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Conditions tested for the nucleophilic substitution.[a]
| Entry | T [°C] | t r [min] | Yield 5 [b] [%] |
|---|---|---|---|
| 1 | 50 | 60 | 70 |
| 2 | 80 | 60 | 90 |
| 3 | 100 | 60 | 93 |
| 4 | 125 | 30 | 100 |
| 5 | 125 | 15 | 75 |
[a] See the Experimental Section for the reaction conditions. [b] Conversions were determined by 1H NMR spectroscopy after evaporation of the solvent.
