We demonstrate for the first time that Cu(I)-catalysis can deliver NâH insertion (NHI) with α-diazocarbonyl compounds in aqueous media. Despite being carried out in water only trace amounts of OâH insertion are seen, indicating the catalyst's overwhelming preference for NHI. Our optimized conditions for NHI converged with those used for the Cu-catalyzed azideâalkyne cycloaddition (CuAAC) for bioconjugation, spurring us to develop an auto-tandem catalytic process where both catalytic cycles operate simultaneously in one-pot. We explore the scope of the method with both small molecule and complex DNA and RNA substrates.
我们首次展示了Cu(I)催化能够在
水相中实现与α-二氮碳基化合物的氮-氢插入(NHI)。尽管实验在
水中进行,但仅观察到微量的氧-氢插入,表明催化剂对NHI的压倒性偏好。我们优化的NHI反应条件与用于Cu催化的
叠氮-
炔烃环加成(Cu
AAC)用于
生物偶联的条件相吻合,这促使我们开发了一种自催化串联过程,其中两个催化循环在一个反应瓶中同时进行。我们探讨了该方法在小分子和复杂DNA及RNA底物上的适用性。