Asymmetric Hydrogenation of Aromatic Ketones Catalyzed by L-Proline-Modified Ru-PPh3/γ-Al2O3 Catalyst

doi:10.3724/SP.J.1088.2011.10308

Abstract

Abstract: The asymmetric hydrogenation of aromatic ketones catalyzed by L-proline-modified Ru-PPh₃/γ-Al₂O₃ was investigated. The effects of reaction conditions on the asymmetric hydrogenation of acetophenone were discussed in detail. The results indicated that natural chiral compound L-proline has a good modification effect on the Ru-PPh₃/γ-Al₂O₃ catalyst. Under the optimum conditions, the conversion of acetophenone was up to 100%, and the enantioselectivity for the formation of (R)-phenyl ethanol was 59.5%. The synergistic effect between L-proline and KOH was observed. The chiral alcohol products could be easily separated by centrifugation. The catalyst was reused several times without remarkable change of enantioselectivity.

Key words: L-proline, aromatic ketone, asymmetric hydrogenation, ruthenium, supported catalyst

XIONG Wei, LIU De-Rong, JIA Yun, QIN Rui-Xiang, QIU Hui-Dong, WANG Jin-Bo, LI Xian-Jun. Asymmetric Hydrogenation of Aromatic Ketones Catalyzed by L-Proline-Modified Ru-PPh₃/γ-Al₂O₃ Catalyst[J]. Chinese Journal of Catalysis, 2011, 32(7): 1275-1279.

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URL: https://www.cjcatal.com/EN/10.3724/SP.J.1088.2011.10308

https://www.cjcatal.com/EN/Y2011/V32/I7/1275

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Asymmetric Hydrogenation of Aromatic Ketones Catalyzed by L-Proline-Modified Ru-PPh₃/γ-Al₂O₃ Catalyst

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