Sandmeyer reactions (diazonium → aryl halide/cyanide) (Replace aromatic diazonium with Cl/Br/CN using Cu(I) salts)
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Replace aromatic diazonium with Cl/Br/CN using Cu(I) salts
What each symbol means
| Symbol | What it stands for |
|---|---|
| CuX | Cuprous halide (source of X) |
| ArN₂⁺ | Arenediazonium salt (from primary aromatic amine) |
When to use this
Diazotization at low temperature; then Cu-catalyzed substitution; distinguishes from simple SNAr on unactivated halides.