Discovery and SAR of orally efficacious tetrahydropyridopyridazinone PARP inhibitors for the treatment of cancer
摘要:
PARP-1, the most abundant member of the PARP superfamily of nuclear enzymes, has emerged as a promising molecular target in the past decade particularly for the treatment of cancer. A number of PARP-1 inhibitors, including veliparab discovered at Abbott, have advanced into different stages of clinical trials. Herein we describe the development of a new tetrahydropyridopyridazinone series of PARP-1 inhibitors. Many compounds in this class, such as 20w, displayed excellent potency against the PARP-1 enzyme with a K-i value of < 1 nM and an EC50 value of 1 nM in a C41 whole cell assay. The presence of the NH in the tetrahydropyridyl ring of the tetrahydropyridopyridazinone scaffold improved the pharmacokinetic properties over similar carbon based analogs. Compounds 8c and 20u are orally available, and have demonstrated significant efficacy in a B16 murine xenograft model, potentiating the efficacy of temozolomide (TMZ). (C) 2012 Elsevier Ltd. All rights reserved.
A compound selected from the group consisting of 1-(2-fluoro-5-((4-oxo-3,4,5,6,7,8-hexahydrophthalazin-1-yl)methyl)phenyl)pyrrolidine-2,5-dione and 4-(3-(1,4-diazepan-1-ylcarbonyl)-4-fluorobenzyl)-5,6,7,8-tetrahydrophthalazin-1(2H)-one, or a pharmaceutically acceptable salt thereof, for use in treating leukemia, colon cancer, glioblastomas, lymphomas, melanomas, carcinomas of the breast or cervical carcinomas in a mammal by administering thereto a therapeutically acceptable amount of said compound.
[EN] INHIBITORS OF POLY(ADP-RIBOSE)POLYMERASE<br/>[FR] INHIBITEURS DE LA POLY(ADP-RIBOSE)POLYMÉRASE
申请人:ABBOTT LAB
公开号:WO2008083027A1
公开(公告)日:2008-07-10
[EN] Inhibitors of poly(ADP-ribose)polymerase, ways to make them and methods of treating patients using them are disclosed. [FR] La présente invention concerne des inhibiteurs de la poly(ADP-ribose)polymérase, des procédés de fabrication de ces inhibiteurs et des méthodes de traitement de patients utilisant ces inhibiteurs.