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:
Mar. 25, 2014
Filed:
Jan. 14, 2011
Keuk Chan Bang, Incheon-si, KR;
Bum Woo Park, Seoul, KR;
Jong Won Choi, Seoul, KR;
Jae Chul Lee, Suwon-si, KR;
Yong Hoon an, Osan-si, KR;
Young Gil Ahn, Seongnam-si, KR;
Maeng Sup Kim, Seoul, KR;
Keuk Chan Bang, Incheon-si, KR;
Bum Woo Park, Seoul, KR;
Jong Won Choi, Seoul, KR;
Jae Chul Lee, Suwon-si, KR;
Yong Hoon An, Osan-si, KR;
Young Gil Ahn, Seongnam-si, KR;
Maeng Sup Kim, Seoul, KR;
Hanmi Science Co., Ltd, Hwaseong-si, KR;
Abstract
According to the present invention, a method for preparing tetrazole methanesulfonic acid salts comprises an acylation reaction using a novel 4-iodine-4H-chromene-2-carbothionic acid S-benzothiazole-2-yl ester. The method of the present invention can shorten a reaction time and improve safety as compared to conventional methods, and can prepare high-purity tetrazole methanesulfonic acid salts at a high yield rate without using a column chromatography method.