Chinese Journal of Catalysis ›› 2017, Vol. 38 ›› Issue (4): 691-698.DOI: 10.1016/S1872-2067(17)62790-6

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Porous Rh/BINAP polymers as efficient heterogeneous catalysts for asymmetric hydroformylation of styrene: Enhanced enantioselectivity realized by flexible chiral nanopockets

Tao Wanga,b, Wenlong Wanga, Yuan Lüa, Kai Xiongc, Cunyao Lia,b, Hao Zhangd, Zhuangping Zhanc, Zheng Jiangd, Yunjie Dinga   

  1. a Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
    b University of Chinese Academy of Sciences, Beijing 100049, China;
    c Department of Chemistry, Xiamen University, Xiamen 361005, Fujian, China;
    d Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China
  • Received:2016-12-15 Revised:2017-01-15 Online:2017-04-18 Published:2017-04-12
  • Supported by:

    This work was supported by the Strategic priority Research Program of the Chinese Academy of Sciences (XDB17020400).

Abstract:

A new chiral monomer, (S)-5,5'-divinyl-BINAP, was successfully synthesized and embedded into two different porous organic polymers (Poly-1 and Poly-2). After loading a Rh species, the catalysts were applied for the heterogeneous asymmetric hydroformylation of styrene. Compared with the homogeneous BINAP analogue, the enantioselectivity of Rh/Poly-1 catalyst was drastically increased by approximately 70%. The improved enantioselectivity of the porous Rh/BINAP polymers was attributed to the presence of flexible chiral nanopockets resulting from the increased bulk of the R groups near the catalytic center.

Key words: Porous organic polymer, Heterogeneous catalysis, Asymmetric hydroformylation, Enhanced enatioselectivity, Chiral nanopocket