1
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Móran Plata MJ, Marretta L, Gaztelumendi L, Pieslinger GE, Carballo RR, Rezabal E, Barone G, Martínez-Martínez V, Terenzi A, Salassa L. Alloxazine-Based Ligands and Their Ruthenium Complexes as NADH Oxidation Catalysts and G4 Binders. Inorg Chem 2024; 63:16362-16373. [PMID: 39151171 DOI: 10.1021/acs.inorgchem.4c02314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/18/2024]
Abstract
Flavin-like ligands (L-1 and L-2) with extended π-conjugation were synthesized using microwave-assisted techniques. An N,N-chelating fragment was integrated into alloxazine units, providing binding sites for metal ions while retaining redox activity. The complexation capability of L-1 and L-2 with two prototypical Ru-scaffolds was examined to design Ru(II) complexes (M-1 and M-2), whose electronic properties were studied and compared with their corresponding ligands via absorption and emission spectroscopy, computational analysis (density functional theory (DFT) and time-dependent DFT (TD-DFT)), and cyclic voltammetry (CV). The ability of L-1 and M-1 to undergo alloxazine/isoalloxazine tautomerization was demonstrated to play a crucial role in the photocatalytic oxidation of NADH, including under green and red wavelengths. Moreover, the interaction of M-1 and M-2 with B-DNA and G-quadruplex structures was investigated. M-2 showed high stabilization of Kit1 and h-Telo oligonucleotides. Meanwhile, M-1 demonstrated switchable emissive properties with B-DNA and induced conformational changes in the h-Telo G-quadruplex structure.
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Affiliation(s)
- Maria Jesus Móran Plata
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, Donostia 20018, Spain
- Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia, Kimika Fakultatea, Euskal Herriko Unibertsitatea UPV/EHU, Paseo Manuel de Lardizabal 3, Donostia 20018, Spain
| | - Laura Marretta
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche, University of Palermo, viale delle Scienze Edificio 17, Palermo 90128, Italy
| | - Lander Gaztelumendi
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, Donostia 20018, Spain
- Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia, Kimika Fakultatea, Euskal Herriko Unibertsitatea UPV/EHU, Paseo Manuel de Lardizabal 3, Donostia 20018, Spain
| | - German E Pieslinger
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, Donostia 20018, Spain
- CONICET─Universidad de Buenos Aires, Instituto de Química y Fisicoquímica Biológicas (IQUIFIB), Buenos Aires 1113, Argentina
| | - Romina R Carballo
- CONICET─Universidad de Buenos Aires, Instituto de Química y Fisicoquímica Biológicas (IQUIFIB), Buenos Aires 1113, Argentina
| | - Elixabete Rezabal
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, Donostia 20018, Spain
- Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia, Kimika Fakultatea, Euskal Herriko Unibertsitatea UPV/EHU, Paseo Manuel de Lardizabal 3, Donostia 20018, Spain
| | - Giampaolo Barone
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche, University of Palermo, viale delle Scienze Edificio 17, Palermo 90128, Italy
| | | | - Alessio Terenzi
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche, University of Palermo, viale delle Scienze Edificio 17, Palermo 90128, Italy
| | - Luca Salassa
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, Donostia 20018, Spain
- Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia, Kimika Fakultatea, Euskal Herriko Unibertsitatea UPV/EHU, Paseo Manuel de Lardizabal 3, Donostia 20018, Spain
- Ikerbasque, Basque Foundation for Science, Bilbao 48011, Spain
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2
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Smith MA, Kang RJD, Kumar R, Roy B, Gaunt MJ. Modular synthesis of α-branched secondary alkylamines via visible-light-mediated carbonyl alkylative amination. Chem Sci 2024:d4sc03916e. [PMID: 39184289 PMCID: PMC11342158 DOI: 10.1039/d4sc03916e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2024] [Accepted: 08/16/2024] [Indexed: 08/27/2024] Open
Abstract
The development of methods for the assembly of secondary α-alkyl amines remains a central challenge to chemical synthesis because of their critical importance in modulating the physical properties of biologically active molecules. Despite decades of intensive research, chemists still rely on selective N-alkylation and carbonyl reductive amination to make most amine products. Here we report the further evolution of a carbonyl alkylative amination process that, for the first time, brings together primary amines, aldehydes and alkyl iodides in a visible-light-mediated multicomponent coupling reaction for the synthesis of a wide range of α-branched secondary alkylamines. In addition to exploring the tolerance and limitations in each reaction component, we also report preliminary applications to the telescoped synthesis of α-branched N-heterocycles and an N-alkylation protocol that is selective for primary over cyclic secondary amines. Our data support a mechanism involving addition of an alkyl radical to an uncharged alkyl imine which, to the best of our knowledge, has not previously been described. We believe that this method will enable practitioners of synthetic chemistry in academic and industrial settings to approach the synthesis of these important molecules in a manner that is streamlined compared to established approaches.
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Affiliation(s)
- Milo A Smith
- Yusuf Hamied Department of Chemistry, University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Ryan J D Kang
- Yusuf Hamied Department of Chemistry, University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Roopender Kumar
- Yusuf Hamied Department of Chemistry, University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Biswarup Roy
- Yusuf Hamied Department of Chemistry, University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Matthew J Gaunt
- Yusuf Hamied Department of Chemistry, University of Cambridge Lensfield Road Cambridge CB2 1EW UK
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3
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Salamanca-Perdigón K, Hurtado-Rodríguez D, Portilla J, Iriepa I, Rojas H, Becerra D, Castillo JC. Cs 2CO 3-Promoted Alkylation of 3-Cyano-2(1H)-Pyridones: Anticancer Evaluation and Molecular Docking. Chempluschem 2024:e202400172. [PMID: 38840415 DOI: 10.1002/cplu.202400172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 05/20/2024] [Accepted: 06/03/2024] [Indexed: 06/07/2024]
Abstract
Herein, a Cs2CO3-promoted N-alkylation of 3-cyano-2(1H)-pyridones containing alkyl groups with diverse alkyl halides to synthesize N-alkyl-2-pyridones over O-alkylpyridines is reported. The use of alkyl dihalides resulted in complex mixtures of N- and O-alkylated products. The primary factor influencing regioselectivity in these reactions is the electronic effects of substituents on the 2(1H)-pyridone ring, as evidenced by the preferential formation of O-alkylpyridines upon the introduction of aryl groups. Remarkably, we efficiently employed CuAAC and Ti(Oi-Pr)4-catalyzed amidation reactions to functionalize N-alkyl-2-pyridones containing propargyl and ester groups, leading to the synthesis of 1,2,3-triazoles and amides, respectively. Moreover, O-alkylpyridines 10 b and 10 d displayed remarkable selectivity toward the A-498 renal cancer cell line with growth inhibition percentages (%GI) of 54.75 and 67.64, respectively. The binding modes of compounds 10 b and 10 d to the PIM-1 kinase enzyme were determined through molecular docking studies.
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Affiliation(s)
- Kevin Salamanca-Perdigón
- Escuela de Ciencias Químicas, Universidad Pedagógica y Tecnológica de Colombia, Tunja, 150003, Colombia
| | - Diana Hurtado-Rodríguez
- Escuela de Ciencias Químicas, Universidad Pedagógica y Tecnológica de Colombia, Tunja, 150003, Colombia
| | - Jaime Portilla
- Bioorganic Compounds Research Group, Department of Chemistry, Universidad de los Andes, Carrera 1 No. 18 A-10, Bogota, 111711, Colombia
| | - Isabel Iriepa
- Departamento de Química Orgánica y Química Inorgánica, Ctra. Madrid-Barcelona, Universidad de Alcalá, Km. 33, 6, 28871, Madrid, Spain
- Institute of Chemical Research Andrés M. del Río, Universidad de Alcalá, Alcalá de Henares, 28805, Madrid, Spain
| | - Hugo Rojas
- Escuela de Ciencias Químicas, Universidad Pedagógica y Tecnológica de Colombia, Tunja, 150003, Colombia
| | - Diana Becerra
- Escuela de Ciencias Químicas, Universidad Pedagógica y Tecnológica de Colombia, Tunja, 150003, Colombia
| | - Juan-Carlos Castillo
- Escuela de Ciencias Químicas, Universidad Pedagógica y Tecnológica de Colombia, Tunja, 150003, Colombia
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4
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Caetano D, Junior LA, Carneiro J, Ducatti DRB, Gonçalves AG, Noseda MD, Duarte MER. Semisynthesis of new sulfated heterorhamnan derivatives obtained from green seaweed Gayralia brasiliensis and evaluation of their anticoagulant activity. Int J Biol Macromol 2024; 267:131506. [PMID: 38604422 DOI: 10.1016/j.ijbiomac.2024.131506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Revised: 04/04/2024] [Accepted: 04/08/2024] [Indexed: 04/13/2024]
Abstract
Marine green algae produce sulfated polysaccharides with diverse structures and a wide range of biological activities. This study aimed to enhance the biotechnological potential of sulfated heterorhamnan (Gb1) from Gayralia brasiliensis by chemically modifying it for improved or new biological functions. Using controlled Smith Degradation (GBS) and O-alkylation with 3-chloropropylamine, we synthesized partially water-soluble amine derivatives. GBS modification increase sulfate groups (29.3 to 37.5 %) and α-l-rhamnose units (69.9 to 81.2 mol%), reducing xylose and glucose, compared to Gb1. The backbone featured predominantly 3- and 2-linked α-l-rhamnosyl and 2,3- linked α-l-rhamnosyl units as branching points. Infrared and NMR analyses confirmed the substitution of hydroxyl groups with aminoalkyl groups. The modified compounds, GBS-AHCs and GBS-AHK, exhibited altered anticoagulant properties. GBS-AHCs showed reduced effectiveness in the APTT assay, while GBS-AHK maintained a similar anticoagulant activity level to Gb1 and GBS. Increased nitrogen content and N-alkylation in GBS-AHCs compared to GBS-AHK may explain their structural differences. The chemical modification proposed did not enhance its anticoagulant activity, possibly due to the introduction of amino groups and a positive charge to the polymer. This characteristic presents new opportunities for investigating the potential of these polysaccharides in various biological applications, such as antimicrobial and antitumoral activities.
