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- W2084686048 abstract "The triple layered tetraazacyclophane 3a was prepared in high yield by a fourfold bond connection in a one-pot reaction sequence. The helical chirality of 3a results from the unique crossed meta/meta-cyclophane linkage. A racemisation process can only take place by breaking a covalent bond. The X-ray structure analysis of 3a proved the constitution of the isomer, difficult to determine by spectroscopy, and revealed a face to face arrangement of the skeleton arene rings. Enantiomer separation was achieved by HPLC on a cellulose–tris(3,5-dimethylphenylcarbamate) column. The CD spectrum of 3a was recorded and chiroptical properties are discussed." @default.
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- W2084686048 date "1998-04-01" @default.
- W2084686048 modified "2023-09-27" @default.
- W2084686048 title "A triple layered helical chiral cyclophane—one-pot synthesis, enantiomer separation and chiroptical properties" @default.
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- W2084686048 doi "https://doi.org/10.1016/s0957-4166(98)00115-3" @default.
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