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Preparation of 13 via palladium-catalyzed cross-couplings and 14 via N,O-bond cleavage
| Entry | Cross-Coupling Reagent | Product | Yield (%) | Product | Yield (%) |
|---|---|---|---|---|---|
| 1 | 12{1} | 13{1} | 99 | 14{1} | 87 |
| 2 | 12{2} | 13{2} | 94 | 14{2} | 88 |
| 3 | 12{3} | 13{3} | 99 | 14{3} | 83 |
| 4 | 12{4} | 13{4} | 99 | 14{4} | 81 |
| 5 | 12{5} | 13{5} | 88 | 14{5} | 90 |
| 6 | 12{6} | 13{6} | 57 | 14{6} | 92 |
