Yk. Chen et Yy. Chen, A new type of amido-substituted p-tert-butylcalix[6]arene: Double diamide bridges on the lower rim, ORG LETT, 2(6), 2000, pp. 743-745
A convenient method for the synthesis of intramolecularly bridged calix[6]a
renes by bis(chloroacetyl)amide was reported. A 1,3-singly bridged derivati
ve and an asymmetrical 1,3-4,5 doubly bridged derivative were obtained, res
pectively.