Table 2.
| ||||
---|---|---|---|---|
entry | %BQ | time (h) | yield (%) | unreacted 1m (%) |
1 | 0 | 1 | 28 | 46 |
2 | 0 | 3 | 28 | 47 |
3 | 0 | 48 | 25 | 0 |
4 | 5 | 1 | 70 | 0 |
5 | 10 | 1 | 70 | 0 |
6 | 50 | 1 | 69 | 0 |
7 | 10 | 3 | 69 | 0 |
Conditions: Reactions were conducted with 0.1 mmol (1 equiv) of 1m and 2.0 equiv of BzO2tBu. Yields were determined by 1H NMR.