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:
Sep. 12, 2000
Filed:
Dec. 06, 1999
Applicant:
Inventors:
Michael C Savidakis, Niagara Falls, NY (US);
Michael J Fifolt, Grand Island, NY (US);
Daniel R Thielen, Snyder, NY (US);
Ronald Spohn, Getzville, NY (US);
David C Johnson, Cheektowaga, NY (US);
William S Derwin, Grand Island, NY (US);
Assignee:
Occidental Chemical Corporation, Dallas, TX (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
560103 ; 558425 ; 568323 ; 568656 ; 570206 ; 570207 ; 570210 ;
Abstract
Disclosed is a method of adding 1 to 4 chlorine or bromine atoms to an aromatic ring of compound that has at least one electron-withdrawing groups on that ring. The aromatic compound is reacted with a chlorinating agent or a brominating agent in the presence of about 0.1 to about 10 mole % of a Lewis acid catalyst and about 0.001 to about 0.1 equivalents of an iodine-containing cocatalyst at a temperature of ambient to about 100.degree. C.