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:
Jul. 10, 2007
Filed:
Dec. 15, 2004
Applicants:
Kinji Kato, Okayama, JP;
Junya Nishiuchi, Okayama, JP;
Mitsuharu Kitamura, Okayama, JP;
Inventors:
Assignee:
Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07C 45/49 (2006.01);
U.S. Cl.
CPC ...
Abstract
In the production method of the invention, a halogen-substituted aromatic compound is reacted with carbon monoxide in the presence of hydrogen fluoride and boron trifluoride into a corresponding halogen-substituted aromatic aldehyde. By the use of hydrogen fluoride and boron trifluoride, the para position to halogen atom is selectively formylated to provide the halogen-substituted aromatic aldehyde in high yields in a short reaction time even at temperatures lower than room temperature.