkattu T Biju
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India.
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16
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Limouzadeh A, Naeimi H. Nife 2o 4@Sio 2pra/PC-Ni(II) as a highly efficient catalyst for microwave promoted one pot synthesis of tetra substituted imidazoles. J COORD CHEM 2020. [DOI: 10.1080/00958972.2020.1802019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Atefeh Limouzadeh
- Faculty of Chemistry, Department of Organic Chemistry, University of Kashan, Kashan, Iran
| | - Hossein Naeimi
- Faculty of Chemistry, Department of Organic Chemistry, University of Kashan, Kashan, Iran
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17
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Gallati CM, Goetzfried SK, Ausserer M, Sagasser J, Plangger M, Wurst K, Hermann M, Baecker D, Kircher B, Gust R. Synthesis, characterization and biological activity of bromido[3-ethyl-4-aryl-5-(2-methoxypyridin-5-yl)-1-propyl-1,3-dihydro-2H-imidazol-2-ylidene]gold(i) complexes. Dalton Trans 2020; 49:5471-5481. [PMID: 32255443 DOI: 10.1039/c9dt04824c] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Bromido[3-ethyl-4-aryl-5-(2-methoxypyridin-5-yl)-1-propyl-1,3-dihydro-2H-imidazol-2-ylidene]gold(i) complexes (8a-h) with methoxy, methyl and fluorine substituents at different positions of the 4-aryl ring were synthesized and characterized. The relevance of the 2-methoxypyridin-5-yl residue and the substituents at the 4-aryl ring with regard to the activity against a series of cell lines was determined. Particularly against the Cisplatin-resistant ovarian cancer cell line A2780cis, the most active bromido[3-ethyl-4-(4-methoxyphenyl)-5-(2-methoxypyridin-5-yl)-1-propyl-1,3-dihydro-2H-imidazol-2-ylidene]gold(i) complex 8c was more active than Auranofin. It also inhibited thioredoxin reductase more effectively and induced high amounts of reactive oxygen species in A2780cis cells. Furthermore, its influence on non-cancerous SV 80 lung fibroblasts was lower than that of Auranofin. This fact, together with a high accumulation rate in tumor cells, determined on the example of MCF-7 cells, makes this complex an interesting candidate for further extensive studies.
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Affiliation(s)
- Caroline M Gallati
- Department of Pharmaceutical Chemistry, Institute of Pharmacy, Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innrain 80/82, A-6020 Innsbruck, Austria.
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18
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Affiliation(s)
- Mosstafa Kazemi
- Young Researchers and Elite Club, Ilam Branch, Islamic Azad University, Ilam, Iran
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19
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Samanta S, Santra S, Chatterjee R, Majee A. A new tandem synthesis of bis(β,β'-dialkoxy carbonyl) compounds by oxidative cleavage of aziridines under metal-free conditions. Org Biomol Chem 2020; 18:551-556. [PMID: 31894233 DOI: 10.1039/c9ob02451d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
An efficient and new approach has been developed to synthesize bis(β,β'-dialkoxy carbonyl) derivatives through the reaction between N-tosylaziridines and malonate esters under ambient air using tBuOK in DMSO solvent. A plausible reaction pathway has been predicted. Control experiments suggested that the reactions proceed through the formation of α-aminoketones. This reaction offers a broad substrate scope, metal-free synthesis, excellent regioselectivity, easily accessible reactants, and simple operation. A gram-scale synthesis demonstrates the potential applications of the present method.
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Affiliation(s)
- Satyajit Samanta
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India.
