AMINOTETRALONE DERIVATIVES AND PROCESS FOR PRODUCING THE SAME

摘要

The present invention pertains to a process for the preparation of Compound (4) through the below-described reaction route: <CHEM> wherein R<1> and R<2> 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.