- Synthesis and antimicrobial activity of tetradentate ligands bearing hydrazone and/or thiosemicarbazone motifs and their diorganotin(IV) complexes
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Four novel ligands derived from 2,3-butanedione have been synthesized, two dissymmetric thiosemicarbazone/3-hydroxy-2-naphthohydrazone ligands, H2L1 (bearing 4-isopropyl-3-thiosemicarbazone) and H2L2 (containing
- González-García, Cristina,Mata, Alejandro,Zani, Franca,Mendiola, M. Antonia,López-Torres, Elena
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- Design, synthesis, and biological evaluations of (E)-2-(1-[2-mercapto-4-methyl-1-phenyl-1H-imidazol-5-yl]ethylidene)hydrazinecarbothioamide derivatives as antimicrobial agents
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In recent year, the development of new drugs as antibacterial agents is an important resolution to overcome drug-resistant pathogens. Imidazole derivatives were synthesized using the microwave irradiation method and were characterized using spectral analysis techniques such as proton nuclear magnetic resonance, mass, and Fourier transform infrared spectroscopy. All the analogous were assessed for their in vitro antimicrobial activity and in silico; minimum inhibition concentration values of some conjugates were evaluated against extended spectrum beta-lactamases, vancomycin-resistant enterococci, and Methicillin-resistant Staphylococcus aureus strains from clinical samples. All the analogous were used as ligands in molecular docking and adsorption, distribution, metabolism, and excretion against saDHPS. Furthermore, compounds were also examined for their in vitro antituberculosis and antimalarial activity.
- Daraji, Drashti G.,Rajani, Dhanji P.,Jayanthi, Sivaraman,Patel, Hitesh D.
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supporting information
p. 178 - 193
(2021/12/08)
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- Synthesis, cytotoxicity, and in vivo antitumor activity study of parthenolide semicarbazones and thiosemicarbazones
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Parthenolide is an important sesquiterpene lactone with potent anticancer activities. In order to further improve its biological activity, a series of parthenolide semicarbazone or thiosemicarbazone derivatives was synthesized and evaluated for their anti
- Du, Guohua,Jia, Xinxin,Li, Yan,Liu, Qi,Wang, Shiyi,Zeng, Binglin,Zhang, Chen
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- Synthesis and characterization of a new series of thiadiazole derivatives as potential anticancer agents
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Cancer is one of the most common causes of death in the world. Despite the importance of combating cancer in healthcare systems and research centers, toxicity in normal tissues and the low efficiency of anticancer drugs are major problems in chemotherapy. Nowadays the aim of many medical research projects is to discover new safer and more effective anticancer agents. 1,3,4-Thiadiazole compounds are important fragments in medicinal chemistry because of their wide range of biological activities, including anticancer activities. The aim of this study was to determine the capacity of newly synthesized 1,3,4-thiadiazole compounds as chemotherapeutic agents. The structures of the obtained compounds were elucidated using 1H-NMR, 13C-NMR and mass spectrometry. Although the thiadiazole derivatives did not prove to be significantly cytotoxic to the tumour tissue cultures, compound 4i showed activity against the C6 rat brain cancer cell line (IC50 0.097 mM) at the tested concentrations.
- ?evik, Ulviye Acar,Osmaniye, Derya,Levent, Serkan,Sa?lik, Begüm Nurpelin,?avu?o?lu, Betül Kaya,?zkay, Yusuf,Kaplancikl, Zafer Aslm
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- Synthesis of novel quinoline-thiosemicarbazide hybrids and evaluation of their biological activities, molecular docking, molecular dynamics, pharmacophore model studies, and ADME-Tox properties
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In the present study, a novel series of N-((substituted)carbamothioyl)-2,4-dimethylquinoline-3-carboxamide (7a-7s) was synthesized by microwave-assisted method. Structure of these derivatives was examined by spectroscopic techniques such as 1H NMR, 13C NMR, FT-IR, and ESI-MS. Further, the novel synthesized compounds were evaluated for their in-vitro biological activities against antibacterial, antifungal, antimalarial, and antituberculosis activity as well as for in-silico study. The antimalarial results demonstrated that compounds 7c and 7q (0.02 μg/mL) have notable potency against Plasmodium falciparum compared with chloroquine (0.02 μg/mL); compounds 7l (0.10 μg/mL), 7e, 7s (0.19 μg/mL), 7b, 7p (0.15 μg/mL), 7a, 7f, and 7f (0.25 μg/mL) also exhibited good activity against P. falciparum compared with quinine (0.26 μg/mL) as standard drug. Docking was performed on PFDHFR-TS, given the effect of compounds against the P. falciparum strain was excellent in comparison with standard drug. Molecular docking suggested that compounds 7b, 7i and 7c, 7e, and 7l closely bind with the active site of protein 3JSU and 4DP3, respectively, and compared with biological activity. We have also carried out molecular dynamics simulation on the best dock compound 7e complex with PDB: 3JSU to check the stability of docked complex and their molecular interaction. The calculated ADME-Tox descriptors for the synthesized compounds validated good pharmacokinetics properties, suggesting that these compounds could be used as hit for the development of the new active agents.
