| 摘要 |
<p>1. Process for the preparation of benzene compounds which are trifluoromethylated directly on the aromatic nucleus, by reaction of a carbon tetrahalide, hydrofluoric acid and a Lewis acid catalyst with a benzene derivative, characterized in that the benzene derivative is a dihalogenobenzene or trihalogenobenzene, the halogens being entirely or partially replaceable by halogenoalkoxy or perhalogenothioalkyl groups, and in that the Lewis acid is boron trifluoride used at an absolute pressure of at least 1 bar.</p> |
