The present invention is directed to quinazolinone compounds which are antagonists of T-type calcium channels, and which are useful in the treatment or prevention of disorders and diseases in which T-type calcium channels are involved. The invention is also directed to pharmaceutical compositions comprising these compounds and the use of these compounds and compositions in the prevention or treatment of such diseases in which T-type calcium channels are involved.
The present invention is directed to quinazolinone compounds of the formula I:
wherein R1, R2, R3, X1, X2 X3 are defined herein. These compounds are antagonists of T-type calcium channels, and are useful in the treatment or prevention of disorders and diseases in which T-type calcium channels are involved. The invention is also directed to pharmaceutical compositions comprising these compounds and the use of these compounds and compositions in the prevention or treatment of such diseases in which T-type calcium channels are involved.
Discovery and expanded SAR of 4,4-disubstituted quinazolin-2-ones as potent T-type calcium channel antagonists
作者:Kelly-Ann S. Schlegel、Zhi-Qiang Yang、Thomas S. Reger、Youheng Shu、Rowena Cube、Kenneth E. Rittle、Phung Bondiskey、Mark G. Bock、George D. Hartman、Cuyue Tang、Jeanine Ballard、Yuhsin Kuo、Thomayant Prueksaritanont、Cindy E. Nuss、Scott M. Doran、Steven V. Fox、Susan L. Garson、Richard L. Kraus、Yuxing Li、Victor N. Uebele、John J. Renger、James C. Barrow
DOI:10.1016/j.bmcl.2010.07.010
日期:2010.9
The discovery and synthesis of 4,4-disubstituted quinazolinones as T-type calcium channel antagonists is reported. Based on lead compounds 2 and 3, a focused SAR campaign driven by the optimization of potency, metabolic stability, and pharmacokinetic profile identified 45 as a potent T-type Ca2+ channel antagonist with minimized PXR activation. In vivo, 45 suppressed seizure frequency in a rat model of absence epilepsy and showed significant alterations of sleep architecture after oral dosing to rats as measured by EEG. (C) 2010 Elsevier Ltd. All rights reserved.