bright fluorescence, and applicability to anion recognition at the pyrrolic hydrogen atom. We report herein the effective synthesis of pseudo‐aza[5]helicene and aza[7]helicene derivatives, and unexpectedformation of azahepta[8]circulenes by oxidative fusion reactions. By choosing reaction conditions and peripheral substituents attached at the terminal indole moieties, we obtained aza[7]helicenes 10 a–c
Iridium(I)‐Catalyzed C−H Borylation in Air by Using Mechanochemistry
作者:Yadong Pang、Tatsuo Ishiyama、Koji Kubota、Hajime Ito
DOI:10.1002/chem.201900685
日期:2019.3.27
the first time to an iridium(I)‐catalyzed C−H borylation reaction. By using either none or just a catalytic amount of a liquid, the mechanochemical C−H borylation of a series of heteroaromatic compounds proceeded in air to afford the corresponding arylboronates in good‐to‐excellent yields. A one‐pot mechanochemical C−H borylation/Suzuki–Miyaura cross‐coupling sequence for the directsynthesis of 2‐aryl