abstract |
A process for the preparation of compounds of formula I n n nwherein the general symbols are as defined in claim 1, which comprises reacting a compound of formula V n n nwherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 and R 18 are as defined in claim 1, and R 18 is especially nitro, chlorine or bromine, with an azide compound of formula IX, n n nwherein M and n are as defined in claim 1, especially with sodium azide. |