Fe(TF4DMAP)Cl-catalysed intramolecular C–H amination of α-azidoketones under photocatalytic conditionsa.
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Entry | Substrate | Product | Conv. (%) | Yield (%) |
1 |
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70 | 46 (42) |
2 |
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100 | 90 (80) |
3 |
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100 | 92 (85) |
4 |
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100 | 82 (77) |
5 |
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100 | 84 (77) |
6 |
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100 | 90 (82) |
Reactions were run under argon with 0.3 mmol of the azide, Boc2O (0.36 mmol), 9 × 10−3 mmol of the catalyst (3 mol% with respect to the azide) and 120 mg 4 Å MS in 2.0 mL of anhydrous DCE in a 10.0 mL sealed tube. The tube was irradiated with a blue LED at 25–35 °C. Isolated yields are shown in the brackets.