- Darji, Drashti G.,Patel, Dhaval B.,Patel, Hitesh D.,Patel, Krupa R.,Rajani, Dhanji P.,Rajani, Smita D.
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- Novel 1,3,4-thiadiazole compounds as potential MAO-A inhibitors-design, synthesis, biological evaluation and molecular modelling
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Monoamine oxidases (MAOs) are important drug targets for the management of neurological disorders. Herein, a series of new 1,3,4-thiadiazole derivatives bearing various alkyl/arylamine moieties as MAO inhibitors were designed and synthesized. All of the compounds were more selective against hMAO-A than hMAO-B. The half maximal inhibitory concentration (IC50) values of most of the compounds were lower than that of the common drug moclobemide (IC50 = 4.664 μM) and compound 6b was proven to be the most active compound (IC50 = 0.060 μM). Moreover, it was seen that compound 6b showed a similar inhibition profile to that of clorgyline (IC50 = 0.048 μM). The inhibition profile was found to be reversible and competitive for compound 6b with MAO-A selectivity. Molecular modelling studies aided in the understanding of the interaction modes between compound 6b and MAO-A. Furthermore, this compound was predicted to have a good pharmacokinetic profile and high BBB penetration. Therefore, such compounds are of interest towards developing new MAO inhibitors.
- Kaplancikli, Zafer Asim,Levent, Serkan,Osmaniye, Derya,?zkay, Yusuf,Acar ?evik, Ulviye,Kaya ?avu?o?lu, Betül,Sa?lik, Begüm Nurpelin
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p. 1063 - 1074
(2020/10/06)
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- Synthesis, characterization and biological evaluation of novel 1-N-substituted thiocarbomoyl-3-ferrocenyl-2-pyrazoline derivatives
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Some novel 1-N-substituted thiocarbomoyl-3-ferrocenyl-2-pyrazoline derivatives were synthesized and evaluated for in vitro antiamoebic activity against HM1:IMSS strain of Entamoeba histolytica. The results showed that most of the compounds exhibited promising activity (IC50 values in the range of 0.050-1.683 μM) than the reference drug metronidazole (IC50 = 1.78 μM). Active compounds were further screened for cytotoxicity against human embryonic kidney-293 (HEK-293) normal cell lines to ensure their toxic effect and the results revealed that active compounds were least toxic in the concentration range of 2.5-50 μM for 48 h and 2.5-25 μM for 72 h. At 100 μM for 48 h and at 50 μM for 72 h only four compounds 2c, 2h, 2k and 2l showed maximum viability and least cytotoxicity, respectively, concluding that all the screened compounds were least cytotoxic against human embryonic kidney-293 (HEK-293) normal cell lines in the concentration range of 2.5-50 and 2.5-25 μM.
- Parveen, Humaira,Alatawi, Raedah Aiyed Suliman,Khan, Salman Ahmad,Al-Ahmdi, Mohammed Issa,Mukhtar, Sayeed,Azam, Amir,Elsayed, Nadia H.
