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:
Jul. 11, 2017
Filed:
Aug. 26, 2014
Nissan Chemical Industries, Ltd., Tokyo, JP;
Shouichi Tateyama, Funabashi, JP;
Shinya Naitou, Funabashi, JP;
Yasutaka Takada, Funabashi, JP;
Mariko Ishida, Funabashi, JP;
Hirohide Kitsuyama, Funabashi, JP;
NISSAN CHEMICAL INDUSTRIES, LTD., Tokyo, JP;
Abstract
The object of the present invention is to provide a method for producing in high yield with high stereoselectivity an optically active 5-hydroxy-3-ketoester compound which is useful as an intermediate for a pharmaceutical. A novel method for producing an optically active 5-hydroxy-3-ketoester compound in which an asymmetric aldol reaction by use of 1,3-diene compound is carried out in the presence of an optically active binaphthol-titanium complex together with a substituted nitrogen-containing 5 or 6-membered aromatic heterocyclic compound to obtain an optically active 5-hydroxy-3-ketoester compound in high yield with high stereoselectivity; and a novel production intermediate having a crystalline form.