Comparing the efficiency of Fe3O4@SiO2-[CuL] with some reported catalysts for synthesis of 3m from the reaction between imidazole and iodobenzene.
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|---|---|---|---|---|
| Entry (ref.) | Catalyst | Conditions | Time (h) | Yield (%) |
| 1 (ref. 47) | Cu2O (10 mol%) | DMSO, KOH, 110 °C | 24 | 90 |
| 2 (ref. 48) | Cu–Y zeolite (10.8 mol%) | DMF, K2CO3, 120 °C | 24 | 99 |
| 3 (ref. 49) | CuFAP (12.5 mol%) | DMSO, K2CO3, 110 °C | 6 | 92 |
| 4 (ref. 50) | Nano-CuO (2.5 mol%) | DMSO, KOH, 110 °C | 24 | 91 |
| 5 (ref. 51) | SiO2-Py-Cu(OAc)2 (5 mol%) | Toluene, Cs2CO3, 100 °C | 8 | 92 |
| 6 (ref. 37) | Fe3O4@SiO2-PVA-Cu(ii) (0.6 mol%) | DMF, t-BuONa, 100 °C | 5 | 94 |
| 7 (this work) | Fe3O4@SiO2-[CuL] (1 mol%) | DMF, Cs2CO3, 110 °C | 5 | 93 |