abstract |
A compound of the formula (VIII) wherein each X is independently H or F; and R is selected from hydrogen, halogen, cyano, methyl, cyanomethyl, fluoromethyl, difluoromethyl, trifluoromethyl and -Si[(1-4C)alkyl]3; and processes for preparing a compound of formula (VIII) by bromination of a compound of the formula (VII), |