CHEMICAL PROCESS

摘要

Process for preparing the (E &cir& _)-isomer of a compound (II) by contacting the (E &cir& _)- or (Z &cir& _)-isomer of the 2-methylphenyl precursor, or a mixture of both, with bromine in an inert organic solvent, in the presence of a polymeric base and light. The product of the process is useful as a chemical intermediate in the manufacture of fungicides such as those described in EP 370629.