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Williams S, Qi L, Cox RJ, Kumar P, Xiao J. Hydrogenation of functionalised pyridines with a rhodium oxide catalyst under mild conditions. Org Biomol Chem 2024; 22:1010-1017. [PMID: 38186335 DOI: 10.1039/d3ob01860a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2024]
Abstract
Piperidines are one of the most widely used building blocks in the synthesis of pharmaceutical and agrochemical compounds. The hydrogenation of pyridines is a convenient method to synthesise such compounds as it only requires reactant, catalyst, and a hydrogen source. However, this reaction still remains difficult for the reduction of functionalised and multi-substituted pyridines. Here we report the use of a stable, commercially available rhodium compound, Rh2O3, for the reduction of various unprotected pyridines. The reaction only requires mild conditions, and the substrate scope is broad, making it practically useful.
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Affiliation(s)
- Sydney Williams
- Department of Chemistry, University of Liverpool, Crown Street, L69 7ZD, Liverpool, UK.
| | - Leiming Qi
- Department of Chemistry, University of Liverpool, Crown Street, L69 7ZD, Liverpool, UK.
| | - Robert J Cox
- Chemical Development, AstraZeneca, Silk Road Business Park, SK10 2NA, Macclesfield, UK
| | - Prashant Kumar
- Department of Chemistry, University of Liverpool, Crown Street, L69 7ZD, Liverpool, UK.
| | - Jianliang Xiao
- Department of Chemistry, University of Liverpool, Crown Street, L69 7ZD, Liverpool, UK.
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Molecular structure analysis of 4-fluoro phenyl(4-methyl piperidin-1-yl) methanone and a comparative study of its optical, antimicrobial and antioxidant activities with 4-chloro phenyl (4-methyl piperidin-1-yl) methanone. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.134080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Popova EA, Trifonov RE, Ostrovskii VA. Tetrazoles for biomedicine. RUSSIAN CHEMICAL REVIEWS 2019. [DOI: 10.1070/rcr4864] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Sivasankerreddy L, Nagamani B, Rajkumar T, Babu MS, Subbaiah NY, Harika MS, Nageswarao R. Novel Diazenyl Containing Phenyl Styryl Ketone Derivatives as Antimicrobial Agents. ANTI-INFECTIVE AGENTS 2019; 17:28-38. [PMID: 31328083 PMCID: PMC6596389 DOI: 10.2174/2211352516666180927111546] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/22/2018] [Revised: 09/08/2018] [Accepted: 09/24/2018] [Indexed: 11/22/2022]
Abstract
Background: Antibiotics play an important role in the treatment of infections to the hu-mans and at the same time, irrational, frequent prescription of higher antibiotics, change in gene com-position of microorganisms are all the reasons behind the development and introduction of new anti-biotics against different microorganisms. Objective: In this project, an attempt has been made to synthesize some derivatives of diazenyl con-taining phenyl styryl ketones and also their in vitro screening was conducted against Mycobacterium tuberculosis, Escherichia coli, Klebsiella pneumonia, Bacillus subtilis, Staphylococcus aureus, As-pergillus niger and Candida albicans. Methods: Ten molecules were synthesized which are diazenyl containing chalcones. 4-aminoacetophenone was diazotised and piperidine was coupled with the formed diazonium chloride. Further, the acetoxy group underwent Claisen-Schmidt condensation with differently substituted al-dehydes to form the final compounds- the chalcones. The proposed chemical structures were con-firmed by different spectroscopic techniques like FTIR, 1H NMR and Mass spectroscopy. TLC was used to know that the reactants were exhausted and the formation of the product occurred. Sharp melting point of the compounds concludes the purity. Results: The MIC of the compounds 3CP, 3DP, 3EP and 3GP is 20 times the MIC of the standard fluconazole drug against Aspergillus niger. The compound 3GP is as equipotent as the standard drug Pyrazinamide with MIC of 3.12 µg/ml against Mycobacterium tuberculosis. Conclusion: The results are quite promising which on further studies may lead to drug molecules against different microorganisms. Especially, 3EP can be considered as a broad spectrum agent due to its potent activity against different microorganisms like Staphylococcus aureus, Escherichia coli, Klebsiella pneumonia and Candida albicans
