A range of 3-oxybenzamide compounds and related quinazolinone compounds are disclosed which can act as potent inhibitors of the DNA repair enzyme poly(ADP-ribose) polymerase or PARP enzyme (EC 2.4.2.30), and which thereby can provide useful therapeutic compounds for use in conjunction with DNA-damaging cytotoxic drugs or radiotherapy to potentiate the effects of the latter. The compounds disclosed include 3-benzyloxybenzamides, 3-oxybenzamides in which a chain of 5 or more methylene groups terminate in a halogen atom or in a purin-9-yl moiety, certain benzoxazole-4-carboxamide compounds and certain quinazolinone compounds. In formula X and Y together may form a bride --X--Y-- that represents the grouping (a), (b) or (c )wherein R.sup.5 is H, alkyl, aryl or aralkyl.
揭示了一系列3-
氧苯甲
酰胺化合物和相关的
喹唑啉酮化合物,它们可以作为DNA修复酶聚(
ADP-
核糖)聚合酶或
PARP酶(
EC 2.4.2.30)的有效
抑制剂,并且因此可以提供用于与损伤DNA的细胞毒性药物或放疗结合使用以增强后者效果的有用治疗化合物。所披露的化合物包括3-苄
氧基
苯甲
酰胺、3-
氧基
苯甲
酰胺,其中5个或更多亚
甲基基团的链以卤原子或
吡嗪-9-基团结尾,某些
苯并
噁唑-4-甲
酰胺化合物和某些
喹唑啉酮化合物。在公式X和Y中,X和Y一起可以形成代表基团(a)、(b)或(c)的桥--X--Y--,其中R.sup.5为H、烷基、芳基或芳基烷基。