| abstract |
Compounds of the formula (I) n n n in which X 1 =H or F, X 2 =H or F, and Y=Cl, Br or I, are prepared by reacting, in a solvent or solvent mixture at a temperature below −60° C., a halobenzene of the formula (II) with an organic lithium compound and then with a formyl equivalent of the formula (III) n n n and may be used as starting materials for preparing agrochemicals, electronic materials and pharmaceuticals. |