Table 2.
Entry | Halide | Product | Yield (%) |
Recovery (%) (Azide/Halide) |
|
---|---|---|---|---|---|
1 | 10a | X = Cl | 11 | 51 | –/14 |
2 | 10b | X = Br | 11 | 53 | – |
3 | 12a | X = Cl | 13 | 77[b] | –/11 |
4 | 12b | X = Br | 13 | 61[b] | – |
5 | 54 | – | |||
6 | 83 | – | |||
7 | trace | 66/– | |||
8 | 67 | – | |||
9 | 40 (23:24 = 3:1) |
33/– |
Conditions: 1. Substrate 2M in CH3CN, 1.1 equiv. NBu4N3, 300 W MWI, 50 µL/min. 2. TFA (3 mL, excess) 50 µL/min, 40 PSI back pressure.
Reaction was performed at 125 W.