A process for the preparation of compounds of formula (I)
1
in which
R
1
, R
2
, R
3
and n are defined as indicated in the description, use of said compounds as intermediates for the preparation of estrogen derivatives as well as the intermediates of this process.
一种制备式(I)1化合物的方法,其中R1、R2、R3和n的定义如描述中所示,所述化合物的用途为
雌激素衍
生物的中间体,以及该过程的中间体。