Dehydrogenation of Alcohols by Bis(phosphinite) Benzene Based and Bis(phosphine) Ruthenocene Based Iridium Pincer Complexes
作者:Alexey V. Polukeev、Pavel V. Petrovskii、Alexander S. Peregudov、Mariam G. Ezernitskaya、Avthandil A. Koridze
DOI:10.1021/om300921q
日期:2013.2.25
Dehydrogenation of alcohols by three iridium pincer complexes, IrH(Cl)[2,6-(tBu2PO)2C6H3] (1), IrH(acetone)[2,6-(tBu2PO)2C6H3]}BF4} (2), and IrH(Cl)[2,5-(tBu2PCH2)2C5H2}Ru(C5H5)] (3), is reported, in both the presence and the absence of a sacrificial hydrogen acceptor. Dehydrogenation of secondary alcohols proceeds in a catalytic mode with turnover numbers up to 3420 (85% conversion) for acceptorless
通过三种铱钳子配合物IrH(Cl)[2,6-(t Bu 2 PO)2 C 6 H 3 ](1),IrH(丙酮)[2,6-(t Bu 2 PO))对醇进行脱氢2 C 6 H 3 ]} BF 4 }(2)和IrH(Cl)[2,5-(t Bu 2 PCH 2)2 C 5 H 2 } Ru(C 5 H 5)](3据报道,在存在和不存在牺牲氢受体的情况下。仲醇的脱氢以催化方式进行,其转化数高达3420(转化率为85%),用于1-苯基乙醇的无受体脱氢。甚至在室温下,伯醇也很容易脱羰,从而形成具有催化活性的16e Ir-CO加合物。详细研究了这种转变的机理,尤其是对于乙醇。分离并表征了新的中间体。