Chinese Journal of Catalysis ›› 2011, Vol. 32 ›› Issue (9): 1490-1495.DOI: 10.3724/SP.J.1088.2011.10434

• Research papers • Previous Articles     Next Articles

Asymmetric Hydrogenation of Aromatic Ketones Catalyzed by Achiral Monophosphine TPPTS-Stabilized Ru in PEG-Water

QIN Ruixiang1, WANG Jinbo1,2,a, XIONG Wei1, LIU Derong1, FENG Jian1, CHEN Hua2,b   

  1. 1College of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, Chongqing 401331, China; 2Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China
  • Received:2011-04-21 Revised:2011-05-18 Online:2011-09-09 Published:2015-01-24

Abstract: PEG-400 was found to be a green and recyclable reaction medium for asymmetric hydrogenation of aromatic ketones catalyzed by achiral monophosphine TPPTS (P(m-C6H4SO3Na)3), stabilized ruthenium modified by (1S,2S)-DPENDS (DPENDS: disodium salt of sulfonated (1S,2S)-1,2-diphenyl-1,2-ethylene-diamine). A 84.9% ee was obtained for acetophenone under the optimized conditions. The resulting products can be easily separated from the catalyst by extraction with n-hexane. The catalyst immobilized on PEG-400 not only exhibits excellent activity and enantioselectivity but also can be recycled and reused several times without loss of activity and enantioselectivity.

Key words: TPPTS-stabilized ruthenium, aromatic ketone, asymmetric hydrogenation, aromatic sec-alcohol, polyethylene glycol-400-water