使用稳定、无味且易于处理的元素 S 8作为构建块,开发了一种用于合成多种含硫双杂环的邻炔基苯酚/-苯胺/烯胺酮的方便有效的串联环化/亚磺酰化绿色化学条件。值得注意的是,一步简单的碱介导的有机转化提供了一个苯并呋喃(吲哚或色酮)环和两个 C-S 键。这种方法的吸引人的特点包括没有金属催化剂、温和的条件、良好的官能团耐受性和有价值的产品结构。
A novel copper-catalyzed cyclization/chalcogenation of o-alkynylphenols with epoxides and elemental S8/Se was developed for the synthesis of a 3-chalcogen-benzofuran architecture in a domino process with no intermediate isolation or purification. Various sensitive functional groups were compatible at room temperature and furnished chalcogenation derivatives in moderate to good yields.