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Directed cycloaddition of triazines and alkynyltrifluoroborates.
 | |||||
|---|---|---|---|---|---|
| Entry | Triazine | Alkyne (R2) | Product | Lewis acid[a] [(equiv)] | Yield3 a[%] |
| 1 |  |
Ph; 2 a |  |
Me3SiCl (3) | R=Ph; 75 (8) |
| 2 |  |
Me3SiCl (3) | R=C6H9; 83 (9) | ||
| 3 |  |
Ph; 2 a |  |
BF3⋅OEt2 (3) | R=Ph; 72 (10) |
| 4 | |
BF3⋅OEt2 (3) | R=C6H9; 76 (11) | ||
| 5 |  |
Ph; 2 a |  |
BF3⋅OEt2 (3) | R=Ph; 82 (12) |
| 6 | Bu; 2 c | BF3⋅OEt2 (3) | R=Bu; 62 (13) | ||
| 7 |  |
Ph; 2 a |  |
BF3⋅OEt2 (3) | R=Ph; 50 (14) |
| 8 | Bu; 2 c | Me3SiCl (3) | R=Bu; 62 (15) | ||
