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. 10, 1997
Filed:
Aug. 14, 1996
Applicant:
Inventors:
Peter Andres, Leichlingen, DE;
Albrecht Marhold, Leverkusen, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
549434 ; 549436 ;
Abstract
2,2-Difluorobenzo[1.3]dioxole-carbaldehydes are prepared in a particularly advantageous manner if methylbenzo[1.3]dioxoles are chlorinated, the resulting dichloromethyl-2,2-dichlorobenzo[1.3]dioxole is fluorinated with hydrogen fluoride and the dichloromethyl-2,2-difluorobenzo[1.3]dioxole obtained by this procedure is reacted with a carboxylic acid.