ZnI<sub>2</sub>/Zn(OTf)<sub>2</sub>-TsOH: a versatile combined-acid system for catalytic intramolecular hydrofunctionalization and polyene cyclization
作者:Ting-Hung Chou、Bo-Hung Yu、Rong-Jie Chein
DOI:10.1039/c9cc07242j
日期:——
combined-acid system using a zinc(II) salt [ZnI2 or Zn(OTf)2] and p-toluene sulfonic acid (TsOH) was investigated for catalytic cationic cyclizations, including intramolecular hydrocarboxylation, hydroalkoxylation, hydroamination, hydroamidation, hydroarylation and polyene cyclizations. This reaction provides easy access to five- and six-membered O- and N-containing saturated heterocyclic compounds, tetrahydronaphthalene
研究了使用锌(II)盐[ZnI 2或Zn(OTf)2 ]和对甲苯磺酸(TsOH)的温和高效的联合酸体系,用于催化阳离子环化,包括分子内加氢羧基化,加氢烷氧基化,加氢胺化,加氢酰胺化,氢芳基化和多烯环化。该反应可轻松获得五元和六元含O和N的饱和杂环化合物,四氢萘衍生物和多环骨架,并具有良好的马尔可夫尼可夫选择性,并且在温和条件下的收率很高。操作简便,广泛适用性以及使用廉价的市售催化剂使该方案优于现有方法。