盐酸苯海索的合成工艺改进
2016-07-25朱占元黄东
朱占元 黄东



[摘要] 目的 通过优化工艺,提高盐酸苯海索生产安全性和产品收率。 方法 用金属镁和氯代环己烷制备格氏试剂,再与中间体盐酸哌啶苯丙酮发生加成反应,最后加盐酸水解得到盐酸苯海索,本研究采用单一因素法深入讨论了原料配比、溶剂用量、格氏反应温度、格氏反应时间对产物收率的影响。 结果 经过工艺参数优化,盐酸苯海索的收率由之前的30%左右提高到了50%以上。 结论 原工艺经过优化后,生产较为安全,减少了原料的损失,提高了粗品的收率,为工业化生产奠定了基础。
[关键词] 格氏反应;优化;收率
[中图分类号] TQ463 [文献标识码] A [文章编号] 2095-0616(2016)09-53-03
[Abstract] Objective To improve the production safety and increase the product yield of benzhexol hydrochloride by process optimization. Methods Firstly, preparing grignard reagent with magnesium and chlorocyclohexane; then adding piperidylpropiophenone hydrochloride to carry out the additive reaction; finally, adding hydrochloric acid, by its hydrolyzing, we get the benzhexol hydrochloride. In this paper, the effects of raw material ratio, solvent dosage, grignard reaction temperature and grignard reaction time on the product yield were in-depth discussed with the single-factor method. Results By process optimization, the product yield of benzhexol hydrochloride increased from 30% to more than 50%. Conclusion The process optimization improves the production safety, reduces the loss of raw materials, and raises the raw product yield, which therefore lays the foundation for industrial production.
[Key words] Grignard reaction; Optimization; Product yield
盐酸苯海索(trihexyphenidyl hydrochloride )又名安坦,化学名为1-环己基-1-苯基-3-哌啶基-1-丙醇盐酸盐,为中枢抗胆碱药 ,可选择性阻断纹状体的胆碱能神经通路,利于恢复帕金森病患者脑内多巴胺和乙酰胆碱的平衡,改善患者症状[1-3]。纯品为白色轻质结晶性粉末;无臭,味微苦,接触后有刺痛麻痹感。在甲醇、乙醇或三氯甲烷中溶解,在水中微溶。
盐酸苯海索目前通用的合成路径以苯乙酮为原料,与甲醛、盐酸哌啶在乙醇中进行曼尼希反应得到盐酸哌啶苯丙酮,再与氯代环已烷、镁屑进行格氏加成、水解反应而得到。其中盐酸哌啶苯丙酮的制备,工艺较为稳定、合理;合成盐酸苯海索关键是合成格氏试剂,格氏试剂是有机金属化合物中最重要的一类化合物,也是有机合成上非常重要的试剂之一[4-11]。格氏试剂选用的溶剂主……
