Immobilized asymmetric hydrogen transfer catalyst was synthesized by surface modification of mesoporous molecular sieve MCM-41 using 3-cholorpropyl-triethoxysilane as modifier, and then being treated with (1R, 2R)-1,2...Immobilized asymmetric hydrogen transfer catalyst was synthesized by surface modification of mesoporous molecular sieve MCM-41 using 3-cholorpropyl-triethoxysilane as modifier, and then being treated with (1R, 2R)-1,2-diaminocyclohexane and dichloro(p-cymene)-ruthenium dimmer successively. The prepared catalyst was characterized by means of FT-IR, PXRD and N\-2 adsorption-desorption isotherms, and was applied in asymmetric hydrogen transfer reaction of reduction of acetophenone to α-phenyl ethanol. It showed a average conversion of 4.02% and 15.23% of ee in all 3 performances. The conversion was almost the same as its corresponding homogenous counterpart, while the ee was somewhat lower.展开更多
文摘Immobilized asymmetric hydrogen transfer catalyst was synthesized by surface modification of mesoporous molecular sieve MCM-41 using 3-cholorpropyl-triethoxysilane as modifier, and then being treated with (1R, 2R)-1,2-diaminocyclohexane and dichloro(p-cymene)-ruthenium dimmer successively. The prepared catalyst was characterized by means of FT-IR, PXRD and N\-2 adsorption-desorption isotherms, and was applied in asymmetric hydrogen transfer reaction of reduction of acetophenone to α-phenyl ethanol. It showed a average conversion of 4.02% and 15.23% of ee in all 3 performances. The conversion was almost the same as its corresponding homogenous counterpart, while the ee was somewhat lower.
