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:
Apr. 27, 2004
Filed:
Jan. 03, 2002
Applicant:
Inventors:
Runpu Shen, Zhejiang, CN;
Shiqing Pi, Zhejiang, CN;
Bin Xie, Zhejiang, CN;
Hongjun Huang, Zhejiang, CN;
Assignee:
Zhejiang Medicine Co., Ltd., Xinchang Pharmaceutical Factory, Zhejiang, CN;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 6/702 ;
U.S. Cl.
CPC ...
C07C 6/702 ;
Abstract
The invention relates to a process for producing all trans-vitamin A ester (I). According to the present invention, vitamin A ester (I) can simply be synthesized in good yields and high purity by the reaction of phosphonate compound (IV) with aldehyde (II) in an organic solvent in the presence of a base.