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Practicality of alkyne 1,2‐carboboration. A) Gram‐scale synthesis and transformations of 4a: (I) 4‐iodoanisole, Pd(PPh3)4, NaOH, 1,4‐dioxane, 100 °C; (II) NaN3, CuSO4, MeOH, 50 °C, 12 h; (III) allyl alcohol, Cu(OAc)2, NEt3, rt, 16 h; (IV) tert‐butyl acrylate, Pd(OAc)2, 1,10‐phenanthroline, O2, DMA, 80°C, 12 h; (V) CuCl2, THF/MeOH/H2O, 100 °C, 24 h; (VI) CuBr2, EtOH/H2O, 100 °C, 24 h. (B) Synthetic applications.
