| abstract |
According to the invention, compounds of the formula III in which R 3 is an unsubstituted or substituted heteroaromatic 6-membered ring and a, R4 and R5 independently of one another are hydrogen, C 1 -C 4 -alkyl, C 1 -C 4 -alkoxy or halogeno-C 1 -C 3 -alkyl, prepared in such a way that a compound of the formula XI is reacted with a compound of the formula (rIII) wherein R3, R4 and R5 are as defined above and Q is an ordinary leaving group. Formulas (III) and (rIII) |