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Reaction optimization for aziridine expansion.
 | |||||||
|---|---|---|---|---|---|---|---|
| entry | cat (mol %)a | T (°C) | yield (%)a | entry | cat (mol %)a | T (°C) | yield (%) |
| 1 | Rh2(OAc)4 (6) | 25 | 0a | 6 | Rh2(esp)2 (3) | 70 | 78 |
| 2 | Rh2(OAc)4 (6) | 70 | 33a | 7 | Rh2(esp)2 (1) | 70 | 79 |
| 3 | Rh2(oct)4 (6) | 70 | 51a | 8 | Rh2(esp)2 (0.5) | 70 | 79 |
| 4 | Rh2(TPA)4 (6) | 70 | 44a | 9 | Rh2(esp)2 (0.1) | 70 | 72 |
| 5 | Rh2(esp)2 (6) | 70 | 79a (75) | ||||
1H NMR yield using mesitylene. All other yields are isolated yields.
