| |
|
| |
| R | dr |
|
| |
| C6H5 (2a) | 8–14:1 |
| 4-ClC6H4 (2b) | 14:1 |
| 4-MeC6H4 (2c) | 11:1 |
| 4-MeOC6H4 (2d) | 10:1 |
| 4-NCC6H4 (2e) | 17:1 |
| 2-MeC6H4 (2f) | 6:1 |
| benzo[d][1,3]dioxol-5-yl (2g) | 20:1 |
| fur-2-yl (2h) | 6:1 |
| N-Ts-indol-3-yl (2i) | 25:1 |
| N-Boc-indol-3-yl (2j) | 20:1 |
|
| |
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