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Affiliation(s)
- Danielly Caetano
- Pós-graduação em Engenharia de Bioprocessos e Biotecnologia, Universidade Federal do Paraná, Curitiba, Paraná, Brazil.
| | - Lauri Alves Junior
- Pós-graduação em Ciências - Bioquímica, Universidade Federal do Paraná, Curitiba, Paraná, Brazil.
| | - Jaqueline Carneiro
- Departamento de Farmácia, Universidade Federal do Paraná, Curitiba, Paraná, Brazil.
| | - Diogo R B Ducatti
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Paraná, Curitiba, Paraná, Brazil.
| | | | - Miguel D Noseda
- Pós-graduação em Engenharia de Bioprocessos e Biotecnologia, Universidade Federal do Paraná, Curitiba, Paraná, Brazil; Pós-graduação em Ciências - Bioquímica, Universidade Federal do Paraná, Curitiba, Paraná, Brazil; Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Paraná, Curitiba, Paraná, Brazil.
| | - Maria Eugênia R Duarte
- Pós-graduação em Engenharia de Bioprocessos e Biotecnologia, Universidade Federal do Paraná, Curitiba, Paraná, Brazil; Pós-graduação em Ciências - Bioquímica, Universidade Federal do Paraná, Curitiba, Paraná, Brazil; Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Paraná, Curitiba, Paraná, Brazil.
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5
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Shukla G, Singh M, Kumar Yadav A, Shankar Singh M. Aromatic C(sp 2 )-H Functionalization by Consecutive Paired Electrolysis: Dibromination of Aryl Amines with Dibromoethane at Room Temperature. Chemistry 2023:e202303179. [PMID: 38078727 DOI: 10.1002/chem.202303179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Indexed: 12/23/2023]
Abstract
Herein, we disclose a facile and efficient electrochemical method for the dibromination of aryl amines by double functionalization of aromatic C(sp2 )-H (both para and ortho) under metal- and external oxidant-free conditions at room temperature for the first time. The reaction is demonstrated using 1,2-dibromoethane to dibrominate a wide range of N-substituted aryl amines in a simple setup with C(+)/Pt(-) electrodes under mild reaction conditions. This transformation proceeds smoothly with a broad substrate scope affording the valuable and versatile N-substituted 2,4-dibromoanilines in moderate to excellent yields with high regioselectivity. In this paired electrolysis, cathodic reduction of 1,2-DBE followed by anodic oxidation generates bromonium intermediates, which then couple with anilines to furnish the dibrominated products. It represents a distinctive approach to challenging redox-neutral reactions. The versatility of the electrochemical ortho-, para-dibromination was reflected by unique regioselectivities for challenging aryl amines and gram-scale electrosynthesis without the use of a stoichiometric oxidant or an activating agent.
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Affiliation(s)
- Gaurav Shukla
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Malkeet Singh
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Anup Kumar Yadav
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Maya Shankar Singh
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
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6
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Luo R, Tong J, Ouyang L, Liu L, Liao J. One-pot reductive amination of carbonyl compounds and nitro compounds via Ir-catalyzed transfer hydrogenation. RSC Adv 2023; 13:29607-29612. [PMID: 37818258 PMCID: PMC10561669 DOI: 10.1039/d3ra05736d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Accepted: 09/25/2023] [Indexed: 10/12/2023] Open
Abstract
The formation of C-N bond is a vital synthetic tool for establishing molecular diversity, which is highly sought after in a wide range of biologically active natural products and drugs. Herein, we present a new strategy for the synthesis of secondary amines via iridium-catalyzed one-pot reductive amination of carbonyl compounds with nitro compounds. This method is demonstrated for a variety of carbonyl compounds, including miscellaneous aldehydes and ketones, which are compatible with this catalytic system, and deliver the desired products in good yields under mild conditions. In this protocol, the reduction of nitro compounds occurs in situ first, followed by reductive amination to form amine products, providing a new one-pot procedure for amine synthesis.
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Affiliation(s)
- Renshi Luo
- College of Chemistry and Environmental Engineering, Shaoguan University Shaoguan 512005 P. R. China
- School of Pharmaceutical Sciences, Gannan Medical University Ganzhou 341000 Jiangxi Province P. R. China
| | - Jinghui Tong
- School of Pharmaceutical Sciences, Gannan Medical University Ganzhou 341000 Jiangxi Province P. R. China
| | - Lu Ouyang
- School of Pharmaceutical Sciences, Gannan Medical University Ganzhou 341000 Jiangxi Province P. R. China
| | - Liang Liu
- School of Pharmaceutical Sciences, Gannan Medical University Ganzhou 341000 Jiangxi Province P. R. China
| | - Jianhua Liao
- School of Pharmaceutical Sciences, Gannan Medical University Ganzhou 341000 Jiangxi Province P. R. China
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7
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Stivala CE, Zbieg JR, Liu P, Krische MJ. Chiral Amines via Enantioselective π-Allyliridium- C, O-Benzoate-Catalyzed Allylic Alkylation: Student Training via Industrial-Academic Collaboration. Acc Chem Res 2022; 55:2138-2147. [PMID: 35830564 PMCID: PMC9608351 DOI: 10.1021/acs.accounts.2c00302] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
ConspectusCyclometalated π-allyliridium-C,O-benzoate complexes discovered in the Krische laboratory display unique amphiphilic properties, catalyzing both nucleophilic carbonyl allylation and electrophilic allylation of diverse amines as well as nitronates. Given the importance of chiral amines in FDA-approved small-molecule drugs, a collaboration with medicinal chemists at Genentech that included on-site graduate student internships was undertaken to explore and expand the scope of π-allyliridium-C,O-benzoate-catalyzed allylic amination and related processes. As described in this Account, our collective experimental studies have unlocked asymmetric allylic aminations of exceptionally broad utility and scope. Specifically, using racemic branched alkyl-substituted allylic acetate proelectrophiles, primary and secondary aliphatic or aromatic amines, including indoles, engage in highly regio- and enantioselective allylic amination. Additionally, unactivated nitronates were found to be competent nucleophilic partners for regio- and enantioselective allylic alkylation, enabling entry to β-stereogenic α-quaternary primary amines. Notably, these π-allyliridium-C,O-benzoate-catalyzed allylic substitutions, which display complete branched regioselectivity in reactions of alkyl-substituted allyl electrophiles, complement the scope of corresponding iridium phosphoramidite-catalyzed allylic aminations, which require aryl-substituted allyl electrophiles to promote high levels of branched regioselectivity. Computational, kinetic, ESI-CID-MS, and isotopic labeling studies were undertaken to understand the mechanism of these processes, including the origins of regio- and enantioselectivity. Isotopic labeling studies suggest that C-N bond formation occurs through outer-sphere addition to the π-allyl. DFT calculations corroborate C-N bond formation via outer-sphere addition and suggest that early transition states and distinct trans effects of diastereomeric chiral-at-iridium π-allyl complexes render the reaction less sensitive to steric effects, accounting for complete levels of branched regioselectivity in reactions of hindered amine and nitronate nucleophiles. Reaction progress kinetic analysis (RPKA) reveals a zero-order dependence on allyl acetate, a first-order dependence on the catalyst, and a fractional-order dependence on the amine. As corroborated by ESI-CID-MS analysis, the 0.4 kinetic order dependence on the amine may reflect the intervention of cesium-bridged amine dimers, which dissociate to form monomeric cesium amide nucleophiles. Hence, the requirement of cesium carbonate (vs lower alkali metal carbonates) in these processes may reside in cesium's capacity for Lewis acid-enhanced Brønsted acidification of the amine pronucleophile. Beyond the development of catalytic processes for the synthesis of novel chiral amines, the present research was conducted by graduate students who benefited from career development experiences associated with training in both academic and industrial laboratories.
