公开(公告)号：US20240228461A1

公开(公告)日：2024-07-11

申请号：US18555233

申请日：2022-04-14

Applicant: LG CHEM, LTD.

Inventor： Sung Wook KIM ,  Ki Dae KIM ,  Soo Min LEE ,  Doo Sup SHIN

IPC: C07D401/12 ,  C07D231/56

CPC classification number: C07D401/12 ,  C07D231/56

Abstract: The present invention relates to a novel method for preparing a compound of chemical Formula 7, or a salt thereof, which is disclosed in the present specification and can be effectively used as a sphingosine-1-phosphate receptor agonist.

公开(公告)号：US20240317716A1

公开(公告)日：2024-09-26

申请号：US18575570

申请日：2022-07-01

Applicant: LG CHEM, LTD.

Inventor： Seok Ju LEE ,  Hui Rak JEONG ,  Jin Ok HAM ,  Doo Sup SHIN

IPC: C07D403/04

CPC classification number: C07D403/04

Abstract: The present invention relates to a method for preparing a xanthine oxidase inhibitor and, more specifically, to a method for preparing a compound of chemical formula 2 by using ester hydrolysis and a recrystallization method.