公开(公告)号：US20240317685A1

公开(公告)日：2024-09-26

申请号：US18575630

申请日：2022-07-01

Applicant: LG CHEM, LTD.

Inventor： Seok Ju LEE ,  Ah Byeol PARK ,  Ju Yeol LEE ,  Ki Dae KIM ,  Hui Rak JEONG

IPC: C07D209/42 ,  C07D403/04

CPC classification number: C07D209/42 ,  C07D403/04

Abstract: The present invention relates to a method for preparing an intermediate for synthesis of a xanthine oxidase inhibitor and, more specifically, to a method for preparing compounds of chemical formulas 2 and 4 by using low-priced starting materials and ligands and employing chelating extraction and purification techniques.