The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 18, 2007
Filed:
Mar. 06, 2004
Gyo-hyun Hwang, Daejeon, KR;
Yeong-dae Kim, Daejeon, KR;
Hyun Nam, Seoul, KR;
Jay-hyok Chang, Daejeon, KR;
Hyun-ik Shin, Daejeon, KR;
Young-keun Kim, Daejeon, KR;
Kyung Hee Lee, Kyongsangbuk-do, KR;
Jae Sung Lee, Kyongsangbuk-do, KR;
Gyo-Hyun Hwang, Daejeon, KR;
Yeong-Dae Kim, Daejeon, KR;
Hyun Nam, Seoul, KR;
Jay-Hyok Chang, Daejeon, KR;
Hyun-Ik Shin, Daejeon, KR;
Young-Keun Kim, Daejeon, KR;
Kyung Hee Lee, Kyongsangbuk-do, KR;
Jae Sung Lee, Kyongsangbuk-do, KR;
LG Life Sciences Ltd., Seoul, KR;
Abstract
The present invention relates to a process for the preparation of 4-aminomethyl-3-alkoxyiminopyrrolidine methane-sulfonate, a key intermediate of quinolone antibiotics. According to the process of the present invention, the total number of steps has been shortened to 2-3 steps, the solid separation is not required, and the use of costly chemicals, particularly (BOC)O (t-butoxycarbonyl anhydride), several organic solvents and reactants, is eliminated.