Entry | R | Product | Yield/ee (%)a | Yield/ee (%)b |
1c | H | 2a | 66/84(R) | 60/83(R) |
2 c | 2-Br | 2b | 60/66(R) | 65/77(R) |
3 c | 3-Br | 2c | 63/76(R) | 65/82(R) |
4 c | 3-CF3 | 2d | 57/79(R) | 62/85(R) |
5 c | 3-OMe | 2e | 60/80(R) | 68/81(R) |
6 c | 4-F | 2f | 55/67(R) | 60/70(R) |
7 c | 4-Cl | 2g | 65/84(R) | 60/72(R) |
8 c | 4-Br | 2h | 66/86(R) | 55/76(R) |