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:
Aug. 08, 2017
Filed:
Nov. 24, 2011
Hyunil Lee, Gyeonggi-do, KR;
Heungsik Yoon, Gyeonggi-do, KR;
Young Hee Lee, Gyeonggi-do, KR;
Heejung Jung, Gyeonggi-do, KR;
Young-kook Koh, Gyeonggi-do, KR;
Hyunil Lee, Gyeonggi-do, KR;
Heungsik Yoon, Gyeonggi-do, KR;
Young Hee Lee, Gyeonggi-do, KR;
Heejung Jung, Gyeonggi-do, KR;
Young-Kook Koh, Gyeonggi-do, KR;
Aminologics Co., Ltd., Seoul, KR;
Abstract
The present invention relates to a method for preparing enantiomerically pure compounds 1a and 1b of the following formula 1 from racemic compound 1 of the following formula 1. [formula 1] The compounds 1a and 1b of the above formula 1 respectively are important intermediates for a process for preparing the respective compounds 2a and 2b of the following formula 2, which are 2,2'-binaphthol-3-aldehyde derivatives. The following compounds 2a and 2b are useful for preparing enantiomerically pure amino acids. The present invention provides a method for preparing the above compounds 1a and 1b very conveniently and economically, and suitably for mass production. [formula 2]