There is provided a process for the preparation of a compound of formula II,
wherein R
1
, R
2
, R
3
and R
4
are as described in the description. Such compounds may, for example, be useful intermediates in the synthesis of drugs such as Dronedarone.
提供了一种制备II式化合物的方法,其中R1、R2、R3和R4如描述所述。这些化合物可以作为药物合成
中间体,例如Dronedarone的合成。