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Affiliation(s)
- L Sivasankerreddy
- aSanthiram College of Pharmacy, Nandyal, Andhra Pradesh, India; bCreative Educational Society's College of Pharmacy, Kurnool, India; cBITS Pilani Hyderabad, Hyderabad, Telangana, India
| | - B Nagamani
- aSanthiram College of Pharmacy, Nandyal, Andhra Pradesh, India; bCreative Educational Society's College of Pharmacy, Kurnool, India; cBITS Pilani Hyderabad, Hyderabad, Telangana, India
| | - T Rajkumar
- aSanthiram College of Pharmacy, Nandyal, Andhra Pradesh, India; bCreative Educational Society's College of Pharmacy, Kurnool, India; cBITS Pilani Hyderabad, Hyderabad, Telangana, India
| | - M S Babu
- aSanthiram College of Pharmacy, Nandyal, Andhra Pradesh, India; bCreative Educational Society's College of Pharmacy, Kurnool, India; cBITS Pilani Hyderabad, Hyderabad, Telangana, India
| | - N Y Subbaiah
- aSanthiram College of Pharmacy, Nandyal, Andhra Pradesh, India; bCreative Educational Society's College of Pharmacy, Kurnool, India; cBITS Pilani Hyderabad, Hyderabad, Telangana, India
| | - M S Harika
- aSanthiram College of Pharmacy, Nandyal, Andhra Pradesh, India; bCreative Educational Society's College of Pharmacy, Kurnool, India; cBITS Pilani Hyderabad, Hyderabad, Telangana, India
| | - R Nageswarao
- aSanthiram College of Pharmacy, Nandyal, Andhra Pradesh, India; bCreative Educational Society's College of Pharmacy, Kurnool, India; cBITS Pilani Hyderabad, Hyderabad, Telangana, India
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erkan kariper S, Sayın K, Karakaş D. Structural, Spectroscopic and Activity Calculations on Methanesulfonylhydrazone Derivative Chromium Pentacarbonyl Complexes. JOURNAL OF THE TURKISH CHEMICAL SOCIETY, SECTION A: CHEMISTRY 2018. [DOI: 10.18596/jotcsa.428788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Seyfi S, Alizadeh R, Darvish Ganji M, Amani V. Synthesis, spectral and luminescence study, crystal structure determination and DFT calculation of binuclear palladium(II) complexes. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 190:298-311. [PMID: 28941414 DOI: 10.1016/j.saa.2017.09.024] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Revised: 08/18/2017] [Accepted: 09/12/2017] [Indexed: 06/07/2023]
Abstract
Binuclear palladium(II) complexes with metal-metal (d8-d8) bonding interaction were synthesized by reactions of the 1-methyl-1H-1,2,3,4-tetrazole-5-thiol (Hmtzt) or a mixture of Hmtzt and 1,3-propanediamine (1,3-pda) ligands. Complex [Pd2(μ-mtzt)4]·2CH3CN (1) was synthesized by the reaction of Pd(OAc)2 with Hmtzt dissolved in acetonitrile and complex [Pd2(μ-mtzt)2(mtzt)2(1,3-pda)] (2) was synthesized by reaction of a mixture of Hmtzt and 1,3-propanediamine (dissolved in methanol) with PdCl2 (dissolved in acetonitrile) and were identified through elemental analysis, IR, UV-Vis, 1H NMR, luminescence spectroscopy as well as single-crystal X-ray diffraction method. A single-crystal of complex 1 shows that two Pd(II) centers are linked together by four bridging tetrazole ligands providing a paddle wheel-like arrangement. Also a crystal structure of complex 2 shows that this complex possesses a symmetric structure in which one Pd atom is tetra-coordinated by four sulfur atoms to forms PdS4 and other Pd atom is tetra-coordinated by four nitrogen to forms PdN4 coordination sphere. Density functional theory (DFT) was performed in this study for the Hmtzt ligand and binuclear palladium(II) complexes (1) and (2). The DFT calculation shows PdII-PdII bond lengths of 2.831 and 3.086Å in complex 1 and 2, respectively which are close to the observed bond lengths of 2.802(11) and 3.0911(17)Å from single-crystal X-ray structure. The optimized geometry of the complexes is shown good agreement by X-ray data. Structural properties and molecular descriptors including bond lengths, bond angles, chemical hardness, dipole moment, HOMO-LUMO energy levels, electron transfer were analyzed. The IR spectroscopy was performed using VEDA4 software and UV-Vis spectra were analyzed using time-dependent density functional theory (TD-DFT) method. The theoretical and experimental data were also compared with each other.
