A process for the preparation of 1-pyridyl-alkyl-4-aryl piperazines, in the racemic form, of the formula ##STR1## in which: the pyridine ring is alpha-, beta-, or gamma-substituted; R=H; C.sub.n H.sub.2n+1, n being in the range from 1 to 4; R'=H, halogen, CH.sub.3, OCH.sub.3, in which process: (a) pyridine aldehyde is reacted between -5.degree. C. and 0.degree. C. with (CH.sub.3).sub.2 S=CH.sub.2 ; (b) the oxirane so obtained is treated with an arylpiperazine; (c) the hydroxyl derivative obtained in (b), after salification with alkaline hydrides or hydrates in a solvent medium is treated with alkylating agents, and the separation of the compounds so obtained into the respective optical antipodes.
一种制备1-
吡啶基-4-芳基
哌嗪的方法,其为外消旋体,
化学式为##STR1##其中:
吡啶环为α-,β-或γ-取代基;R=H;C.sub.n H.sub.2n+1,其中n在1至4的范围内;R'=H,卤素,CH.sub.3,OCH.sub.3,在该过程中:(a)
吡啶醛在-5℃至0℃之间与(CH.sub.3).sub.2S=CH.sub.2反应;(b)所得的
环氧化物与芳基
哌嗪反应;(c)在溶剂介质中,将(b)中得到的羟基衍
生物与碱性
氢化物或
水合物盐化后,用烷基化剂进行处理,并将所得化合物分离为各自的光学对映体。