A mild and efficient method for the vanadium-catalyzed intramolecular coupling of tethered free phenols is described. The corresponding phenol-dienone products are prepared directly in good yields with low catalyst loadings. Electronically diverse tethered phenol precursors are well tolerated, and the catalytic method was effectively applied as the key step in syntheses of three natural products and
描述了一种温和有效的方法,用于
钒催化的分子内偶联的游离
酚的偶联。相应的
苯酚-二烯酮产品直接以高收率和低催化剂负载量制备。电子多样性的束缚
酚前体具有良好的耐受性,催化方法有效地用作了合成三种
天然产物和可合成的
吗啡烷
生物碱前体的关键步骤。