Fully O-alkylated calix[4]arenes have been synthesized by the alkylati
on of p-tert-buhlcalix[4]arene and its 1.3-dialkylated derivatives in
liquid-liquid phase-transfer catalytic process. 1H(4) and 1H(2)R(2) co
uld effeciently be deprotonated by aqueous NaOH (50% w/w)-toluene syst
em and alkylated with alkyl (aralkyl. allyl) halogens in good yields a
ffording calix[4]arene tetraethers of cone conformation.