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Affiliation(s)
- Craig E Stivala
- Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Jason R Zbieg
- Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Peng Liu
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Michael J Krische
- Department of Chemistry, University of Texas at Austin, Austin, Texas 78712, United States
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8
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Synthesis of fluoro and trifluoromethyl substituents containing novel tetracyclic N-benzylated benzopiperazine fused acridone regioisomers using a greener solvent 2-MeTHF and their DFT studies. J Fluor Chem 2022. [DOI: 10.1016/j.jfluchem.2022.109989] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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9
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Ma H, Brust T, Frankowski KJ, Lovell KM, Cameron MD, Bohn LM, Aubé J. Advances in Sulfonamide Kappa Opioid Receptor Antagonists: Structural Refinement and Evaluation of CNS Clearance. ACS Chem Neurosci 2022; 13:1315-1332. [PMID: 35410469 DOI: 10.1021/acschemneuro.2c00140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Focused modification of a sulfonamide-based kappa opioid receptor (KOR) antagonist series previously reported by this laboratory was investigated. A total of 32 analogues were prepared to explore linker replacement, constraint manipulation, and aryl group or amine substitution. All analogues were assayed for KOR antagonist activity, and the initial lead compound was assessed for in vivo CNS penetration. The most improved analogue possessed a 4-fold increase of potency (IC50 = 18.9 ± 4.4 nM) compared with the lead compound (IC50 = 83.5 ± 20 nM) from an earlier work. The initial lead compound was found to attain suitable brain levels and to possess a shorter clearance time than canonical KOR antagonists such as JDTic.
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Affiliation(s)
- Huiyong Ma
- Center for Integrative Chemical Biology and Drug Discovery, UNC Eshelman School of Pharmacy, 125 Mason Farm Road, CB 7363, Chapel Hill, North Carolina 27599, United States
- Department of Medicinal Chemistry, University of Kansas, 2034 Becker Drive, Lawrence, Kansas 66047, United States
| | - Tarsis Brust
- Departments of Molecular Therapeutics and Neuroscience, The Scripps Research Institute, 130 Scripps Way, #2A2, Jupiter, Florida 33458, United States
| | - Kevin J Frankowski
- Center for Integrative Chemical Biology and Drug Discovery, UNC Eshelman School of Pharmacy, 125 Mason Farm Road, CB 7363, Chapel Hill, North Carolina 27599, United States
- Department of Medicinal Chemistry, University of Kansas, 2034 Becker Drive, Lawrence, Kansas 66047, United States
| | - Kimberly M Lovell
- Departments of Molecular Therapeutics and Neuroscience, The Scripps Research Institute, 130 Scripps Way, #2A2, Jupiter, Florida 33458, United States
| | - Michael D Cameron
- Department of Molecular Therapeutics, The Scripps Research Institute, 130 Scripps Way, #2A1, Jupiter, Florida 33458, United States
| | - Laura M Bohn
- Departments of Molecular Therapeutics and Neuroscience, The Scripps Research Institute, 130 Scripps Way, #2A2, Jupiter, Florida 33458, United States
| | - Jeffrey Aubé
- Center for Integrative Chemical Biology and Drug Discovery, UNC Eshelman School of Pharmacy, 125 Mason Farm Road, CB 7363, Chapel Hill, North Carolina 27599, United States
- Department of Medicinal Chemistry, University of Kansas, 2034 Becker Drive, Lawrence, Kansas 66047, United States
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10
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Jung WO, Mai BK, Yoo M, Shields SWJ, Zbieg JR, Stivala CE, Liu P, Krische MJ. Kinetic, ESI-CID-MS and Computational Studies of π-Allyliridium C,O-Benzoate-Catalyzed Allylic Amination: Understanding the Effect of Cesium Ion. ACS Catal 2022; 12:3660-3668. [PMID: 36092640 PMCID: PMC9456326 DOI: 10.1021/acscatal.2c00470] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The mechanism of π-allyliridium C,O-benzoate-catalyzed allylic amination was studied by (a) reaction progress kinetic analysis (RPKA), (b) tandem ESI-MS analysis, and (c) computational studies involving density functional theory (DFT) calculations. Reaction progress kinetic analysis (RPKA) reveals a zero-order dependence on allyl acetate, first-order dependence on catalyst and fractional-order dependence on amine. These data corroborate rapid ionization of the allylic acetate followed by turnover limiting C-N bond formation. To illuminate the origins of the 0.4 kinetic order dependence on amine, ESI-MS analyses of quaternary ammonium-labelled piperazine with multistage collision induced dissociation (CID) were conducted that corroborate intervention of cesium-bridged amine dimers that dissociate to form monomeric cesium amide nucleophiles. Computational data align with RPKA and ESI-CID-MS analyses and suggest early transition states mitigate the impact of steric factors, thus enabling formation of highly substituted C-N bonds with complete levels of branched regioselectivity. Specifically, trans-effects of the iridium complex facilitate nucleophilic attack at the more substituted allyl terminus trans to phosphorus with enantioselectivity governed by steric repulsions between the chiral bisphosphine ligand and the π-allyl of a dominant diastereomer of the stereogenic-at-metal complex. Beyond defining aspects of the mechanism of π-allyliridium C,O-benzoate-catalyzed allylic amination, these data reveal that a key feature of cesium carbonate not only lies in its enhanced basicity, but also its capacity for Lewis-acid enhanced Brønsted acidification of amines.
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Affiliation(s)
- Woo-Ok Jung
- University of Texas at Austin, Department of Chemistry, Austin, TX 78712, USA
| | - Binh Khanh Mai
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Minjin Yoo
- University of Texas at Austin, Department of Chemistry, Austin, TX 78712, USA
| | - Samuel W J Shields
- University of Texas at Austin, Department of Chemistry, Austin, TX 78712, USA
| | - Jason R Zbieg
- Discovery Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, USA
| | - Craig E Stivala
- Discovery Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, USA
| | - Peng Liu
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Michael J Krische
- University of Texas at Austin, Department of Chemistry, Austin, TX 78712, USA
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11
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Zhao H, Li B, Zhao H, Li J, Kou J, Zhu H, Liu B, Li Z, Sun X, Dong Z. Construction of a sandwich-like UiO-66-NH 2@Pt@mSiO 2 catalyst for one-pot cascade reductive amination of nitrobenzene with benzaldehyde. J Colloid Interface Sci 2022; 606:1524-1533. [PMID: 34500155 DOI: 10.1016/j.jcis.2021.08.081] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 08/08/2021] [Accepted: 08/09/2021] [Indexed: 10/20/2022]
Abstract
Heterogeneous noble metal-based catalysts with stable, precise structures and high catalytic performance are of great research interest for sustainable catalysis. Herein, we designed the novel sandwich-like metal-organic-framework composite nanocatalyst UiO-66-NH2@Pt@mSiO2 using UiO-66-NH2@Pt as the core, and mesoporous SiO2 as the shell. The obtained UiO-66-NH2@Pt@mSiO2 catalyst shows a well-defined structure and interface, and the protection of the mSiO2 shell can efficiently prevent Pt NPs from aggregating and leaching in the reaction process. In the one-pot cascade reaction of nitroarenes and aromatic aldehydes to secondary amines, UiO-66-NH2@Pt@mSiO2 shows excellent catalytic performance due to acid catalytic sites provided by UiO-66-NH2 and Pt hydrogenation catalytic sites. Furthermore, the porous structure of the UiO-66-NH2@Pt@mSiO2 catalyst also enhances reactant diffusion and improves the reaction efficiency. This work provides a new avenue to meticulously design well-defined nanocatalysts with superior catalytic performance and stability for challenging reactions.
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Affiliation(s)
- Hong Zhao
- State Key Laboratory of Applied Organic Chemistry, Laboratory of Special Function Materials and Structure Design of the Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
| | - Boyang Li
- State Key Laboratory of Applied Organic Chemistry, Laboratory of Special Function Materials and Structure Design of the Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
| | - Huacheng Zhao
- State Key Laboratory of Applied Organic Chemistry, Laboratory of Special Function Materials and Structure Design of the Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
| | - Jianfeng Li
- State Key Laboratory of Applied Organic Chemistry, Laboratory of Special Function Materials and Structure Design of the Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
| | - Jinfang Kou
- State Key Laboratory of Applied Organic Chemistry, Laboratory of Special Function Materials and Structure Design of the Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
| | - Hanghang Zhu
- State Key Laboratory of Applied Organic Chemistry, Laboratory of Special Function Materials and Structure Design of the Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
| | - Bing Liu
- Key Laboratory of Catalysis and Materials Sciences of the Ministry of Education, South-Central University for Nationalities, Wuhan 430074, PR China.
| | - Zhenhua Li
- Key Laboratory of Environmental Friendly Composite Materials and Biomass in Universities of Gansu Province, Northwest Minzu University, Lanzhou 730030, PR China.
| | - Xun Sun
- Shandong Applied Research Center of Gold Nanotechnology (Au-SDARC), School of Chemistry & Chemical Engineering, Yantai University, Yantai 264005, PR China.
| | - Zhengping Dong
- State Key Laboratory of Applied Organic Chemistry, Laboratory of Special Function Materials and Structure Design of the Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China.
