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| entry | R | product | silyl | Z/E | time (h) | conva (%) |
|---|---|---|---|---|---|---|
| 1 | Me (10) | 10a | Me3Si | 2.1 | 15 | 75 |
| 2 | Et (11) | 11a | Me3Si | 3.0 | 14 | 81 |
| 3 | iPr (12) | 12a | Me3Si | 4.9 | 5 | 92 |
| 4 | tBu (13) | 13a | Me3Si | – | – | 0b |
| 5 | Me (10) | 10a | Et3Si | 2.1 | 6 | 75 |
| 6 | Me (10) | 10a | iPr3Si | 2.3 | 6 | 23 |
Isolated yields.
Only decomposition observed.
