Process for the preparation of compounds of formula I
1
wherein the general symbols are as defined in claim
1,
which process comprises reacting a compound of formula V
2
wherein the general symbols are as defined in claim
1,
with carbon monoxide in the presence of a catalyst.
制备式I1化合物的过程,其中一般符号的定义如权利要求书1所述,该过程包括在催化剂存在下将式V2化合物与
一氧化碳反应。