Convenient Preparation of Novel Calix[n]cryptands (n = 4, 6)

Convenient syntheses of novel tripodal calix[4]cryptand and the first example of 1,2,4-tripodal calix[6]cryptand were reported by direct condensation of p-tert-butylcalix[4]arene or p-tert-butylcalix[6]arene with 1,1,1-tri (tosyloxyethoxyethoxymethyl)-propane. Besides, a novel type of doublecalix[4]arenes and a novel type of calix[6]crown, were co-prepared, respectively. It was suggested that the synthetic strategy described in this paper may be genegally useful to explore the little-known field of calixcryptands.