| 摘要 |
PURPOSE:To produce a p-halogenated bromobenzene, in high selectivity, in an industrial scale, by brominating a halogenated benzene using a small amount of a Y type zeolite in the absence of solvent, at a temperature within a specific range. CONSTITUTION:A halogenated benzene is brominated in the presence of a Y type zeolite to obtain a p-halogenated bromobenzene. The bromination is carried out by mixing 1mol of the halogenated benzene with 0.01-10g of a Y type zeolite in the absence of solvent, introducing a brominating agent, and reacting at a temperature above 60 deg.C and below the boiling point of the reaction mixture, preferably <=200, especially <=100 deg.C. USE:Raw material for the production of pharmaceuticals, agricultural chemicals, etc. |