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20
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Sabbasani VR, Wang K, Streeter MD, Spiegel DA. One‐Step Synthesis of 2,5‐Diaminoimidazoles and Total Synthesis of Methylglyoxal‐Derived Imidazolium Crosslink (MODIC). Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201911156] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Venkata R. Sabbasani
- Department of Chemistry Yale University 225 Prospect Street New Haven CT 06511 USA
| | - Kung‐Pern Wang
- Department of Chemistry Yale University 225 Prospect Street New Haven CT 06511 USA
| | - Matthew D. Streeter
- Department of Chemistry Yale University 225 Prospect Street New Haven CT 06511 USA
| | - David A. Spiegel
- Department of Chemistry Yale University 225 Prospect Street New Haven CT 06511 USA
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21
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Sabbasani VR, Wang K, Streeter MD, Spiegel DA. One-Step Synthesis of 2,5-Diaminoimidazoles and Total Synthesis of Methylglyoxal-Derived Imidazolium Crosslink (MODIC). Angew Chem Int Ed Engl 2019; 58:18913-18917. [PMID: 31713976 PMCID: PMC6973230 DOI: 10.1002/anie.201911156] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Indexed: 01/28/2023]
Abstract
Here we describe a general method for the synthesis of 2,5-diaminoimidazoles, which involves a thermal reaction between α-aminoketones and substituted guanylhydrazines without the need for additives. As one of the few known ways to access the 2,5-diaminoimidazole motif, our method greatly expands the number of reported diaminoimidazoles and further supports our previous observations that these compounds spontaneously adopt the non-aromatic 4(H) tautomer. The reaction works successfully on both cyclic and acyclic amino ketone starting materials, as well as a range of substituted guanylhydrazines. Following optimization, the method was applied to the efficient synthesis of the advanced glycation end product (AGE) methylglyoxal-derived imidazolium crosslink (MODIC). We expect that this method will enable rapid access to a variety of biologically important 2,5-diaminoimidazole-containing products.
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Affiliation(s)
| | - Kung‐Pern Wang
- Department of ChemistryYale University225 Prospect StreetNew HavenCT06511USA
| | - Matthew D. Streeter
- Department of ChemistryYale University225 Prospect StreetNew HavenCT06511USA
| | - David A. Spiegel
- Department of ChemistryYale University225 Prospect StreetNew HavenCT06511USA
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22
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Kaur N, Bhardwaj P, Devi M, Verma Y, Ahlawat N, Grewal P. Ionic Liquids for the Synthesis of Five-Membered N,N-, N,N,N- and N,N,N,NHeterocycles. CURR ORG CHEM 2019. [DOI: 10.2174/1385272823666190717101741] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Due to special properties of ILs (Ionic Liquids) like their wide liquid range, good solvating ability, negligible vapour pressure, non-inflammability, environment friendly medium, high thermal stability, easy recycling and rate promoters etc. they are used in organic synthesis. The investigation for the replacement of organic solvents in organic synthesis is a growing area of interest due to increasing environmental issues. Therefore, ionic liquids have attracted the attention of chemists and act as a catalyst and reaction medium in organic reaction with high activity. There is no doubt that ionic liquids have become a major subject of study for modern chemistry. In comparison to traditional processes the use of ionic liquids resulted in improved, complimentary or alternative selectivities in organic synthesis. The present manuscript reported the synthesis of multiple nitrogen containing five-membered heterocyclic compounds using ionic liquids. This review covered interesting discoveries in the past few years.
