| abstract |
- 51 The invention relates to a process for manufacturing the compound of formula I 0 \1 r110 R O O Br Br 5 wherein R is H, (C-C6 )alkyl or benzyl. or a salt thereof, said process comprising the reaction of the compound of formula 1-1 Br NN O Br I-1 wherein X is Br, Cl or F, or a salt thereof, with the compound of formula 1-2 o o 1-2 wherein R is H, (CI-C6 )alkyl or benzyl, or a salt thereof, in the presence of a base, and, when X is Br or Cl, in the presence of tetra-n-butyl ammonium fluoride hydrate or cesium 10 fluoride. The invention further relates to the compound of formula I-I and uses thereof. |