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12
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Tarawneh A. A New and Convenient Synthetic Method for 4-Aminoquinoline-3-carbonitrile and Its Derivatives. HETEROCYCLES 2022. [DOI: 10.3987/com-21-14610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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13
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Góralczyk-Bińkowska A, Długoński A, Bernat P, Długoński J, Jasińska A. Environmental and molecular approach to dye industry waste degradation by the ascomycete fungus Nectriella pironii. Sci Rep 2021; 11:23829. [PMID: 34903810 PMCID: PMC8669018 DOI: 10.1038/s41598-021-03446-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Accepted: 11/26/2021] [Indexed: 11/15/2022] Open
Abstract
Textile industry effluents and landfill leachate contain chemicals such as dyes, heavy metals and aromatic amines characterized by their mutagenicity, cytotoxicity and carcinogenicity. The aim of the present study was investigation of the ascomycete fungus N. pironii isolated from urban postindustrial textile green space for its ability to grow and retain metabolic activity in the presence of the dye industry waste. Research focused mainly on dyes, heavy metals and aromatic amines, which had been detected in landfill leachate via HPLC-MS/MS analysis. Presence of all tested compounds as well as leachate in the growth medium clearly favored the growth of fungal biomass. Only slight growth limitation was observed in the presence of 50 mg L-1 o-tolidine. The fungus eliminated o-tolidine as well as dyes at all tested concentrations. The presence of metals slightly influenced the decolorization of the azo dyes; however, it was still similar to 90%. During fungal growth, o-tolidine was hydroxylated and/or converted to toluidine and its derivatives. Laccase and cytochrome P450 involvement in this process has been revealed. The results presented in the paper provide a valuable background for the development of a fungus-based system for the elimination of toxic pollutants generated by the textile industry.
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Affiliation(s)
- Aleksandra Góralczyk-Bińkowska
- Department of Industrial Microbiology and Biotechnology, Faculty of Biology and Environmental Protection, University of Łódź, 12/16 Banacha Street, 90-237, Łódź, Poland
| | - Andrzej Długoński
- Institute of Biological Sciences, Faculty of Biology and Environmental Sciences, Cardinal Stefan Wyszyński University in Warsaw, 1/3 Wóycickiego Street, 01-938, Warsaw, Poland
| | - Przemysław Bernat
- Department of Industrial Microbiology and Biotechnology, Faculty of Biology and Environmental Protection, University of Łódź, 12/16 Banacha Street, 90-237, Łódź, Poland
| | - Jerzy Długoński
- Department of Industrial Microbiology and Biotechnology, Faculty of Biology and Environmental Protection, University of Łódź, 12/16 Banacha Street, 90-237, Łódź, Poland.
| | - Anna Jasińska
- Department of Industrial Microbiology and Biotechnology, Faculty of Biology and Environmental Protection, University of Łódź, 12/16 Banacha Street, 90-237, Łódź, Poland.
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14
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Merchan‐Arenas DR, Rivero‐Jerez PS, Pérez EG. Synthesis of
N
‐arylsulfonamides via Chan‐Lam Coupling Between Aryl Boronic Acids and
N
‐[(sulfonyl)imino]phenyliodinanes. ChemistrySelect 2021. [DOI: 10.1002/slct.202103876] [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)
- Diego R. Merchan‐Arenas
- Department of Organic Chemistry Faculty of Chemistry and Pharmacy Pontificia Universidad Católica de Chile Av. Vicuña Mackenna 4860 Santiago 7820436 Santiago Chile
| | - Paula S. Rivero‐Jerez
- Department of Organic Chemistry Faculty of Chemistry and Pharmacy Pontificia Universidad Católica de Chile Av. Vicuña Mackenna 4860 Santiago 7820436 Santiago Chile
| | - Edwin G. Pérez
- Department of Organic Chemistry Faculty of Chemistry and Pharmacy Pontificia Universidad Católica de Chile Av. Vicuña Mackenna 4860 Santiago 7820436 Santiago Chile
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15
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Zhang X, Zhang J, Hao Z, Han Z, Lin J, Lu GL. Nickel Complexes Bearing N,N,O-Tridentate Salicylaldiminato Ligand: Efficient Catalysts for Imines Formation via Dehydrogenative Coupling of Primary Alcohols with Amines. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00552] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xiaoying Zhang
- National Experimental Chemistry Teaching Center (Hebei Normal University), Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang 050024, People’s Republic of China
| | - Junhua Zhang
- National Experimental Chemistry Teaching Center (Hebei Normal University), Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang 050024, People’s Republic of China
| | - Zhiqiang Hao
- National Experimental Chemistry Teaching Center (Hebei Normal University), Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang 050024, People’s Republic of China
| | - Zhangang Han
- National Experimental Chemistry Teaching Center (Hebei Normal University), Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang 050024, People’s Republic of China
| | - Jin Lin
- National Experimental Chemistry Teaching Center (Hebei Normal University), Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang 050024, People’s Republic of China
| | - Guo-Liang Lu
- Auckland Cancer Society Research Centre, Faculty of Medical and Health Sciences, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
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16
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Mirza‐Aghayan M, Saeedi M, Boukherroub R. Carbon–nitrogen bond formation using modified graphene oxide derivatives decorated with copper complexes and nanoparticles. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Mandana Saeedi
- Chemistry and Chemical Engineering Research Center of Iran (CCERCI) Tehran Iran
| | - Rabah Boukherroub
- Institute of Electronics, Microelectronics and Nanotechnology (IEMN), UMR8520 Univ. Lille, CNRS, Centrale Lille, Univ. Polytechnique Hauts‐de‐France Lille France
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17
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Synthesis, Characterization, and DFT Studies of N-(3,5-Bis(trifluoromethyl)benzyl)stearamide. MOLBANK 2021. [DOI: 10.3390/m1215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The novel N-(3,5-bis(trifluoromethyl)benzyl)stearamide 3 was prepared in moderate yield by a solventless direct amidation reaction of stearic acid 1 with 3,5-bis(trifluoromethyl)benzylamine 2 at 140 °C for 24 h under metal- and catalyst-free conditions. This practical method was conducted in air without any special treatment or activation. The fatty acid amide 3 was fully characterized by IR, UV–Vis, 1D and 2D NMR spectroscopy, mass spectrometry, and elemental analysis. Moreover, molecular electrostatic potential studies, determination of quantum descriptors, fundamental vibrational frequencies, and intensity of vibrational bands were computed by density functional theory (DFT) using the B3LYP method with 6-311+G(d,p) basis set in gas phase. Simulation of the infrared spectrum using the results of these calculations led to good agreement with the observed spectral patterns.
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18
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Abstract
We reported an efficient one-pot two-step synthesis of 3-(tert-butyl)-N-(4-methoxybenzyl)-1-methyl-1H-pyrazol-5-amine 3 in good yield by a solvent-free condensation/reduction reaction sequence starting from 3-(tert-butyl)-1-methyl-1H-pyrazol-5-amine 1 and p-methoxybenzaldehyde 2. The one-pot reductive amination proceeded by the formation in situ of the N-(5-pyrazolyl)imine 4 as key synthetic intermediate of other valuable pyrazole derivatives. This methodology is distinguished by its operational easiness, short reaction time, isolation and purification of the aldimine intermediate is not required. The structure of the synthesized N-heterocyclic amine 3 was fully characterized by FTIR-ATR, 1D and 2D NMR experiments, EIMS, and elemental analysis.
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19
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Design, synthesis, antibacterial evaluation and molecular docking studies of novel pyrazole/1,2,4-oxadiazole conjugate ester derivatives. Med Chem Res 2021. [DOI: 10.1007/s00044-021-02710-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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20
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Prabha D, Pachisia S, Gupta R. Cobalt mediated N-alkylation of amines by alcohols: role of hydrogen bonding pocket. Inorg Chem Front 2021. [DOI: 10.1039/d0qi01374a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Cobalt complexes of amide-based pincers provide a H-bonding pocket that binds a reagent in the vicinity of the metal center. These complexes function as catalysts for the N-alkylation of amines using alcohols via a borrowing hydrogen strategy.
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Affiliation(s)
- Divya Prabha
- Department of Chemistry
- University of Delhi
- Delhi – 110 007
- India
| | - Sanya Pachisia
- Department of Chemistry
- University of Delhi
- Delhi – 110 007
- India
| | - Rajeev Gupta
- Department of Chemistry
- University of Delhi
- Delhi – 110 007
- India
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21
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Goyal V, Sarki N, Poddar MK, Narani A, Tripathi D, Ray A, Natte K. Biorenewable carbon-supported Ru catalyst for N-alkylation of amines with alcohols and selective hydrogenation of nitroarenes. NEW J CHEM 2021. [DOI: 10.1039/d1nj01654g] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A renewable carbon-supported Ru catalyst (Ru/PNC-700) facilely prepared via simple impregnation followed by the pyrolysis process for N-alkylation of anilines with benzyl alcohol and chemoselective hydrogenation of nitroarenes.
