RESUMO
Structure-activity relationships for inhibition of erbB1, erbB2, and erbB4 were determined for a series of quinazoline- and pyrido[3,4-d]pyrimidine-based analogues of the irreversible pan-erbB inhibitor, canertinib. Cyclic amine bearing crotonamides were determined to provide rapid inhibition of cellular erbB1 autophosphorylation and good metabolic stability in liver microsome and hepatocyte assays. The influence of 4-anilino substitution on pan-erbB inhibitory potency was investigated. Several anilines were identified as providing potent, reversible pan-erbB inhibition. Optimum 4- and 6-substituents with known 7-substituents provided preferred irreversible inhibitors for pharmacodynamic testing in vivo. Quinazoline 54 and pyrido[3,4-d]pyrimidine 71 were identified as clearly superior to canertinib. Both compounds possess a piperidinyl crotonamide Michael acceptor and a 3-chloro-4-fluoroaniline, indicating these as optimized 6- and 4-substituents, respectively. Pharmacokinetic comparison of compounds 54 and 71 across three species selected compound 54 as the preferred candidate. Compound 54 (PF-00299804) has been assigned the nomenclature of dacomitinib and is currently under clinical evaluation.
Assuntos
Antineoplásicos/química , Receptores ErbB/antagonistas & inibidores , Morfolinas/química , Piridinas/química , Pirimidinas/química , Quinazolinas/química , Quinazolinonas/química , Administração Oral , Animais , Antineoplásicos/síntese química , Antineoplásicos/farmacocinética , Antineoplásicos/farmacologia , Cães , Xenoenxertos , Humanos , Injeções Intravenosas , Macaca fascicularis , Masculino , Camundongos Nus , Morfolinas/síntese química , Morfolinas/farmacocinética , Morfolinas/farmacologia , Transplante de Neoplasias , Fosforilação , Piridinas/síntese química , Piridinas/farmacocinética , Piridinas/farmacologia , Pirimidinas/síntese química , Pirimidinas/farmacocinética , Pirimidinas/farmacologia , Quinazolinas/síntese química , Quinazolinas/farmacocinética , Quinazolinas/farmacologia , Quinazolinonas/síntese química , Quinazolinonas/farmacocinética , Quinazolinonas/farmacologia , Ratos Sprague-Dawley , Estereoisomerismo , Relação Estrutura-AtividadeRESUMO
Pyrrolo[3,4-c]carbazoles bearing solubilising basic side chains at the 8-position retain potent Wee1 and Chk1 inhibitory properties in isolated enzyme assays, and evidence of G2/M checkpoint abrogation in several cellular assays. Co-crystal structure studies confirm that the primary binding to the Wee1 enzyme is as described previously, with the C-8 side chains residing in an area of bulk tolerance.