Table 1.
entry | Lewis acid | temp (°C) | k (s−1 × 10−4) | t1/2 (min) |
---|---|---|---|---|
1 | BEt3 | 90 | 7.7 (0.8) | 15 |
2 | BEt3 | 70 | ~170 | |
3 | BPh3 | 70 | 8.3 (0.2) | 14 |
4 | B(C6F5)3 | 40 | 6.8 (0.5) | 17 |
entry | Lewis acid | temp (°C) | k (s−1 × 10−4) | t1/2 (min) |
---|---|---|---|---|
1 | BEt3 | 90 | 7.7 (0.8) | 15 |
2 | BEt3 | 70 | ~170 | |
3 | BPh3 | 70 | 8.3 (0.2) | 14 |
4 | B(C6F5)3 | 40 | 6.8 (0.5) | 17 |