Table 4.
Entry | Sol–Gel Conjugate | Time (h) | Conversion 2 (%) |
---|---|---|---|
1 | - 2 | 2 | 65 |
2 | Hoveyda–Grubbs | 2 | <2 |
3 | CAL-B | 2 | 0 |
4 | CAL-B–Hoveyda–Grubbs | 2 | 60 (36) 3 |
1 Reaction conditions: 1 (8 µL, 0.033 mmoles), THF (1 mL), catalyst (20 mg) and 25 °C; 2 the reaction performed with the soluble catalyst (0.3 mg); 3 conversion after third cycle.