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:
Oct. 10, 2006
Filed:
Feb. 28, 2002
Applicants:
Tetsuya Ikemoto, Osaka, JP;
Wei-guo Gao, Osaka, JP;
Masami Igi, Osaka, JP;
Inventors:
Assignee:
Sumitomo Chemical Company Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 307/78 (2006.01);
U.S. Cl.
CPC ...
Abstract
A compound of formula [V] is prepared by oxidizing a compound of formula [III]. Citalopram can be industrially and economically produced and at a high yield by converting a compound of formula [V], which is prepared from a compound of formula [III], to a compound of formula [VI], and then alkylating the compound of formula [VI] to form citalopram.