An investigation into the cyclization of acyl radicals with mono- and disubstituted β-alkoxyacrylates is described. Ether-tethered acyl radicals, generated directly from the corresponding aldehyde, undergo cyclization to form dioxaspiro heterocyclic systems including 1,7-dioxaspiro[4,4]nonane-4,8-dione and 1,8-dioxaspiro[5,4]decane-5,9-dione. This strategy is applied to a concise formal synthesis of the fungal metabolite longianone. Density functional theory calculations provide insight into the chemistry of the acyl radicals in this study.
本文介绍了酰基与单取代和二取代 β-烷氧基丙烯酸酯环化的研究。由相应的醛直接生成的醚系酰基经过环化形成二氧杂螺杂环系统,包括 1,7-dioxaspiro[4,4]nonane-4,8-dione 和 1,8-dioxaspiro[5,4]decane-5,9-dione 。这一策略被应用于真菌代谢物长链酮的简明正式合成。密度泛函理论计算深入揭示了本研究中酰基的化学性质。