| 摘要 |
The present invention relates to a process for the preparation of compoun ds of Formula (I), wherein R1 is 1,3-dimethyl-butyl, 1,3,3-trimethyl-butyl o r a group A1, wherein R3, R4 and R5 are each independently of the others hyd rogen or C1-C4alkyl; and R2 is hydrogen; or R1 and R2 together from the grou p A2, wherein R6 and R7 are each independently of the other hydrogen or C1-C 4alkyl; or R1 and R2 together from the group A3, wherein R8 and R9 are each independently of the other hydrogen or C1-C4alkyl; wherein a compound of For mula (II) wherein R1 and R2 are as defined for formula I and X is bromine or chlorine, is reacted with ammonia in the presence of a base and a catalytic amount of at least one palladium complex compound, wherein the palladium co mplex compound comprises at least one ferrocenyl-biphosphine ligand.
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