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Affiliation(s)
- Vishakha Goyal
- Chemical and Material Sciences Division
- Light Stock Processing Division
- Biofuels Division
- Analytical Sciences Division
- CSIR–Indian Institute of Petroleum
| | - Naina Sarki
- Chemical and Material Sciences Division
- Light Stock Processing Division
- Biofuels Division
- Analytical Sciences Division
- CSIR–Indian Institute of Petroleum
| | - Mukesh Kumar Poddar
- Chemical and Material Sciences Division
- Light Stock Processing Division
- Biofuels Division
- Analytical Sciences Division
- CSIR–Indian Institute of Petroleum
| | - Anand Narani
- Chemical and Material Sciences Division
- Light Stock Processing Division
- Biofuels Division
- Analytical Sciences Division
- CSIR–Indian Institute of Petroleum
| | - Deependra Tripathi
- Chemical and Material Sciences Division
- Light Stock Processing Division
- Biofuels Division
- Analytical Sciences Division
- CSIR–Indian Institute of Petroleum
| | - Anjan Ray
- Chemical and Material Sciences Division
- Light Stock Processing Division
- Biofuels Division
- Analytical Sciences Division
- CSIR–Indian Institute of Petroleum
| | - Kishore Natte
- Chemical and Material Sciences Division
- Light Stock Processing Division
- Biofuels Division
- Analytical Sciences Division
- CSIR–Indian Institute of Petroleum
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22
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Castillo JC, Bravo NF, Tamayo LV, Mestizo PD, Hurtado J, Macías M, Portilla J. Water-Compatible Synthesis of 1,2,3-Triazoles under Ultrasonic Conditions by a Cu(I) Complex-Mediated Click Reaction. ACS OMEGA 2020; 5:30148-30159. [PMID: 33251449 PMCID: PMC7689893 DOI: 10.1021/acsomega.0c04592] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Accepted: 10/16/2020] [Indexed: 05/04/2023]
Abstract
A new monophosphine Cu(I) complex bearing bis(pyrazolyl)methane (L 1 ) (CuIL 1 PPh 3 ) was synthesized and used as a catalyst for the three-component click reaction from an alkyl halide, sodium azide, and terminal alkyne to furnish 1,4-disubstituted 1,2,3-triazoles in up to 93% yield. The catalyst is highly stable, compatible with oxygen/water, and works with total efficiency under ultrasonic condition. The structure of the complex was studied and confirmed by X-ray crystallography, finding a riveting relationship with its catalytic activity. This sustainable triazoles synthesis is distinguished by its high atom economy, low catalyst loading (up to 0.5 mol %), broad substrate scope, short reaction times, operational simplicity, and an easy gram-scale supply of a functionalized product for subsequent synthetic applications.
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Affiliation(s)
- Juan-Carlos Castillo
- Bioorganic
Compounds Research Group, Department of Chemistry, Universidad de los Andes, Carrera 1 No. 18A-10, 111711 Bogotá, Colombia
- Escuela
de Ciencias Química, Universidad
Pedagógica y Tecnológica de Colombia, Avenida Central del Norte 39-115, Tunja 150003, Colombia
| | - Nestor-Fabian Bravo
- Bioorganic
Compounds Research Group, Department of Chemistry, Universidad de los Andes, Carrera 1 No. 18A-10, 111711 Bogotá, Colombia
| | - Lenka-Victoria Tamayo
- Grupo
de Investigación en Química Inorgánica, Catálisis
y Bioinorgánica, Department of Chemistry, Universidad de los Andes, Carrera 1 No. 18A-10, Bogotá 111711, Colombia
| | - Paula-Daniela Mestizo
- Grupo
de Investigación en Química Inorgánica, Catálisis
y Bioinorgánica, Department of Chemistry, Universidad de los Andes, Carrera 1 No. 18A-10, Bogotá 111711, Colombia
| | - John Hurtado
- Grupo
de Investigación en Química Inorgánica, Catálisis
y Bioinorgánica, Department of Chemistry, Universidad de los Andes, Carrera 1 No. 18A-10, Bogotá 111711, Colombia
| | - Mario Macías
- Department
of Chemistry, Universidad de los Andes, Carrera 1 No. 18A-10, Bogotá 111711, Colombia
| | - Jaime Portilla
- Bioorganic
Compounds Research Group, Department of Chemistry, Universidad de los Andes, Carrera 1 No. 18A-10, 111711 Bogotá, Colombia
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23
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Pantalon Juraj N, Krklec M, Novosel T, Perić B, Vianello R, Raić-Malić S, Kirin SI. Copper(ii) and zinc(ii) complexes of mono- and bis-1,2,3-triazole-substituted heterocyclic ligands. Dalton Trans 2020; 49:9002-9015. [PMID: 32558875 DOI: 10.1039/d0dt01244k] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Chelating 1,4-disubstituted mono- (8a-8d) and bis-1,2,3-triazole-based (9a-11a) ligands were prepared by regioselective copper(i)-catalysed 1,3-dipolar cycloaddition of terminal alkynes with aromatic azides, together with bioconjugate 13a synthesized by amide coupling of l-phenylalanine methyl ester to 11a. Cu(ii) and Zn(ii) complexes were prepared and single crystal structures were determined for complexes 8aCu, 8dCu, 9cCu and 10cCu, as well as the free ligands 10a and 10c. The in situ prepared Zn(ii) complexes were studied by NMR spectroscopy, while the stoichiometry of the Cu(ii) complexes in solution was determined by UV-Vis titrations and confirmed by the electronic structure DFT calculations at the (SMD)/M05-2X/6-31+G(d)/LanL2DZ+ECP level of theory.
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24
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Pettit GR, Melody N, Chapuis JC. Antineoplastic Agents. 607. Emetine Auristatins. JOURNAL OF NATURAL PRODUCTS 2020; 83:1571-1576. [PMID: 32323990 DOI: 10.1021/acs.jnatprod.0c00031] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The remarkable biological activity of the dolastatin 10 structural modifications quinstatins and isoquinstatins prompted further investigation into drug hybrids containing biologically active isoquinoline moieties. In this study, the isoquinoline alkaloid emetine was selected as one of the structural domains of a hybrid molecule. That was accomplished by covalently bonding the Dov-Val-Dil-Dap peptide sequence of dolastatin 10 peptide at the N-2' secondary amine of emetine. Three new hybrids were synthesized, 5, 9, and 10. Comparison of the biological activity of these new peptide-emetine analogues with emetine showed complete retention of activity for 5 and a 10-fold decrease for hybrids 9 and 10. The result was surprising, as the activity of emetine is usually lost or greatly reduced when substituted at the N-2' position.
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Affiliation(s)
- George R Pettit
- School of Molecular Sciences, Arizona State University, P.O. Box 871604, Tempe, Arizona 85287-1604, United States
| | - Noeleen Melody
- School of Molecular Sciences, Arizona State University, P.O. Box 871604, Tempe, Arizona 85287-1604, United States
| | - Jean-Charles Chapuis
- School of Molecular Sciences, Arizona State University, P.O. Box 871604, Tempe, Arizona 85287-1604, United States
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25
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Hossain I, Schmidt JAR. Nickel(II) Catalyzed Hydroboration: A Route to Selective Reduction of Aldehydes and
N
‐Allylimines. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000092] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Istiak Hossain
- Department of Chemistry and Biochemistry School of Green Chemistry and Engineering College of Natural Sciences and Mathematics The University of Toledo 2801 W. Bancroft St. MS 602 43606‐3390 Toledo Ohio USA
| | - Joseph A. R. Schmidt
- Department of Chemistry and Biochemistry School of Green Chemistry and Engineering College of Natural Sciences and Mathematics The University of Toledo 2801 W. Bancroft St. MS 602 43606‐3390 Toledo Ohio USA
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26
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Panday A, Ali D, Choudhury LH. Cs 2CO 3-Mediated Rapid Room-Temperature Synthesis of 3-Amino-2-aroyl Benzofurans and Their Copper-Catalyzed N-Arylation Reactions. ACS OMEGA 2020; 5:3646-3660. [PMID: 32118180 PMCID: PMC7045548 DOI: 10.1021/acsomega.9b04169] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Accepted: 01/21/2020] [Indexed: 05/04/2023]
Abstract
Cs2CO3 in dimethylformamide (DMF) is a perfect combination for the rapid room-temperature synthesis of 3-amino-2-aroyl benzofuran derivatives from the reaction of 2-hydroxybenzonitriles and 2-bromoacetophenones in good to excellent yields. Using this one-pot C-C and C-O bond-forming strategy, we prepared a series of 3-amino-2-aroyl benzofuran derivatives within a very short time (10-20 min). This method was also found suitable for gram-scale synthesis. Benzofurans (3) obtained by this Cs2CO3-mediated methodology were then further explored for the development of a tunable base- and ligand-free copper-catalyzed N-arylation methodology using arylboronic acids for the easy access of either mono- or bi-N-aryl derivatives of aminobenzofurans at ambient temperature. The reaction of 3 with malononitrile in DMF medium under microwave heating conditions provided highly fluorescent conjugated alkenes and novel pyridine-fused benzofurans.
