There is provided a process for the preparation of a compound of formula I, which process comprises: (a) reaction of a compound of formula II, HO-D-NH
2
II with a compound of formula III, followed by (b) reaction of the intermediate of formula IV thereby formed, IV with base and a compound of formula V, R
2
S(O)
2
L
2
V, wherein the intermediate of formula IV is not isolated, and wherein D, R
1
, R
2
, L
1
and L
2
have meanings given in the description.
提供了一种制备式I化合物的方法,该方法包括:(a)将式II化合物HO-D-NH2II与式III化合物反应,然后(b)将由此形成的式IV中间体与碱和式V化合物R2S(O)2
L2V反应,其中不分离式IV中间体,D、R1、R2、L1和
L2的含义如描述中所给。