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| 14) | Homo-hydroalkynylation of 2a to produce enyne product was also observed. |
| 15) | The reaction at lower temperature than 150 °C produced no aryl alkynyl ketone product. This result would indicate that decarbonylation is not the rate-determining step. We think that high reaction temperature is required in order to exclude carbonyl ligand (CO) from the palladium center after decarbonylation. |
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