Purine or triazolopurine compounds are disclosed represented by formula (I) or (II): ##STR1## wherein R.sup.1 and R.sup.4 represent each hydrogen, halogeno, hydroxy, mercapto, or amino; R.sup.2 represents alkyl or aryl; and R.sup.3 and R.sup.5 represent each hydrogen, alkyl, or aryl; and pharmaceutical compositions comprising these compounds as xanthine oxidase inhibitors, remedies for hyperuricemia, or remedies or preventive agents for gout.
Novel xanthine oxidase inhibitor studies. Part 2. Synthesis and xanthine oxidase inhibitory activities of 2-substituted 6-alkylidenehydrazino- or 6-arylmethylidenehydrazino-7H-purines and 3- and/or 5-substituted 9H-1,2,4-triazolo[3,4-i ]purines
general synthesis of 2-substituted 6-alkylidenehydrazino- or 6-arylmethylidenehydrazino-7H-purines and 3- and/or 5-substituted 9H-1,2,4-triazolo[3,4-i]purines, which were obtained by oxidative cyclisation of the corresponding 6-aldehyde hydrazones of 7H-purine, as a new class of potential xanthine oxidaseinhibitors are reported. Their inhibitory activities against bovine milk xanthine oxidase in vitro
2-取代的6-亚烷基萘并肼基或6-芳基亚甲基肼基并氨基7 H-嘌呤和3-和/或5-取代的9 H -1,2,4-三唑并[3,4- -i ]嘌呤的简便且通用的合成方法,据报道,它们是通过相应的7 H-嘌呤的6-醛的氧化环化而获得的,作为新型潜在的黄嘌呤氧化酶抑制剂。还研究了它们在体外对牛黄嘌呤氧化酶的抑制活性,一些嘌呤2和6和三唑并呋喃酮7的活性比别嘌呤醇高出几倍到几百倍。