1
|
Yu C, Chen Z, Zhang L, Zhao D, Hu G. Palladium-Catalyzed C6-Selective C–H Acylation of 2-Pyridones. Synlett 2021. [DOI: 10.1055/s-0040-1706546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
AbstractA versatile palladium-catalyzed C6-selective C–H acylation of 2-pyridones with commercially available aldehydes using TBHP as an oxidant has been developed. This protocol tolerated diverse functional groups and has excellent level of site selectivity. Moreover, it does not require silver salts as additives.
Collapse
Affiliation(s)
- Chuanming Yu
- College of Pharmaceutical Sciences, Zhejiang University of Technology
| | - Zhiwei Chen
- College of Pharmaceutical Sciences, Zhejiang University of Technology
| | - Lei Zhang
- College of Pharmaceutical Sciences, Zhejiang University of Technology
| | - Danxia Zhao
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology
| | - Gangao Hu
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology
| |
Collapse
|
2
|
Xu F, Zhu WJ, Wang J, Ma Q, Shen LJ. Rhodium-catalyzed synthesis of substituted isoquinolones via a selective decarbonylation/alkyne insertion cascade of phthalimides. Org Biomol Chem 2020; 18:8219-8223. [PMID: 33043915 DOI: 10.1039/d0ob01793k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A rhodium-catalyzed decarbonylation/alkyne insertion cascade of phthalimides has been established. The reaction can be carried out in an operationally simple manner and provides expedient access to a series of isoquinolones in moderate to good yields. This reaction proceeded through a sequential decarbonylation/alkyne insertion/intramolecular annulation procedure and featured good functional group tolerance, ample substrate scope, and the construction of C-C and C-N bonds in one pot.
Collapse
Affiliation(s)
- Fen Xu
- Department of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, P. R. China
| | - Wen-Jing Zhu
- Department of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, P. R. China
| | - Juan Wang
- Henan Ecological and Environmental Monitoring Center, Zhengzhou 450002, P. R. China
| | - Qi Ma
- Department of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, P. R. China
| | - Li-Jing Shen
- Department of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, P. R. China
| |
Collapse
|
3
|
Tonin MD, Garden SJ, Jotani MM, Wardell JL, Tiekink ER. On the influence of small chemical changes upon the supramolecular association in substituted 2-(phenoxy)-1,4-naphthoquinones. Z KRIST-CRYST MATER 2018. [DOI: 10.1515/zkri-2018-2129] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Abstract
X-ray crystallography reveals the common feature of the title compounds is a 1,4-naphthoquinone ring system with a substituted phenoxy residue adjacent to an oxo-group to give 1 (H), 2 (3-Br), 3 (3-CF3), 4 (4-CN) and 5 (4-NO2). To a first approximation the fused ring system along with the two oxo substituents is planar with the major difference between the molecules relating to the relative orientations of the pendant phenoxy residues: dihedral angles range from 56.56(4)° (3) to 87.52(10)° (2). The presence of intermolecular C–H···O interactions is the common feature of the supramolecular association in the crystals of 1–5. In each of 1 and 5, these extend in three-dimensions but, only to supramolecular dimers in 4, chains in 2 and layers in 3. Each crystal also features C=O···π interactions, pointing to the importance of these points of contact in this series di-oxocompounds. In 2, these, along with C–Br···π interactions lead to a three-dimensional architecture. For 3, the C=O···π and π···π interactions occur within the layers which stack without directional interactions between them. In 4, C–H···O and C=O···π interactions combine to give a supramolecular layer, which also stack without directional interactions in the inter-layer region. Further analysis of the molecular packing was conducted by a Hirshfeld surface analysis (HSA). This points to the significant role of H···H, C···H/H···C and O···H/H···O contacts in the packing of 1. Notably different roles for these contacts are found in the other crystals correlating with the participation of the respective substituents in the molecular packing. The HSA suggests the association between layers in 3 (weak F···F and H···F interactions) and 4 (weak H···N interactions) is contributed by the phenoxy-substituents.
