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托非索泮的合成工艺

Practical synthesis of tofisopam

  • 摘要: 对托非索泮( 1 )的合成工艺进行了研究。以异丁香酚甲醚( 2 )为起始原料,依次通过聚合、氧化得到3-[2-(3,4-二甲氧基苯甲酰基)-4,5-二甲氧基苯基]-戊-2-酮( 3 )(收率56%),再与水合肼反应(收率87%)得到托非索泮( 1 ),总收率48%。中间体和目标产物经1H NMR、13C NMR、ESI-MS表征。所研制的合成工艺路线具有原料稳定易得、反应条件温和、工艺过程简便易控以及产率较高等优点,预期能满足工业化生产的要求。

     

    Abstract: This paper deals with the development of a practical process for tofisopam( 1 ). The target product 1 was synthesized from commercially available isoeugenenyl methyl ether( 2 )in a two-step process with an overall yield of 48% via polymerization, oxidation(56% yield)and cyclization with Hydrazine hydrate(87% yield). The intermediates and the target product were characterized by 1H NMR, 13C NMR and ESI-MS. This synthetic process of tofisopam is featured with robustness, high yielding in almost every step, ease of operation, as well as green chemistry, and thus should be amenable to large-scale production.

     

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