Novel pyrazoles and pyrazolo[1,2- a ]pyridazines as selective COX-2 inhibitors; Ultrasound-assisted synthesis, biological evaluation, and DFT calculations
作者:Nagat Ghareb、Hosam A. Elshihawy、Mohamed M. Abdel-Daim、Mohamed A. Helal
DOI:10.1016/j.bmcl.2017.04.020
日期:2017.6
devoid of ulcerogenic activity. Herein, we report the design and synthesis of a series of pyrazoles and pyrazolo[1,2-a]pyridazines with selective COX-2 inhibitory activity and in vivo anti-inflammatory effect. Both series were accessed through acid-catalyzed ultrasound-assisted reactions. The most active compounds in this study are two novel molecules, 11 and 16, showing promising selectivity and decent
Microwave irradiation method was used for synthesis of isoxazolines. Claisen Schmidt reaction of different aromatic aldehydes with acetanilide gave acrylamides (1a-1h) which on further reaction with hydroxylamine hydrochloride (in the presence of sodium hydroxide) afforded isoxazolines (2a-2h). Physical data of all the synthesized compounds were recorded. Isoxazolines were characterized by their IR and 1H NMR spectra. All the synthesized isoxazolines were screened for their antifungal activity against fungi namely Drechslera maydis and Rhizoctonia solani isolated from maize. Isoxazolines having chloro substitution on benzene ring found to be most effective followed by fluoro and nitro substituted compounds. None of the compound was registered as effective as Bavistin.