Table 8.
Enantioselective DcA of Z-Enol Carbonates
 | ||||
|---|---|---|---|---|
| entry | R | time (h) | yield (%) | ee (%) |
| 1 | Me | 3 | 96 | 94 |
| 2 | Et | 2 | 94 | 94 |
| 3 | n-Pent | 16 | 93 | 92 |
| 4 | Bn | 1 | 75 | 88 |
| 5 | i-Pr | 24 | 30 | 32 |
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