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27
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Ng JPL, Coghi P, Law BYK, Liu L, Wong VKW. The present and future synthetic strategies of structural modifications of sinomenine. Org Chem Front 2020. [DOI: 10.1039/d0qo00785d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
This review summarizes the modifications of sinomenine, a hot compound derived from herbal plants, which possesses diverse biological activities and low cytotoxicity.
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Affiliation(s)
- Jerome P. L. Ng
- State Key Laboratory of Quality Research in Chinese Medicine
- Macau University of Science and Technology
- Taipa
- China
| | - Paolo Coghi
- School of Pharmacy
- Macau University of Science and Technology
- Taipa
- China
| | - Betty Yuen Kwan Law
- State Key Laboratory of Quality Research in Chinese Medicine
- Macau University of Science and Technology
- Taipa
- China
| | - Liang Liu
- State Key Laboratory of Quality Research in Chinese Medicine
- Macau University of Science and Technology
- Taipa
- China
| | - Vincent Kam Wai Wong
- State Key Laboratory of Quality Research in Chinese Medicine
- Macau University of Science and Technology
- Taipa
- China
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28
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Segobia D, Trasarti A, Apesteguía C. Selective one-pot synthesis of asymmetric secondary amines via N-alkylation of nitriles with alcohols. J Catal 2019. [DOI: 10.1016/j.jcat.2019.10.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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29
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Tiwari MK, Yadav L, Kumar Shyamlal BR, Chaudhary S. Weak Bases‐Mediated Modified Favorskii Reaction‐Type Direct Alkynylation/(
E
)‐Alkenylation: A Unified Rapid Access to α,β‐Unsaturated Ketones and Propargyl Alcohols. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900601] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Mohit K. Tiwari
- Laboratory of Organic and Medicinal ChemistryDepartment of Chemistry Malaviya National Institute of Technology Jaipur Jawaharlal Nehru Marg Jaipur- 302017 India
| | - Lalit Yadav
- Laboratory of Organic and Medicinal ChemistryDepartment of Chemistry Malaviya National Institute of Technology Jaipur Jawaharlal Nehru Marg Jaipur- 302017 India
| | - Bharti Rajesh Kumar Shyamlal
- Laboratory of Organic and Medicinal ChemistryDepartment of Chemistry Malaviya National Institute of Technology Jaipur Jawaharlal Nehru Marg Jaipur- 302017 India
| | - Sandeep Chaudhary
- Laboratory of Organic and Medicinal ChemistryDepartment of Chemistry Malaviya National Institute of Technology Jaipur Jawaharlal Nehru Marg Jaipur- 302017 India
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30
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Subaramanian M, Midya SP, Ramar PM, Balaraman E. General Synthesis of N-Alkylation of Amines with Secondary Alcohols via Hydrogen Autotransfer. Org Lett 2019; 21:8899-8903. [DOI: 10.1021/acs.orglett.9b02990] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Murugan Subaramanian
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati − 517507, India
| | - Siba P. Midya
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati − 517507, India
| | - Palmurukan M. Ramar
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati − 517507, India
| | - Ekambaram Balaraman
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati − 517507, India
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31
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Miller DC, Ganley JM, Musacchio AJ, Sherwood TC, Ewing WR, Knowles RR. Anti-Markovnikov Hydroamination of Unactivated Alkenes with Primary Alkyl Amines. J Am Chem Soc 2019; 141:16590-16594. [PMID: 31603324 DOI: 10.1021/jacs.9b08746] [Citation(s) in RCA: 73] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report here a photocatalytic method for the intermolecular anti-Markovnikov hydroamination of unactivated olefins with primary alkyl amines to selectively furnish secondary amine products. These reactions proceed through aminium radical cation (ARC) intermediates and occur at room temperature under visible light irradiation in the presence of an iridium photocatalyst and an aryl thiol hydrogen atom donor. Despite the presence of excess olefin, high selectivities are observed for secondary over tertiary amine products, even though the secondary amines are established substrates for ARC-based olefin amination under similar conditions.
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Affiliation(s)
- David C Miller
- Department of Chemistry , Princeton University , Princeton , New Jersey 08544 , United States
| | - Jacob M Ganley
- Department of Chemistry , Princeton University , Princeton , New Jersey 08544 , United States
| | - Andrew J Musacchio
- Department of Chemistry , Princeton University , Princeton , New Jersey 08544 , United States
| | - Trevor C Sherwood
- Discovery Chemistry , Bristol-Myers Squibb , Lawrenceville , New Jersey 08543 , United States
| | - William R Ewing
- Discovery Chemistry , Bristol-Myers Squibb , Lawrenceville , New Jersey 08543 , United States
| | - Robert R Knowles
- Department of Chemistry , Princeton University , Princeton , New Jersey 08544 , United States
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32
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Li E, Lin Y, Wu X, Mao X, Kang H, Wen Y, Bai Y, Wang X, Lv X. Regioselective single-step synthesis of 2-aminoimidazole derivatives. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.151122] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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33
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Fiore AM, Romanazzi G, Dell’Anna MM, Latronico M, Leonelli C, Mali M, Rizzuti A, Mastrorilli P. Mild and efficient synthesis of secondary aromatic amines by one-pot stepwise reductive amination of arylaldehydes with nitroarenes promoted by reusable nickel nanoparticles. MOLECULAR CATALYSIS 2019. [DOI: 10.1016/j.mcat.2019.110507] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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34
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Fu LY, Ying J, Qi X, Peng JB, Wu XF. Palladium-Catalyzed Carbonylative Synthesis of Isoindolinones from Benzylamines with TFBen as the CO Source. J Org Chem 2019; 84:1421-1429. [DOI: 10.1021/acs.joc.8b02862] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Lu-Yang Fu
- Department of Chemistry, Zhejiang Sci-Tech University, Xiasha Campus, Hangzhou 310018, People’s Republic of China
| | - Jun Ying
- Department of Chemistry, Zhejiang Sci-Tech University, Xiasha Campus, Hangzhou 310018, People’s Republic of China
| | - Xinxin Qi
- Department of Chemistry, Zhejiang Sci-Tech University, Xiasha Campus, Hangzhou 310018, People’s Republic of China
| | - Jin-Bao Peng
- Department of Chemistry, Zhejiang Sci-Tech University, Xiasha Campus, Hangzhou 310018, People’s Republic of China
| | - Xiao-Feng Wu
- Department of Chemistry, Zhejiang Sci-Tech University, Xiasha Campus, Hangzhou 310018, People’s Republic of China
- Leibniz-Institut für Katalyse e. V. an der Universität Rostock, Albert-Einstein-Straβe 29a, 18059 Rostock, Germany
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35
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Orrego-Hernández J, Lizarazo C, Cobo J, Portilla J. Pyrazolo-fused 4-azafluorenones as key reagents for the synthesis of fluorescent dicyanovinylidene-substituted derivatives. RSC Adv 2019; 9:27318-27323. [PMID: 35529179 PMCID: PMC9070601 DOI: 10.1039/c9ra04682h] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2019] [Accepted: 08/24/2019] [Indexed: 12/21/2022] Open
Abstract
A green method for the three-component synthesis of an indeno[1,2-b]pyrazolo[4,3-e]pyridines library under microwave irradiation and their use in the preparation of novel fluorescent dicyanovinylidene-substituted derivatives is provided.
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Affiliation(s)
- Jessica Orrego-Hernández
- Bioorganic Compounds Research Group
- Department of Chemistry
- Universidad de los Andes
- Bogotá 111711
- Colombia
| | - Carolina Lizarazo
- Bioorganic Compounds Research Group
- Department of Chemistry
- Universidad de los Andes
- Bogotá 111711
- Colombia
| | - Justo Cobo
- Departamento de Química Orgánica e Inorgánica
- Universidad de Jaén
- 23071 Jaén
- Spain
| | - Jaime Portilla
- Bioorganic Compounds Research Group
- Department of Chemistry
- Universidad de los Andes
- Bogotá 111711
- Colombia
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36
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Castillo JC, Tigreros A, Portilla J. 3-Formylpyrazolo[1,5- a]pyrimidines as Key Intermediates for the Preparation of Functional Fluorophores. J Org Chem 2018; 83:10887-10897. [PMID: 30051714 DOI: 10.1021/acs.joc.8b01571] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A one-pot route for the regioselective synthesis of 3-formylpyrazolo[1,5- a]pyrimidines 4a-k in good yields through a microwave-assisted process is provided. The synthesis proceeds via a cyclocondensation reaction between β-enaminones 1 with NH-3-aminopyrazoles 2, followed by formylation with an iminium salt moiety (Vilsmeyer-Haack reagent). These N-heteroaryl aldehydes 4 were successfully used as strategic intermediates for the preparation of novel functional fluorophores with yields up to 98%. The structures of the products obtained and regioselectivity of the reactions were determined on the basis of NMR measurements and X-ray diffraction analysis. Since pyrazolo[1,5- a]pyrimidines (PPs) 3 have shown an important fluorescence, photophysical properties of four 2-methylderivatives substituted at position 7 with different acceptor (A) or donor (D) groups were investigated. The compounds evaluated exhibited large Stokes shift in different solvents, but only the substituted p-methoxyphenyl (4-An) showed a strong fluorescence intensity with quantum yields up to 44% due to its greater ICT. Therefore, hybrid systems based on pyrazolo[1,5- a]pyrimidines could be used as fluorescent probes to detect biologically or environmentally relevant species.
