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:
May. 20, 2003
Filed:
Aug. 23, 2002
Jae Won Yoo, Seoul, KR;
Duck Hee Kim, Seoul, KR;
Seong Joon Moon, Kyunggi-do, KR;
Min Soo Noh, Seoul, KR;
Soo Hyun Kim, Seoul, KR;
Su Sun An, Seoul, KR;
Jin Seon Lee, Kyunggi-do, KR;
Pacific Corporation, Seoul, KR;
Abstract
The present invention provides a menthol derivative represented by the following Formula 1 and a method for preparing the menthol derivative. The menthol derivative represented by the Formula 1 is prepared by reacting menthol and phosphorous oxychloride with an equivalence ratio of 1:1˜1.3 in an organic solvent in the presence of organic base to obtain dichloro[5-methyl-2(mehtylethyl)cylclohexyloxy]phosphino-1-one; and reacting above obtained dichloro[5-methyl-2(mehtylethyl)cylclohexyloxy]phosphino-1-one with 3-amino propanol in the organic solvent in the presence of the organic; then hydrolyzing and crystallizing the product with polar organic solvent.