Table 1.
Entry | Allene carbonyl | Product | Yield (%) |
---|---|---|---|
1 |
64 |
65 |
71 |
2 |
66 |
67 |
62 |
3 |
68 |
69 |
67 |
4 |
70 |
71 |
67 |
Reaction conditions: 1.0 equiv. of allene carbonyls, 1.1 equiv. of Me3Si–SnBu3 (17), 5 mol % of (π-allyl)2Pd2Cl2, THF, room temperature, 10 min.