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Affiliation(s)
- Navjeet Kaur
- Department of Chemistry, Banasthali Vidyapith, Banasthali-304022 (Rajasthan), India
| | - Pranshu Bhardwaj
- Department of Chemistry, Banasthali Vidyapith, Banasthali-304022 (Rajasthan), India
| | - Meenu Devi
- Department of Chemistry, Banasthali Vidyapith, Banasthali-304022 (Rajasthan), India
| | - Yamini Verma
- Department of Chemistry, Banasthali Vidyapith, Banasthali-304022 (Rajasthan), India
| | - Neha Ahlawat
- Department of Chemistry, Banasthali Vidyapith, Banasthali-304022 (Rajasthan), India
| | - Pooja Grewal
- Department of Chemistry, Banasthali Vidyapith, Banasthali-304022 (Rajasthan), India
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23
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Construction of substituted imidazoles from aryl methyl ketones and benzylamines via N-heterocyclic carbene-catalysis. CATAL COMMUN 2019. [DOI: 10.1016/j.catcom.2019.03.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
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24
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Rossi R, Angelici G, Casotti G, Manzini C, Lessi M. Catalytic Synthesis of 1,2,4,5‐Tetrasubstituted 1
H
‐Imidazole Derivatives: State of the Art. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201801381] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Renzo Rossi
- Dipartimento di Chimica e Chimica IndustrialeUniversity of Pisa via G. Moruzzi 13 56124 Pisa Italy
| | - Gaetano Angelici
- Dipartimento di Chimica e Chimica IndustrialeUniversity of Pisa via G. Moruzzi 13 56124 Pisa Italy
| | - Gianluca Casotti
- Dipartimento di Chimica e Chimica IndustrialeUniversity of Pisa via G. Moruzzi 13 56124 Pisa Italy
| | - Chiara Manzini
- Dipartimento di Chimica e Chimica IndustrialeUniversity of Pisa via G. Moruzzi 13 56124 Pisa Italy
| | - Marco Lessi
- Dipartimento di Chimica e Chimica IndustrialeUniversity of Pisa via G. Moruzzi 13 56124 Pisa Italy
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25
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Harisha MB, Dhanalakshmi P, Suresh R, Kumar RR, Muthusubramanian S, Bhuvanesh N. TMSOTf-Catalysed Synthesis of 2,4,5-Trisubstituted Imidazoles from Vinyl Azides and Nitriles. ChemistrySelect 2019. [DOI: 10.1002/slct.201801543] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Mysore Bhyrappa Harisha
- Department of Organic Chemistry; School of Chemistry; Madurai Kamaraj university, Madurai -; 625 021 Tamil Nadu India
- Advinus Therapeutics Limited; A TATA Enterprise; Bangalore - 560 058 India
| | - Pandi Dhanalakshmi
- Department of Organic Chemistry; School of Chemistry; Madurai Kamaraj university, Madurai -; 625 021 Tamil Nadu India
| | - Rajendran Suresh
- Department of Organic Chemistry; School of Chemistry; Madurai Kamaraj university, Madurai -; 625 021 Tamil Nadu India
| | - Raju Ranjith Kumar
- Department of Organic Chemistry; School of Chemistry; Madurai Kamaraj university, Madurai -; 625 021 Tamil Nadu India
| | - Shanmugam Muthusubramanian
- Department of Organic Chemistry; School of Chemistry; Madurai Kamaraj university, Madurai -; 625 021 Tamil Nadu India
| | - Nattamai Bhuvanesh
- X-ray Diffraction Laboratory; Department of Chemistry; Texas A & M University; College Station TX77842 USA
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26
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Mahato S, Santra S, Zyryanov GV, Majee A. Metal-Free Amidation Reactions of Terminal Alkynes with Benzenesulfonamide. J Org Chem 2019; 84:3176-3183. [DOI: 10.1021/acs.joc.8b03065] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Sachinta Mahato
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
| | - Sougata Santra
- Department of Organic and Biomolecular Chemistry, Chemical Engineering Institute, Ural Federal University, 19 Mira Street, 620002 Yekaterinburg, Russian Federation
| | - Grigory V. Zyryanov
- Department of Organic and Biomolecular Chemistry, Chemical Engineering Institute, Ural Federal University, 19 Mira Street, 620002 Yekaterinburg, Russian Federation
- I. Ya. Postovskiy Institute of Organic Synthesis, Ural Division of the Russian Academy of Sciences, 22 South Kovalevskoy Street, 620219 Yekaterinburg, Russian Federation
| | - Adinath Majee
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
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27
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Xu F, Si XJ, Song YY, Wang XD, Liu CS, Geng PF, Du M. Palladium-Catalyzed C–N Bond Cleavage of 2H-Azirines for the Synthesis of Functionalized α-Amido Ketones. J Org Chem 2019; 84:2200-2208. [DOI: 10.1021/acs.joc.8b03193] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Fen Xu
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China
| | - Xiao-Ju Si
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China
| | - Yuan-Yuan Song
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China
| | - Xing-Dong Wang
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China
| | - Chun-Sen Liu
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China
| | - Peng-Fei Geng
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China
| | - Miao Du
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China
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28
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Raina G, Kannaboina P, Mupparapu N, Raina S, Ahmed QN, Das P. Programmed synthesis of triarylnitroimidazoles via sequential cross-coupling reactions. Org Biomol Chem 2019; 17:2134-2147. [DOI: 10.1039/c9ob00144a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Transition-metal-catalyzed programmed sequential arylation of 2-chloro-4-nitro-1H-imidazoles was achieved.
