Activated Phenacenes from Phenylenes by Nickel-Catalyzed Alkyne Cycloadditions
作者:Zhenhua Gu、Gregory B. Boursalian、Vincent Gandon、Robin Padilla、Hao Shen、Tatiana V. Timofeeva、Paul Tongwa、K. Peter C. Vollhardt、Andrey A. Yakovenko
DOI:10.1002/anie.201103428
日期:2011.9.26
Going zigzag, helical, or in‐between: Angular phenylenes show a propensity for adding alkynesfrom the bay region in processes catalyzed by [Ni(cod)(PMe3)2] (see scheme). These transformations generate novel strain‐ and electronically activatedphenacenes. Mechanistic studies in conjunction with DFT calculations (R=Ph) provide a plausible mechanistic picture.