| abstract |
The present invention relates to a process for preparing 2,2'-bis(halomethyl)-1,1'-binaphthyl, by reacting 2,2'-dimethyl-1,1'-binaphthyl in the presence of a solvent with a halogenating agent under the action of light having a wavelength of from 10-5 to 10-8 m in the presence or absence of a free-radical former at from -10 to 120°C. |