Process for the production of substituted toluene compounds
申请人:Ciba-Geigy AG
公开号:US04165268A1
公开(公告)日:1979-08-21
A process for the production of benzal bromides which contain an electrophilic substituent in the ortho- and/or para-position of the formula (Ia), or of mixtures thereof with the corresponding benzyl bromides of the formula (Ib), ##STR1## IN WHICH R represents an electrophilic substituent in the ortho- and/or para position, by treating correspondingly substituted toluenes with elementary bromine under irradiation with visible light in a two-phase system which consists of an aqueous and an organic phase, which process comprises carrying out the reaction in the presence of a base.
Process for the production of substituted benzal and benzyl bromides
申请人:Ciba-Geigy Aktiengesellschaft
公开号:US04191621A1
公开(公告)日:1980-03-04
The invention describes a process for the production of benzal or benzyl bromides which contain electrophilic substituents in the ortho- and/or para-position, or mixtures thereof, by the side-chain bromination of correspondingly substituted toluene, which comprises introducing elementary chlorine, under irradiation with visible light, into a two-phase system consisting of an aqueous phase and an organic phase and containing a correspondingly substituted toluene, at least one metal bromide, and a base, and also the compounds obtained by this process.