Table 16.
Addition of silyl enolate to aldimines, catalyzed by chiral phosphoric acids
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|---|---|---|---|---|
| entry | Ar | Y | % Yield | % ee |
| 1 | 2-OH-Ph | H | 57 | 0 |
| 2 | 2-OH-Ph | Ph | 100 | 27 |
| 3 | 2-OH-Ph | 2,4,6-Me3C6H2 | 100 | 60 |
| 4 | 2-OH-Ph | 4-MeOC6H4 | 36 | 32 |
| 5 | 2-OH-Ph | 4-NO2C6H4 | 98 | 89 |
| 6 | 4-OH-Ph | 4-NO2C6H4 | 2 | 20 |
| 7 | 4-OMe-Ph | 4-NO2C6H4 | 56 | 3 |
| 8 | Ph | 4-NO2C6H4 | 76 | 39 |
