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Updated: Feb 11, 2026

Preparation of a Corannulene-functionalized Hexahelicene by CopperI-catalyzed Alkyne-azide Cycloaddition of Nonplanar Polyaromatic Units
Published on: September 18, 2016
Visible-Light-Accelerated Copper(II)-Catalyzed Regio- and Chemoselective Oxo-Azidation of Vinyl Arenes
Asik Hossain1, Adiyala Vidyasagar1, Christian Eichinger1
1Institut für OrganischeChemie, Universität Regensburg, Universitätsstr. 31, 93053, Regensburg, Germany.
Abstract:
The visible-light-accelerated oxo-azidation of vinyl arenes with trimethylsilylazide and molecular oxygen as stoichiometric oxidant was achieved. In contrast to photocatalysts based on iridium, ruthenium, or organic dyes, [Cu(dap)2 ]Cl or [Cu(dap)Cl2 ] were found to be unique for this transformation, which is attributed to their ability to interact with the substrates through ligand exchange and rebound mechanisms. CuII is proposed as the catalytically active species, which upon coordinating azide will undergo light-accelerated homolysis to form CuI and azide radicals. This activation principle (CuII -X→CuI +X. ) opens up new avenues for copper-based photocatalysis.
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