M. Makha et Cl. Raston, Direct synthesis of calixarenes with extended arms: p-phenylcalix[4,5,6,8]arenes and their water-soluble sulfonated derivatives, TETRAHEDR L, 42(35), 2001, pp. 6215-6217
p-Phenylcalix[4,5.6.8]arenes have been isolated from the base catalysed con
densation of p-phenylphenol with formaldehyde in tetralin. and selectively
converted to the corresponding sulfonated derivatives using sulfuric or chl
orosulfonic acids. (C) 2001 Elsevier Science Ltd. All rights reserved.