Calixarenes with exo-hydroxy groups: Synthesis, crystal and molecular structure of ortho-tert-butylphenol-based calix [4]-, calix [6]-and calix [8] arenes
…, C Porta, F Bigi, R Maggi, F Peri, E Marzi, M Lanfranchi…
Index: Sartori, Giovanni; Porta, Cecilia; Bigi, Franca; Maggi, Raimondo; Peri, Francesco; Marzi, Elena; Lanfranchi, Maurizio; Pellinghelli, Maria Angela Tetrahedron, 1997 , vol. 53, # 9 p. 3287 - 3300
Full Text: HTML
Citation Number: 12
Abstract
Ortho-tert-butylcalixarenes 3, 4 and 5 with exo-hydroxy groups were synthesised by tin tetrachloride-promoted condensation of 2, 2′-dihydroxy-3, 3′-di-tert- butyldiphenylmethane 6 with formaldehyde. While 1H NMR analysis of compounds 3, 4 and 5 revealed a considerable annular flexibility in CDCl3 solution, their X-ray single crystal analysis showed the presence of a strong intramolecular hydrogen bonds between the ...