Enhanced activity of [Ni(NHC)CpCl] complexes in arylamination catalysis

Anthony R. Martin, Yusuke Makida, Sébastien Meiries, Alexandra M.Z. Slawin, Steven P. Nolan

研究成果: Contribution to journalArticle査読

76 被引用数 (Scopus)

抄録

Seven new air- and moisture-stable nickel complexes bearing flexible bulky NHC (N-heterocyclic carbene) ancillary ligands (NHC = IPr, IPrTol, IPrOMe, IPent) are reported. Using experimentally determined crystal structures, the steric environments of [Ni(NHC)CpCl] complexes were analyzed. A survey of their catalytic activity in Buchwald-Hartwig arylamination has been performed. In comparison to less sterically demanding analogues (NHC = IMes, SIMes, IPr, SIPr), an increase in the ligand bulkiness was found to correlate to a dramatic enhancement of the C-N bond formation efficiency. Finally, the catalytic activity of the most active precatalyst, [Ni(IPrOMe)CpCl], was further explored and the scope and limitations of this complex were examined.

本文言語英語
ページ(範囲)6265-6270
ページ数6
ジャーナルOrganometallics
32
21
DOI
出版ステータス出版済み - 11 11 2013

All Science Journal Classification (ASJC) codes

  • 物理化学および理論化学
  • 有機化学
  • 無機化学

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