Synthesis and SAR optimization of quinazolin-4(3H)-ones as poly(ADP-ribose)polymerase-1 inhibitors
摘要:
We have demonstrated that quinazolin-4(3H)-one, a nicotinamide (NI) mimic with PARP-1 inhibitory activity in the high micromolar range (IC50 = 5.75 mu M) could be transformed into highly active derivatives with only marginal increase in molecular weight. Convenient one to two synthetic steps allowed us to explore extensive SAR at the 2-, and 5- through 8-positions of the quinazolin-4(3H)-one scaffold. Substitutions at the 2- and 8-positions were found to be most favorable for improved PARP-1 inhibition. The amino group at 8-position resulted in compound 22 with an IC50 value of 0.76 mu M. Combination of the 8-amino substituent with an additional methyl substituent at the 2-position provided the most potent compound 31 [8-amino-2-methylquinazolin-4(3H)-one, IC50 = 0.4 mu M] in the present study. Compound 31 inhibited the proliferation of Brca1-deficient cells with an IC50 value of 49.0 mu M and displayed >10-fold selectivity over wild type counterparts. Binding models of these derivatives within the active site of PARP-1 have further supported the SAR data and will be useful for future lead optimization efforts. (C) 2012 Elsevier Masson SAS. All rights reserved.
A compound of formula I
wherein A, X, Y, Z, R
1
and R
24
are described herein. The compounds are useful as inhibitors of potassium channel function and in the treatment and prevention of arrhythmia, I
Kur
-associated disorders, and other disorders mediated by ion channel function.
A compound of formula I
wherein A, X, Y, Z, R1 and R24 are described herein. The compounds are useful as inhibitors of potassium channel function and in the treatment and prevention of arrhythmia, IKur-associated disorders, and other disorders mediated by ion channel function.
式 I 的化合物
其中 A、X、Y、Z、R1 和 R24 如本文所述。这些化合物可作为钾离子通道功能的抑制剂,用于治疗和预防心律失常、IKur 相关性疾病和其他由离子通道功能介导的疾病。
[EN] NITRIC OXIDE-RELEASING PRODRUG MOLECULE<br/>[FR] MOLÉCULE DE PROMÉDICAMENT LIBÉRANT DE L'OXYDE NITRIQUE<br/>[ZH] 可释放一氧化氮的前药分子