Collapse
Affiliation(s)
- Marlon D.L. Tonin
- Instituto de Química, Universidade Federal do Rio de Janeiro, Centro de Tecnologia, Bloco A, Cidade Universitária , 21941-909 Rio de Janeiro-RJ , Brazil
| | - Simon J. Garden
- Instituto de Química, Universidade Federal do Rio de Janeiro, Centro de Tecnologia, Bloco A, Cidade Universitária , 21941-909 Rio de Janeiro-RJ , Brazil
| | - Mukesh M. Jotani
- Department of Physics , Bhavan’s Sheth R. A. College of Science , Ahmedabad, 380001 Gujarat , India
| | - James L. Wardell
- Department of Chemistry , University of Aberdeen , Old Aberdeen AB24 3UE , Scotland
| | - Edward R.T. Tiekink
- Research Centre for Crystalline Materials, School of Science and Technology , Sunway University , 47500 Bandar Sunway, Selangor Darul Ehsan , Malaysia
| |
Collapse
|
4
|
Possato B, Carneiro ZA, de Albuquerque S, Nikolaou S. New uses for old complexes: The very first report on the trypanocidal activity of symmetric trinuclear ruthenium complexes. J Inorg Biochem 2017; 176:156-158. [PMID: 28915432 DOI: 10.1016/j.jinorgbio.2017.08.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2017] [Revised: 07/23/2017] [Accepted: 08/25/2017] [Indexed: 12/17/2022]
Abstract
This work reports on the trypanocidal activity of a series of symmetric triruthenium complexes combined with azanaphthalene ligands of general formula [Ru3O(CH3COO)6(L)3]PF6 (L=(1) quinazoline (qui), (2) 5-nitroisoquinoline (5-nitroiq), (3) 5-bromoisoquinoline (5-briq), (4) isoquinoline (iq), (5) 5-aminoisoquinoline (5-amiq), and (6) 5,6,7,8-tetrahydroisoquinoline (thiq)). All complexes within the series presented in vitro trypanocidal activity against both the trypomastigote and amastigote forms of T. cruzi. The IC50 values obtained for complexes 1-6 ranged from 1.39 to 165.9μM for the trypomastigote form and from 1.06 to 53.16μM for the amastigote form. These values were lower than the values observed for the metallic core [Ru3O(CH3COO)6(CH3OH)3]+ itself and for the free ligands in all cases. Remarkably, complex 6 displayed lower IC50 values than the reference drug (benznidazole) for the acute (trypomastigote form) and chronic (amastigote form) phases of Chagas disease. These findings, combined with the low toxicity against healthy cells (LLK-MK2 strain) and a high SI value (Selectivity Index >10) make complex 6 an excellent candidate for in vivo tests.
Collapse
Affiliation(s)
- Bruna Possato
- Departamento de Química - Faculdade de Filosofia Ciências e Letras de Ribeirão Preto da Universidade de São Paulo, Av. Bandeirantes, 3900, CEP 14040-901, Monte Alegre, Ribeirão Preto, SP, Brazil
| | - Zumira Aparecida Carneiro
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto da Universidade de São Paulo, Av. do Café s/n, CEP: 14040-903, Monte Alegre, Ribeirão Preto, SP, Brazil
| | - Sérgio de Albuquerque
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto da Universidade de São Paulo, Av. do Café s/n, CEP: 14040-903, Monte Alegre, Ribeirão Preto, SP, Brazil
| | - Sofia Nikolaou
- Departamento de Química - Faculdade de Filosofia Ciências e Letras de Ribeirão Preto da Universidade de São Paulo, Av. Bandeirantes, 3900, CEP 14040-901, Monte Alegre, Ribeirão Preto, SP, Brazil.
| |
Collapse
|
5
|
Rodríguez-Becerra J, Cáceres-Jensen L, Hernández-Ramos J, Barrientos L. Identification of potential trypanothione reductase inhibitors among commercially available
$$\upbeta $$
β
-carboline derivatives using chemical space, lead-like and drug-like filters, pharmacophore models and molecular docking. Mol Divers 2017; 21:697-711. [DOI: 10.1007/s11030-017-9747-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Accepted: 04/16/2017] [Indexed: 10/19/2022]
|
6
|
Pedroni J, Saget T, Donets PA, Cramer N. Enantioselective palladium(0)-catalyzed intramolecular cyclopropane functionalization: access to dihydroquinolones, dihydroisoquinolones and the BMS-791325 ring system. Chem Sci 2015; 6:5164-5171. [PMID: 29142735 PMCID: PMC5667185 DOI: 10.1039/c5sc01909e] [Citation(s) in RCA: 87] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Accepted: 06/17/2015] [Indexed: 01/20/2023] Open
Abstract
Taddol-based phosphoramidite ligands enable enantioselective palladium(0)-catalyzed C-H arylation of cyclopropanes. The cyclized products are obtained in high yields and enantioselectivities. The reported method provides efficient access to a broad range of synthetically attractive cyclopropyl containing dihydroquinolones and dihydroisoquinolones as well as allows for an efficient enantioselective construction of the 7-membered ring of the cyclopropyl indolobenzazepine core of BMS-791325.
