Fig. 2. Synthesis of 1-iodo- and 1-bromo-3-substituted BCPs. All reactions performed using 2 equiv. tricyclo[1.1.1.0^1,3]pentane (TCP) and 10 mol% BEt₃ (1 M in hexane) at room temperature, unless indicated otherwise. ^a1.1 equiv. TCP, 1 mol% BEt₃, 0 °C. ^b1.3 equiv. TCP, rt. ^c1.3 equiv. TCP, 0 °C. ^dCo-solvent added to solubilize the substrate: MeOH for 5m, n; CH₂Cl₂ for 5h, k, r and 6e, f. ^e5% staffane observed.