期刊
ORGANOMETALLICS
卷 37, 期 7, 页码 1133-1140出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.organomet.8b00037
关键词
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资金
- Single Investigator Cottrell College Science Award from Research Corporation for Science Advancement [19750]
- UR American Chemical Society Petroleum Research Fund [52162-UR1]
Four (3,4-diphenylcyclopentadienone)iron tricarbonyl compounds were synthesized, and their activities in transfer hydrogenations of carbonyl compounds and transfer dehydrogenations of alcohols were explored and compared to those of the well-established [2,5-(SiMe3)(2)-3,4-(CH2)(4)(eta(4)-C4C=0)]Fe(CO)(3) (3). A new compound, [2,5-bis(3,5-dimethylphenyl)-3,4-diphenylcyclopentadienone]iron tricarbonyl (7), was the most active catalyst in both transfer hydrogenations and dehydrogenations, and compound 3 was the least active catalyst in transfer hydrogenations. Evidence was found for product inhibition of both 3 and 7 in a transfer dehydrogenation reaction, with the activity of 3 being more heavily affected. A monomeric iron hydride derived from 7 was spectroscopically observed during a transfer hydrogenation, and no diiron bridging hydrides were found under reductive or oxidative conditions. Initial results in the transfer hydrogenation of Nbenzylideneaniline showed that 3 was a significantly less active catalyst in comparison to the (3,4-diphenylcyclopentadienone) iron tricarbonyl compounds.
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