This invention relates to novel processes for the manufacture of spiro-linked pyrrolidine-2,5-diones of the formula;
which have 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.
本发明涉及制造式中螺环
吡咯烷-2,5-二酮的新工艺;
其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。
所发明的工艺是一种改进的、方便的大规模生产方法。