This invention relates to novel processes for the manufacture of spiro-linked pyrrolidine-2,5-diones of formula;
which have a potent inhibitory activity on aldose reductase and are useful for reduction and prevention of chronic diabetic complications.
The invented processes are useful as improved and convenient method for a large scale manufacture.
本发明涉及制造式螺环
吡咯烷-2,5-二酮的新工艺;该工艺对醛糖还原酶具有强效抑制活性,可用于减少和预防慢性糖尿病并发症。 所发明的工艺可作为改进的、方便的大规模制造方法。