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Comparison between methods for the synthesis of compounds 10a,b–13.
| Compound No. | Reflux | MW | ||
|---|---|---|---|---|
| Time | Yield% | Time | Yield% | |
| 10a | 540 min. | 70 | 5 min. | 76 |
| 10b | 480 min. | 78 | 5 min. | 84 |
| 11a | 360 min. | 88 | 3 min. | 92 |
| 11b | 420 min. | 72 | 3 min. | 78 |
| 12a | 420 min. | 73 | 3 min. | 80 |
| 12b | 420 min. | 75 | 7 min. | 81 |
| 13 | 720 min. | 69 | 8 min. | 78 |
