Abstract
A novel spirobifluorene diamine monomer, 2,2′-diamino-7-tert-butyl-9,9′-spirobifluorene, was obtained starting from the readily available reagent 4,4′-di-tert-butylbiphenyl. The key step of the synthesis is the introduction of a nitro group into the 2-position of the spirobifluorene through the loss of tert-butyl at the 2-position.
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Acknowledgments
This work was financially supported by the Innovation Program of Shanghai Municipal Education Commission (no. 09YZ160) and the Natural Science Foundation of Shanghai City of China (no. 11ZR1426200).
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Xiao, H., Yin, H., Wang, L. et al. Synthesis of 2,2′-diamino-7-tert-butyl-9,9′-spirobifluorene starting from 4,4′-di-tert-butylbiphenyl. Monatsh Chem 143, 683–686 (2012). https://doi.org/10.1007/s00706-011-0620-5
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DOI: https://doi.org/10.1007/s00706-011-0620-5