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Affiliation(s)
- Gaurav Raina
- Medicinal Chemistry Division
- CSIR-Indian Institute of Integrative Medicine (IIIM)
- Jammu-180001
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Prakash Kannaboina
- Medicinal Chemistry Division
- CSIR-Indian Institute of Integrative Medicine (IIIM)
- Jammu-180001
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Nagaraju Mupparapu
- Medicinal Chemistry Division
- CSIR-Indian Institute of Integrative Medicine (IIIM)
- Jammu-180001
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Sushil Raina
- Medicinal Chemistry Division
- CSIR-Indian Institute of Integrative Medicine (IIIM)
- Jammu-180001
- India
| | - Qazi Naveed Ahmed
- Medicinal Chemistry Division
- CSIR-Indian Institute of Integrative Medicine (IIIM)
- Jammu-180001
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Parthasarathi Das
- Department of Applied Chemistry
- Indian Institute of Technology (ISM)
- Dhanbad-826004
- India
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29
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Qu J, Bhadbhade M, Kumar N, Black DS. Unusual formation of novel highly substituted N-(3-indolyl)-imidazoles. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.11.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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30
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Muneeswara M, Muthukumar A, Sekar G. Dual Role of N-Bromosuccinimide as Oxidant and Succinimide Surrogate in Domino One-Pot Oxidative Amination of Benzyl Alcohols for the Synthesis of α-Imido Ketones. ChemistrySelect 2018. [DOI: 10.1002/slct.201803465] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Madithedu Muneeswara
- Department of Chemistry; Indian Institution of Technology Madras Chennai-600036, Tamilnadu; India
| | - Alagesan Muthukumar
- Department of Chemistry; Indian Institution of Technology Madras Chennai-600036, Tamilnadu; India
| | - Govindasamy Sekar
- Department of Chemistry; Indian Institution of Technology Madras Chennai-600036, Tamilnadu; India
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31
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Chen X, Wang Z, Huang H, Deng GJ. Elemental Sulfur-Promoted Aerobic Cyclization of Ketones and Aliphatic Amines for Synthesis of Tetrasubstituted Imidazoles. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800765] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Xiangui Chen
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry; Xiangtan University; Xiangtan 411105 China
| | - Zhen Wang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry; Xiangtan University; Xiangtan 411105 China
| | - Huawen Huang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry; Xiangtan University; Xiangtan 411105 China
| | - Guo-Jun Deng
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry; Xiangtan University; Xiangtan 411105 China
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33
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Peng Q, Guo D, Bie J, Wang J. Catalytic Enantioselective Aza-Benzoin Reactions of Aldehydes with 2H-Azirines. Angew Chem Int Ed Engl 2018; 57:3767-3771. [PMID: 29436753 DOI: 10.1002/anie.201712785] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Revised: 01/18/2018] [Indexed: 11/10/2022]
Abstract
The unprecedented enantioselective aza-benzoin reaction of aldehydes with 2H-azirines was developed by utilizing a chiral N-heterocyclic carbene as the catalyst. A wide range of corresponding aziridines can be obtained in good yields with high enantioselectivities. The obtained optically active aziridines should be useful in the synthesis of other valuable molecules.
