Abstract

An approach to the preparation of 2-mono-, 2,2- and 2,3-disubstituted 1,4-dioxane derivatives is described. The reaction sequence commences from readily available epoxides, in most cases prepared via the Corey–Chaikovsky reaction of the corresponding aldehydes and ketones. The key step of the method is epoxide ring opening with ethylene glycol monosodium salt, followed by further cyclization of the diols obtained. The utility of the approach was demonstrated by multigram preparation of novel functionalized 1,4-dioxanes bearing additional cycloalkane, piperidine or pyrrolidine rings, mostly spirocyclic compounds, which are advanced building blocks for medicinal chemistry.

An approach to the preparation of 2-mono-, 2,2- and 2,3-disubstituted 1,4-dioxane derivatives is described. The reaction sequence commences from readily available epoxides, in most cases prepared via the Corey–Chaikovsky reaction of the corresponding aldehydes and ketones. The key step of the method is epoxide ring opening with ethylene glycol monosodium salt, followed by further cyclization of the diols obtained. The utility of the approach was demonstrated by multigram preparation of novel functionalized 1,4-dioxanes bearing additional cycloalkane, piperidine or pyrrolidine rings, mostly spirocyclic compounds, which are advanced building blocks for medicinal chemistry.

中文翻译：

---

带有附加（杂）脂环的功能化1,4-二恶烷的合成

摘要

描述了一种制备2-单-，2，2-和2，3-二取代的1，4-二恶烷衍生物的方法。反应顺序从容易获得的环氧化物开始，大多数情况下是通过相应醛和酮的Corey-Chaikovsky反应制备的。该方法的关键步骤是用乙二醇单钠盐将环氧化物开环，然后将得到的二醇进一步环化。该方法的实用性通过以克制备新型功能性1,4-二恶烷（带有附加的环烷烃，哌啶或吡咯烷环，主要是螺环化合物）证明，这些化合物是药物化学的高级组成部分。

描述了一种制备2-单-，2，2-和2，3-二取代的1，4-二恶烷衍生物的方法。反应顺序从容易获得的环氧化物开始，大多数情况下是通过相应醛和酮的Corey-Chaikovsky反应制备的。该方法的关键步骤是用乙二醇单钠盐将环氧化物开环，然后将得到的二醇进一步环化。该方法的实用性通过以克制备新型功能性1,4-二恶烷（带有附加的环烷烃，哌啶或吡咯烷环，主要是螺环化合物）证明，这些化合物是药物化学的高级组成部分。