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Citation: LIU De-Rong, XIONG Wei, YANG Chao-Fen, WANG Jin-Bo, CHEN Hua, LI RUI-Xiang, LI Xian-Jun. Asymmetric Hydrogenations of Acetophenone and Its Derivatives over RuRh/γ-Al₂O₃ Modified by (1S, 2S)-DPEN and PPh₃[J]. Acta Physico-Chimica Sinica, ;2007, 23(04): 479-483. doi: 10.1016/S1872-1508(07)60031-X shu

Asymmetric Hydrogenations of Acetophenone and Its Derivatives over RuRh/γ-Al₂O₃ Modified by (1S, 2S)-DPEN and PPh₃

1.
Key Laboratory of Green Chemistry and Technology of the Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China; College of Chemical and Biological Engineering, Chongqing College of Science and Technology, Chongqing 400050, P. R. China

Received Date: 5 September 2006
Available Online: 3 April 2007

The asymmetric hydrogenations of acetophenone and its derivatives over the bimetallic catalyst RuRh/γ-Al2O3 modified by PPh3 and(1S, 2S)-DPEN [(1S, 2S)-1,2-diphenylethane-1,2-diamine]were studied. The effects of the concentration of KOH, temperature, ratio of ruthenium to rhodium, and the concentration of diamine on the asymmetric hydrogenation of acetophenone were investigated in detail. The results showed that this catalyst system had high activity and moderate enantioselectivity for the asymmetric hydrogenation of acetophenone and its derivatives. Under the optimum conditions, the conversions of acetophenone, ethylphenylketone, and isopropylphenylketone were up to 92.5%, 95.9%, and 100%, and the enantioselectivities for the formation of (R)-aromatic alcohols were 79.6%, 81.2%, and 81.4%, respectively.
- Ruthenium; Rhodium; Bimetallic catalyst; Acetophenone; Asymmetric hydrogenation
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沈阳化工大学材料科学与工程学院沈阳 110142

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Asymmetric Hydrogenations of Acetophenone and Its Derivatives over RuRh/γ-Al2O3 Modified by (1S, 2S)-DPEN and PPh3

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通讯作者: 陈斌, bchen63@163.com

Asymmetric Hydrogenations of Acetophenone and Its Derivatives over RuRh/γ-Al₂O₃ Modified by (1S, 2S)-DPEN and PPh₃