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Affiliation(s)
- Juan-Carlos Castillo
- Bioorganic Compounds Research Group, Department of Chemistry , Universidad de los Andes , Carrera 1 No. 18A-10 , Bogotá , Colombia.,Escuela de Ciencias Químicas, Facultad de Ciencias , Universidad Pedagógica y Tecnológica de Colombia UPTC , Avenida Central del Norte , Tunja , Colombia
| | - Alexis Tigreros
- Bioorganic Compounds Research Group, Department of Chemistry , Universidad de los Andes , Carrera 1 No. 18A-10 , Bogotá , Colombia
| | - Jaime Portilla
- Bioorganic Compounds Research Group, Department of Chemistry , Universidad de los Andes , Carrera 1 No. 18A-10 , Bogotá , Colombia
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37
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Varela MT, Romaneli MM, Lima ML, Borborema SET, Tempone AG, Fernandes JPS. Antiparasitic activity of new gibbilimbol analogues and SAR analysis through efficiency and statistical methods. Eur J Pharm Sci 2018; 122:31-41. [PMID: 29935351 DOI: 10.1016/j.ejps.2018.06.023] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 06/12/2018] [Accepted: 06/19/2018] [Indexed: 01/22/2023]
Abstract
Chagas' disease and leishmaniasis are parasitic infections enrolled among the neglected tropical diseases, which urge for new treatments. In the search for new chemical entities as prototypes, gibbilimbols A/B have shown antiparasitic activity against Trypanosoma cruzi and Leishmania infantum, and then a set of analogues (LINS03 series) of this natural product were synthesized and evaluated in vitro against the parasites. In the present paper we reported five new compounds with activity against these protozoan parasites, and quite low cytotoxicity. Moreover, the interference of plasma membrane permeability of these analogues were also evaluated. We found that [(4-methoxyphenyl)methyl]octylamine (4) was noteworthy due to its high activity against the amastigote form of both parasites (IC50 1.3-5.8 μM) and good selectivity index. In order to unveil the SAR for this chemotype, we also presented a group efficiency analysis and PCA and HCA study, which indicated that the methoxyl provides good activity with lower cytotoxicity to mammalian cells. The results from SAR analyses suggest different mechanisms of action between the neutral and basic compounds. In summary, the analogues represent important activity against these parasites and must be prototypes for further exploitation.
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Affiliation(s)
- Marina T Varela
- Departamento de Ciências Farmacêuticas, Universidade Federal de São Paulo, Rua São Nicolau 210, 09913-030 Diadema, SP, Brazil
| | - Maiara M Romaneli
- Centro de Parasitologia e Micologia, Instituto Adolfo Lutz, Av. Dr. Arnaldo 355, 01246-000 São Paulo, SP, Brazil
| | - Marta L Lima
- Centro de Parasitologia e Micologia, Instituto Adolfo Lutz, Av. Dr. Arnaldo 355, 01246-000 São Paulo, SP, Brazil; Instituto de Medicina Tropical de São Paulo, Universidade de São Paulo, Av. Dr. Enéas Carvalho de Aguiar 470, 05403-000 São Paulo, SP, Brazil
| | - Samanta E T Borborema
- Centro de Parasitologia e Micologia, Instituto Adolfo Lutz, Av. Dr. Arnaldo 355, 01246-000 São Paulo, SP, Brazil
| | - Andre G Tempone
- Centro de Parasitologia e Micologia, Instituto Adolfo Lutz, Av. Dr. Arnaldo 355, 01246-000 São Paulo, SP, Brazil
| | - João P S Fernandes
- Departamento de Ciências Farmacêuticas, Universidade Federal de São Paulo, Rua São Nicolau 210, 09913-030 Diadema, SP, Brazil.
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38
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Midya SP, Pitchaimani J, Landge VG, Madhu V, Balaraman E. Direct access toN-alkylated amines and iminesviaacceptorless dehydrogenative coupling catalyzed by a cobalt(ii)-NNN pincer complex. Catal Sci Technol 2018. [DOI: 10.1039/c8cy00859k] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A Co(ii)-NNN pincer complex catalyzed directN-alkylation of anilines with alcoholsviahydrogen auto-transfer and selective acceptorless dehydrogenative coupling of benzylamines with alcohols affording imines with the liberation of molecular hydrogen and water is reported.
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Affiliation(s)
- Siba P. Midya
- Organic Chemistry Division
- CSIR-National Chemical Laboratory (CSIR-NCL)
- Pune – 411008
- India
| | - Jayaraman Pitchaimani
- Department of Chemistry
- Karunya Institute of Technology and Sciences (Deemed to be University)
- Coimbatore – 641114
- India
| | - Vinod G. Landge
- Organic Chemistry Division
- CSIR-National Chemical Laboratory (CSIR-NCL)
- Pune – 411008
- India
| | - Vedichi Madhu
- Department of Chemistry
- Karunya Institute of Technology and Sciences (Deemed to be University)
- Coimbatore – 641114
- India
| | - Ekambaram Balaraman
- Organic Chemistry Division
- CSIR-National Chemical Laboratory (CSIR-NCL)
- Pune – 411008
- India
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39
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Jiménez MV, Fernández-Tornos J, González-Lainez M, Sánchez-Page B, Modrego FJ, Oro LA, Pérez-Torrente JJ. Mechanistic studies on the N-alkylation of amines with alcohols catalysed by iridium(i) complexes with functionalised N-heterocyclic carbene ligands. Catal Sci Technol 2018. [DOI: 10.1039/c7cy02488f] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Experimental and theoretical studies give support for an iridium-catalyzed C–N bond formation.
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Affiliation(s)
- M. Victoria Jiménez
- Department of Inorganic Chemistry
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH-CSIC)
- University of Zaragoza
- Zaragoza
- Spain
| | - Javier Fernández-Tornos
- Department of Inorganic Chemistry
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH-CSIC)
- University of Zaragoza
- Zaragoza
- Spain
| | - Miguel González-Lainez
- Department of Inorganic Chemistry
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH-CSIC)
- University of Zaragoza
- Zaragoza
- Spain
| | - Beatriz Sánchez-Page
- Department of Inorganic Chemistry
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH-CSIC)
- University of Zaragoza
- Zaragoza
- Spain
| | - F. Javier Modrego
- Department of Inorganic Chemistry
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH-CSIC)
- University of Zaragoza
- Zaragoza
- Spain
| | - Luis A. Oro
- Department of Inorganic Chemistry
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH-CSIC)
- University of Zaragoza
- Zaragoza
- Spain
| | - Jesús J. Pérez-Torrente
- Department of Inorganic Chemistry
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH-CSIC)
- University of Zaragoza
- Zaragoza
- Spain
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40
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Peng Q, Hu J, Huo J, Yuan H, Xu L, Pan X. Cp*Rh(iii) catalyzed ortho-halogenation of N-nitrosoanilines by solvent-controlled regioselective C–H functionalization. Org Biomol Chem 2018; 16:4471-4481. [PMID: 29855022 DOI: 10.1039/c8ob00601f] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A highly efficient rhodium-catalyzed, solvent-controlled regioselective C–H halogenation of anilines by using N-nitroso as a suitable and removable directing group was achieved under mild reaction conditions.
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Affiliation(s)
- Qiujun Peng
- School of Perfume and Aroma Technology
- Shanghai Institute of Technology
- Shanghai
- China
| | - Jian Hu
- School of Perfume and Aroma Technology
- Shanghai Institute of Technology
- Shanghai
- China
| | - Jiyou Huo
- School of Perfume and Aroma Technology
- Shanghai Institute of Technology
- Shanghai
- China
| | - Hongshun Yuan
- School of Perfume and Aroma Technology
- Shanghai Institute of Technology
- Shanghai
- China
| | - Lanting Xu
- Shanghai Research Institute of Fragrance and Flavor Industry
- Shanghai 200232
- China
| | - Xianhua Pan
- Shanghai Research Institute of Fragrance and Flavor Industry
- Shanghai 200232
- China
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41
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Charris-Molina A, Castillo JC, Macías M, Portilla J. One-Step Synthesis of Fully Functionalized Pyrazolo[3,4-b]pyridines via Isobenzofuranone Ring Opening. J Org Chem 2017; 82:12674-12681. [PMID: 29125772 DOI: 10.1021/acs.joc.7b02471] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A novel series of fully substituted pyrazolo[3,4-b]pyridines 4 has been prepared in a regioselective manner by the microwave-assisted reaction between N-substituted 5-aminopyrazoles 1 and 3-(3-oxo-2-benzofuran-1(3H)-ylidene)pentane-2,4-dione (2). This is the second reported example of a cyclocondensation reaction using substrate 2 as a 1,3-bis-electrophilic reagent. Remarkably, this synthesis offers functionalized products with acetyl and carboxyl groups in one step, in good yields, and with short reaction times. Additionally, the cyclization intermediate 3 was isolated, allowing us to postulate a mechanism for this reaction, which is initiated via isobenzofuranone ring opening of 2 in a Michael-type reaction. The structures of the products and regioselectivity of the reactions were determined on the basis of NMR measurements and X-ray diffraction. For this new reaction using substrate 2, the optimal reaction conditions and its scope were investigated.