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Affiliation(s)
- Qiupeng Peng
- School of Pharmaceutical Sciences, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education), Tsinghua University, Beijing, 100084, China
| | - Donghui Guo
- School of Pharmaceutical Sciences, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education), Tsinghua University, Beijing, 100084, China
| | - Jianbo Bie
- School of Pharmaceutical Sciences, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education), Tsinghua University, Beijing, 100084, China
| | - Jian Wang
- School of Pharmaceutical Sciences, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education), Tsinghua University, Beijing, 100084, China
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34
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Peng Q, Guo D, Bie J, Wang J. Catalytic Enantioselective Aza-Benzoin Reactions of Aldehydes with 2H
-Azirines. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201712785] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Qiupeng Peng
- School of Pharmaceutical Sciences; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases; Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education); Tsinghua University; Beijing 100084 China
| | - Donghui Guo
- School of Pharmaceutical Sciences; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases; Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education); Tsinghua University; Beijing 100084 China
| | - Jianbo Bie
- School of Pharmaceutical Sciences; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases; Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education); Tsinghua University; Beijing 100084 China
| | - Jian Wang
- School of Pharmaceutical Sciences; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases; Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education); Tsinghua University; Beijing 100084 China
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35
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Design and synthesis of coumarin–imidazole hybrid and phenyl-imidazoloacrylates as potent antimicrobial and antiinflammatory agents. MONATSHEFTE FUR CHEMIE 2018. [DOI: 10.1007/s00706-017-2079-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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36
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Li YJ, Zhang L, Yan N, Meng XH, Zhao YL. Acid/Base-Co-catalyzed Direct Oxidative α-Amination of Cyclic Ketones: Using Molecular Oxygen as the Oxidant. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201701103] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yi-Jin Li
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis; Faculty of Chemistry; Northeast Normal University; Changchun 130024 People's Republic of China
| | - Lu Zhang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis; Faculty of Chemistry; Northeast Normal University; Changchun 130024 People's Republic of China
| | - Na Yan
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis; Faculty of Chemistry; Northeast Normal University; Changchun 130024 People's Republic of China
| | - Xiang-He Meng
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis; Faculty of Chemistry; Northeast Normal University; Changchun 130024 People's Republic of China
| | - Yu-Long Zhao
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis; Faculty of Chemistry; Northeast Normal University; Changchun 130024 People's Republic of China
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37
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Maddili SK, Chowrasia R, Kannekanti VK, Gandham H. 1,3-Di-n-butylimidazolium tribromide [BBim]Br 3: An efficient recyclable catalyst mediated synthesis of N-substituted azepines and their biological evaluation-interaction study with human serum albumin. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2017; 178:101-107. [PMID: 29128705 DOI: 10.1016/j.jphotobiol.2017.10.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2017] [Revised: 10/11/2017] [Accepted: 10/26/2017] [Indexed: 10/18/2022]
Abstract
A majority of previously reported methods suffer from insufficient yields as well as more complicated experimental procedures, a smaller amount of isolated yields involving time-consuming and tiresome work-up with the use of metal catalyst and restricted scope of substrates. To overcome these issues, an environmentally benign, ionic liquid endorsed multi-component protocol to N-substituted azepines has been exploited by means of coupling aromatic amines, dimethyl/diethyl acetylene dicarboxylate, 2,5-dimethoxytetrahydrofuran using 1,3-Di-n-butylimidazolium tribromide [BBim]Br3. The catalyst can be recycled and reused for subsequent reactions. The reactivated ionic liquid could be further reused twice as an accelerator All the synthesized compounds were further screened for their antimicrobial properties against three gram positive, four gram negative, and five fungal strains with chloromycin, norflaxacin, and fluconazole as reference drugs. Most of the tested compounds presented significant potency, especially, compound 4e displayed significant antibacterial activity (MIC=1-16μg/mL) whereas compound 4k showed momentous antifungal efficacy (MIC=2-32μg/mL). In addition binding behavior of compound 4e was investigated by binding study between calf thymus DNA and compound 4e by UV-Visible absorption spectroscopy and further research about HSA interactions were carried out. The observed wavelength showed a constancy thus revealing the occurrence of non-covalent π-π stacking interactions of compound 4e and HSA.
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Affiliation(s)
- Swetha K Maddili
- Department of Engineering Chemistry, AUCE (A), Andhra University, Vishakapatnam 530 003, India
| | - Rakhi Chowrasia
- Department of Chemistry, Osmania University, Hyderabad, Telangana State 500004, India
| | - Vijaya Kumar Kannekanti
- Department of Engineering Chemistry, AUCE (A), Andhra University, Vishakapatnam 530 003, India; Institute of Bioorganic & Medicinal Chemistry, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.
| | - Himabindu Gandham
- Department of Engineering Chemistry, AUCE (A), Andhra University, Vishakapatnam 530 003, India.
