2-Isopropyl-2-(2-methylphenyl)-5-(N-methylhomoveratrylamino)-valeronitrile ("mepamil") of the Formula I: ##STR1## preferably administered in the form of water-soluble acid addition salts such as e.g. hydrochloride. The claimed compound is advantageously prepared by alkylation of 2-(2-methylphenyl)-3-methylbutyronitrile with 3,3-diethoxypropylchloride. Subsequently, the obtained 5,5-diethoxy-2-isopropyl-2-(2-Methylphenyl)-valeronitrile is mildly, acidically hydrolisized to yield the appropriate aldehye, i.e. 2-isopropyl-2-(2-methylphenyl)-5-oxovaleronitrile. This aldehyde is then reacted with N-methylhomoveratrylamine under conditions of reductive alkylation, suitably by catalytic hydrogenation over a platinum or palladium catalyst or by chemical reduction with the use of formic acid as a reducing agent. The resulting base is optionally converted by neutralization with a pharmaceutically acceptable organic or inorganic acid, i.e. hydrochloric or fumaric acid, into the corresponding acid addition salt.
化合物2-异丙基-2-(2-甲基苯基)-5-(N-甲基同香豆醇基)-
戊腈(“mepamil”)的
化学式为I:##STR1## 最好以
水溶性酸盐的形式(例如盐酸盐)进行给药。所述化合物优选通过将2-(2-甲基苯基)-3-甲基
丁腈与3,3-二乙氧基丙基
氯化物烷基化制备而得。随后,所得的5,5-二乙氧基-2-异丙基-2-(2-甲基苯基)-
戊腈被轻微的酸性
水解以得到适当的醛,即2-异丙基-2-(2-甲基苯基)-5-氧代
戊腈。然后,在还原烷基化的条件下,将该醛与N-甲基同香豆醇胺反应,适宜地通过
铂或
钯催化氢化或使用
甲酸作为还原剂的
化学还原反应。所得到的碱可以通过与药学上可接受的有机或
无机酸(如
盐酸或
富马酸)中和而选择性地转化为相应的酸盐。