申请人:DAIICHI PHARMACEUTICAL CO., LTD.
公开号:EP0811603A1
公开(公告)日:1997-12-10
The present invention pertains to a process for the preparation of Compound (4) through the below-described reaction route:
wherein R1 and R2 each represents H, halogen, OH or C1-6 alkyl group; X and Y each represents a protected amino group and n stands for 0 to 4.
According to the above process, an aminotetralone derivative which is an intermediate useful for an industrial preparation of a camptothecin derivative can be obtained in a convenient manner and in a high yield.
本发明涉及通过下述反应路线制备化合物 (4) 的工艺:
其中 R1 和 R2 分别代表 H、卤素、OH 或 C1-6 烷基;X 和 Y 分别代表受保护的氨基;n 代表 0 至 4。
根据上述工艺,可以方便、高产地获得一种氨基四氢萘酮衍生物,它是一种用于工业制备喜树碱衍生物的中间体。