An Efficient, Direct Bis-ortho-chlorination of 4-(Difluoromethoxy)aniline and Its Application to the Synthesis of BMS-665053, a Potent and Selective Pyrazinone-Containing Corticotropin-Releasing Factor-1 Receptor Antagonist
摘要:
An efficient scale-up synthesis of (S)-5-chloro-1-(1-cyclopropylethyl)-3-(2,6-dichloro-4-(difluoromethoxy)phenylamino)-pyrazin-2(1H)-one, 1 (BMS-665053), is described. This new process features a one-step direct bis-orthochlorination of 4-(difluoromethoxy)aniline with HCl and H2O2, and a palladium-catalyzed coupling of 2,6-dichloro-4-(difluoromethoxy)aniline 2 and (S)-3,5-dichloro-1-(1-cyclopropylethyl)pyrazin-2(1H)-one 3. The process was applied to the preparation of batches of 1 for preclinical toxicology studies.
In Vitro Intrinsic Clearance-Based Optimization of <i>N</i><sup>3</sup>-Phenylpyrazinones as Corticotropin-Releasing Factor-1 (CRF<sub>1</sub>) Receptor Antagonists
作者:Richard A. Hartz、Vijay T. Ahuja、Maria Rafalski、William D. Schmitz、Allison B. Brenner、Derek J. Denhart、Jonathan L. Ditta、Jeffrey A. Deskus、Eddy W. Yue、Argyrios G. Arvanitis、Snjezana Lelas、Yu-Wen Li、Thaddeus F. Molski、Harvey Wong、James E. Grace、Kimberley A. Lentz、Jianqing Li、Nicholas J. Lodge、Robert Zaczek、Andrew P. Combs、Richard E. Olson、Ronald J. Mattson、Joanne J. Bronson、John E. Macor
DOI:10.1021/jm900302q
日期:2009.7.23
identified as potent and orally active corticotropin-releasingfactor-1 (CRF1) receptorantagonists. Selected compounds proved efficacious in an anxiety model in rats; however, pharmacokinetic properties were not optimal. In this article, we describe an in vitrointrinsicclearance-based approach to the optimization of pyrazinone-based CRF1receptorantagonists wherein sites of metabolism were identified