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Reaction in the Absence of O2[a]
 | |||
|---|---|---|---|
| Co | 4a Conv. | 5a Yield | 6a Yield |
| Co(acac)2 | 40% | 0% | 0% |
| Co(acac)3 | 40% | 0% | 0% |
Standard conditions: 4a (1.0 equiv., 0.1 mmol), 2 (3.0 equiv., 0.30 mmol), DCB (0.25 M, 0.40 mL), Co(acac)n (0.10 equiv., 0.010 mmol), 90 °C, for 24 h under an Ar atmosphere. The conversion of 4a and formation of 5a or 6a was determined by 19F NMR analysis standardized with 10 μL (0.080 mmol) of TFT.
