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:
Apr. 14, 1992
Filed:
Apr. 12, 1990
Applicant:
Inventors:
Hideyuki Akieda, Omuta, JP;
Naoki Sato, Omuta, JP;
Koichi Morinaga, Omuta, JP;
Yoshinori Ide, Omuta, JP;
Ryuichi Mita, Omuta, JP;
Mitsumasa Umemoto, Omuta, JP;
Assignee:
Mitsui Toatsu Chemicals, Incorporated, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
568655 ; 568 33 ; 568 51 ; 568 55 ; 568306 ; 568337 ; 568442 ; 568587 ; 568588 ; 568637 ; 568643 ; 568649 ; 558413 ; 558415 ; 558416 ; 558419 ; 558423 ; 558424 ; 560 11 ; 560 12 ; 560 13 ; 560 18 ; 560 21 ; 560 22 ; 560 23 ; 560 42 ;
Abstract
A higher yield of the difluorohalomethoxybenzene produced by the reaction of a metal phenolate with dibromodifluoromethane or bromochlorodifluoromethane can be obtained by conducting the addition of a metal alcoholate or a metal hydride as a reaction initiator to a solution or a suspension of an aprotic polar solvent containing the metal phenolate and dibromodifluoromethane or bromochlorodifluoromethane.