Table 1.
| ||
---|---|---|
entry | conditions | yield of 2a |
1 | Pd(OAc)2 (10 mol %), PhI(OAc)2 (2.0 equiv) PhMe, rt, 12 h | 0% |
2 | Pd(OAc)2 (10 mol %), PhI(OAc)2 (2.0 equiv) CH3CN, rt, 12 h | 5–10% |
3 | Pd(OAc)2 (10 mol %), PhI=O, (3.0 equiv) CH3CN, rt, 12 h | N. R. |
4 | Pd(OAc)2 (10 mol %), Selectfluor (2.0 equiv) CH3CN, rt, 12 h | 43% |
5 | PhI(OAc)2 (1.1 equiv), CH3CN | 0%b |
6 | PhI(O2CCF3)2 (1.1 equiv), (F3C)2CHOH | 0%b |
Isolated yield (%) after purification by chromatography on SiO2;
2a was the only isolable product.