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:
Jun. 22, 2004
Filed:
Feb. 25, 2003
Klaus Nussbaum, Wehr, DE;
Martina Hoffmann, Hausen, DE;
Ciba Specialty Chemicals Corporation, Tarrytown, NY (US);
Abstract
There is described the preparation of phenylphenol compounds of formula ( ) by reaction of a keto compound of formula ( ) with dioxolane of formula ( ) and with an ammonium compound of formula ( ) to from &bgr;-aminoketone compound of formula ( ) (reaction step (I)), reaction of the compound of formula ( ) with a compound of formula ( ) to form a compound of formula ( ) (reaction step (II)), and subsequent alkylation to form a compound of formula ( ) (reaction step (III)) in accordance with scheme (A); wherein R , R , R , R and R are each independently of the others hydrogen or C -C alkyl; R , R and R are each independently of the others hydrogen or C -C alkyl; ant Hal is a halogen atom. The compounds prepared in accordance with the invention are suitable as antimicrobial active substances.