期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 57, 期 27, 页码 8288-8292出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201801678
关键词
copper; homogeneous Catalysis; oxo-azidation; oxygen; photocatalysis
资金
- DFG [GRK 1626]
- AvH Foundation
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)Cl-2] 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. Cu-II is proposed as the catalytically active species, which upon coordinating azide will undergo light-accelerated homolysis to form Cu-I and azide radicals. This activation principle (Cu-II-XCuI+X-.) opens up new avenues for copper-based photocatalysis.
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