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. 11, 2012
Filed:
Aug. 04, 2008
Young Ho Moon, Suwon-si, KR;
Moon Sub Lee, Bucheon-si, KR;
Jae Ho Yoo, Osan-si, KR;
Ji Sook Kim, Gyeonggi-do, KR;
Han Kyong Kim, Yongin-si, KR;
Chang Ju Choi, Seoul, KR;
Young Kil Chang, Seoul, KR;
Gwan Sun Lee, Seoul, KR;
Young Ho Moon, Suwon-si, KR;
Moon Sub Lee, Bucheon-si, KR;
Jae Ho Yoo, Osan-si, KR;
Ji Sook Kim, Gyeonggi-do, KR;
Han Kyong Kim, Yongin-si, KR;
Chang Ju Choi, Seoul, KR;
Young Kil Chang, Seoul, KR;
Gwan Sun Lee, Seoul, KR;
Hanmi Science, Hwaseong-si, KR;
Abstract
Optically pure voriconazole can be prepared in a high yield by a) subjecting 1-(2,4-difluorophenyl)-2(1H-1,2,4-triazol-1-yl)ethanone to Reformatsky-type coupling reaction with a substituted thiopyrimidine derivative to obtain a desired (2R,3S)/(2S,3R)-enantiomeric pair; b) removing the thiol derivative from the enantiomer to obtain racemic voriconazole; and c) isolating the racemic voriconazole by way of optical resolution using an optically active acid.