Antiinflammatory agents which are excellent in pharmacological effects and exhibit selective COX-2 inhibiting activity leading to an expectation of reduction in the adverse effects such as gastric mucosal disturbances. Compounds of general formula (I) have excellent antiinflammatory activity, and exhibit potent inhibitory action against COX-2 induced at an inflamed site with little inhibitory action against COX-1 always present in the stomach, kidney and so on, (wherein R1 is hydrogen or halogeno; R2 and R3 are each hydrogen, halogeno, lower alkyl, lower alkoxy, hydroxyl or lower alkanoyloxy; R4 is halogenated lower alkyl or lower alkyl; X is sulfur, oxygen or NH; and Y is lower alkylthio, lower alkylsulfonyl or sulfamoyl). Accordingly, drugs containing the compounds are useful as antiinflammatory agents reduced in the adverse effects such as gastric mucosal disturbances by virtue of the selective inhibitory activity of the compounds against COX-2.
抗炎剂具有卓越的药理作用,并具有选择性 COX-2 抑制活性,有望减少胃黏膜紊乱等不良反应。通式(I)化合物具有优异的抗炎活性,对发炎部位诱导的 COX-2 具有强效抑制作用,而对始终存在于胃、肾等部位的 COX-1 几乎没有抑制作用;R2和R3分别是氢、卤素、低级烷基、低级烷氧基、羟基或低级烷酰氧基;R4是卤代低级烷基或低级烷基;X是
硫、氧或NH;Y是低级烷
硫基、低级烷磺酰基或
氨基磺酰基)。因此,含有这些化合物的药物可作为消炎药使用,由于这些化合物对 COX-2 的选择性抑制活性,可减少胃黏膜紊乱等不良反应。