New antiinflammatory agents. 2. 5-Phenyl-3H-imidazo[4,5-c][1,8]naphthyridin-4(5H)-ones: a new class of nonsteroidal antiinflammatory agents with potent activity like glucocorticoids
作者:Fumio Suzuki、Takeshi Kuroda、Tadafumi Tamura、Soichiro Sato、Kenji Ohmori、Shunji Ichikawa
DOI:10.1021/jm00093a020
日期:1992.7
We previously described new antiinflammatory agents, 4-hydroxy-2-oxo-1-phenyl-1H-1,8-naphthyridine-3-carboxamides 1. Further modification of the compounds bearing 1-phenyl-1,8-naphthyridin-2-one as a mother skeleton led to 5-phenylimidazo[4,5-c][1,8]naphthyridin-4(5H)-one derivatives 2 and 3. Regioselective synthesis of these compounds bearing a substituent at the 1- or 3-position was conducted according
我们之前曾描述过新的抗炎药4-羟基-2-氧代-1-苯基-1H-1,8-萘啶-3-羧酰胺1。进一步修饰带有1-苯基-1,8-萘啶-2-的化合物一个作为母体骨架,生成5-苯基咪唑并[4,5-c] [1,8]萘啶-4(5H)-一衍生物2和3。这些化合物在1-或3-处带有取代基的区域选择性合成根据方案I和II中所示的方法进行位置测定。在这一系列化合物中,抗炎活性受到咪唑上取代基的位置和性质的极大影响。3-烷基或3-苄基取代导致有效的活性,但没有1-取代。苄基的微小修饰降低或消除了活性。详细检查结构活性关系导致了3-苄基-5-苯基-3H-咪唑[4,5-c] [1,8]萘啶-4(5H)-一(22),在角叉菜胶,酵母聚糖和逆转的被动Arthus反应诱导的大鼠爪水肿中表现出有效的口服抗炎活性(ED40 = 5.3,0.37 mg / kg,ED50 = 0.47毫克/公斤)。22的这种广泛活性类似于糖皮质