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Relative rates of hydroamination with different protecting groups on nitrogen; (1a–c, 0.05 M) with catalyst 5 (2.5 mol %) in DCM and 55 μL CH3OH promoter (1.9 M).
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| Entry | Substrate | kobs∙105/s−1 |
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| 1 | 1a/CD2Cl2 | 539 ± 30 |
| 2 | 1b/CH2Cl2 | 6.9 ± 0.2 |
| 3 | 1c/CH2Cl2 | ≤0.14 |
| 4 | 1d/CD2Cl2 | n.d.* |
*No reaction with 10 mol % catalyst 5.
