TY - JOUR
T1 - Asymmetric hydrogenation of ethyl pyruvate on chirally modified Pt catalysts supported on Al2O3@FDU-14 mesoporous composites
AU - Wang, Haihong
AU - Wang, Hongna
AU - Li, Xiaohong
AU - Wang, Yimeng
AU - Wu, Peng
PY - 2011/11
Y1 - 2011/11
N2 - A series of Al2O3@FDU-14 composites with different alumina loadings were prepared using a solid state grinding method. The 4% Pt catalysts supported on Al2O3@FDU-14 were prepared by impregnation using H2PtCl6. X-ray diffraction, transmission electron microscopy, and nitrogen adsorption characterization of the Pt/Al2O3@FDU-14 catalysts indicated that the mesoporous features of the FDU-14 mesopolymer were retained. The Pt/Al2O3@FDU-14 catalysts were used in the asymmetric hydrogenation of ethyl pyruvate after they were chirally modified with cinchonidine. For Al2O3 loading from 5% to 15%, Al2O3 was uniformly dispersed inside the mesoporous channels of FDU-14 host. Ethyl pyruvate conversion and their ee values increased with increasing alumina loading, with a highest ee value of 80%. It was suggested that the alumina coating inside the mesoporous channels of FDU-14 decreased the surface electronic density of the FDU-14 mesopolymer so that cinchonidine can be easily adsorbed on the surface of Pt/Al2O3@FDU-14 catalysts. As compared with chirally modified Pt/FDU-14 catalysts, chirally modified Pt/Al2O3@FDU-14 catalysts gave higher ee values.
AB - A series of Al2O3@FDU-14 composites with different alumina loadings were prepared using a solid state grinding method. The 4% Pt catalysts supported on Al2O3@FDU-14 were prepared by impregnation using H2PtCl6. X-ray diffraction, transmission electron microscopy, and nitrogen adsorption characterization of the Pt/Al2O3@FDU-14 catalysts indicated that the mesoporous features of the FDU-14 mesopolymer were retained. The Pt/Al2O3@FDU-14 catalysts were used in the asymmetric hydrogenation of ethyl pyruvate after they were chirally modified with cinchonidine. For Al2O3 loading from 5% to 15%, Al2O3 was uniformly dispersed inside the mesoporous channels of FDU-14 host. Ethyl pyruvate conversion and their ee values increased with increasing alumina loading, with a highest ee value of 80%. It was suggested that the alumina coating inside the mesoporous channels of FDU-14 decreased the surface electronic density of the FDU-14 mesopolymer so that cinchonidine can be easily adsorbed on the surface of Pt/Al2O3@FDU-14 catalysts. As compared with chirally modified Pt/FDU-14 catalysts, chirally modified Pt/Al2O3@FDU-14 catalysts gave higher ee values.
KW - Asymmetric hydrogenation
KW - Cinchonidine
KW - Ethyl pyruvate
KW - Mesoporous alumina composite
KW - Periodic mesoporous resol
KW - Platinum
UR - https://www.scopus.com/pages/publications/84455195661
U2 - 10.1016/S1872-2067(10)60274-4
DO - 10.1016/S1872-2067(10)60274-4
M3 - 文章
AN - SCOPUS:84455195661
SN - 1872-2067
VL - 32
SP - 1677
EP - 1684
JO - Chinese Journal of Catalysis
JF - Chinese Journal of Catalysis
IS - 11
ER -