Copper(I) Iodide Catalyzed [3 + 3] Annulation of Iodonium Ylides with Pyridinium 1,4-Zwitterionic Thiolates for the Synthesis of 1,4-Oxathiin Scaffolds
作者:Àlex Díaz-Jiménez、Stuart C. D. Kennington、Anna Roglans、Anna Pla-Quintana
DOI:10.1021/acs.orglett.3c01538
日期:2023.7.7
assemble the 1,4-oxathiin core through a [3 + 3] annulation. The optimal annulation partner has been found to be the iodonium ylide of the cyclic 1,3-diketones. The developed protocol allows the synthesis of a variety of bicyclic 1,4-oxathiin derivatives under very mild conditions under copper(I) iodide catalysis. Access to benzoannulated 1,4-oxathiins has been achieved through iodine-mediated aromatization
1,4-恶硫因核的选择性组装已被视为一种强大的策略,可以获取具有非常有趣特性的分子中存在的支架。在这项研究中,利用吡啶鎓 1,4-两性离子硫醇盐的变色龙样反应性通过 [3 + 3] 环组装 1,4-恶硫苷核心。已发现最佳环化配偶体是环状 1,3-二酮的碘鎓叶立德。所开发的方案允许在碘化亚铜 (I) 催化下在非常温和的条件下合成各种双环 1,4-氧硫因衍生物。通过对最初获得的双环化合物进行碘介导的芳构化,获得了苯并环化的 1,4-氧噻啶。