abstract |
Process for the preparation of compounds of Formula I (See formula I) in which R1, R2, R3, R4, R5 and R6 have the meanings indicated in claim 1, which comprises the reaction of a compound of Formula II (See formula II) in which R1, R2, R3, R4 have the meanings indicated above, with a compound of Formula III (See formula III) in which R5, R6 has the meanings indicated above. |