申请人:ratiopharm GmbH
公开号:US07786156B2
公开(公告)日:2010-08-31
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.
本发明涉及一种制备公式[A]的1,2,4-三唑-1-基化合物或其盐的方法,其中R3和R4中的每一个是氢或低碳基,该方法包括将公式[B]的肼化合物与1,2,4-三唑基形成试剂反应,其中R为氢或酰基,R2为氢或保护基,R5和R6为氢或低碳基,R7为氢或COOR7,或其盐。此外,本发明还提供了用于合成抗偏头痛药利扎替普坦的新中间体以及其合成方法。