Direct Preparation of Heteroaromatic Compounds from Alkenes
作者:Timothy Donohoe、Mikhail Kabeshov、Akshat Rathi、Ian Smith
DOI:10.1055/s-0030-1259034
日期:2010.12
A series of aromatic heterocycles, thiazoles, imidazoles, and dimethoxyindoles, can be synthesised directly from alkenes via a ketoiodination-cyclisation protocol. The alkene starting materials are themselves easily accessible by many different and well-established approaches, and allow access to various aromatic heterocycles with excellent yields and regioselectivity.
2,4(5)-Diarylimidazoles: Synthesis and biological evaluation of a new class of sodium channel blockers against hNav1.2
作者:Mirko Rivara、Aparna R. Baheti、Marco Fantini、Giuseppe Cocconcelli、Chiara Ghiron、Christopher L. Kalmar、Natasha Singh、Ellen C. Merrick、Manoj K. Patel、Valentina Zuliani
DOI:10.1016/j.bmcl.2008.09.036
日期:2008.10
4(5)-diarylimidazoles were prepared through a simple and efficient synthesis and evaluated as potential inhibitors of hNa(v)1.2 sodium channel currents. One member of this series (4) exhibited profound inhibition of Na(v)1.2 currents, emerging as a promising lead compound for further structure-activity relationship studies for the development of novel sodium channel blockers.
Structure–activity relationship studies on 2-heteroaryl-4-arylimidazoles NPY5 receptor antagonists
作者:Richard L. Elliott、Robert M. Oliver、Janet A. LaFlamme、Melissa L. Gillaspy、Marlys Hammond、Richard F. Hank、Tristan S. Maurer、Demetria L. Baker、Paul A. DaSilva-Jardine、Ralph W. Stevenson、Christine M. Mack、James V. Cassella
DOI:10.1016/s0960-894x(03)00747-9
日期:2003.10
A series of 2-heteroaryl-4-arylimidazoles with potent in vitro activity at the NPY5 receptor was developed. Introduction of electron-withdrawing groups on the 4-aryl ring led to a significant improvement of in vitro potency. Several analogues from this series had anorectic activity in rodent feeding models, but were also found to have undesired behavioral effects in spontaneous locomotor activity. (C) 2003 Elsevier Ltd. All rights reserved.
Anticonvulsant activity of 2,4(1H)-diarylimidazoles in mice and rats acute seizure models
作者:Valentina Zuliani、Marco Fantini、Aradhya Nigam、James P. Stables、Manoj K. Patel、Mirko Rivara
DOI:10.1016/j.bmc.2010.09.029
日期:2010.11.15
2,4(1H)-Diarylimidazoles have been previously shown to inhibit hNaV1.2 sodium (Na) channel currents. Since many of the clinically used anticonvulsants are known to inhibit Na channels as an important mechanism of their action, these compounds were tested in two acute rodent seizure models for anticonvulsant activity (MES and scMet) and for sedative and ataxic side effects. Compounds exhibiting antiepileptic activity were further tested to establish a dose response curve (ED(50)). The experimental data identified four compounds with anticonvulsant activity in the MES acute seizure rodent model (compound 10, ED(50) = 61.7 mg/kg; compound 13, ED(50) = 46.8 mg/kg, compound 17, ED(50) = 129.5 mg/kg and compound 20, ED(50) = 136.7 mg/kg). Protective indexes (PI = TD(50)/ED(50)) ranged from 2.1 (compound 10) to greater than 3.6 (compounds 13, 17 and 20). All four compounds were shown to inhibit hNaV1.2 in a dose dependant manner. Even if a correlation between sodium channel inhibition and anticonvulsant activity was unclear, these studies identify four Na channel antagonists with anticonvulsant activity, providing evidence that these derivatives could be potential drug candidates for development as safe, new and effective antiepileptic drugs (AEDs). (C) 2010 Elsevier Ltd. All rights reserved.
A Practical Synthesis of 2,4(5)-Diarylimidazoles from Simple Building Blocks
A simple and efficient approach to selectively obtain 2,4(5)-diarylimidazoles suppressing formation of 2-aroyl-4(5)-arylimidazoles is described. The yield of each of the two products strongly depends on the reaction conditions employed. This reaction provides a simple method to prepare small libraries of biologically active compounds by parallel synthesis.