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| 3a | X = H | R = C6H4-4-F | 4a 86% |
| 3b | X = H | R = C6H5 | 4b 79% |
| 3q | X = Me | R = C6H4-4-F | 4q 87% |
| 3r | X = Ph | R = C6H5 | 4r 76% |
| 3t | X = CN | R = C6H4-4-F | 4t 80% |
a 3 (0.1 mmol), NaOAc (1 mmol), in dimethylacetamide (4 mL) in a sealed microwave vial; for further details, see the ESI.
bYields = isolated yields after purification by silica gel chromatography.
