Title:
PRODUCTION OF 2-CHLORO-4-TRIFLUOROMETHYLBENZAL CHLORIDE
Document Type and Number:
Japanese Patent JP3164284
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To readily and efficiently obtain 2-chloro-4-trifluoromethylbenzal chloride which is useful as a synthetic intermediate for medicines, agrochemicals and a variety of functional material by chlorination of trifuloromethylbenzal chloride.
SOLUTION: In the presence of a Lewis acid catalyst, (A) 4- trifluoromethylbenzal chloride is allowed to react with (B) chlorine to give (C) 2-chloro-4-trifluoromethylbenzal chloride. Addition of iodine to the reaction system increases its reaction rate and is recommended. The amount of the Lewis acid catalyst is preferably 0.005-0.1 equivalent, preferably 0.01-0.05 equivalent per 1 equivalent of the component A. The component A is readily prepared by using p-xylene as a starting substance.
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Inventors:
Masatomi Kanai
Toshikazu Kawai
Toshikazu Kawai
Application Number:
JP7179196A
Publication Date:
May 08, 2001
Filing Date:
March 27, 1996
Export Citation:
Assignee:
Central Glass Co., Ltd.
International Classes:
B01J27/128; C07B61/00; C07C17/12; C07C25/13; (IPC1-7): C07C17/12; C07C25/13
Other References:
【文献】米国特許4367348(US,A)
Attorney, Agent or Firm:
Yoshiyuki Nishi