Ks. Paek et al., UNEXPECTED REGIOSELECTIVE SYNTHESIS OF 5,17-DIBROMO-11,23-DIHYDROXYCALIX[4]ARENE HEXYL ETHER, Supramolecular chemistry, 5(1), 1995, pp. 83-85
Using transmetallation, quenching with B(OCH3)(3), and oxidation regio
selectively upper-rim functionalized dibromodihydroxycalix[4]arene hex
yl ether was synthesized from p-bromocalix[4]arene hexyl ether in good
yield.