Document Report Card

ID: ALA2203133

Journal: J Med Chem

Title: Discovery of 3-alkoxyamino-5-(pyridin-2-ylamino)pyrazine-2-carbonitriles as selective, orally bioavailable CHK1 inhibitors.

Authors: Lainchbury M, Matthews TP, McHardy T, Boxall KJ, Walton MI, Eve PD, Hayes A, Valenti MR, de Haven Brandon AK, Box G, Aherne GW, Reader JC, Raynaud FI, Eccles SA, Garrett MD, Collins I.

Abstract: Inhibitors of checkpoint kinase 1 (CHK1) are of current interest as potential antitumor agents, but the most advanced inhibitor series reported to date are not orally bioavailable. A novel series of potent and orally bioavailable 3-alkoxyamino-5-(pyridin-2-ylamino)pyrazine-2-carbonitrile CHK1 inhibitors was generated by hybridization of two lead scaffolds derived from fragment-based drug design and optimized for CHK1 potency and high selectivity using a cell-based assay cascade. Efficient in vivo pharmacokinetic assessment was used to identify compounds with prolonged exposure following oral dosing. The optimized compound (CCT244747) was a potent and highly selective CHK1 inhibitor, which modulated the DNA damage response pathway in human tumor xenografts and showed antitumor activity in combination with genotoxic chemotherapies and as a single agent.

CiteXplore: 23082860

DOI: 10.1021/jm3012933