A novel synthesis of 1,4- and 1,5-dioxepan-2-one lactones was achieved through the regioselective oxidation of 3-(2-hydroxyethoxy)propan-1-ol. Under basic conditions, when 3-(2-hydroxyethoxy)propan-1-ol was oxidized using oxoammonium salts, a quantitative oxidative esterification was observed, resulting in a regioselective lactone ring closure. This oxidation was tailored to afford 1,4-dioxepan-2-one in very good yield.
通过对 3-(2-羟乙氧基)丙-1-醇进行区域选择性氧化,实现了 1,4- 和 1,5-
二氧杂环庚烷-2-酮内酯的新型合成。在碱性条件下,当使用氧化
铵盐氧化 3-(2-羟乙氧基)丙-1-醇时,观察到了定量氧化酯化反应,从而产生了具有区域选择性的内酯闭环。通过对这种氧化反应进行调整,可以得到收率非常高的 1,4-
二氧杂环庚烷-2-酮。