Table 1.
| ||||
---|---|---|---|---|
entry | atmos. | solvent | yield 2-d2a | yield 3-d2a (t1/2, T) |
1 | air | CD3OD | 94% | 83% (49 min, 25 °C) |
2 | argon | CD3OD | 97% | 87% (5 h, 5 °C) |
3 | air | acetone-d6 | 84% | n/db |
4 | argon | acetone-d6 | 96% | n/db |
Yields were determined by 1H NMR spectroscopy using 1,4-dicyanobenzene as an internal standard and are based on 1.
n/d = not detected.