申请人:Farmos-Yhtyma Oy
公开号:EP0129383A1
公开(公告)日:1984-12-27
he invention provides novel compounds of formula
in which R is isobutyryloxy and salts thereof, processes for making it and a new process forthe preparation oftherapeuti- cally active 3,4-di-isobutyryloxy-N-methyl- phenethylamine (I)
and its acid addition salts. According to the process 3,4-dimethoxyphenethylamine is reacted with benzaldehyde and formaldehyde in the presence of hydrogen and a catalyst to give a compound of formula (II)
The compound (II) is demethyiated to give
and then reacted with isobutyryl chloride in the presence of a base to give a compound of formula IV
from which the benzyl protecting group is removed by catalytical hydrogenation whereby compound (l) is obtained.
本发明提供了式
其中 R 为异丁酰氧基的新型化合物及其盐类、其制造工艺以及制备具有治疗活性的 3,4-二异丁酰氧基-N-甲基-苯乙胺 (I) 的新工艺。
及其酸加成盐的新工艺。根据该工艺,3,4-二甲氧基苯乙胺在氢气和催化剂存在下与苯甲醛和甲醛反应,得到式 (II) 化合物
将化合物 (II) 脱甲基得到
然后在碱存在下与异丁酰氯反应,得到式 IV 的化合物
通过催化氢化作用除去其中的苄基保护基,得到化合物 (l)。