56913-16-7Relevant academic research and scientific papers
Visible light-mediated oxidative quenching reaction to electron-rich epoxides: Highly regioselective synthesis of α-bromo (di)ketones and mechanism study
Guo, Lin,Yang, Chao,Zheng, Lewei,Xia, Wujiong
, p. 5787 - 5792 (2013/09/12)
A novel and simple procedure was developed for the regioselective synthesis of α-bromo (di)ketones from electron-rich epoxides via visible light photoredox catalysis. Through optimization of solvent and light source, the reaction can be rapidly achieved under mild conditions. Moreover, the possible reaction mechanism was proposed and further supported by control experiments.
Synthesis, spectral studies and biological evaluation of a novel series of 2-substituted-5,6-diarylsubstituted imidazo(2,1-b)-1,3, 4-thiadiazole derivatives as possible anti-tubercular agents
Palkar, Mahesh B.,Noolvi, Malleshappa N.,Maddi, Veeresh S.,Ghatole, Mangala,Nargund, Laxmivenkat G.
experimental part, p. 1313 - 1321 (2012/08/07)
A novel series of 18 analogs of 2-substituted-5,6- diarylsubstituted imidazo(2,1-b)-1,3,4-thiadiazole 6a-r have been synthesized by the reaction of 2-amino-5-substituted- 1,3,4-thiadiazoles 5a-d and an appropriately substituted a-bromo-1,2-(p-substituted)diaryl-1-ethanones 4a-e. Structures of these compounds were established by physiochemical, elemental analysis and spectral data. All the title compounds were tested for their in-vitro anti-tubercular activity against Mycobacterium tuberculosis H37Rv using Alamar Blue susceptibility test and the activity expressed as the minimum inhibitory concentration (MIC) in lg/ml. Among synthesized compounds, compound 6h (MIC = 1.25 μg/ml) exhibited excellent anti-tubercular activity with respect to other synthesized compounds and reference drugs. Compounds 6c, 6f, and6g have also displayed an encouraging anti-tubercular activity profile. Further, some title compounds were also assessed for their cytotoxic activity (IC 50) against in a mammalian Vero cell line using MTT assay. The results reveal that these compounds exhibit anti-tubercular activity at non-cytotoxic concentrations. Springer Science+Business Media, LLC 2011.
Synthesis and biological evaluation of 2-trifluoromethyl/sulfonamido-5,6-diaryl substituted imidazo[2,1-b]-1,3,4-thiadiazoles: A novel class of cyclooxygenase-2 inhibitors
Gadad, Andanappa K.,Palkar, Mahesh B.,Anand,Noolvi, Malleshappa N.,Boreddy, Thippeswamy S.,Wagwade
, p. 276 - 283 (2008/03/28)
A series of 2-trifluoromethyl/sulfonamido-5,6-diarylsubstituted imidazo[2,1-b]-1,3,4-thiadiazole derivatives 15a-j have been synthesized by the reaction of 2-amino-5-trifluoromethyl/sulfonamido-1,3,4-thiadiazoles 14a-b and appropriately substituted α-bromo-1,2-(p-substituted)diaryl-1-ethanones 13a-h. Structures of these compounds were established by IR, 1H NMR, 13C NMR, Mass, and HRMS data. The selected compounds were evaluated for their preliminary in vitro cyclooxygenase inhibitory activity against COX-2 and COX-1enzymes using colorimetric method. The compounds tested showed selective inhibitory activity toward COX-2 (80.6-49.4%) over COX-1 (30.6-8.6), amongst them compounds 15f and 15j showed appreciable COX-2 selective inhibitory activity. These compounds also exhibited significant anti-inflammatory activity (70.09-42.32%), which is comparable to that of celecoxib in the carrageenan-induced rat paw edema method.
Concerning the reaction mechanism of the hydantoin synthesis according to Biltz, I: Proof of the intermediates
Schwenker,Guo,Bernhart
, p. 779 - 783 (2007/10/02)
The reaction mechanism of the rearrangement occurring during the hydantoin synthesis according to Biltz, proposed by Butler and Leitch, has been ascertained. The intermediate 3a, already proposed by Biltz, could be isolated out of the reaction mixture. Th
Antiinflammatory Activity of 5,6-Diaryl-2,3-dihydroimidazothiazoles. Isomeric 4-Pyridyl and 4-Substituted Phenyl Derivatives
Lantos, I.,Bender, P. E.,Razgaitis, K. A.,Sutton, B. M.,DiMartino, M. J.,et al.
, p. 72 - 75 (2007/10/02)
Isomeric 5(6)-(4-pyridyl)- and 6(5)-(4-substituted-phenyl)-2,3-dihydroimidazo(2,1-b>thiazoles were prepared by a mixed benzoin-imidazothione route, and their structures were assigned by spectral comparison to compounds of established substitution pattern.
