Modular Synthesis of Di- and Trisubstituted Imidazoles from Ketones and Aldehydes: A Route to Kinase Inhibitors
作者:Ian de Toledo、Thiago A. Grigolo、James M. Bennett、Jonathan M. Elkins、Ronaldo A. Pilli
DOI:10.1021/acs.joc.9b01844
日期:2019.11.1
A one-pot and modular approach to the synthesis of 2,4(5)-disubstituted imidazoles was developed based on ketone oxidation, employing catalytic HBr and DMSO, followed by imidazole condensation with aldehydes. This methodology afforded twenty-nine disubstituted NH-imidazoles (23%-85% yield). A three-step synthesis of 20 kinase inhibitors was achieved by employing this oxidation-condensation protocol
of imidazole ring by a Cs2CO3-promoted annulation of amidoximes with terminal alkynes in DMSO has been developed. This protocol provides a simple synthetic route with high atom-utilization for the synthesis of 2,4-disubstituted imidazoles in good yields under transition-metal-free and ligand-free conditions. Internal alkynes can also undergo the annulation to give 2,4,5-trisubstituted imidazoles.
In vivo screening of diarylimidazoles as anticonvulsant agents
作者:Mirko Rivara、Valentina Zuliani
DOI:10.1007/s00044-011-9869-9
日期:2012.11
In this study, the anticonvulsant activity evaluation of a series of new 2,4(1H)-diarylimidazoles, characterized by the presence of different substituents on the aryl rings, was described. The anticonvulsant activity profile of those compounds was determined by Maximal Electroshock Seizure (MES), subcutaneous Metrazol Seizure (scMet) tests, and 6-Hz seizure model, whereas their neurotoxicity was examined using rotarod test. The trifluoromethoxy derivative, obtained starting from phenylglyoxal, p-OCF3-benzaldehyde, and ammonium acetate in methanol (r.t.), exhibited a great ability to prevent the seizures induced in the 6-Hz test, becoming a new promising molecule to develop for the treatment of therapy-resistant partial seizures.
NEUNHOEFFER H.; LEHMANN B.; EWALD H., J. LIEBIGS ANN. CHEM., 1977, NO 9,
作者:NEUNHOEFFER H.、 LEHMANN B.、 EWALD H.
DOI:——
日期:——
CERTAIN DIARYLIMIDAZOLE DERIVATIVES; A NEW CLASS OF NPY SPECIFIC LIGANDS