PURPOSE: A novel intermediate for preparing high purity aripiprazole and a method for preparing the same are provided to obtain a large amount of high purity aripiprazole.CONSTITUTION: A method for preparing a carbostyril derivative of chemical formula 6 comprises: a step of reacting 7-hydroxy-3,4-dihydrocarbostyril of chemical formula 2 and 4-halobutane acetate of chemical formula 3 under the presence of a base and a solvent to prepare 7-(4-acetoxybutoxy)-3,4-dihydrocarbostyril of chemical formula 4 a step of reacting 7-(4-acetoxybutoxy)-3,4-dihydrocarbostyril of chemical formula 4 with a base under the presence of a solvent to prepare 7-(4-hydroxybutoxy)-3,4-dihydrocarbostyril of chemical formula 5 and a step of preparing the carbostyril derivative from 7-(4-hydroxybutoxy)-3,4-dihydrocarbostyril of chemical formula 5.COPYRIGHT KIPO 2013본 발명은 아리피프라졸의 제조에 유용한 신규 중간체, 이의 제조방법 및 이를 이용한 아리피프라졸의 제조방법을 제공한다. 상기의 제조방법은 고순도 및 고수율의 아리피프라졸을 제조할 수 있으며, 대량생산에 적합하다.
