Table 4.
Ring Contraction of Cicloalkenes with 1.3 eq. p-Tol-IF2.a
| Entry | Cycloalkene | Product (Yield) |
| 1 |  |
 |
| 2 |  |
 |
| 3 |  |
 |
| 4 |  |
 |
| 5 |  |
 |
a Reagents and Conditions: 5 HF-Et3N, CH2Cl2, -20 °C, 1 h. b Reaction time: 2 h.
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