Discontinuous pressure effect upon enantiodifferentiating photosensitized isomerization of cyclooctene |
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| Authors: | Kaneda Masayuki Asaoka Sadayuki Ikeda Haruhiko Mori Tadashi Wada Takehiko Inoue Yoshihisa |
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| Institution: | Department of Molecular Chemistry, Osaka University, 2-1 Yamada-oka, Suita 565-0871, Japan. |
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| Abstract: | A hydrostatic pressure of up to 750 MPa induced discontinuous changes in the enantiomeric excess of the (E)-isomer obtained in the enantio-differentiating photoisomerization of (Z)-cyclooctene and (Z,Z)-cycloocta-1,5-diene, sensitized by chiral benzene-1,2,4,5-tetracarboxylates; indicating a switching of the enantio-differentiation mechanism, which is attributable to dramatic conformational changes of chiral alkoxycarbonyl auxiliaries at a specific pressure. |
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