The invention relates to an improved process for the preparation of a macrocyclic compound of formula I
1
wherein R
1
, R
2
, R
3
, A and D have the meaning given in the claims; by a ring closure metathesis of the corresponding diene of formula III
2
wherein R
1
, R
2
, R
3
, A and D′ have the meaning given in the claims; in the presence of a benzylidene ruthenium catalyst, wherein the phenyl group is substituted by a nitro group.
本发明涉及一种改进的制备公式I1的大环化合物的方法,其中R1、R2、R3、A和D具有所述权利要求中给出的含义;通过相应的二烯烃III2的环闭合交换反应,其中R1、R2、R3、A和D'具有所述权利要求中给出的含义;在苯甲
酰亚胺基
钌催化剂的存在下进行,其中苯基被硝基取代。