[EN] PROCESS FOR PREPARATION OF 4-ARYL-NICOTINAMIDE DERIVATIVES<br/>[FR] PROCEDE DE PREPARATION DE DERIVES DE 4-ARYL-NICOTINAMIDE
申请人:HOFFMANN LA ROCHE
公开号:WO2005014549A1
公开(公告)日:2005-02-17
The present invention relates to a process for the manufacture of compounds of general formula wherein the substituents are as described in claim I characterized in that it comprises the steps of a) reacting a compound of formula (X), with a compound of formula (Xiii), to a compound of formula (XIVa), (XIV),b) converting the OH/=O function of compounds of formula XIV/XlVa into a leaving group P with a reagent containing a leaving group, selected from the group comprising POCl3, PBr3, Mel or (F3CS02)2O to form a compound of formula (XV), wherein P is halogen or trifluoromethanesulfonate, c) substituting the leaving group P by R2 with HR2 to form a compound of formula (XVI) d) hydrolyzing the nitrile function in an acidic medium comprising H2SO4, HCI or acetic acid, to a compound of formula (I)The compouds of formula I are valuable intermediate for the manufacture of therapeutically active compounds which have NK- I antagonist activity.