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p. 1835 - 1840
(2016/07/06)
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- An efficient synthesis of novel carbohydrate and thiosemicarbazone hybrid benzimidazole derivatives and their antimicrobial evaluation
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A library of thiosemicarbazide hybrid 2-(aldo-polyhydroxyalkyl)benzimidazole derivatives have been designed and synthesized with simple and eco-friendly methodologies. The structures of the compounds have been elucidated with the aid of elemental analysis, IR, mass and 1H NMR spectral data. These novel synthesized compounds have been evaluated for their antibacterial activity against two gram-positive bacteria (S. aureus and S. pyogenus) and two gram-negative bacteria (P. aeruginosa and E. coli). The title compounds have also been studied for their antifungal activity against C. albicans, A. niger and A. clavatus using the broth dilution technique.
- Panchal, Shyamali N.,Vekariya, Rajesh H.,Patel, Kinjal D.,Prajapati, Shraddha M.,Rajani, Dhanji P.,Rajani, Smita D.,Patel, Hitesh D.
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p. 604 - 612
(2017/01/18)
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- NEW 2-AMINOTHIADIAZOLE DERIVATIVES
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The present invention relates to a compound of formula (I), or a pharmaceutically acceptable salt or N-oxide thereof: wherein:. L represents a direct bond or a -S(O)2- group, ? n is an integer having a value from 0 to 2, ? R1 represents a pyridyl group or an imidazo[1,2-α]pyridinyl group, wherein the pyridyl group is substituted with one or more substituents selected from halogen atoms, a hydroxy group, a C1-4 alkyl group and a C1-4 alkoxy group, or ? R1 represents a group of formula: wherein:. Ra and Rb independently represent a hydrogen atom, halogen atom or a linear or branched C1-4, alkyl group,. Rc represents a hydroxy group, a linear or branched C1-4 alkyl group or C1-4 alkoxy group wherein the alkyl and the alkoxy groups independently are optionally substituted with one or more substituents selected from hydroxy group, cyano group and-NR'R" groups and wherein R' represents a hydrogen atom or a linear or branched C1-4 alkyl group, R" represents a hydrogen atom or a linear or branched C1-4 alkyl group optionally substituted with a hydroxycarbonyl group; or R' and R" together with the nitrogen atom to which they are attached form a 4 to 6 membered, saturated heterocyclic ring optionally substituted with a hydroxycarbonyl group.. R2 represents a pyridyl group, a C3-6 cycloalkyl group or a phenyl group which is optionally substituted with one or more substituents selected from halogen atoms, cyano group, and C1-4 alkoxy group; and. R3 represents a C3-6 cycloalkyl group, a C3-6 cycloalkyl-C1-2 alkyl group or a linear or branched C2-4 alkyl group optionally substituted with one or more substituents selected from halogen atoms and C1-2 alkoxy group.
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Page/Page column 36
(2011/06/26)
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- New 2-aminothiadiazole derivatives
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The present invention relates to a compound of formula (I), or a pharmaceutically acceptable salt or N-oxide thereof: wherein: ? L represents a direct bond or a -S(O)2- group, ? n is an integer having a value from 0 to 2, ? R1 represents a pyridyl group or an imidazo[1,2-a]pyridinyl group, wherein the pyridyl group is substituted with one or more substituents selected from halogen atoms, a hydroxy group, a C1-4 alkyl group and a C1-4 alkoxy group, or ? R1 represents a group of formula: wherein: o Ra and Rb independently represent a hydrogen atom, halogen atom or a linear or branched C1-4 alkyl group, o Rc represents a hydroxy group, a linear or branched C1-4 alkyl group or C1-4 alkoxy group wherein the alkyl and the alkoxy groups independently are optionally substituted with one or more substituents selected from hydroxy group, cyano group and-NR'R" groups and wherein ■ R' represents a hydrogen atom or a linear or branched C1-4 alkyl group, ■ R" represents a hydrogen atom or a linear or branched C1-4 alkyl group optionally substituted with a hydroxycarbonyl group; or ■ R' and R" together with the nitrogen atom to which they are attached form a 4 to 6 membered, saturated heterocyclic ring optionally substituted with a hydroxycarbonyl group. ? R2 represents a pyridyl group, a C3-6 cycloalkyl group or a phenyl group which is optionally substituted with one or more substituents selected from halogen atoms, cyano group, and C1-4 alkoxy group; and ? R3 represents a C3-6 cycloalkyl group, a C3-6 cycloalkyl-C1-2 alkyl group or a linear or branched C2-4 alkyl group optionally substituted with one or more substituents selected from halogen atoms and C1-2 alkoxy group.
