Acta Phys. -Chim. Sin. ›› 2004, Vol. 20 ›› Issue (02): 149-153.doi: 10.3866/PKU.WHXB20040208

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Synthesis,Characterization and Catalytic Applications of Asymmetric Hydrogenation Catalyst Immobilized on Hybrid MCM-41

Nie Chun-Fa;Suo Ji-Shuan   

  1. State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000;The First Hospital of People’s Liberation Army, Lanzhou 730030
  • Received:2003-08-04 Revised:2003-09-29 Published:2004-02-15
  • Contact: Suo Ji-Shuan

Abstract: Organic-inorganic hybrid mesoporous molecular sieve MCM-41 was synthesized by co-condensation of tetraethoxysilane (TEOS) and 3-chlorpropyl-triethoxysilane, then reacted with (1R,2R)-1,2-diaminocyclohexane and dichloro(p-cymene)-ruthenium dimer successively to afford immobilized asymmetric hydrogen transfer catalyst. The prepared catalyst was characterized by means of FT-IR, PXRD and N2 adsorption-desorption isotherms,and was applied in asymmetric hydrogen transfer reactions of reduction of acetophenone to α-phenyl ethanol. It showed an average conversion of 6.42% and ee (enantiomeric excess) value of 12.64% in all 3 performances. The conversion was a little higher than its corresponding homogenous counterpart (conversion of 3.56% and ee value of 33.04%), while the ee values were somewhat lower.

Key words: Organic-inorganic hybrid, Mesoporous molecular sieve MCM-41,  Asymmetric hydrogen transfer, Immobilized catalyst