been developed, enabling benign synthesis of valuable benzofuroindolines under sustainable conditions. Mechanistic studies revealed the dual role of iron porphyrin responsible for both phenol oxidation and Lewis acid activation, which differs from the well-explored chemistry of hemin in carbene and nitrene insertion reactions. A preliminary experiment with cytochrome c showed that the turnover of iron
已开发了用于在水溶液中氧化苯酚-吲哚[3 + 2]偶联的hemin / H 2 O 2催化系统,可在可持续条件下良性合成有价值的苯并呋喃二氢吲哚。机理研究揭示了卟啉铁既负责酚氧化又负责路易斯酸活化的双重作用,这与血红素在卡宾和氮烯插入反应中的化学研究方法不同。细胞色素c的初步实验表明,卟啉铁的转换适合大分子环境,效率很高(约13 300 TON)。
combination with chiral phosphoric acid relay catalysis, enabling an enantioselective direct oxidative phenol-indole [3 + 2] coupling reaction to access structurally diverse chiral benzofuroindolines. Differing from previous methods that exclusively make use of isolatable quinones or their imines, this system is capable of harnessing transient N-Boc quinoneimines, and highlights its synthetic potential