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Synthesis of N -acyl carbazoles, phenoxazines and acridines from cyclic diaryliodonium salts.

Nils ClamorMattis DamrathThomas J KuczmeraDaniel DuvinageBoris J Nachtsheim
Published in: Beilstein journal of organic chemistry (2024)
N -Acyl carbazoles can be efficiently produced through a single-step process using amides and cyclic diaryliodonium triflates. This convenient reaction is facilitated by copper iodide in p -xylene, using the commonly found activating ligand diglyme. We have tested this method with a wide range of amides and iodonium triflates, proving its versatility with numerous substrates. Beyond carbazoles, we also produced a variety of other N -heterocycles, such as acridines, phenoxazines, or phenazines, showcasing the robustness of our technique. In a broader sense, this new method creates two C-N bonds simultaneously based on a mono-halogenated starting material, thus allowing heterocycle formation with diminished halogen waste .
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