Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
METHOD FOR MANUFACTURING 4-(TRIFLUOROMETHOXY)BENZYL CYANIDE
Document Type and Number:
Japanese Patent JP2004182663
Kind Code:
A
Abstract:

To provide an industrially effective manufacturing method for 4-(trifluoromethoxy)benzyl cyanide, whereby bis(chloromethyl) ether remaining in a solution after the completion of reaction is perfectly removed to an undetectable level, preventing the decomposition of produced 4-(trifluoromethoxy)benzyl chloride; and trifluoromethoxybenzene is easily recovered without producing a waste solvent.

The method for manufacturing 4-(trifluoromethoxy)benzyl cyanide comprises chloromethylating trifluoromethoxybenzene of formula (2), removing by-produced bis(chloromethyl) ether by treating an aqueous ammonium chloride solution after the completion of the chloromethylation to obtain 4-(trifluoromethoxy)benzyl chloride of formula (3), and then subjecting 4-(trifluoromethoxy)benzyl chloride to a cyanation to give 4-(trifluoromethoxy)benzyl cyanide of formula (1). Preferably, no organic solvent is used in the treatment during the reaction and after the completion of the reaction in both the chloromethylation and the cyanation.


Inventors:
MIYASHIGE RYOZO
ETO SUGIO
NAKAMOTO YASUSHI
Application Number:
JP2002000352735
Publication Date:
July 02, 2004
Filing Date:
December 04, 2002
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
TOYO KASEI KOGYO CO LTD
UBE INDUSTRIES
International Classes:
C07C253/14; C07B61/00; C07C255/37; (IPC1-7): C07C253/14; C07C255/37
Attorney, Agent or Firm:
倉内 義朗