Citation:
Nie Chun-Fa, Suo Ji-Shuan. Synthesis,Characterization and Catalytic Applications of Asymmetric Hydrogenation Catalyst Immobilized on Hybrid MCM-41[J]. Acta Physico-Chimica Sinica,
;2004, 20(02): 149-153.
doi:
10.3866/PKU.WHXB20040208
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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.
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