Table 5.
Asymmetric DcA of Allyl Vinyl Carbonates Generated from Vinylogous Thioesters
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|---|---|---|---|---|---|---|---|
| entry | n | R1 | R2 | solvent | temp (°C) | yield (%) | ee (%) |
| 1 | 1 | H | H | THF | −20 | 100 | 98 |
| 2 | 2 | H | H | THF | 0–4 | 100 | 94 |
| 3 | 1 | Me | H | THF | 0–4 | 100 | 99 |
| 4 | 0 | Me | H | THF | 0–4 | 96 | 80 |
| 5 | 1 | Ph | H | Dioxane | 23 | 100 | 97 |
| 6 | 1 | H | Me | THF | 0–4 | 91 | 79 |
