Synthesis and biological activity of 2-aminothiazoles as novel inhibitors of PGE2 production in cells
摘要:
This Letter presents the synthesis and biological evaluation of a collection of 2-aminothiazoles as a novel class of compounds with the capability to reduce the production of PGE(2) in HCA-7 human adenocarcinoma cells. A total of 36 analogs were synthesized and assayed for PGE(2) reduction, and those with potent cellular activity were counter screened for inhibitory activity against COX-2 in a cell free assay. In general, analogs bearing a 4-phenoxyphenyl substituent in the R-2 position were highly active in cells while maintaining negligible COX-2 inhibition. Specifically, compound 5l (R-1 = Me, R-2 = 4-OPh-Ph, R-3 = CH(OH)Me) exhibited the most potent cellular PGE(2) reducing activity of the entire series (EC50 = 90 nM) with an IC50 value for COX-2 inhibition of >5 mu M in vitro. Furthermore, the anti-tumor activity of analog 1a was analyzed in xenograft mouse models exhibiting promising anti-cancer activity. (C) 2012 Elsevier Ltd. All rights reserved.
Visible Light-Mediated Coupling of Thioureas and 1,3-Dicarbonyls: Towards a Leaving Group-Free Synthesis of Aminothiazoles
作者:Irwan Iskandar Roslan、Kian-Hong Ng、Mohammed Ashraf Gondal、Chanbasha Basheer、Mohamed A. Dastageer、Stephan Jaenicke、Gaik-Khuan Chuah
DOI:10.1002/adsc.201701565
日期:2018.4.17
A synthesis of aminothiazoles from various 1,3‐dicarbonyls and thioureas without a leavinggroup has been developed. The reaction is photocatalyzed by tetraiodofluorescein, an organic dye. Under irradiation with green LEDs, a sulfur radical is generated in situ from thiourea, followed by addition to the enol tautomer, forming the aminothiazole backbone. This novel strategy provides a greener alternative
A one-pot, three-componentprotocol for the synthesis of 2-aminothiazoles promoted by iodine from readily available starting materials such as b-diketones/b-ketoesters, arylamines, and NH4SCN has been developed. A wide range of arylamines was tolerated well to produce the expected polysubstituted 2-aminothiazoles in moderate to good yields. The characteristic features of this methodology include operational
Thiazole fused thiosemicarbazones: Microwave-assisted synthesis, biological evaluation and molecular docking study
作者:Neelam P. Prajapati、Kinjal D. Patel、Rajesh H. Vekariya、Hitesh D. Patel、Dhanaji P. Rajani
DOI:10.1016/j.molstruc.2018.11.025
日期:2019.3
In the present study, series of novel compounds (E)-2-(1-(4-methyl-2-(substituted-phenylamino)thiazol-5-yl)ethylidene)hydrazinecarbothio-amide (5a-j) and (E)-N-cyclohexyl-2-(1-(4-methyl-2-(substituted-phenylamino)thiazol-5-yl)ethylidene)hydrazinecarbothioamide (6a-j) have been synthesized using microwave irradiation method in high yields and characterized by IR, H-1 NMR, C-13 NMR and mass spectral analysis. Synthesized compounds were evaluated for their in-vitro antimicrobial, antimalarial and anti-tuberculosis activity as well as in-silico study. The obtained results indicate that compound 6b and 6g were found to be the most potent against S. aureus bacterial strain. Further, the molecular docking study has been performed for all the new compounds with the immune system of S. aureus (PDB ID: 5D1Q) as a target enzyme, and this study validated the experimental results. (C) 2018 Elsevier B.V. All rights reserved.
GAWANDE, N. G.;SHINGARE, M. S., INDIAN J. CHEM., 26,(1987) N 4, 351-355