STUDY ON THE SYNTHESIS OF P-TERT-BUTYLCALIXARENES AND P-ISOPROPENYLCALIXARENES

A new method for one-step synthesis of calixarenes has been developed. Ethylene glycol was used as the medium, and sodium tetraborate-decahy drate as the catalyst. For the first time p-isopropenylcalix[6]arene a nd p-isopropenylcalix[8]arene were obtained. A parallel investigation of polycondensation and cyclization of p-tert-butylphenol and p-isopro penylphenol was performed. The influence of the quantities of the cata lyst and formaldehyde on the composition of the reaction products and the yield of cyclic oligomers were investigated. The conditions ensuri ng the highest yield of p-isopropenylcalixarenes were found.