Table 2 The yields of pyrazole derivatives 5a,b using Cu(OTf) 2 /Et 3 N catalyst under conventional and ultrasonic irradiations conditions
Entry | Product | Ultrasonic irradiation | Silent condition | ||
|---|---|---|---|---|---|
| Â | Â | Time (min.) | Yield% | Time (h) | Yield% |
1 |
| 45 | 90 | 6 | 80 |
2 |
| 45 | 88 | 8 | 78 |
5a
5b