Table 1 Optimization of the reaction conditions for the synthesis of S11
| |||||
|---|---|---|---|---|---|
Entry | Catalyst (g) | Temp | Solvent | Time (min) | Yield (%) |
1 | GO (0.04) | 60 | Solvent-free | 35 | 30 |
2 | GO-Fe3O4 (0.04) | 60 | Solvent-free | 30 | 65 |
3 | GO-Fe3O4-Ti (IV) (0.04) | 60 | Solvent-free | 12 | 92 |
4 | GO-Ti (IV) (0.04) | 60 | Solvent-free | 40 | 85 |
5 | GO-Fe3O4-Ti (IV) (0.04) | 60 | C2H5OH | 23 | 85 |
6 | GO-Fe3O4-Ti (IV) (0.04) | 60 | H2O | 25 | 85 |
7 | GO-Fe3O4-Ti (IV) (0.04) | 60 | CHCl3 | 25 | 48 |
8 | GO-Fe3O4-Ti (IV) (0.04) | 60 | Solvent-free | 12 | 92 |
9 | GO-Fe3O4-Ti (IV) (0.04) | Room temperature | Solvent-free | 50 | 70 |
10 | GO-Fe3O4-Ti (IV) (0.04) | 100 | Solvent-free | 12 | 92 |
11 | GO-Fe3O4-Ti (IV) (0.01) | 60 | Solvent-free | 40 | 67 |
12 | GO-Fe3O4-Ti (IV) (0.02) | 60 | Solvent-free | 45 | 85 |
13 | GO-Fe3O4-Ti (IV) (0.03) | 60 | Solvent-free | 20 | 90 |
14 | GO-Fe3O4-Ti (IV) (0.05) | 60 | Solvent-free | 12 | 92 |
