Novel 4-(substituted thiazolyl) -3-hydroxy-3-pyrroline -2,5-diones and processes for preparing them are disclosed. The novel compounds have the structure
wherein
n is 0 to 2;
m is 0 to 3;
R1, R2 and R3 are independently hydrogen, halogen, loweralkyl having 1 to 6 carbons, trifluoromethyl, and loweralkoxy having 1 to 6 carbons or pharmaceutically acceptable salts thereof, with the proviso that the substituents on the thiazolyl ring are not adjacent. They inhibit glycolic acid oxidase and thus are useful in the treatment and prevention of calcium oxalate renal lithiasis.
本发明公开了新型 4-(取代的
噻唑基)-3-羟基-
3-吡咯啉-2,5-二酮及其制备工艺。 新型化合物具有如下结构:n 为 0 至 2;m 为 0 至 3;R1、R2 和 R3 独立地为氢、卤素、具有 1 至 6 个碳原子的低级烷基、三
氟甲基和具有 1 至 6 个碳原子的低级烷氧基或其药学上可接受的盐,但
噻唑环上的取代基不相邻。 它们能抑制
乙醇酸氧化酶,因此可用于治疗和预防
草酸钙肾性结石。