申请人:Sumitomo Chemical Company, Limited
公开号:US03950526A1
公开(公告)日:1976-04-13
Quinazoline derivatives represented by the formula ##SPC1## Wherein R.sub.1 and R.sub.2 are individually a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxy group, a nitro group, a lower alkylthio group or a lower alkylsulfonyl group; R.sub.3 is a hydrogen atom, a lower alkyl group, a lower cycloalkyl group, a napthyl group, a furyl group or a thienyl group; R.sub.4 is a lower cycloalkyl group or a trihalomethyl group; and n is an integer of 1 to 3, are novel compounds and have excellent pharmacological properties, particularly as anti-inflammatory and analgesic effects with low toxicity. They can be prepared by treating with ammonia a trihaloacetamidophenylketone derivative of the formula, ##SPC2## Wherein R.sub.1, R.sub.2 and R.sub.3 are as defined above; R is a hydrogen atom or a group of the formula --C.sub.n H.sub.2n --R.sub.4 ; and X is a halogen atom.
喹唑啉衍生物由以下公式表示:##SPC1## 其中R.sub.1和R.sub.2分别为氢原子、卤素原子、较低的烷基基团、较低的烷氧基团、硝基团、较低的烷基硫基团或较低的烷基磺酰基团;R.sub.3为氢原子、较低的烷基基团、较低的环烷基基团、萘基团、呋喃基团或噻吩基团;R.sub.4为较低的环烷基基团或三卤甲基基团;n为1至3的整数,是新颖的化合物,具有出色的药理特性,特别是作为抗炎和镇痛药效,毒性低。它们可以通过用氨处理以下公式的三卤乙酰胺基苯酮衍生物来制备,##SPC2## 其中R.sub.1、R.sub.2和R.sub.3如上定义;R为氢原子或公式--C.sub.n H.sub.2n --R.sub.4的基团;X为卤素原子。