Entry | Conditions | Catalyst | Time (min) | Yield (%) | References |
---|
1 | EtOH, reflux | DABCOa | 1.5–15 | 65–85 | [13] |
2 | CH3CN, rt | – | 3600–9000 | 70–93 | [14] |
3 | aq. EtOH, hν | CH3CO2Na | 5–10 | 61–89 | [15] |
4 | H2O, rt | KPb | 30–150 | 85–96 | [16] |
5 | H2O, rt | Boric acid | 50–1440 | 82–95 | [17] |
- a1,4-Diazabicyclo[2]octane
- bPotassium phthalimide