| Entry | R | Product | Time (h) | Yield (%)b |
| 1 | C6H5 | 3a | 5 | 92. 5 |
| 2 | 3-CF3C6H4 | 3b | 5 | 87.3 |
| 3 | 3-FC6H4 | 3c | 5 | 77.3 |
| 4 | 3,4-Cl2C6H3 | 3d | 5 | 74.2 |
| 5 | 3-NO2C6H4 | 3e | 5 | 79.2 |
| 6 | 2,3,4,5,6-F5C6 | 3f | 5 | 98.5 |
| 7 | 3-CH3C6H4 | 3g | 5 | 86.8 |
| 8 | 4-CF3OC6H4 | 3h | 5 | 86.8 |