Aliphatic and aromatic intramolecular C-H activation on Cp*Ir(NHC) complexes

Aliphatic and aromatic intramolecular C-H activation on Cp*Ir(NHC) complexes
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DOI:
10.1021/om060343r
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发表时间:
2006-07-31
期刊:
影响因子:
2.8
通讯作者:
Peris, Eduardo
Peris, Eduardo
中科院分区:
化学2区
文献类型:
--
作者:
Corberan, Rosa;Sanau, Mercedes;Peris, Eduardo

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在一系列基于“Cp*Ir(NHC)”片段的配合物中观察到了容易的分子内脂肪族和芳香族 C-H 活化(NHC = 1-二苯基甲基-3-甲基咪唑-2-亚基、1-叔丁基-3-甲基咪唑-2-亚基、1-苄基-3-叔丁基咪唑-2-亚基和1-苄基-3-异丙基咪唑-2-亚基)。我们进行了一系列实验来阐明决定发生芳香族或脂肪族 C-H 活化的因素。在脂肪族和芳香族 C-H 活化都可能的情况下,空间因素控制反应的选择性。
Facile intramolecular aliphatic and aromatic C-H activations have been observed for a series of complexes based on the "Cp*Ir(NHC)" fragment (NHC = 1-diphenylmethyl-3-methylimidazol-2-ylidene, 1-tert-butyl-3-methylimidazol-2-ylidene, 1-benzyl-3-tert-butylimidazol-2-ylidene, and 1-benzyl-3-isopropylimidazol-2-ylidene). We have performed a series of experiments for elucidating the factors that determine the aromatic or aliphatic C-H activations that occur. In the cases where both aliphatic and aromatic C-H activations are possible, steric factors govern the selectivity of the reaction.