| 摘要 |
The invention relates to a process for manufacturing the compound of formula I
wherein R is H, (C 1 -C 6 )alkyl or benzyl, or a salt thereof, said process comprising the reaction of the compound of formula I-1
wherein X is bromine, chlorine or fluorine, with the compound of formula I-2
wherein R is H, (C 1 -C 6 )alkyl or benzyl, or a salt of said compound of formula I-2, in the presence of tetra-n-butyl ammonium fluoride hydrate and of a base. The invention further relates to the compound of formula I-1 and uses thereof. |
