Scheme 3. Functionalization of the benzylamine BCP Bpin. [a] (i) 1.2 equiv. 4-lithioanisole, THF, −78 °C, 30 m, then rt, 30 m. (ii) 2.5 equiv. diisopropyl azodicarboxylate (DIAD), rt, 16 h. [b] 7i used as 2.2 equiv. relative to limiting reagent, tosylsulfonylhydrazone. (i) 2.2 equiv. NaIO₄, THF/H₂O, 1 h, then sat'd aq. NH₄Cl, 24 h; 1 equiv. 13, 1.5 equiv. Cs₂CO₃, 1,4-dioxane, 110 °C, 18 h.