prov:value
| - The reaction may be performed in an organic solvent, for example a halogenated hydrocarbon such as dichloromethane or dichioroethane, in the presence of a copper reagent, for example a copper(I)salt such as CuI, or for example a copper(II)reagent such as copper(II)acetate, optionally in the presence of an oxidant, for example 2,2,6,6-tetramethylpiperidine-1-oxide or pyridine-N-oxide, optionally in
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