Title:
PRODUCTION OF ORTHOBROMOPHENOLS
Document Type and Number:
Japanese Patent JP3774919
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To selectively, efficiently and inexpensively provide a method for producing the subject compound useful as an intermediate for medicines and agrochemicals, capable of readily purifying by carrying out transalkylation reaction of brominated 4-cumenylphenol with an aromatic hydrocarbon.
SOLUTION: (B) 2-Bromo-4-cumenylphenol or 2,6-dibromo-4-cumenylphenol obtained by brominating 4-cumenylphenol in the presence of (A) a Friedel-Crafts catalyst such as aluminum chloride or iron chloride is reacted with (C) an aromatic hydrocarbon such as (chloro)benzene, toluene, xylene, mesitylene, naphthalene, e.g. at 0-150°C, especially 20-100°C to carry out transalkylation to provide the objective 2-bromophenol or 2,6-dibromophenol. Furthermore, the components A and C are each preferably used in amounts of 0.1-2mol and 1-10mol based on 1mol component B.
More Like This:
| WO/2006/053135 | DESULFURIZATION AND NOVEL PROCESS FOR SAME |
| JPH0248538 | METHOD FOR GAS PHASE HYDROFLUORINATION |
| JPH01224356 | PRODUCTION OF SULFONYLUREA DERIVATIVE |
Inventors:
Hiroaki Tenma
Shinichi Soga
Hisao Eguchi
Shinichi Soga
Hisao Eguchi
Application Number:
JP32314595A
Publication Date:
May 17, 2006
Filing Date:
December 12, 1995
Export Citation:
Assignee:
Tosoh Corporation
International Classes:
B01J27/125; C07C39/27; C07B61/00; C07C37/48; C07C37/50; (IPC1-7): C07C39/27; B01J27/125; C07C37/48; C07C37/50; //C07B61/00
Domestic Patent References:
| JP5663934A | ||||
| JP1207253A |
Previous Patent: EMISSION CONTROL DEVICE FOR AUTOMOBILE
Next Patent: HEATER MECHANISM FOR APPARATUS FOR PULLING UP SINGLE CRYSTAL
Next Patent: HEATER MECHANISM FOR APPARATUS FOR PULLING UP SINGLE CRYSTAL