Table 5.
Survey of non-silver salts for alkene 1b.
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---|---|---|---|
Entry | PG | Salts | Yield %(3b/1b) |
1 | Boc | LiTFA | 0/45 |
2 | Boc | Li(acac) | 0/81 |
3 | Boc | NaOAc | 4/65 |
4 | Boc | KOAc | 6/29 |
5 | Boc | CsOAc | 48/22 |
6 | Boc | CsOPiv | 45/36 |
7 | Boc | CsTFA | 0/80 |
8 | Boc | CsOMs | 3/69 |
9a | Cbz | CsOAc | 71/11 |
100 mol % N6 was used.