Syntheses of novel types of calix[6]bis-crowns and related compounds

The syntheses of novel types of p-tert-butylcalix[6]bis-crowns and related compounds is described. By reacting p-tert-butylcalix[6]-1,4-crown-4 with e thylene glycol ditosylate or polyethylene glycol ditosylates using NaH as a base in DMF, p-tert-butylcalix[6]-2,3-ethylene-1,4-crown-4, p-tert-butylca lix[6]-1,4-crown-4-2,6-crown-3, monotosyloxyethoxyethyl-p-tert-butylcalix[6 ]-1,4-crown-4, p-tert-butylcalix[6]-1,4-crown-4-2,5-benzocrown-4 and p-tert -butylcalix[6]-1,4-crown-4-2,6-crown-5 were obtained in reasonable yields u nder selective conditions.