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38
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Nikoofar K, Dizgarani SM. HNO 3 @nano SiO 2 : An efficient catalytic system for the synthesis of multi-substituted imidazoles under solvent-free conditions. JOURNAL OF SAUDI CHEMICAL SOCIETY 2017. [DOI: 10.1016/j.jscs.2015.11.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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39
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Di Mauro G, Maryasin B, Kaiser D, Shaaban S, González L, Maulide N. Mechanistic Pathways in Amide Activation: Flexible Synthesis of Oxazoles and Imidazoles. Org Lett 2017; 19:3815-3818. [PMID: 28703599 PMCID: PMC5525102 DOI: 10.1021/acs.orglett.7b01678] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The preparation of substituted aminooxazoles and aminoimidazoles from α-arylamides and α-aminoamides through triflic anhydride-mediated amide activation is reported. These reactions proceed via the intermediacy of nitrilium adducts and feature N-oxide-promoted umpolung of the α-position of amides as well as a mechanistically intriguing sequence that results in sulfonyl migration from nitrogen to carbon. Quantum-chemical mechanistic analysis sheds light on the intricacies of the process.
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Affiliation(s)
- Giovanni Di Mauro
- Institute of Organic Chemistry, Faculty of Chemistry, University of Vienna , Währinger Straße 38, 1090 Vienna, Austria
| | - Boris Maryasin
- Institute of Organic Chemistry, Faculty of Chemistry, University of Vienna , Währinger Straße 38, 1090 Vienna, Austria.,Institute of Theoretical Chemistry, Faculty of Chemistry, University of Vienna , Währinger Straße 17, 1090 Vienna, Austria
| | - Daniel Kaiser
- Institute of Organic Chemistry, Faculty of Chemistry, University of Vienna , Währinger Straße 38, 1090 Vienna, Austria
| | - Saad Shaaban
- Institute of Organic Chemistry, Faculty of Chemistry, University of Vienna , Währinger Straße 38, 1090 Vienna, Austria
| | - Leticia González
- Institute of Theoretical Chemistry, Faculty of Chemistry, University of Vienna , Währinger Straße 17, 1090 Vienna, Austria
| | - Nuno Maulide
- Institute of Organic Chemistry, Faculty of Chemistry, University of Vienna , Währinger Straße 38, 1090 Vienna, Austria
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40
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Asymmetric cross-benzoin condensation promoted by a chiral triazolium precatalyst bearing a pyridine moiety. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.05.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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41
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Zhou RR, Cai Q, Li DK, Zhuang SY, Wu YD, Wu AX. Acid-Promoted Multicomponent Tandem Cyclization to Synthesize Fully Substituted Oxazoles via Robinson–Gabriel-Type Reaction. J Org Chem 2017; 82:6450-6456. [DOI: 10.1021/acs.joc.7b00763] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Rong-Rong Zhou
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Qun Cai
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Deng-Kui Li
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Shi-Yi Zhuang
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Yan-Dong Wu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - An-Xin Wu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
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42
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Ren Q, Li M, Yuan L, Wang J. Recent advances in N-heterocyclic carbene catalyzed achiral synthesis. Org Biomol Chem 2017; 15:4731-4749. [PMID: 28540374 DOI: 10.1039/c7ob00568g] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
N-Heterocyclic carbenes (NHCs) have emerged as powerful and elegant organocatalysts in a variety of newly developed and unprecedented enantioselective transformations due to their unique umpolung capacity. As a supplement to conventional enantioselective organocatalysis, NHC-induced non-asymmetric catalysis has gradually attracted much interest in recent years. Herein, this review aims to reveal the recent developments in NHC-promoted non-asymmetric umpolung transformations resulting in the expeditious construction of versatile achiral natural heterocycles, carbocycles and acylated products.
