公开(公告)号：US11597705B2

公开(公告)日：2023-03-07

申请号：US17568840

申请日：2022-01-05

Applicant: DAEGU CATHOLIC UNIVERSITY INDUSTRY ACADEMIC COOPERATION FOUNDATION

Inventor： Dong Wook Kang ,  Jong Yun Jang ,  Seong Jeong Lee ,  Jeong In Kim ,  Ju Yeon Bae ,  Hyeon Ho Jeon ,  Hee Yoon Ryu

IPC: C07D257/04

Abstract: The present invention provides a method for producing high-purity 5-methyl-1H-tetrazole in high yield.

公开(公告)号：US11591305B2

公开(公告)日：2023-02-28

申请号：US17570420

申请日：2022-01-07

Applicant: DAEGU CATHOLIC UNIVERSITY INDUSTRY ACADEMIC COOPERATION FOUNDATION

Inventor： Dong Wook Kang ,  Min Gi Chu ,  Seok Ju Lee ,  Eun Jung Lee

IPC: C07D311/32

Abstract: The present invention provides a method for producing fisetin or fisetin derivatives, which is capable of mass production. The method for producing fisetin or fisetin derivatives according to the present invention is capable of mass-producing fisetin or fisetin derivatives without a purification process such as a column chromatography process.

公开(公告)号：US11987496B2

公开(公告)日：2024-05-21

申请号：US17274539

申请日：2019-09-04

Applicant: DAEGU CATHOLIC UNIVERSITY INDUSTRY ACADEMIC COOPERATION FOUNDATION

Inventor： Sang Ryul Lee ,  Kyoung Chol Kim ,  Ja Young Park ,  Ji Hyeong Kim ,  Jeong In Kim ,  Seok Ju Lee ,  Jongyun Jang ,  Seongjeong Lee ,  Mingi Chu ,  Dong Wook Kang

IPC: C01B21/086 ,  C01B21/093

CPC classification number: C01B21/086 ,  C01B21/093

Abstract: A method for producing a bis(fluorosulfonyl)imide lithium salt is disclosed. The method includes the steps of: (a) reacting bis(chlorosulfonyl)imide with NH4F(HF)n (n=0-10) to prepare ammonium bis(fluorosulfonyl)imide; and (b) reacting the ammonium bis(fluorosulfonyl)imide with a lithium base, wherein in at least one of steps (a) and (b), after the reaction, a process of adding an alkoxy trialkyl silane to the reaction solution to remove a fluorine anion is performed.