present interesting potential as synthetic intermediates and as unusual motifs for incorporation into biologically active compounds. Here, an efficient synthesis of functionalized 1,4-dioxenes is achieved in two steps. Using keto-diazo compounds, a ruthenium catalyzed O–H insertion with β-halohydrins followed by treatment with base results in cyclization with excellent selectivity, through O-alkylation
1,4-二恶烯作为合成中间体和掺入
生物活性化合物的不寻常基序,具有令人感兴趣的潜力。在此,分两个步骤实现了官能化的
1,4-二恶英的有效合成。使用酮重氮化合物,
钌通过β-卤代醇催化O–H插入,然后用碱处理,可以通过酮-烯酸酯的O-烷基化,以优异的选择性实现环化反应。重氮组分中的多种卤代醇和阴离子稳定基团是可以耐受的,从而提供了新型的官能化二恶烯。富含对映体的β-
溴代醇可提供富含对映体的1,4-二恶烯。