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Reaction development for the coupling of in situ generated enolates and coumarin π-benzyl complexes.
 | |||
| Entry | Catalyst | Solvent | Conv. (%) |
| 1 | Pd(PPh3)4 | toluene | 68 |
| 2 | Pd(PPh3)4 | THF | 70 |
| 3 | Pd(PPh3)4 | MeCN | 95 (88% yield) |
| 4 | Pd2dba3, dppf | MeCN | 88 |
| 5 | Pd2dba3, BINAP | MeCN | 10 |