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Affiliation(s)
- Qiao Ren
- College of Pharmaceutical Science, Southwest University, Chongqing 400715, China.
| | - Muyao Li
- College of Pharmaceutical Science, Southwest University, Chongqing 400715, China.
| | - Lujiang Yuan
- College of Pharmaceutical Science, Southwest University, Chongqing 400715, China.
| | - Jian Wang
- School of Chemical & Environmental Engineering, Wuyi University, Jiangmen 529020, China. and Department of Pharmacology and Pharmaceutical Sciences, School of Medicine, Tsinghua University, Beijing 100084, China
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43
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Yu H, Xiao L, Yang X, Shao L. Controllable access to multi-substituted imidazoles via palladium(ii)-catalyzed C–C coupling and C–N condensation cascade reactions. Chem Commun (Camb) 2017; 53:9745-9748. [DOI: 10.1039/c7cc05315k] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel and efficient protocol for the controllable synthesis of various di-, tri- and tetra-substituted imidazoles via cascade palladium catalyzed C–C coupling followed by intramolecular C–N bond formation was developed.
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Affiliation(s)
- Haihua Yu
- School of Pharmacy
- Fudan University
- Shanghai 201203
- P. R. China
| | - Li Xiao
- School of Pharmacy
- Fudan University
- Shanghai 201203
- P. R. China
| | - Xicheng Yang
- School of Pharmacy
- Fudan University
- Shanghai 201203
- P. R. China
| | - Liming Shao
- School of Pharmacy
- Fudan University
- Shanghai 201203
- P. R. China
- State Key Laboratory of Medical Neurobiology
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44
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Das UK, Shimon LJW, Milstein D. Imidazole synthesis by transition metal free, base-mediated deaminative coupling of benzylamines and nitriles. Chem Commun (Camb) 2017; 53:13133-13136. [DOI: 10.1039/c7cc08322j] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
An unprecedented transition metal free, base-mediated deaminative coupling of benzylamines and nitriles is reported. This protocol provides a practical strategy for the synthesis of 2,4,5-tri-substituted imidazoles with liberation of NH3.
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Affiliation(s)
- Uttam Kumar Das
- Department of Organic Chemistry, Weizmann Institute of Science
- Rehovot 76100
- Israel
| | - Linda J. W. Shimon
- Department of Chemical Research Support, Weizmann Institute of Science
- Rehovot 76100
- Israel
| | - David Milstein
- Department of Organic Chemistry, Weizmann Institute of Science
- Rehovot 76100
- Israel
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45
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Keiko NA, Vchislo NV. Synthesis of Diheteroatomic Five-Membered Heterocyclic Compounds from α,β-Unsaturated Aldehydes. ASIAN J ORG CHEM 2016. [DOI: 10.1002/ajoc.201600227] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- N. A. Keiko
- A. E. Favorsky Irkutsk Institute of Chemistry; Siberian Branch of the Russian Academy of Sciences; 1 Favorsky Street 664033 Irkutsk Russian Federation
| | - N. V. Vchislo
- A. E. Favorsky Irkutsk Institute of Chemistry; Siberian Branch of the Russian Academy of Sciences; 1 Favorsky Street 664033 Irkutsk Russian Federation
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46
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Yugandar S, Konda S, Parameshwarappa G, Ila H. One-Pot Synthesis of 2,4,5-Trisubstituted Imidazoles via [2 + 2 + 1] Cycloannulation of 1,3-Bishet(aryl)-monothio-1,3-diketones, α-Substituted Methylamines and Sodium Nitrite through α-Nitrosation of Enaminones. J Org Chem 2016; 81:5606-22. [PMID: 27194455 DOI: 10.1021/acs.joc.6b00938] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient one-pot synthesis of a series of diversely functionalized trisubstituted 4(5)het(aroyl)-2,5(4)-het(aryl)/alkylimidazoles from readily available 1,3-bishet(aryl)monothio-1,3-diketones has been reported. This novel sequential one-pot, three step protocol, wherein three new carbon nitrogen bonds are formed in contiguous fashion, involves in situ generation of enaminones by reaction of monothio-1,3-diketones with α-substituted methylamines, followed by their α-nitrosation with sodium nitrite and subsequent base mediated intramolecular heterocyclization of the resulting α-hydroxyiminoimines to trisubstituted imidazoles in high yields under mild conditions. These newly prepared 4(5)-het(aroyl)-5(4)-het(aryl)/alkylimidazoles are shown to exist as tautomeric mixture, however, their subsequent alkylation with methyl iodide in the presence of potassium carbonate affords 1-N-methy-2,5-bishet(aryl)-4-het(aroyl)imidazoles in highly regioselective fashion in most of the cases. Synthesis of few 4(5)-(2-hydroxyphenyl)-2,5(4)-substituted imidazoles, which are known to be good coordinating ligands, has also been reported. A probable mechanism for the formation of these imidazoles from hydroxyiminoimine intermediates has also been suggested.
