Entry | Conditions | Time (min) | Yielda (%) |
---|---|---|---|
Solvent/temp (°C)/catalyst (g) | |||
1 | H2O/EtOH (1:1)/60/‒ | 180 | 28 |
2 | H2O/60/0.03 | 30 | 70 |
3 | EtOH/60/0.03 | 30 | 58 |
4 | CHCl3/60/0.03 | 60 | 50 |
5 | MeOH/60/0.03 | 60 | 70 |
6 | ‒/60/0.03 | 120 | 42 |
7 | ‒/80/0.03 | 90 | 58 |
8 | H2O/EtOH (1:1)/r.t/0.03 | 15 | 10 |
9 | H2O/EtOH (1:1)/40/0.03 | 15 | 58 |
10 | H2O/EtOH (1:1)/60/0.03b | 15 | 92 |
11 | H2O/EtOH (1:1)/60/0.01 | 50 | 76 |
12 | H2O/EtOH (1:1)/60/0.02 | 30 | 80 |
13 | H2O/EtOH (1:1)/60/0.04 | 20 | 92 |
14 | H2O/EtOH (1:1)/60/0.05 | 35 | 70 |