Table 3. Synthesis of Tri- and Tetrasubstituted Cyclopropenes by Nucleophilic Attack^a.

^aPerformed with 3 (0.1 mmol), carbon or heteroatomic nucleophiles (0.15–0.2 mmol), CH₂Cl₂, 0 °C, 2–15 min.

^bCs₂CO₃ (0.1 mmol) was added as base. Yields are reported on the basis of isolated pure product.