Synthesis and biological evaluation of novel benzoquinones as potential antimicrobial agents
摘要:
New series of 2,5-dihydroxyphenyl-1,3-thiazoles 4a-l was synthesized by reacting 2,5-dihydroxyphenacyl bromide with various 4-aryl thiosemicarbazones 3a-l that on oxidation with ferric chloride yielded the corresponding N (1)-substituted benzylidene-N (2)-[3-aryl-4-(1,4-benzoquinon-2-yl)-1,3-thiazol-2-ylidene]hydrazines 5a-l. They were evaluated for antibacterial activity against Staphylococcus aureus and Bacillus subtilis as Gram-positive bacteria, Escherichia coli and Pseudomonas aeruginosa as Gram-negative bacteria. They were also evaluated for their in vitro antifungal potential against Candida albicans. Almost all tested compounds were found to possess variable degrees of antimicrobial activity. The obtained data revealed that compounds 4b-h and 5e, 5f and 5l exhibited promising antimicrobial activity against the tested organisms of which compound 4b proved to be the most active.
Design and Synthesis of Novel Thiosemicarbazones as Potent Anti-breast Cancer Agents
作者:Mashooq Ahmad Bhat、M. Al-Tahhan、Mohamed A. Al-Omar、Ahmed M. Naglah、Abdullah Al-Dhfyan
DOI:10.2174/1570180815666181008100944
日期:2019.3.8
Thiosemicarbazones and its derivatives received a great pharmaceutical importance due to their prominent biological activities. Methods: A series of disubstituted thiosemicarbazone derivatives (1-12) were designed and synthesized as pure compounds in good yield. All the synthesized compounds were analyzed by spectral data. The anticancer activity of all the compounds was performed against breast cancer MCF-7
One-pot and catalyst-free synthesis of thiosemicarbazones via multicomponent coupling reactions
作者:Silvio Cunha、Tiago Lima da Silva
DOI:10.1016/j.tetlet.2009.02.134
日期:2009.5
A novel and efficient procedure for the synthesis of thiosemicarbazones has been achieved via a multi-component and catalyst-free reaction of phenyl or p-chlorophenyl isothiocyanate, hydrazine, and aldehydes or ketones. The method afforded 20 thiosemicarbazones in good yields and short reaction time. (c) 2009 Elsevier Ltd. All rights reserved.
Discovery of Novel Bromophenol–Thiosemicarbazone Hybrids as Potent Selective Inhibitors of Poly(ADP-ribose) Polymerase-1 (PARP-1) for Use in Cancer
Poly(ADP-ribose) polymerase-1 (PARP-1) is a new potential target for anticancer drug discovery. A series of bromophenol-thiosemicarbazone hybrids as PARP-1 inhibitors were designed, synthesized, and evaluated for their antitumor activities. Among them, the most promising compound, 11, showed excellent selective PARP-1 inhibitory activity (IC50 = 29.5 nM) over PARP-2 (IC50 > 1000 nM) and potent anticancer
Synthesis and biological evaluation of novel benzoquinones as potential antimicrobial agents
作者:Ibrahim Chaaban、El Sayeda M. El Khawass、Mona A. Mahran、Heba A. Abd El Razik、Nehad S. El Salamouni、Abeer E. Abdel Wahab
DOI:10.1007/s00044-012-0076-0
日期:2013.2
New series of 2,5-dihydroxyphenyl-1,3-thiazoles 4a-l was synthesized by reacting 2,5-dihydroxyphenacyl bromide with various 4-aryl thiosemicarbazones 3a-l that on oxidation with ferric chloride yielded the corresponding N (1)-substituted benzylidene-N (2)-[3-aryl-4-(1,4-benzoquinon-2-yl)-1,3-thiazol-2-ylidene]hydrazines 5a-l. They were evaluated for antibacterial activity against Staphylococcus aureus and Bacillus subtilis as Gram-positive bacteria, Escherichia coli and Pseudomonas aeruginosa as Gram-negative bacteria. They were also evaluated for their in vitro antifungal potential against Candida albicans. Almost all tested compounds were found to possess variable degrees of antimicrobial activity. The obtained data revealed that compounds 4b-h and 5e, 5f and 5l exhibited promising antimicrobial activity against the tested organisms of which compound 4b proved to be the most active.