P. Novakov et al., STUDY ON THE SYNTHESIS OF P-TERT-BUTYLCALIXARENES AND P-ISOPROPENYLCALIXARENES, Die Angewandte makromolekulare Chemie, 255, 1998, pp. 23-28
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.