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Results of the synthesis of coumarins 7a–k as well as data on absorption and emission.
| Product | R | n | Yield (%) | λab (nm) | λem (nm) |
|---|---|---|---|---|---|
| 7a | H- | 1 | 50 | 297 | 406 |
| 7b | H- | 2 | 45 | 303 | 405 |
| 7c | H- | 5 | 50 | 329 | 405 |
| 7d | 6-MeO- | 3 | 30 | 363 | 458 |
| 7e | 6-MeO- | 5 | 87 | 365 | 458 |
| 7f | 8-EtO- | 5 | 48 | 311 | 486 |
| 7g | 6-Br- | 1 | 46 | 294 | 424 |
| 7h | 6-Br- | 2 | 45 | 295 | 415 |
| 7i | 6-Br- | 5 | 65 | 283 | 424 |
| 7j | 7-Et2N- | 2 | 82 | 419 | 470 |
| 7k | 7-Et2N- | 5 | 82 | 419 | 470 |