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Affiliation(s)
- Andrés Charris-Molina
- Bioorganic Compounds Research Group, Department of Chemistry, Universidad de los Andes , Carrera 1 No. 18A-10, Bogotá 111711, Colombia
| | - Juan-Carlos Castillo
- Bioorganic Compounds Research Group, Department of Chemistry, Universidad de los Andes , Carrera 1 No. 18A-10, Bogotá 111711, Colombia
| | - Mario Macías
- Bioorganic Compounds Research Group, Department of Chemistry, Universidad de los Andes , Carrera 1 No. 18A-10, Bogotá 111711, Colombia
| | - Jaime Portilla
- Bioorganic Compounds Research Group, Department of Chemistry, Universidad de los Andes , Carrera 1 No. 18A-10, Bogotá 111711, Colombia
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42
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An improved and one-pot procedure to the synthesis of symmetric amines by domino reactions of 5-methyl-1,3,4-thiadiazole-2-amine, a new nitrogen atom donor, and alkyl halides. MONATSHEFTE FUR CHEMIE 2017. [DOI: 10.1007/s00706-017-2042-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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43
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Zhou P, Zhang Z. One-pot Reductive Amination of carbonyl Compounds with Nitro Compounds by Transfer Hydrogenation over Co-N x as catalyst. CHEMSUSCHEM 2017; 10:1892-1897. [PMID: 28345301 DOI: 10.1002/cssc.201700348] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Revised: 03/23/2017] [Indexed: 06/06/2023]
Abstract
A new method was developed for the synthesis of secondary amines through the one-pot reductive amination of carbonyl compounds with nitro compounds using formic acid as the hydrogen donor over a heterogeneous non-noble-metal catalyst (Co-Nx /C-800-AT, generated by the pyrolysis of the cobalt phthalocyanine/silica composite at 800°C under a N2 atmosphere and subsequent etching by HF). Both nitrogen and cobalt were of considerable importance in the transfer hydrogenation reactions with formic acid.
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Affiliation(s)
- Peng Zhou
- Key Laboratory of Catalysis and Materials Sciences of the Ministry of Education, South-Central University for Nationalities, Wuhan, 430074, P. R. China
| | - Zehui Zhang
- Key Laboratory of Catalysis and Materials Sciences of the Ministry of Education, South-Central University for Nationalities, Wuhan, 430074, P. R. China
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44
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Ding X, Huang M, Yi Z, Du D, Zhu X, Wan Y. Room-Temperature CuI-Catalyzed Amination of Aryl Iodides and Aryl Bromides. J Org Chem 2017; 82:5416-5423. [PMID: 28436219 DOI: 10.1021/acs.joc.7b00290] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A general and effective CuI/N',N'-diaryl-1H-pyrrole-2-carbohydrazide catalyst system was developed for the amination of aryl iodides and bromides at room temperature with good chemoselectivity between -OH and -NH2 groups. Only 5 mol % of CuI and ligands was needed in this protocol to effect the amination of various aryl bromides and aryl iodides with a wide range of aliphatic and aryl amines (1.3 equiv).
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Affiliation(s)
- Xiaomei Ding
- School of Chemical Engineering and Technology and ‡School of Chemistry, Sun Yat-Sen University , Guangzhou 510275, P. R. China
| | - Manna Huang
- School of Chemical Engineering and Technology and ‡School of Chemistry, Sun Yat-Sen University , Guangzhou 510275, P. R. China
| | - Zhou Yi
- School of Chemical Engineering and Technology and ‡School of Chemistry, Sun Yat-Sen University , Guangzhou 510275, P. R. China
| | - Dongchen Du
- School of Chemical Engineering and Technology and ‡School of Chemistry, Sun Yat-Sen University , Guangzhou 510275, P. R. China
| | - Xinhai Zhu
- School of Chemical Engineering and Technology and ‡School of Chemistry, Sun Yat-Sen University , Guangzhou 510275, P. R. China
| | - Yiqian Wan
- School of Chemical Engineering and Technology and ‡School of Chemistry, Sun Yat-Sen University , Guangzhou 510275, P. R. China
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45
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Castillo JC, Rosero HA, Portilla J. Simple access toward 3-halo- and 3-nitro-pyrazolo[1,5-a]pyrimidines through a one-pot sequence. RSC Adv 2017. [DOI: 10.1039/c7ra04336h] [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] Open
Abstract
Herein, a regioselective, time-efficient and one-pot route for the synthesis of diversely substituted 3-halo- and 3-nitropyrazolo[1,5-a]pyrimidines in good to excellent yields through a microwave-assisted process is provided.
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Affiliation(s)
- Juan-Carlos Castillo
- Bioorganic Compounds Research Group
- Department of Chemistry
- Universidad de los Andes
- Bogotá 111711
- Colombia
| | - Hernán-Alejandro Rosero
- Bioorganic Compounds Research Group
- Department of Chemistry
- Universidad de los Andes
- Bogotá 111711
- Colombia
| | - Jaime Portilla
- Bioorganic Compounds Research Group
- Department of Chemistry
- Universidad de los Andes
- Bogotá 111711
- Colombia
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46
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Jiang L, Zhou P, Zhang Z, Chi Q, Jin S. Environmentally friendly synthesis of secondary amines via one-pot reductive amination over a heterogeneous Co–Nx catalyst. NEW J CHEM 2017. [DOI: 10.1039/c7nj02727c] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The application of earth-abundant transition metal catalysts in the mild and selective synthesis of secondary amines via the reductive amination method is very challenging.
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Affiliation(s)
- Liang Jiang
- Key Laboratory of Catalysis and Materials Sciences of the Ministry of Education
- South-Central University for Nationalities
- Wuhan
- P. R. China
| | - Peng Zhou
- Key Laboratory of Catalysis and Materials Sciences of the Ministry of Education
- South-Central University for Nationalities
- Wuhan
- P. R. China
| | - Zehui Zhang
- Key Laboratory of Catalysis and Materials Sciences of the Ministry of Education
- South-Central University for Nationalities
- Wuhan
- P. R. China
| | - Quan Chi
- Key Laboratory of Catalysis and Materials Sciences of the Ministry of Education
- South-Central University for Nationalities
- Wuhan
- P. R. China
| | - Shiwei Jin
- Key Laboratory of Catalysis and Materials Sciences of the Ministry of Education
- South-Central University for Nationalities
- Wuhan
- P. R. China
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47
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Castillo JC, Estupiñan D, Nogueras M, Cobo J, Portilla J. 6-(Aryldiazenyl)pyrazolo[1,5-a]pyrimidines as Strategic Intermediates for the Synthesis of Pyrazolo[5,1-b]purines. J Org Chem 2016; 81:12364-12373. [PMID: 27978735 DOI: 10.1021/acs.joc.6b02431] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A microwave-assisted approach for the regioselective synthesis of functionalized 6-(aryldiazenyl)pyrazolo[1,5-a]pyrimidin-7-amines from the cyclization of 3-oxo-2-(2-arylhydrazinylidene)butanenitriles with 5-amino-1H-pyrazoles under solvent-free conditions has been developed. This methodology was distinguished by its broad substrate scope, operational simplicity, high atom economy, and high-yielding without requiring chromatographic purification. In addition, an efficient and versatile palladium-catalyzed reductive azo cleavage is disclosed for the synthesis of diverse heteroaromatic 1,2-diamines, a valuable synthetic building block to develop new fused heteroaromatic systems. As synthetic example, several substituted pyrazolo[5,1-b]purines were synthesized in yields up to 96% by using microwave irradiation in the cyclocondensation of these 1,2-diamines with orthoesters.
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Affiliation(s)
- Juan-Carlos Castillo
- Bioorganic Compounds Research Group, Department of Chemistry, Universidad de los Andes , Carrera 1 No. 18A-10, Bogotá 111711, Colombia
| | - Diego Estupiñan
- Bioorganic Compounds Research Group, Department of Chemistry, Universidad de los Andes , Carrera 1 No. 18A-10, Bogotá 111711, Colombia
| | - Manuel Nogueras
- Departamento de Química Inorgánica y Orgánica, Universidad de Jaén , Jaén 23071, Spain
| | - Justo Cobo
- Departamento de Química Inorgánica y Orgánica, Universidad de Jaén , Jaén 23071, Spain
| | - Jaime Portilla
- Bioorganic Compounds Research Group, Department of Chemistry, Universidad de los Andes , Carrera 1 No. 18A-10, Bogotá 111711, Colombia
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