Table 2.
Investigation of Heterocycle Scope
| Entry | Heterocycle | Time (h) | # | Yield (%)a |
|---|---|---|---|---|
| 1 |  |
14 | 3 | 59 |
| 2 | 14 | 4 | 83 | |
| 3 | 24 | 5 | 64 | |
| 4 |  |
14 | 6 | 96 |
| 5 | 9.5 | 7 | 98 | |
| 6 | 7 | 8 | 96 |
a
Isolated yield of pure product.
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