Table 3.
entry | additive | time (h) | yield | ee |
---|---|---|---|---|
1 | NaCl | 24 | trace | − |
2 | NaBF4 | 8 | 81 | 88 |
3 | NaPF6 | 6 | 97 | 87 |
4 | NaSbF6 | 5 | 99 | 81 |
5 | n-Bu4NPF6 | 24 | 98 | 90 |
6 | n-Bu4NBF4 | 24 | 95 | 88 |
7 | NaBPh4 | 24 | trace | − |
8 | NH4BF4 | 15 | 93 | 89 |
9 | NH4PF6 | 12 | 96 | 91 |