A general method is described for the preparation of methyl- and dimethyl-cyclobutanes from simple 1,3-diols. The key steps of the procedure are a phase transfer catalysed ring closure and the transformation of a carboxyl group to a methyl group. Phase transfer catalysis provides good yields in the synthesis of the cyclobutane skeleton.

中文翻译：

---

相转移催化从简单的1,3-二醇合成甲基和二甲基环丁烷

描述了由简单的1，3-二醇制备甲基和二甲基环丁烷的通用方法。该方法的关键步骤是相转移催化的闭环和羧基向甲基的转化。相转移催化在环丁烷骨架的合成中提供了良好的产率。