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| |||||
|---|---|---|---|---|---|
| Entry | Z | R | Time (h) | Yield (%) | ee (%) |
| 1 | NTs | H | 4 | 58 | 99 |
| 2a | " | Me | 3 | 12 | 81 |
| 3 | " | Ph | 48 | NR | — |
| 4 | O | H | 3 | 17 | 87 |
| 5 | C(CO2Me)2 | " | 72 | NR | — |
The reaction condition was modified with DCE as solvent at 60 °C instead.
