Table 4.
Phenylpyruvic acid in GBB-3CR.
 | ||||
| Entry | Starting materials | Product | Yield, % | |
| Aminopyrazoles | R2 | |||
| 1 | 2a | 4-F | 4w | 48 |
| 2 | 2b | 3-F | 4x | 42 |
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