申请人:Rao Dharmaraj Ramachandra
公开号:US20120220778A1
公开(公告)日:2012-08-30
The present invention relates to a process for preparing naratriptan or a salt thereof, the process comprising: (a) reacting a compound of formula (3) with a compound of the formula HCCR
wherein Z is a protecting group, Y is a leaving group and R is a trialkyl silyl group, a trialkylstannyl group or a zinc (II) halide, to obtain the compound of formula (4); (b) converting the compound of formula (4) to a compound of formula (5)
wherein Z′ is hydrogen or a benzyl group; (c) converting the compound of formula (5) to naratriptan; and (d) optionally converting naratriptan to a salt thereof. The present invention also provides novel compounds (3) and (4) and processes for their preparation.
本发明涉及一种制备纳拉替普坦或其盐的方法,该方法包括:(a)将式(3)的化合物与式HCCR的化合物反应,其中Z是保护基,Y是离去基团,R是三烷基硅基,三烷基锡基或锌(II)卤化物,以获得式(4)的化合物;(b)将式(4)的化合物转化为式(5)的化合物,其中Z'是氢或苄基;(c)将式(5)的化合物转化为纳拉替普坦;以及(d)可选地将纳拉替普坦转化为其盐。本发明还提供了新型化合物(3)和(4)以及其制备方法。