[EN] SYNTHESIS METHODS AND INTERMEDIATES FOR THE MANUFACTURE OF RIZATRIPTAN [FR] PROCEDES DE SYNTHESE ET PRODUITS INTERMEDIAIRES POUR PRODUIRE DU RIZATRIPTAN
[EN] SYNTHESIS METHODS AND INTERMEDIATES FOR THE MANUFACTURE OF RIZATRIPTAN [FR] PROCEDES DE SYNTHESE ET PRODUITS INTERMEDIAIRES POUR PRODUIRE DU RIZATRIPTAN
[EN] SYNTHESIS METHODS AND INTERMEDIATES FOR THE MANUFACTURE OF RIZATRIPTAN<br/>[FR] PROCEDES DE SYNTHESE ET PRODUITS INTERMEDIAIRES POUR PRODUIRE DU RIZATRIPTAN
申请人:RATIOPHARM GMBH
公开号:WO2005075422A1
公开(公告)日:2005-08-18
The invention relates to a process for the manufacture of an 1,2,4-triazol-1-yl compound of the formula [A], or a salt thereof, wherein each of R3 and R4 is hydrogen or lower alkyl, said process comprising reacting a hydrazine compound of the formula [B] wherein R is hydrogen or acyl, R2 is hydrogen or a protecting group, are hydrogen or lower alkyl, and R6 is hydrogen or COOR7, or a salt thereof, with a 1,2,4-triazolyl forming reagent. In addition, novel intermediates for the synthesis of the anti-migraine agent Rizatriptan and methods for their synthesis are presented.