Abstract
Lower-rim mono- and diacylated calix[4]arenes [acyl = C6H5CO, 3,5-(NO2)2C6H3CO] undergo selective adamantylation with 3-Y-1-adamantanols (Y = H, i-Pr, 4-MeC6H4) in trifluoroacetic acid at the free phenolic fragments of the macroring. The reaction provides a convenient preparative route to di-, tri-, and tetraadamantylated calix[4]arenes.
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Shokova, E.A., Khomich, A.N. & Kovalev, V.V. Selective Upper-Rim Adamantylation of Calix[4]arenes. Russian Journal of Organic Chemistry 37, 612–619 (2001). https://doi.org/10.1023/A:1012423128245
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DOI: https://doi.org/10.1023/A:1012423128245