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| Entry | Catalysts | Temperature (°C) | Time (h) | Yield (%) | Ref. |
|---|---|---|---|---|---|
| 1 | Trifluoroethanol (TFE) (2 mL) | Reflux | 6 | 80 | 60 |
| 2 | 1-Butyl-3-methylimidazolium hydroxide (2 mL) | 80 | 4 | 82 | 61 |
| 3 | Cu/C nanocatalyst (2 mol%), CH3CN (2 mL) | 80 | 8 | 84 | 62 |
| 4 | Graphene oxide (10 mol%)/water (3 mL) | 80 | 5 | 86 | 63 |
| 5 | ETG-acetamide (50 mg) | 80 | 3 | 71 | This work |
