Friedel Crafts reaction of itaconic anhydride (III) with 2,4-difluorobiphenyl (II) afforded unsaturated acid IV which was hydrogenated to give 4-(2',4'-difluorobiphenyl-4-yl)-2-methyl-4-oxobutanoic acid (I). A series of functional derivatives and salts of the acid I has been prepared. The antiinflammatory effect of these compounds was compared with that of acid I using selected experimental inflammation models. The analgesic activity in the intraperitoneal irritation test was also evaluated. In the case of (R)-(+)-1-phenylethylamide Vf the ratio of the diastereoisomers was determined by HPLC.
用2,4-二氟联苯(II)对顺丁烯二酸酐(III)进行费德尔-克拉夫茨反应,得到不饱和酸(IV),经氢化后得到4-(2',4'-二氟联苯-4-基)-2-甲基-4-氧代丁酸(I)。制备了一系列酸I的功能衍生物和盐,并将这些化合物的抗炎效果与酸I进行了比较,使用选择性实验性炎症模型评估了它们的镇痛活性。在对(R)-(+)-1-苯乙酰胺Vf中,通过HPLC测定了对映异构体的比例。