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Page/Page column 25-26
(2011/08/03)
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- Efficient syntheses of thiadiazole peptides
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Novel N-(Cbz-aminoacyl)thiosemicarbazides 3a-c were cyclized by treatment with sulfuric acid to give 1,3,4-thiadiazoles 4a-c. Compounds 4a-c reacted with N-(Cbz-aminoacyl)- and -dipeptidoylbenzotriazoles to afford chirally pure 1,3,4-thiadiazol-2-yl-subst
- Katritzky, Alan R.,El-Nachef, Claudia,Bajaj, Kiran,Kubik, Jonathan,Haase, Danniebelle N.
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scheme or table
p. 6009 - 6011
(2010/11/16)
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- Synthesis and characterization of new thiazolidin-4-one derivatives
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The synthesis of some new functionalized thiazolidin-4-one derivatives has been described. The N-substituted-thiosemicarbazides 3a-3i were obtained though the reaction of alkylamines 2a-2i, carbon disulfide, and hydrazine hydrate. The condensation reaction between 3a-3i and 4-amino-2-methanesulfanylpyrimidine-5- carboxaldehyde 1 afforded the thiosemicarbazones 4a-4i. The corresponding thiazolidin-4-ones 5a-5i were prepared by cyclization of 4a-4i with ethyl bromoacetate. The structures of the final products were confirmed by IR, 1H NMR, 13C NMR, and HRMS.
- Hu, Bao Xiang,Shen, Zhen Lu,Lu, Jun,Hu, Xin Quan,Mo, Wei Min,Sun, Nan,Xu, Dong
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experimental part
p. 523 - 535
(2009/09/25)
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- Thiosemicarbazones active against Clostridium difficile
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A set of closely related furylidene thiosemicarbazones was prepared and screened against various clinically important Gram-positive bacteria. One compound containing an ethylene spacer and a 5-nitrofuryl group was found to have promising activity against Clostridium difficile.
- Costello, Cait,Karpanen, Tarja,Lambert, Peter A.,Mistry, Preena,Parker, Katy J.,Rathbone, Daniel L.,Ren, Jiangmeng,Wheeldon, Laura,Worthington, Tony
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p. 1708 - 1711
(2008/09/19)
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- NOVEL HSP90 INHIBITOR
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Disclosed is a triazole derivative represented by the general formula (1) below or a pharmacologically acceptable salt thereof. Also disclosed are a prodrug of such a triazole derivative and an HSP90 inhibitor containing any one of them as an active constituent. (1) (In the formula, X represents a halogen atom, an optionally substituted alkyl group, an optionally substituted alkenyl group or the like; Y represents a mercapto group, a hydroxyl group, an optionally substituted sulfonyl group, an optionally substituted amino group or the like; and R represents an optionally substituted aryl or amino group or the like.)
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Page/Page column 55
(2010/11/28)
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- Semicarbazone-based inhibitors of cathepsin K, are they prodrugs for aldehyde inhibitors?
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Starting from potent aldehyde inhibitors with poor drug properties, derivatization to semicarbazones led to the identification of a series of semicarbazone-based cathepsin K inhibitors with greater solubility and better pharmacokinetic profiles than their parent aldehydes. Furthermore, a representative semicarbazone inhibitor attenuated bone resorption in an ex vivo rat calvarial bone resorption model. However, based on enzyme inhibition comparisons at neutral pH, semicarbazone hydrolysis rates, and 13C NMR experiments, these semicarbazones probably function as prodrugs of aldehydes.
- Adkison, Kim K.,Barrett, David G.,Deaton, David N.,Gampe, Robert T.,Hassell, Anne M.,Long, Stacey T.,McFadyen, Robert B.,Miller, Aaron B.,Miller, Larry R.,Payne, J. Alan,Shewchuk, Lisa M.,Wells-Knecht, Kevin J.,Willard Jr., Derril H.,Wright, Lois L.
