Entry | Catalyst | Mol % | Time (min/h) | Yield (%) | Ref. |
---|
1 | NaHSO4-SiO2 | 10 | 7.5 h | 91 | [18] |
2 | TBAHS | 10 | 3.5 h | 94 | [39] |
3 | DABCO-Br | 10 | 2.5 h | 90 | [41] |
4 | KAl(SO4)2.12H2O | 50 | 4.0 h | 90 | [19] |
5 | EPZ 10 | 10 | 3.0 h | 95 | [42] |
6 | Yb(OTf)3/[BPy]BF4 | 1/2 mL | 5.0 h | 89 | [25] |
7 | ZnO-CH3COCl | 30 | 16.0 h | 96 | [43] |
8 | LiBr | 15 | 1.0 h | 84 | [17] |
9 | Sulfamic acid | 10 | 11.0 h | 94 | [15] |
10 | SmCl3 | 20 | 8.0 h | 98 | This paper |