Journal of the American Chemical Society p. 6979 - 6985 (1990)
Update date:2022-09-26
Topics:
Ghidini, Eleonora
Ugozzoli, Franco
Ungaro, Rocco
Harkema, Sybolt
Abu El-Fadl
Reinhoudt, David N.
Selective bridging of p-tert-butylcalix[4]arene (1) with tetra-and pentaethylene glycol ditosylate gives the 1,3-dihydroxy-p-tert-butylcalix[4]arene crown ethers 7 and 9 in good yields. The subsequent alkylation of the two phenolic groups of 7 and 9 with
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