Chemical Research in Chinese Universities ›› 2015, Vol. 31 ›› Issue (3): 381-387.doi: 10.1007/s40242-015-4423-9

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Synthesis and Secondary Conformations of Homochiral β-Oligopeptides Containing Aryl Side Chains

ZHANG Yonghong1,2, LI Liangchun3, YUAN Weicheng1, ZHANG Xiaomei1   

  1. 1. Key Laboratory for Asymmetric Synthesis & Chirotechnology of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, P. R. China;
    2. University of Chinese Academy of Sciences, Beijing 100049, P. R. China;
    3. School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, P. R. China
  • Received:2014-09-09 Revised:2015-01-14 Online:2015-06-01 Published:2015-02-12
  • Contact: ZHANG Xiaomei E-mail:xmzhang@cioc.ac.cn
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.21172217).

Abstract:

A series of novel homochiral β-oligopeptides bearing aryl side chains was designed and synthesized from (S)-β-phenyl-β-amino acid derivatives by solution-phase methods. By means of circular dichroism(CD), Fourier- transform infrared spectrometry(FTIR), powder X-ray diffraction analysis(XRD) and density functional theory(DFT) calculations, we suggest that dipeptide P-2 and tripeptide P-3 adopt random coil-like conformations, pentapeptide P-5 and hexapeptide P-6 adopt stable 12-helix conformations in both solution and solid-state. Meanwhile, tetrapeptide P-4 adopt random coil-like conformation in solution and adopt 12-helix conformation in solid state.

Key words: β-Amino acid, β-Oligopeptide, Conformation