Title:
PREPARATION OF DIFLUOROMETHOXYARENE AND DIFLUOROMETHYLTHIOARENE
Document Type and Number:
Japanese Patent JP3310459
Kind Code:
B2
Abstract:
PURPOSE: To provide a new method for preparation of difluoromethoxyarene and difluoromethyothioarene.
CONSTITUTION: When hydroxyarene or mercaptoarene of formula I [Ar is optionally substd. aryl; Q is oxygen or sulfur] is reacted with chlorodifluoromethane in the presence of alkali, the reaction is carried out in the presence of a phase transfer catalyst based on tetrasubstd. ammonium salt or phosphonium salt and of a solvent selected from aliphat. or non-aliphat. hydrocarbons, arom. hydrocarbons and alkyl ethers, to obtain difluoromethoxyarene or difluoromethylthioarene of formula II [Ar and Q are the same as in formula I].
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Inventors:
Klaus-Helmut Michelle
Application Number:
JP12802994A
Publication Date:
August 05, 2002
Filing Date:
May 19, 1994
Export Citation:
Assignee:
Bayer Aktiengesellschaft
International Classes:
B01J31/02; C07B41/04; C07B45/06; C07B61/00; C07C41/16; C07C43/225; C07C45/64; C07C45/71; C07C49/84; C07C201/12; C07C205/37; C07C319/14; B01J23/02; C07C323/09; C07C323/22; (IPC1-7): C07C43/225; B01J23/02; B01J31/02; C07C41/16; C07C45/64; C07C49/84; C07C201/12; C07C205/37; C07C319/14; C07C323/09; C07C323/22
Domestic Patent References:
| JP4356439A | ||||
| JP5959640A | ||||
| JP6306005A | ||||
| JP59157041A |
Attorney, Agent or Firm:
Heikichi Odashima