Table 2.
Preparation of pyrazoles 54 from β-aminoenones 54d, 54e and 54f.
| Starting Compound | R | R1 | Yields of 54 (%) | Ratio 54:53 |
|---|---|---|---|---|
| 50d | (CH2)2Ph | Me | 81 | 1:0 |
| (CH2)2Ph | t-Bu | 23 | 1:1.4 | |
| 50e | iPr | Me | 71 | 1:0 |
| iPr | t-Bu | - | 1:9 | |
| 50f | t-Bu | Me | 72 | 11:1 |
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