Collapse
Affiliation(s)
- J Pedroni
- Laboratory of Asymmetric Catalysis and Synthesis , Institute of Chemical Sciences and Engineering , Ecole Polytechnique Fédérale de Lausanne , EPFL SB ISIC LCSA, BCH 4305 , CH-1015 Lausanne , Switzerland .
| | - T Saget
- Laboratory of Asymmetric Catalysis and Synthesis , Institute of Chemical Sciences and Engineering , Ecole Polytechnique Fédérale de Lausanne , EPFL SB ISIC LCSA, BCH 4305 , CH-1015 Lausanne , Switzerland .
| | - P A Donets
- Laboratory of Asymmetric Catalysis and Synthesis , Institute of Chemical Sciences and Engineering , Ecole Polytechnique Fédérale de Lausanne , EPFL SB ISIC LCSA, BCH 4305 , CH-1015 Lausanne , Switzerland .
| | - N Cramer
- Laboratory of Asymmetric Catalysis and Synthesis , Institute of Chemical Sciences and Engineering , Ecole Polytechnique Fédérale de Lausanne , EPFL SB ISIC LCSA, BCH 4305 , CH-1015 Lausanne , Switzerland .
| |
Collapse
|
7
|
Bains D, Kumar Y, Singh P, Bhargava G. [2 + 2] Cycloaddition Reactions of Butadienyl Ketene with 1,4-Diazabuta-1,3-dienes: Synthesis of Functionalized Butadienyl-4-iminomethyl-azetidin-2-ones and Butenylidene-butadienyl-[2,2′-biazetidine]-4,4′-diones. J Heterocycl Chem 2015. [DOI: 10.1002/jhet.2465] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Deepak Bains
- Department of Applied Sciences; Punjab Technical University; Kapurthala Punjab 144603 India
| | - Yogesh Kumar
- Department of Applied Sciences; Punjab Technical University; Kapurthala Punjab 144603 India
| | - Prabhpreet Singh
- Department of Chemistry; Guru Nanak Dev University; Amritsar Punjab 143005 India
| | - Gaurav Bhargava
- Department of Applied Sciences; Punjab Technical University; Kapurthala Punjab 144603 India
| |
Collapse
|
8
|
Zhang Y, Wang Q, Yu H, Huang Y. Directed arene/alkyne annulation reactions via aerobic copper catalysis. Org Biomol Chem 2014; 12:8844-50. [DOI: 10.1039/c4ob01312c] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
9
|
Mehra V, Kumar V. Facile, diastereoselective synthesis of functionally enriched hexahydroisoquinolines, hexahydroisoquinolones and hexahydroisochromones via inter-/intramolecular amidolysis of C-3 functionalized 2-azetidinones. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.03.044] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
|
10
|
Zhou L, Stewart G, Rideau E, Westwood NJ, Smith TK. A class of 5-nitro-2-furancarboxylamides with potent trypanocidal activity against Trypanosoma brucei in vitro. J Med Chem 2013; 56:796-806. [PMID: 23281892 PMCID: PMC3579312 DOI: 10.1021/jm301215e] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Recently, the World Health Organization approved the nifurtimox-eflornithine combination therapy for the treatment of human African trypanosomiasis, renewing interest in nitroheterocycle therapies for this and associated diseases. In this study, we have synthesized a series of novel 5-nitro-2-furancarboxylamides that show potent trypanocidal activity, ∼1000-fold more potent than nifurtimox against in vitro Trypanosoma brucei with very low cytotoxicity against human HeLa cells. More importantly, the most potent analogue showed very limited cross-resistance to nifurtimox-resistant cells and vice versa. This implies that our novel, relatively easy to synthesize and therefore cheap, 5-nitro-2-furancarboxylamides are targeting a different, but still essential, biochemical process to those targeted by nifurtimox or its metabolites in the parasites. The significant increase in potency (smaller dose probably required) has the potential for greatly reducing unwanted side effects and also reducing the likelihood of drug resistance. Collectively, these findings have important implications for the future therapeutic treatment of African sleeping sickness.
Collapse
Affiliation(s)
- Linna Zhou
- School of Chemistry and EaStCHEM, The North Haugh, The University of St. Andrews, Fife KY16 9ST, Scotland, UK
| | | | | | | | | |
Collapse
|