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Affiliation(s)
- S Seyfi
- School of Chemistry, Damghan University, P.O. Box 36715-364, Damghan, Iran
| | - R Alizadeh
- School of Chemistry, Damghan University, P.O. Box 36715-364, Damghan, Iran.
| | - M Darvish Ganji
- Department of Nanochemistry, Faculty of Pharmaceutical Chemistry, Pharmaceutical Sciences Branch, Islamic Azad University (IAUPS), Tehran, Iran.
| | - V Amani
- Department of Chemistry, Farhangian University, Tehran, Iran
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DEMİR ÖZKAY Ü, CAN ÖD, TURAN N, ÇAVUŞOĞLU KAYA B. Synthesis and antinociceptive activities of some novel benzimidazole-piperidine derivatives. Turk J Chem 2017. [DOI: 10.3906/kim-1612-76] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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Chagas MBO, Cordeiro NCC, Marques KMR, Rocha Pitta MG, Rêgo MJBM, Lima MCA, Pitta MGR, Pitta IR. New thiazacridine agents: Synthesis, physical and chemical characterization, and in vitro anticancer evaluation. Hum Exp Toxicol 2016; 36:1059-1070. [DOI: 10.1177/0960327116680274] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A series of new thiazacridine agents were synthesized and evaluated as antitumor agents, in terms of not only their cytotoxicity but also their selectivity. The cytotoxicity assay confirmed that all compounds showed cytotoxic activity and selectivity. The new compound, 3-acridin-9-ylmethyl-5-(5-bromo-1 H-indol-3-ylmethylene)-thiazolidine-2,4-dione (LPSF/AA29 – 7a), proved to be the most promising compound as it presents lower half-maximal inhibitory concentration (IC50) values (ranging from 0.25 to 68.03 µM) depending on cell lineage. In HepG2 cells, the lowest IC50 value was exhibited by 3-acridin-9-ylmethyl-5-(4-piperidin-1-yl-benzylidene)-thiazolidine-2,4-dione (LPSF/AA36 – 7b; 46.95 µM). None of the synthesized compounds showed cytotoxic activity against normal cells (IC50 > 100 µM). The mechanism of death induction and cell cycle effects was also evaluated. Flow cytometric analysis revealed that the compounds LPSF/AA29 – 7a and LPSF/AA36 – 7b significantly increased the percentage of apoptotic cells and induced G2/M arrest in the cell cycle progression. Therefore, these new thiazacridine derivatives constitute promising antitumor agents whose cytotoxicity and selectivity properties indicate they have potential to contribute to or serve as a basis for the development of new cancer drugs in the future.
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Affiliation(s)
- MBO Chagas
- Laboratory for Immunomodulation and New Therapeutic Approaches, Federal University of Pernambuco (UFPE), Recife, PE, Brazil
| | - NCC Cordeiro
- Laboratory for Planning and Drug Synthesis, Federal University of Pernambuco (UFPE), Recife, PE, Brazil
| | - KMR Marques
- Laboratory for Immunomodulation and New Therapeutic Approaches, Federal University of Pernambuco (UFPE), Recife, PE, Brazil
| | - MG Rocha Pitta
- Laboratory for Planning and Drug Synthesis, Federal University of Pernambuco (UFPE), Recife, PE, Brazil
| | - MJBM Rêgo
- Laboratory for Immunomodulation and New Therapeutic Approaches, Federal University of Pernambuco (UFPE), Recife, PE, Brazil
| | - MCA Lima
- Laboratory for Planning and Drug Synthesis, Federal University of Pernambuco (UFPE), Recife, PE, Brazil
| | - MGR Pitta
- Laboratory for Immunomodulation and New Therapeutic Approaches, Federal University of Pernambuco (UFPE), Recife, PE, Brazil
| | - IR Pitta
- Laboratory for Immunomodulation and New Therapeutic Approaches, Federal University of Pernambuco (UFPE), Recife, PE, Brazil
- Laboratory for Planning and Drug Synthesis, Federal University of Pernambuco (UFPE), Recife, PE, Brazil
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Design, docking studies and molecular iodine catalyzed synthesis of benzo[a]xanthen-one derivatives as hyaluronidase inhibitors. Med Chem Res 2016. [DOI: 10.1007/s00044-016-1655-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Abstract
18 novel dithiocarbamate derivatives were synthesized in order to investigate their inhibitory potency on acetylcholinesterase enzyme and antimicrobial activity. Structures of the synthesized compounds were elucidated by spectral data and elemental analyses. The synthesized compounds showed low enzyme inhibitory activity. However, they displayed good antimicrobial activity profile. Antibacterial activity of compounds4a,4e, and4p(MIC = 25 μg/mL) was equal to that of chloramphenicol againstKlebsiella pneumoniae(ATCC 700603) andEscherichia coli(ATCC 35218). Most of the compounds exhibited notable antifungal activity againstCandida albicans(ATCC 10231),Candida glabrata(ATCC 90030),Candida krusei(ATCC 6258), andCandida parapsilosis(ATCC 7330). Moreover, compound4a, which carries piperidin-1-yl substituent and dimethylthiocarbamoyl side chain as variable group, showed twofold better anticandidal effect against allCandidaspecies than reference drug ketoconazole.
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