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Affiliation(s)
- S Yugandar
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research , Jakkur, Bangalore-560064, India
| | - S Konda
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research , Jakkur, Bangalore-560064, India
| | - G Parameshwarappa
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research , Jakkur, Bangalore-560064, India
| | - H Ila
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research , Jakkur, Bangalore-560064, India
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47
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Shinde MH, Kshirsagar UA. N-Bromosuccinimide promoted and base switchable one pot synthesis of α-imido and α-amino ketones from styrenes. Org Biomol Chem 2016; 14:858-61. [DOI: 10.1039/c5ob02034d] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
An N-Bromosuccinimide (NBS) promoted one pot strategy for the synthesis of α-amino functionalized aryl ketones starting from commercially available styrenes has been developed.
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Affiliation(s)
- Mahesh H. Shinde
- Department of Chemistry
- Savitribai Phule Pune University (Formerly: University of Pune)
- Pune-411007
- India
| | - Umesh A. Kshirsagar
- Department of Chemistry
- Savitribai Phule Pune University (Formerly: University of Pune)
- Pune-411007
- India
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48
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Kim Y, Pak HK, Rhee YH, Park J. Catalytic transformation of esters of 1,2-azido alcohols into α-amido ketones. Chem Commun (Camb) 2016; 52:6549-52. [DOI: 10.1039/c6cc02063a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The esters of 1,2-azido alcohols were transformed into α-amido ketones without external oxidants through the Ru-catalyzed formation of N–H imines with the liberation of N2 followed by intramolecular migration of the acyl moiety.
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Affiliation(s)
- Yongjin Kim
- Department of Chemistry
- POSTECH (Pohang University of Science and Technology)
- Pohang 790-784
- Korea
| | - Han Kyu Pak
- Department of Chemistry
- POSTECH (Pohang University of Science and Technology)
- Pohang 790-784
- Korea
| | - Young Ho Rhee
- Department of Chemistry
- POSTECH (Pohang University of Science and Technology)
- Pohang 790-784
- Korea
| | - Jaiwook Park
- Department of Chemistry
- POSTECH (Pohang University of Science and Technology)
- Pohang 790-784
- Korea
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49
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Li M, Zhang L, Zhao B, Liang F. One-pot, two-step conversion of alkynes to α-amino (α,α-diamino) ketones with a DMF-activated N-bromoimide strategy. RSC Adv 2016. [DOI: 10.1039/c6ra12770c] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A simple, one-pot, two-step cascade reaction for the synthesis of α-amino ketones has been developed.
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Affiliation(s)
- Mengru Li
- Department of Chemistry
- Northeast Normal University
- Changchun 130024
- China
| | - Luyan Zhang
- Department of Chemistry
- Northeast Normal University
- Changchun 130024
- China
| | - Baozhong Zhao
- Department of Chemistry
- Northeast Normal University
- Changchun 130024
- China
| | - Fushun Liang
- Department of Chemistry
- Northeast Normal University
- Changchun 130024
- China
- College of Chemistry
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50
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Wu P, Qu J, Li Y, Guo X, Tang D, Meng X, Yan R, Chen B. Iron(III)/Iodine-Catalyzed C(sp2)H Activation of α,β-Unsaturated Aldehydes/Ketones with Amidines: Synthesis of 1,2,4,5-Tetrasubstituted Imidazoles. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500701] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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