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The reaction of 1,3,5-tri-O-alkylated calix[6]arenes with 1,3,5-tris(bromomethyl)benzene yielded capped calix[6]arenes (2 with tert-butyl groups on the upper rim and 3 without tert-butyl groups) in unexpectedly high yields (80 - 91%). Combined studies of 2 and 3 by MM3 computation, X-ray analysis, and 1 H NMR spectroscopy established that these calix[6]arenes feature a unique structure consisting...
It has become possible to synthesize all possible calix[6]arene derivatives with MeO- and ROCOCH 2 O- substituents from corresponding O-methylated calix[6]arenes(2-7). The yields of these reactions were relatively high and the products could be easily purified because of the absence of other regioisomers. They are mono-, three di-, three tri-, three tetra-, one penta-, and one hexa-EtOCOCH...
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