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p. 978 - 983
(2007/10/03)
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- Synthesis and antiamoebic activity of 3,7-dimethyl-pyrazolo[3,4-e][1,2,4] triazin-4-yl thiosemicarbazide derivatives
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A series of 3,7-dimethyl-pyrazolo[3,4-e][1,2,4]triazin-4-yl thiosemicarbazide derivatives 3-22 were prepared and evaluated in vitro against HM1:1MSS strain of Entamoeba histolytica, to identify the compounds for antiamoebic activity. They exhibited antiamoebic activity in the range (IC 50 = 0.81-7.31 μM). The results were compared to the activity of known drug metronidazole. It is inferred from the in vitro studies that the compounds 10, 11, 17 and 18 were found to be significantly better inhibitors of E. histolytica since IC50 values in the μM range elicited by these compounds are much lower than metronidazole. Besides, compounds 11 and 17 have shown the most promising antiamoebic activity (IC50 = 0.81 μM of 11, IC50 = 0.84 μM of 17 versus IC50 = 1.81 μM of metronidazole). The study suggests the possibility of developing triazine analogues as potential drug candidates for antiamoebic activity.
- Singh, Shailendra,Husain, Kakul,Athar, Fareeda,Azam, Amir
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p. 255 - 262
(2007/10/03)
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- Synthesis and antitumor activity of new thiosemicarbazones of 2-acetylimidazo[4,5-b]pyridine
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A number of thiosemicarbazones of 2-acetyl-imidazo[4,5-b]pyridine were prepared in order to investigate their in vitro antineoplastic activities. Three compounds: (i) 2-acetylimidazo[4,5-b]pyridin-4-tert-butyl-3-thiosemicarbazone [(A7), NSC674098], (ii) 2-acetylimidazo[4,5-e]pyridin-4-tert-butyl-3- thiosemicarbazone [(A9), NSC674099], (iii) 2-acetylimidazo[4,5-i] pyridin-4-cyclohexyl-3-thiosemicarbozone [(A11), NSC674101] showed remarkable activity against some of the cell lines tested. The Biological Evaluation Committee of N.C.I, determined that further secondary testing should be carried out (these compounds were tested against prostate cancer).
- Mylonas, Stavros,Mamalis, Athanasios
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p. 1273 - 1281
(2007/10/03)
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- Synthesis and in vitro antiprotozoal activity of 5-nitrothiophene-2-carboxaldehyde thiosemicarbazone derivatives.
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Several thiosemicarbazone derivatives of 5-nitrothiophene-2-carboxaldehyde were prepared by the simple process in which N(4)-thiosemicarbazone moiety was replaced by aliphatic, arylic and cyclic amine. Among these thiosemicarbazones compound 11 showed significant antiamoebic activity whereas compound 3 was more active antitrichomonal than the reference drug.
- Bharti, Neelam,Husain, Kakul,Gonzalez Garza,Cruz-Vega, Delia E,Castro-Garza,Mata-Cardenas, Benito D,Naqvi, Fehmida,Azam, Amir
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p. 3475 - 3478
(2007/10/03)
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- Process for the production of 2-amino-5-mercapto-1,3,4-thiadiazole
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2-Amino-5-mercapto-1,3,4-thiadiazoles can be produced in very high yields from thiosemicarbazides and carbon disulfide in aqueous phase by working in the presence of the corresponding ammonium salt of bis-2,5-mercapto-1,3,4-thiadiazole at a temperature above 40° C. Preferably the process is carried out in the presence of the mother liquor from a previous reaction.
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- Process for producing 2-amino or selected 2-(substituted)amino-5-mercapto-1,3,4-thiadiazole compounds
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Disclosed is a process for producing 2-amino or 2-(lower alkyl or phenyl)amino-5-mercapto-1,3,4-thiadiazole compounds by reacting the corresponding thiosemicarbazide with an alkali metal lower alkyl xanthate salt.
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- Nonsteroid regulators of ovarian cycles. I. 1, 2-bis-(thiocarbamoyl) hydrazines
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24 New 1,2-bis-(thiocarbamoyl)hydrazines were administered (60 mg/kg of feed) to hens in their laying period. Egg-laying was followed before, during, and after the 21-day administration. In the group of N-(allylthiocarbamoyl)hydrazines the biological activity regularly increased, a further increase being achieved by incorporating oxygen into the nitrogen heterocycle. The incorporation of sulphur caused a strong decrease in the inhibitory activity.
- Budesinsky,Roubinek,Kral,Nemcova,Janata
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p. 200 - 206
(2007/10/05)
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