A series of amino- and alkylamino-substituted spirohydantoins of the formula:
and the pharmaceutically acceptable salts thereof; wherein X is oxygen, sulfur or N-R, wherein R is hydrogen or alkyl of 1 to 3 carbon atoms;
R1 is chloro, bromo, fluoro or alkyl of 1 to 3 carbon atoms; one of R2 and R3 is hydrogen; and the other of R2 and R3 is amino, monoalkylamino or dialkylamino, wherein each alkyl group has from 1 to 3 carbon atoms, and pharmaceutically acceptable salts thereof, useful as inhibitors of the enzyme aldose reductase and as therapeutic agents for the treatment of chronic complications associated with diabetes are disclosed. Preferred compounds include 6-chloro-8-amino-spiro[4H-2,3-dihydro-1-benzopyran-4,4'-imidazolidine]-2',5'-dione, the 6-fluoro and 8-methylamino- analogs thereof and the corresponding dihydroben- zothiopyran analogs of these compounds. The optical isomers of these compounds having the 4S-configuration are especially preferred.
一系列式中的
氨基和烷基
氨基取代的螺烷
酮类化合物:
及其药学上可接受的盐;其中 X 是
氧、
硫或 N-R,其中 R 是
氢或 1 至 3 个
碳原子的烷基;
R1 是
氯、
溴、
氟或 1 至 3 个
碳原子的烷基;R2 和 R3 中的一个是
氢;R2 和 R3 中的另一个是
氨基、单烷基
氨基或二烷基
氨基,其中每个烷基有 1 至 3 个
碳原子。优选化合物包括 6-
氯-8-
氨基-螺[4
H-2,3-二
氢-1-
苯并
吡喃-4,4'-
咪唑烷]-2',5'-二
酮、其 6-
氟和 8-
甲基氨基类似物以及这些化合物的相应二
氢苯并
吡喃类似物。这些化合物中具有 4S 构型的光学异构体尤其受到青睐。